<?xml version="1.0" encoding="UTF-8"?>
<xml><records><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">A. Busic</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">J. Fourneau</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Level Crossing Ordering of Markov Chains: Proving Convergence and Bounding End to End Delays in an All Optical Network</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2007</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">ACM Proceedings from Valuetools 2007</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">ACM</style></PUBLISHER><title><style face="normal" font="default" size="100%">Level Crossing Ordering of Markov Chains: Proving Convergence and Bounding End to End Delays in an All Optical Network</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Adam Józefiok</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Performance evaluation of multiuser interactive networking system</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2010</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Proceedings of 6th International Conference HET-NETs 2010</style></SECONDARY_TITLE><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Gliwice, Bałtycka 5</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">IITiS PAN</style></PUBLISHER><PAGES><style face="normal" font="default" size="100%">223–231</style></PAGES><ABSTRACT><style face="normal" font="default" size="100%">The article presents a work in progress aiming at performance evaluation of a large database system at an assurance company. The system includes a server with a database and a local area network with a number of terminals where the company employees run applications that introduce documents or retrieve them from the database. We discuss a model of clients activities. Measurements were collected inside the working system: the phases at each users application were identified and their duration was measured. The collected data are used to construct a synthetic model of applications activities which is then applied to predict the system bahaviour in case of the growth of the number of users.</style></ABSTRACT><title><style face="normal" font="default" size="100%">Performance evaluation of multiuser interactive networking system</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">A. Brachman</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Analiza wydajności protokołu TCP-NCR w sieciach bezprzewodowych</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2007</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Materiały Konferencji Sieci Komputerowe</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Wydawnictwo Komunikacji i Łączności</style></PUBLISHER><DATE><style face="normal" font="default" size="100%">6</style></DATE><title><style face="normal" font="default" size="100%">Analiza wydajności protokołu TCP-NCR w sieciach bezprzewodowych</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Joanna Domańska</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Dynamics of TCP/IP flows in presence of various AQM algorithms, a fluid flow approximation model</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2006</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Third EuroNGI Workshop on New Trends in Modelling, Quantitative methods and Measurements</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Politecnico de Torino</style></PUBLISHER><title><style face="normal" font="default" size="100%">Dynamics of TCP/IP flows in presence of various AQM algorithms, a fluid flow approximation model</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Joanna Domańska</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">TCP/IP dynamics in wireless environment, a fluid-flow model</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2006</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Third Workshop on Wireless and Mobility</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Technical University of Catalonia</style></PUBLISHER><DATE><style face="normal" font="default" size="100%">VI</style></DATE><title><style face="normal" font="default" size="100%">TCP/IP dynamics in wireless environment, a fluid-flow model</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Adam Józefiok</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Tomasz Nycz</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Simulation, Markov Chain and Diffusion Approximation Models – a Case Study</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2011</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%"/></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><title><style face="normal" font="default" size="100%">Simulation, Markov Chain and Diffusion Approximation Models – a Case Study</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Adam Józefiok</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Tomasz Nycz</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Porównanie metod analizy efektywności na przykładzie serwera aplikacji w sieci lokalnej</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2011</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Studia Informatica</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">32</style></VOLUME><NUMBER><style face="normal" font="default" size="100%">3A</style></NUMBER><PAGES><style face="normal" font="default" size="100%">7–20</style></PAGES><ABSTRACT><style face="normal" font="default" size="100%">W artykule przedstawiono model kolejkowy służący do oceny funkcjonowania dużego systemu sieciowego, w skład którego wchodzi rozbudowany system bazodanowy. Opisywany system jest systemem rzeczywistym. Zebrane wyniki pracy systemu posłużyły do budowy modelu działania aplikacji interakcyjnych, na podstawie łańcuchów Markova, aproksymacji dyfuzyjnej i symulacji zdarzeń dyskretnych. Porównanie ich z rzeczywistymi wynikami umożliwiło sprawdzenie przdatności użytych metod w rzeczywistych warunkach.</style></ABSTRACT><title><style face="normal" font="default" size="100%">Porównanie metod analizy efektywności na przykładzie serwera aplikacji w sieci lokalnej</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Adam Józefiok</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Tomasz Nycz</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Ferhan Pekergin</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Erol Gelenbe</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Ricardo Lent</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Georgia Sakellari</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Performance Evaluation of a Multiuser Interactive Networking System: A Comparison of Modelling Methods</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2012</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Computer and Information Sciences II</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Springer</style></PUBLISHER><PAGES><style face="normal" font="default" size="100%">215–222</style></PAGES><ABSTRACT><style face="normal" font="default" size="100%">This article presents a queueing model for performance evaluation of a large database system at an assurance company. The system includes a server with a database and a local area network with a number of terminals where the company employees run applications that introduce documents or retrieve them from the database. We discuss a model of clients activities. Measurements were collected inside the working system: the phases at each users application performance were identified and their duration was measured. The collected data are used to construct a synthetic model of applications activities which is then applied to predict the system behaviour in case of the growth of the number of users. We apply simulation, Markov and diffusion models-their comparison, based on real data, may better verify the utility of particular methods than usual academic examples.</style></ABSTRACT><title><style face="normal" font="default" size="100%">Performance Evaluation of a Multiuser Interactive Networking System: A Comparison of Modelling Methods</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Ferhan Pekergin</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">J. Garcia-Vidal</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">l. Cerda-Alabern</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Stability and Dynamics of TCP-NCR(DCR) Protocol</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2007</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Lecture Notes in Computer Systems 4396 - Wireless Systems and Mobility in Next Generation Internet</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">SpringeVerlag</style></PUBLISHER><PAGES><style face="normal" font="default" size="100%">241–254</style></PAGES><DATE><style face="normal" font="default" size="100%">5</style></DATE><ABSTRACT><style face="normal" font="default" size="100%">The fluid-flow approximation models investigate with much success the dynamics and stability of TCP/RED connections. Their main assumption is that the fluctuations of variables characterizing the behaviour of the connections are relatively small, that enables the linearization of model and the use of traditional control analysis tools to obtain such measures as Bode gain, phase margins, tracking error or delay margin. In this article, preserving linear fluid-flow model, we propose its extension to the case when a network is composed of wired and wireless part. We consider a variant of TCP algorithm (TCP-DCR or its new version TCP-NCR) and fluid-flow differential equations representing the size of congestion window, mean queue at the bottleneck router and loss probability at a RED queue are supplemented with terms representing constant loss probability due to transmission in wireless part and probability that a fraction of these errors is recovered by a link level mechanism. The decrease of congestion window due to TCP mechanism is delayed to allow the link protocol to deal with the errors. The model considers the presence of uncontrollable UDP flows.</style></ABSTRACT><title><style face="normal" font="default" size="100%">Stability and Dynamics of TCP-NCR(DCR) Protocol</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Ferhan Pekergin</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Un modele d’approximation de diffusion pour la distribution du temps d’acheminement des paquets dans les réseaux de senseurs</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2008</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Colloque francophone sur l’ingénierie des protocoles</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><title><style face="normal" font="default" size="100%">Un modele d’approximation de diffusion pour la distribution du temps d’acheminement des paquets dans les réseaux de senseurs</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Ferhan Pekergin</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Estimation of packet transfer time at sensor networks, diffusion approximation approach</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2008</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Proceedings from HET-NETs</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><title><style face="normal" font="default" size="100%">Estimation of packet transfer time at sensor networks, diffusion approximation approach</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Ferhan Pekergin</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">TCP performance for a wireless traffic, a diffusion approxiation model</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2008</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Proceedings from Workshop on Wireless and mobility in Future Generation Internet</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><DATE><style face="normal" font="default" size="100%">2</style></DATE><title><style face="normal" font="default" size="100%">TCP performance for a wireless traffic, a diffusion approxiation model</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Ferhan Pekergin</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Fluid-flow Approximation Model of TCP-NCR in wired-wireless networks</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2007</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Proceedings from Polish Teletraffic Symposium</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">IITiS PAN</style></PUBLISHER><DATE><style face="normal" font="default" size="100%">9</style></DATE><title><style face="normal" font="default" size="100%">Fluid-flow Approximation Model of TCP-NCR in wired-wireless networks</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Ferhan Pekergin</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">A model of TCP flows dynamics</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2006</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Theoretical and Applied Informatics</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">18</style></VOLUME><NUMBER><style face="normal" font="default" size="100%">4</style></NUMBER><PAGES><style face="normal" font="default" size="100%">279–292</style></PAGES><ABSTRACT><style face="normal" font="default" size="100%">The fluid flow approximation models investigate with much success the dynamics and stability of TCP/RED connections. Their main assumption is that the fluctuations of variables characterizing the behaviour of the connections are relatively small, that enables the linearization of model and the use of traditional control analysis tools to obtain such measures as Bode gain, phase margins, tracking error or delay margin</style></ABSTRACT><title><style face="normal" font="default" size="100%">A model of TCP flows dynamics</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Ferhan Pekergin</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Some contributions to the modelling the dynamics of (TCP,UDP)/RED flows over reliable and unreliable connections</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2006</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Proceedings from HET-NETs 2006</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><DATE><style face="normal" font="default" size="100%">9</style></DATE><title><style face="normal" font="default" size="100%">Some contributions to the modelling the dynamics of (TCP,UDP)/RED flows over reliable and unreliable connections</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">T. Nycz</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Ferhan Pekergin</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Modeling the IEEE 802.11 Networks MAC Layer Using Diffusion Approximation</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2010</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Proceeding of HET-NETs 2010</style></SECONDARY_TITLE><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Gliwice, Bałtycka 5</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Institute of Theoretical and Applied Informatics of the Polish Academy of Sciences</style></PUBLISHER><PAGES><style face="normal" font="default" size="100%">429–442</style></PAGES><DATE><style face="normal" font="default" size="100%">1</style></DATE><ABSTRACT><style face="normal" font="default" size="100%">Abstract: The article presents an analytical model of wireless networks using the IEEE 802.11 protocol to access the transport medium. The model allows to determine such key factors of the quality of service as transmission delays and losses. The model is based on diffusion approximation approach which was proposed three decades ago to model wired networks. We show that it can be adapted to take into consideration the input streams with general interarrival time distributions and servers with general service time distributions. The diffusion approximation has been chosen because of fairly general assumptions of models based on it, hard to be represented in Markov models. A queueing network model can have an arbitrary topology, the intensity of transmitted flows can be represented by non-Poisson (even self-similar) streams, the service times at nodes can be defined by general distributions. These assumptions are important: because of the CSMA/CA algorithm, the overall times needed to sent a packet are far from being exponentially distributed and therefore the flows between nodes are non-Poisson. Diffusion approximation allows us also to analyse the of transient behaviour of a network when traffic intensity is changing with time.</style></ABSTRACT><title><style face="normal" font="default" size="100%">Modeling the IEEE 802.11 Networks MAC Layer Using Diffusion Approximation</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">T. Nycz</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Ferhan Pekergin</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Mateusz Nowak</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Duration of boot-up storm period</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2012</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">17th Polish teletraffic symposium</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">IITiS PAN</style></PUBLISHER><PAGES><style face="normal" font="default" size="100%">145–150</style></PAGES><DATE><style face="normal" font="default" size="100%">12</style></DATE><ABSTRACT><style face="normal" font="default" size="100%">The simultaneous boot of multiple virtual machines or networking devices imposes heavy load on the networking infrastructure. In large network of virtual machines the coordination of the reboots and the device registration is required. In the paper we present a simple analytical model to compute the distribution of boot-up time. The model is verified by comparison to a simulation model, and may be used to check the influence of several parameters on the overall boot-up time during a boot storm.</style></ABSTRACT><title><style face="normal" font="default" size="100%">Duration of boot-up storm period</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">T. Nycz</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Ferhan Pekergin</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">A diffusion approximation model for wireless networks based on IEEE 802.11 standard, Computer Communication Journal</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2010</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Computer Communication Journal</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">33</style></VOLUME><NUMBER><style face="normal" font="default" size="100%">S1</style></NUMBER><PAGES><style face="normal" font="default" size="100%">S86–S92</style></PAGES><ABSTRACT><style face="normal" font="default" size="100%">The article presents an analytical model of wireless networks using the IEEE 802.11 protocol to access the transport medium. The model allows to determine such key factors of the quality of service as transmission delays and losses. The model is based on diffusion approximation approach which was proposed three decades ago to model wired networks. We show that it can be adapted to take into consideration the input streams with general interarrival time distributions and servers with general service time distributions. The diffusion approximation has been chosen because of fairly general assumptions of models based on it, hard to be represented in Markov models. A queueing network model can have an arbitrary topology, the intensity of transmitted flows can be represented by non-Poisson (even self-similar) streams, the service times at nodes can be defined by general distributions. These assumptions are important: because of the CSMA/CA algorithm, the overall times needed to sent a packet are far from being exponentially distributed and therefore the flows between nodes are non-Poisson. Diffusion approximation allows us also to analyse the of transient behaviour of a network when traffic intensity is changing with time.</style></ABSTRACT><title><style face="normal" font="default" size="100%">A diffusion approximation model for wireless networks based on IEEE 802.11 standard, Computer Communication Journal</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>7</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Joanna Domańska</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">T. Atmaca</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Stefan Węgrzyn</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Lech Znamirowski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Stanisław Kozielski</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Nowe Technologie Sieci Komputerowych</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2006</style></YEAR><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Wydawnictwo Komunikacji i Łączności</style></PUBLISHER><VOLUME><style face="normal" font="default" size="100%">1</style></VOLUME><SECTION><style face="normal" font="default" size="100%">Mechanizm optycznego przełączania ciągów danych</style></SECTION><title><style face="normal" font="default" size="100%">Nowe Technologie Sieci Komputerowych</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Pawel Foremski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Michał Gorawski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Source Model of TCP Traffic in LTE Networks</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2014</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Information Sciences and Systems 2014</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><ABSTRACT><style face="normal" font="default" size="100%">We propose a generator that represents traffic transmitted in wireless mobile networks. It is based on the measurements of traffic in large scale LTE networks. The proposed tool generates TCP flow sizes and duration. We verify the proposed generator by comparison with traces available in the literature and propose application in discrete event simulators.</style></ABSTRACT><title><style face="normal" font="default" size="100%">Source Model of TCP Traffic in LTE Networks</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Pawel Foremski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Michał Gorawski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Konrad Połys</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Energy-Efficient Crowdsensing of Human Mobility and Signal Levels in Cellular Networks</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2015</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Sensors</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">15</style></VOLUME><NUMBER><style face="normal" font="default" size="100%">9</style></NUMBER><DATE><style face="normal" font="default" size="100%">9</style></DATE><ABSTRACT><style face="normal" font="default" size="100%">The paper presents a practical application of the crowdsensing idea to measure human mobility and signal coverage in cellular networks. Currently, virtually everyone is carrying a mobile phone, which may be used as a sensor to gather research data by measuring, e.g., human mobility and radio signal levels. However, many users are unwilling to participate in crowdsensing experiments. This work begins with the analysis of the barriers for engaging people in crowdsensing. A survey showed that people who agree to participate in crowdsensing expect a minimum impact on their battery lifetime and phone usage habits. To address these requirements, this paper proposes an application for measuring the location and signal strength data based on energy-efficient GPS tracking, which allows one to perform the measurements of human mobility and radio signal levels with minimum energy utilization and without any engagement of the user. The method described combines measurements from the accelerometer with effective management of the GPS to monitor the user mobility with the decrease in battery lifetime by approximately 20%. To show the applicability of the proposed platform, the sample results of signal level distribution and coverage maps gathered for an LTE network and representing human mobility are shown.</style></ABSTRACT><title><style face="normal" font="default" size="100%">Energy-Efficient Crowdsensing of Human Mobility and Signal Levels in Cellular Networks</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Pawel Foremski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Piotr Gaj</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">LTE or WiFi? Client-Side Internet link selection for smartphones.</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2015</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Computer Networks</style></SECONDARY_TITLE><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Springer International Publishing Switzerland</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PAGES><style face="normal" font="default" size="100%">43–53</style></PAGES><ABSTRACT><style face="normal" font="default" size="100%">Current mobile phones and tablets are equipped with two technologies for accessing the Internet: WiFi and Cellular. Deciding which of these two interfaces provides faster data transfer is often non-trivial, but most of the currently used devices use a simple priority scheme that prefers WiFi to Cellular. In this paper, we propose a novel system that automatically selects the best link available in the current user location. The system periodically probes the bandwidth available on both links and makes statistical predictions, while avoiding excessive data and battery usage. We experimentally validated our approach using a dedicated application for Android.</style></ABSTRACT><NOTES><style face="normal" font="default" size="100%">22nd International Conference, CN 2015 Brunów, Poland, June 16-19, 2015</style></NOTES><title><style face="normal" font="default" size="100%">LTE or WiFi? Client-Side Internet link selection for smartphones.</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Michał Gorawski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Review of mobility models for performance evaluation of wireless networks</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2014</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Advance in Intelligent Systems and Computing</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">242</style></VOLUME><PAGES><style face="normal" font="default" size="100%">567–577</style></PAGES><ABSTRACT><style face="normal" font="default" size="100%">Performance evaluation of protocols and mechanisms in wireless networks require a good representation of client mobility. The number of mobility models has been developed, to emulate the changes of location in time of mobile wireless devices in communication networks, such as e.g. mobile phones, tablets, netbooks, palmtops.Mobility models are used to verify the protocols and algorithms developed for wireless networks in simulation and using analytical tools. The mobility patterns of such devices converges with human movement patterns, as the mobile devices bearers. Among many propositions of human mobility modeling in the literature this paper presents and reviews techniques which are most commonly used or that give very good estimation of actual mobile device bearer behavior. The models are divided into 3 groups: random, social and hybrid.</style></ABSTRACT><NOTES><style face="normal" font="default" size="100%">ICMMI 2013 International Conference on Man-Machine Interactions Brenna, October 22-25, 2013</style></NOTES><title><style face="normal" font="default" size="100%">Review of mobility models for performance evaluation of wireless networks</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Michał Gorawski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">The Real-Life Mobility Model: RLMM</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2013</style></YEAR><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><ABSTRACT><style face="normal" font="default" size="100%">The performance evaluation of mobile wireless networks requires a representation of user mobility. Mobility models are the essential part of such evaluation because they assure examples of mobile nodes movement for typical scenarios. Mobility models provide synthetic traces adjusted to user’s needs. We propose a novel RLMM model that produces synthetic traces of a working human and includes clear division on working days and weekend activities. We describe the model and evaluate it using simulation. The model provides better representation of changes in human behavior on different days than the models available in the literature.</style></ABSTRACT><title><style face="normal" font="default" size="100%">The Real-Life Mobility Model: RLMM</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Arkadiusz Sochan</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">A tool for network traffic generation and transmission delay measurement</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2001</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Proceedings of 8th Polish Teletraffic Symposium</style></SECONDARY_TITLE><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Gliwice</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">IITiS PAN</style></PUBLISHER><title><style face="normal" font="default" size="100%">A tool for network traffic generation and transmission delay measurement</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>7</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Andrzej Grzywak</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Nowe technologie w komputerowych systemach zarządzania</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2005</style></YEAR><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">WKŁ</style></PUBLISHER><SECTION><style face="normal" font="default" size="100%">Wpływ algorytmów kolejkowania pakietów na jakość usług w łączu ADSL</style></SECTION><title><style face="normal" font="default" size="100%">Nowe technologie w komputerowych systemach zarządzania</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Simulation analysis of a virtualization system performance in Boot Up Scenario</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2012</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">International Conference on Networking and Future Internet</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PAGES><style face="normal" font="default" size="100%">21–24</style></PAGES><ABSTRACT><style face="normal" font="default" size="100%">The simultaneous boot of multiple virtual machines or networking devices imposes heavy load on the networking infrastructure. In large network of many virtual machines the coordination of the reboots and device registration is required. In the paper few distributed mechanisms for coordination of virtual machine or network device registration are analyzed by simulation.</style></ABSTRACT><title><style face="normal" font="default" size="100%">Simulation analysis of a virtualization system performance in Boot Up Scenario</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Simulation Comparison of Active Queue Management Algorithms in TCP/IP Networks</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2008</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Journal of Telecommunication Systems</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">39</style></VOLUME><NUMBER><style face="normal" font="default" size="100%">2-3</style></NUMBER><title><style face="normal" font="default" size="100%">Simulation Comparison of Active Queue Management Algorithms in TCP/IP Networks</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">The Analysis Of Traffic Shaping In Tcp Connection In Laboratory Network</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2007</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Proceedings from ISAT Conference</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><title><style face="normal" font="default" size="100%">The Analysis Of Traffic Shaping In Tcp Connection In Laboratory Network</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Simulation Analysis of Active Queue Management Algorithms in IP Networks</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2007</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Proceedings from Fourth EuroFGI Workshop on "New Trends in Modelling, Quantitative Methods and Measurements"</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><title><style face="normal" font="default" size="100%">Simulation Analysis of Active Queue Management Algorithms in IP Networks</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Generator pakietów w środowisku sieci heterogenicznych</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2001</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Studia Informatica</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">22</style></VOLUME><NUMBER><style face="normal" font="default" size="100%">2 (44)</style></NUMBER><title><style face="normal" font="default" size="100%">Generator pakietów w środowisku sieci heterogenicznych</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">A tool for network traffic generation and transmission delay measurement</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2001</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Archiwum Informatyki teoretycznej i Stosowanej</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">13</style></VOLUME><NUMBER><style face="normal" font="default" size="100%">3</style></NUMBER><title><style face="normal" font="default" size="100%">A tool for network traffic generation and transmission delay measurement</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">A. Busic</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">J. Fourneau</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Simulation Analysis of Deflection Routing in Hypercube</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2007</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Proceedings from Polish Teletraffic Symposium</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">IITiS PAN</style></PUBLISHER><DATE><style face="normal" font="default" size="100%">9</style></DATE><title><style face="normal" font="default" size="100%">Simulation Analysis of Deflection Routing in Hypercube</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>7</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Przemysław Głomb</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Arkadiusz Sochan</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Andrzej Grzywak</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Internet w społeczeństwie informacyjnym - Podstawowe problemy Internetu</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2004</style></YEAR><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Warszawa</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Wydawnictwa Naukowo-Techniczne</style></PUBLISHER><SECTION><style face="normal" font="default" size="100%">Badania symulacyjne pakietowych sieci optycznych o dowolnych topologiach</style></SECTION><title><style face="normal" font="default" size="100%">Internet w społeczeństwie informacyjnym - Podstawowe problemy Internetu</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Jerzy Klamka</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Numerical Model of Tcp in 802.16 Networks Using Fluid Flow Approximation</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2011</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">First International Conference on Networking and Future Internet 2011 (ICNFI 2011)</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><title><style face="normal" font="default" size="100%">Numerical Model of Tcp in 802.16 Networks Using Fluid Flow Approximation</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Pawel Foremski</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Demo: Wireless Link Selection on Smartphone: Throughput vs Battery Drain</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2015</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">MobiCom '15 Proceedings of the 21st Annual International Conference on Mobile Computing and Networking</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">ACM</style></PUBLISHER><PAGES><style face="normal" font="default" size="100%">190–192</style></PAGES><ABSTRACT><style face="normal" font="default" size="100%">The method for automatic selection of wireless interface on smart phones is presented. We consider the selection between WiFi and LTE / 3G radios to maximize the throughput of the data transmission and minimize the amount of energy used to scan and measure the throughput of the network. The proposed selection algorithm defines when to measure and how to estimate the network throughput to balance between the accuracy of the selection and the battery drain caused by the measurements. The link speed estimation method optimized for LTE and WiFi networks is also demonstrated.</style></ABSTRACT><title><style face="normal" font="default" size="100%">Demo: Wireless Link Selection on Smartphone: Throughput vs Battery Drain</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">J. Fourneau</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Simulation Analysis of Eulerian Routing with Shortcuts in All-optical networks</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2005</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">materiały konferencji: Second EuroNGI Workshop on</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><title><style face="normal" font="default" size="100%">Simulation Analysis of Eulerian Routing with Shortcuts in All-optical networks</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Przemysław Głomb</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Kształtowanie ruchu w routerach pracujących w systemie Linux</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2002</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Studia Informatica</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">23</style></VOLUME><NUMBER><style face="normal" font="default" size="100%">2A</style></NUMBER><title><style face="normal" font="default" size="100%">Kształtowanie ruchu w routerach pracujących w systemie Linux</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>7</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Przemysław Głomb</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Arkadiusz Sochan</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Andrzej Grzywak</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Współczesne problemy sieci komputerowych - Nowe technologie</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2004</style></YEAR><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Warszawa</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Wydawnictwa Naukowo-Techniczne</style></PUBLISHER><SECTION><style face="normal" font="default" size="100%">Kształtowanie ruchu w transmisjach wideo wykorzystujących kompresję falkową</style></SECTION><ABSTRACT><style face="normal" font="default" size="100%">Rozdział przedstawia budowę i wyniki badań symulacyjnych mechanizmu sterowania transmisją sieciową skalowalnego strumienia wideo. Skalowalność typu SNR otrzymywana jest z wykorzystaniem transformaty falkowej, a sterowanie zrealizowane jest z użyciem regulatora proporcjonalno-różniczkującego w oparciu o pomiar opóźnień kolejnych ramek.</style></ABSTRACT><title><style face="normal" font="default" size="100%">Współczesne problemy sieci komputerowych - Nowe technologie</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Piotr Pecka</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">The Markov chain model of RED active queuing management algorithm</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2006</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Proceedings from HET-NETs 2006</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><title><style face="normal" font="default" size="100%">The Markov chain model of RED active queuing management algorithm</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Piotr Pecka</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Analiza wydajności mechanizmu RED za pomocą łańcuchów Markowa z czasem ciągłym</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2006</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Materiały Konferencji Sieci Komputerowe</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><title><style face="normal" font="default" size="100%">Analiza wydajności mechanizmu RED za pomocą łańcuchów Markowa z czasem ciągłym</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Arkadiusz Sochan</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Adaptive Streaming of Stereographic Video</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2009</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Computer Networks – Communications in Computer and Information Science, Springer</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">39</style></VOLUME><PAGES><style face="normal" font="default" size="100%">87–94</style></PAGES><DATE><style face="normal" font="default" size="100%">4</style></DATE><ABSTRACT><style face="normal" font="default" size="100%">We present a tool for online compression and streaming of stereoscopic video and images and consideration on adaptation of the video stream to network conditions. The software allows to use dierent encoding schema for video compression and streams the stereo frames using UDP protocol. We give measurements of the frame delays in the transmission for dierent codecs.</style></ABSTRACT><title><style face="normal" font="default" size="100%">Adaptive Streaming of Stereographic Video</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Arkadiusz Sochan</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Sieci prywatne oparte na technologii ATM</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2000</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Studia Informatica</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">1</style></VOLUME><ABSTRACT><style face="normal" font="default" size="100%">W artykule opisano koncepcję budowania prywatnych sieci ATM przy wykorzystaniu standardu PNNI. Opisane są możliwości konfiguracyjne przełącznika firmy FORE związane z PNNI. Na koniec opisano strukturę sieci ATM zbudowanej w IITiS PAN.</style></ABSTRACT><title><style face="normal" font="default" size="100%">Sieci prywatne oparte na technologii ATM</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Arkadiusz Sochan</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Przemysław Głomb</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">- Borcochi</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Transmission of scalable video streams</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2008</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Proceedings from the 4th Euro-NGI Workshop on New trends in network architectures and services</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><DATE><style face="normal" font="default" size="100%">4</style></DATE><title><style face="normal" font="default" size="100%">Transmission of scalable video streams</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>7</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Arkadiusz Sochan</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Przemysław Głomb</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Andrzej Grzywak</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Współczesne problemy sieci komputerowych - Zastosowanie i bezpieczeństwo</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2004</style></YEAR><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Warszawa</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Wydawnictwa Naukowo-Techniczne</style></PUBLISHER><SECTION><style face="normal" font="default" size="100%">Integracja systemów autoryzacji użytkowników w sieciowym środowisku heterogenicznym</style></SECTION><ABSTRACT><style face="normal" font="default" size="100%">Rozdział prezentuje jednolity system autoryzacji użytkowników umożliwiający dostęp do wszytskich zasobów sieci za pomocą jednego hasła. Zaprezentowano rozwiązanie wdrożone w IITiS PAN. Autorzy wykorzystali oprogramowanie firmy Microsoft oraz pakiety dostępne na zasadach open source takie jak: Samba, Dovecot, Apache oraz smbpamd.</style></ABSTRACT><title><style face="normal" font="default" size="100%">Współczesne problemy sieci komputerowych - Zastosowanie i bezpieczeństwo</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Przemysław Głomb</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Representing single-link traffic quality with kernel PCA</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2006</style></YEAR><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Instytut Informatyki Teoretycznej i Stosowanej</style></PUBLISHER><title><style face="normal" font="default" size="100%">Representing single-link traffic quality with kernel PCA</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Przemysław Głomb</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Modeling Connection State with Kernel PCA</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2005</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">2nd EuroNGI Workshop on New Trends in Modeling, Quantitative Methods and Measurements</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><title><style face="normal" font="default" size="100%">Modeling Connection State with Kernel PCA</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Przemysław Głomb</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Modelowanie stacji roboczych w sieci ATM przy użyciu symulatora OMNeT++</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2002</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Studia Informatica</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">23</style></VOLUME><NUMBER><style face="normal" font="default" size="100%">2A</style></NUMBER><title><style face="normal" font="default" size="100%">Modelowanie stacji roboczych w sieci ATM przy użyciu symulatora OMNeT++</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>7</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Przemysław Głomb</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Arkadiusz Sochan</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Andrzej Grzywak</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Internet w społeczeństwie informacyjnym - Podstawowe problemy Internetu</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2004</style></YEAR><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Warszawa</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Wydawnictwa Naukowo-Techniczne</style></PUBLISHER><SECTION><style face="normal" font="default" size="100%">Skalowalna kompresja wideo na potrzeby transmisji sieciowych</style></SECTION><ABSTRACT><style face="normal" font="default" size="100%">Artykuł prezentuje przegląd i badania zagadnienia skalowalności w stosowanych współcześnie technologiach kodowania sygnału wideo. W pierwszej części prezentowane są modele skalowalności przyjęte w stosowanych i opracowywanych standardach kompresji, w drugiej przedstawione są wyniki badań jakości transmisji skalowalnych strumieni w różnorodnych warunkach obciążenia. Całość zamknięta jest podsumowaniem możliwości sterowania transmisją sieciową takich strumieni.</style></ABSTRACT><title><style face="normal" font="default" size="100%">Internet w społeczeństwie informacyjnym - Podstawowe problemy Internetu</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Jerzy Klamka</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Modelling TCP Connection in WIMAX Network Using Fluid Flow Approximation.</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2011</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Applications and the Internet</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">IEEE Computer Society Press</style></PUBLISHER><PAGES><style face="normal" font="default" size="100%">502–507</style></PAGES><ABSTRACT><style face="normal" font="default" size="100%">The fluid-flow approximation models have been during last few years to analyze the dynamics and stability of TCP/RED connections in wired networks. The model assumes that the fluctuations of parameters of the connections are relatively low. The fluid flow models base on the linearization and use of control theory analysis tools to verify the stability and behavior of the analyzed system. In this article we use some extensions of fluid flow approximation to support time division multiplexing used in WiMAX wireless networks. We describe the modification of fluid flow equations to incorporate the delivery of packets as an on-off source with on and off times modulated by the WiMAX scheduling algorithm. The results of the fluid flow model have been compared to the measurement in a small test bed. We also show how to analyze the stability of the connection using control theory approach.</style></ABSTRACT><title><style face="normal" font="default" size="100%">Modelling TCP Connection in WIMAX Network Using Fluid Flow Approximation.</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Mateusz Nowak</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Sławomir Nowak</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Piotr Pecka</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Content Identification in PI CAN Network</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2011</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Computer Networks</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Springer</style></PUBLISHER><PAGES><style face="normal" font="default" size="100%">164–172</style></PAGES><title><style face="normal" font="default" size="100%">Content Identification in PI CAN Network</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>9</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Sławomir Nowak</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Joanna Domańska</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Sławomir Nowak</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Joanna Domańska</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Symulator zdarzeń dyskretnych OMNeT++v.3.3</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2009</style></YEAR><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">WSB</style></PUBLISHER><ISBN><style face="normal" font="default" size="100%">978-83-88936-70-8</style></ISBN><title><style face="normal" font="default" size="100%">Symulator zdarzeń dyskretnych OMNeT++v.3.3</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Sławomir Nowak</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Simple Traffic Shaping Algorithm for All-optical Networks</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2003</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">10th Polish Teletraffic Symposium PSRT 2003</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Information Society</style></PUBLISHER><PAGES><style face="normal" font="default" size="100%">413–418</style></PAGES><title><style face="normal" font="default" size="100%">Simple Traffic Shaping Algorithm for All-optical Networks</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Sławomir Nowak</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Wpływ mechanizmów kształtowania ruchu na wydajność sieci czysto optycznych</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2003</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Studia Informatica</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">2A</style></VOLUME><NUMBER><style face="normal" font="default" size="100%">53</style></NUMBER><PAGES><style face="normal" font="default" size="100%">221–228</style></PAGES><title><style face="normal" font="default" size="100%">Wpływ mechanizmów kształtowania ruchu na wydajność sieci czysto optycznych</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Sławomir Nowak</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Mateusz Nowak</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Andrzej Kwiecień</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Piotr Gaj</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">P. Stera</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">MAGANET - On the need of realistic topologies for AMI network simulations</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2014</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Computer Networks</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Springer International Publishing Switzerland</style></PUBLISHER><PAGES><style face="normal" font="default" size="100%">79–88</style></PAGES><ABSTRACT><style face="normal" font="default" size="100%">The article proposes MAGANET (Map-based Generator of AMI Network Topology), new map-based topology generator, designated for Advanced Metering Infrastructure (AMI) networks as well as for the urban wireless sensor networks (WSNs). The correct, reliable representation of network topology is crucial for the correct performance evaluation on large multihop wireless networks. Most of the current work us different random topologies. In the article we describe proposed new tool and its features. The comparison of the properties of topology provided by MAGANET for three different generation modes: uniform random, grid and map based is also presented.</style></ABSTRACT><NOTES><style face="normal" font="default" size="100%">21nd International Conference, CN 2014 Brunów, June 23-27, 2014</style></NOTES><title><style face="normal" font="default" size="100%">MAGANET - On the need of realistic topologies for AMI network simulations</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Konrad Połys</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Piotr Gaj</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Mobility robustness in LTE based on automatic neighbor relation table.</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2015</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Computer Networks</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Springer International Publishing Switzerland</style></PUBLISHER><PAGES><style face="normal" font="default" size="100%">232–241</style></PAGES><ABSTRACT><style face="normal" font="default" size="100%">We evaluate the effect of automatic updates to the LTE Neighbor Relation Table (NRT) to optimize the efficiency of handovers in the network. We propose an algorithm which monitors the handovers within the LTE network and detects events when the procedure was started to early (handover to early) or too late (handover too late). Basing on the observed statistics in Operation and Maintenance server (OAM) the proposed algorithm updates the NRT to maximize the network throughput and minimize the probability of loss of connectivity. Performed simulations show that correctly forbidden handovers can reduce number of unnecessary signaling, reduce risk of fail during handover and reduce the time required to perform the handovers.</style></ABSTRACT><NOTES><style face="normal" font="default" size="100%">22nd International Conference, CN 2015 Brunów, Poland, June 16-19, 2015</style></NOTES><title><style face="normal" font="default" size="100%">Mobility robustness in LTE based on automatic neighbor relation table.</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>7</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Arkadiusz Sochan</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Przemysław Głomb</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Andrzej Grzywak</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Internet w społeczeństwie informacyjnym - Podstawowe problemy Internetu</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2004</style></YEAR><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Warszawa</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Wydawnictwa Naukowo-Techniczne</style></PUBLISHER><SECTION><style face="normal" font="default" size="100%">Dostęp do usług katalogowych z wykorzystaniem języka XML w aplikacjach WWW</style></SECTION><ABSTRACT><style face="normal" font="default" size="100%">W rozdziale zarysowano koncepcję usług katalogowych i metody dostępu do nich. Przedstawiono architekturę aplikacji WWW i różne rozwiązania stosowane do tworzenia takich aplikacji. Zaprezentowano wyniki badań porównawczych przeprowadzonych dla tych rozwiązań. Na koniec scharakteryzowano opracowaną aplikację WWW korzystającą z usług katalogowych i XML.</style></ABSTRACT><title><style face="normal" font="default" size="100%">Internet w społeczeństwie informacyjnym - Podstawowe problemy Internetu</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>7</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Arkadiusz Sochan</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Przemysław Głomb</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Andrzej Grzywak</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Współczesne problemy sieci komputerowych - Nowe technologie</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2004</style></YEAR><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Warszawa</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Wydawnictwa Naukowo-Techniczne</style></PUBLISHER><SECTION><style face="normal" font="default" size="100%">Transmisje strumieni MPEG-2 z wykorzystaniem usługi VBR sieci ATM</style></SECTION><ABSTRACT><style face="normal" font="default" size="100%">W rozdziale opisano prace badawcze dotyczące transmisji strumieni MPEG-2 poprzez kanał o zmiennej przepływności bitowej w sieci ATM. Prace miały charakter zarówno doświadczalno-pomiarowy, jak i analityczny. Określono zależność funkcyjną pomiędzy parametrami ruchu sieci ATM, natężeniem strumienia wideo a jakością transmisji multimedialnej. Zależność powiązano z</style></ABSTRACT><title><style face="normal" font="default" size="100%">Współczesne problemy sieci komputerowych - Nowe technologie</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">T. Atmaca</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">T. Nycz</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Ferhan Pekergin</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Erol Gelenbe</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">R. Lent</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">A model of boot-up storm dynamics</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2014</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Computer and Information Sciences III</style></SECONDARY_TITLE><PLACE_PUBLISHED><style face="normal" font="default" size="100%">London</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Springer</style></PUBLISHER><PAGES><style face="normal" font="default" size="100%">371–379</style></PAGES><DATE><style face="normal" font="default" size="100%">10</style></DATE><ABSTRACT><style face="normal" font="default" size="100%">The simultaneous boot of multiple virtual machines or networking devices imposes heavy load on the networking infrastructure. In large network of many virtual machines the coordination of the reboots and device registration is required. In the paper we present a simple analytical model computing the distribution of boot-up time, which is verified by comparison to a simulation model and provide analysis of the influence of several parameters on the overall boot-up time during a boot storm.</style></ABSTRACT><NOTES><style face="normal" font="default" size="100%">27th International Symposium of Computer and Information Sciences, Brenna,Poland, October 22-15, 2013</style></NOTES><title><style face="normal" font="default" size="100%">A model of boot-up storm dynamics</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>7</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Konrad Połys</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Using Kalman Filters on GPS 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Połys</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">{Dobór parametrów mechanizmu zwielokrotnienia wykorzystania częstotliwości SFR w sieciach LTE}</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2015</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Materiały konferencyjne Krajowego Sympozjum Telekomunikacji i Teleinformatyki</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">KSTiT</style></PUBLISHER><title><style face="normal" font="default" size="100%">{Dobór parametrów mechanizmu zwielokrotnienia wykorzystania częstotliwości SFR w sieciach LTE}</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Michał Gorawski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Konrad Połys</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Comparison of Measurements and Simulation Model of Indoor Signal Level Variation in LTE Networks</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2015</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Proceedings of the 8th International Conference on Simulation Tools and Techniques</style></SECONDARY_TITLE><PLACE_PUBLISHED><style face="normal" font="default" size="100%">ICST, Brussels, Belgium, 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face="normal" font="default" size="100%">Materiały konferencyjne Krajowego Sympozjum Telekomunikacji i Teleinformatyki</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">KSTiT</style></PUBLISHER><title><style face="normal" font="default" size="100%">Analiza wpływu mocy nadawania stacji bazowych na mechanizmy równoważenia obciążenia w sieciach LTE</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>7</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Sławomir Nowak</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Mateusz Nowak</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Piotr Pecka</style></AUTHOR><AUTHOR><style face="normal" 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size="100%">Cham</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Springer International Publishing</style></PUBLISHER><PAGES><style face="normal" font="default" size="100%">214–224</style></PAGES><ISBN><style face="normal" font="default" size="100%">978-3-319-47217-1</style></ISBN><URL><style face="normal" font="default" size="100%">http://dx.doi.org/10.1007/978-3-319-47217-1_23</style></URL><title><style face="normal" font="default" size="100%">Global Queue Pruning Method for Efficient Broadcast in Multihop Wireless Networks</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Sławomir Nowak</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Mateusz Nowak</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Piotr Pecka</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Efektywne rozgłaszanie w wielohopowej sieci bezprzewodowej. 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Sieci dedykowane są do różnych zastosowań i różnią się specyfiką występujących w nich problemów związanych z komunikacją. W artykule przedstawiono kilka znanych rozwiązań problemu rozgłaszania oraz przedstawiono autorskie rozwiązanie, dedykowane do specyficznego problemu sieci typu AMI (Advanced Metering Infrastructure - zaawansowana infrastruktura pomiarowa). Sieć ta zakładała model komunikacji jeden-do-wielu, stosunkowo niewielką dynamikę zmian w sieci, możliwość istnienia długich ścieżek na drodze transmisji oraz szereg innych wymagań. Analizowane algorytmy nie spełniały postawionych wymagań. Artykuł opisuje opracowaną motodę i porównuje ją do wybranych rozwiązań referencyjncych.&lt;/p&gt;&#13;
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size="100%">Mariusz Słabicki</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Local approach to power management in LTE networks</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2015</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Telecommunications and Signal Processing (TSP), 2015 38th International Conference on</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">IEEE</style></PUBLISHER><title><style face="normal" font="default" size="100%">Local approach to power management in LTE networks</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>7</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Mariusz Słabicki</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Influence of the Management Protocols on the LTE Self-configuration Procedures’ Performance</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2016</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Information Sciences and Systems 2015</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Springer</style></PUBLISHER><PAGES><style face="normal" font="default" size="100%">439–446</style></PAGES><title><style face="normal" font="default" size="100%">Influence of the Management Protocols on the LTE Self-configuration Procedures’ Performance</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Pavel Masek</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Jiri Hosek</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Yahia Zakaria</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Dalibor Uhlir</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Vit Novotny</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Mariusz Słabicki</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Experimental evaluation of RAN modelling in indoor LTE deployment</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2015</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Ultra Modern Telecommunications and Control Systems and Workshops (ICUMT), 2015 7th International Congress on</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">IEEE</style></PUBLISHER><title><style face="normal" font="default" size="100%">Experimental evaluation of RAN modelling in indoor LTE deployment</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Mariusz Słabicki</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Performance evaluation of CoAP, SNMP and NETCONF protocols in fog computing architecture</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2016</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">NOMS 2016 - 2016 IEEE/IFIP Network Operations and Management Symposium</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><DATE><style face="normal" font="default" size="100%">April</style></DATE><title><style face="normal" font="default" size="100%">Performance evaluation of CoAP, SNMP and NETCONF protocols in fog computing architecture</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">P. Masek</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Mariusz Słabicki</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">J. Hosek</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Transmission Power Optimization in Live 3GPP LTE-A Indoor Deployment</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2016</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Ultra Modern Telecommunications and Control Systems and Workshops (ICUMT), 2016 8th International Congress on</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><title><style face="normal" font="default" size="100%">Transmission Power Optimization in Live 3GPP LTE-A Indoor Deployment</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Mariusz Słabicki</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">{PyLTEs – Python LTE Evaluation Framework for Quick and Reliable Network Optimization}</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2016</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">39th International Conference on Telecommunications and Signal Processing (TSP)</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><title><style face="normal" font="default" size="100%">{PyLTEs – Python LTE Evaluation Framework for Quick and Reliable Network Optimization}</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>9</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Erol Gelenbe</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Ricardo Lent</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Computer and Information Sciences ISCIS 2016</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2016</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Communications in computer Information Science</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">659</style></VOLUME><NUMBER><style face="normal" font="default" size="100%">659</style></NUMBER><PAGES><style face="normal" font="default" size="100%">500</style></PAGES><EDITION><style face="normal" font="default" size="100%">Springer</style></EDITION><title><style face="normal" font="default" size="100%">Computer and Information Sciences ISCIS 2016</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Konrad Połys</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Model zmienności przepływności bitowej transmisji w sieciach LTE oparty o łańcuchy Markowa</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2017</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Krajowe Sympozjum Telekomunikacji i Teleinformatyki </style></SECONDARY_TITLE><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Warsaw</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><DATE><style face="normal" font="default" size="100%">09/2017</style></DATE><title><style face="normal" font="default" size="100%">Model zmienności przepływności bitowej transmisji w sieciach LTE oparty o łańcuchy Markowa</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>7</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Sławomir Nowak</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Mateusz Nowak</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Piotr Pecka</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Piotr Gaj</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Andrzej Kwiecień</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Michał Sawicki</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Application of Fault-Tolerant GQP Algorithm in Multihop AMI Networks</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2017</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Computer Networks. CN 2017. Communications in Computer and Information Science, vol 718</style></SECONDARY_TITLE><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Cham</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Springer International Publishing</style></PUBLISHER><NUMBER><style face="normal" font="default" size="100%">Communications in Computer and Information Science, vol 718.</style></NUMBER><PAGES><style face="normal" font="default" size="100%">70-80</style></PAGES><ISBN><style face="normal" font="default" size="100%">978-3-319-59767-6</style></ISBN><ABSTRACT><style face="normal" font="default" size="100%">&lt;p&gt;The paper presents the evaluation of the GQP algorithm in AMI networks using real map based network topologies (low, medium and high density of buildings). The algorithm was compared to the reference algorithms: CB, SBA and DP. It was shown that the GQP algorithm presents the good scalability, relatively optimal number of selected forwarders and by introducing the redundancy factor, good fault tolerance. An improvement to GQP algorithm to add a redundancy factor is proposed, what allows to execute fault tolerant broadcast transmission.&lt;/p&gt;&#13;
</style></ABSTRACT><URL><style face="normal" font="default" size="100%">https://doi.org/10.1007/978-3-319-59767-6_6</style></URL><title><style face="normal" font="default" size="100%">Application of Fault-Tolerant GQP Algorithm in Multihop AMI Networks</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>7</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Mateusz Nowak</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Piotr Pecka</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Sławomir Nowak</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">A Zgrzywa</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">K Choroś</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">A Siemiński</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Influence of message-oriented middleware on performance of network management system: a modelling study.</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2017</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Multimedia and Network Information Systems. </style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Springer</style></PUBLISHER><VOLUME><style face="normal" font="default" size="100%">Advances in Intelligent Systems and Computing, Vol. 506</style></VOLUME><PAGES><style face="normal" font="default" size="100%">379-393</style></PAGES><ISBN><style face="normal" font="default" size="100%">978-3-319-43981-5</style></ISBN><URL><style face="normal" font="default" size="100%">https://link.springer.com/chapter/10.1007%2F978-3-319-43982-2_33</style></URL><title><style face="normal" font="default" size="100%">Influence of message-oriented middleware on performance of network management system: a modelling study.</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Konrad Połys</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Michał Gorawski</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">LTE Load Balancing with Tx Power Adjustment and the Real Life Mobility Model</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2018</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Computer Networks</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Springer International Publishing</style></PUBLISHER><ISBN><style face="normal" font="default" size="100%">978-3-319-92459-5</style></ISBN><ABSTRACT><style face="normal" font="default" size="100%">&lt;p&gt;The load balancing in the LTE and LTE-A networks allows usage of the radio resources more effectively to improve client satisfaction. The paper provides analysis of the influence of complex user mobility patterns on the load balancing algorithm. The simulation models are used to evaluate the number of unsatisfied clients depending on the mobility model used. Two mobility models are used: RLMM and Random Waypoint. The Tx Power Adjustment method is evaluated, which is based on reconfiguration of a LTE eNodeB TX Power and was proposed by authors in their previous papers. Method proved to be effective and fairly easy in implementation, and the evaluation through series of simulation shown up to 50{%} rise in clients satisfaction with upholding the total network efficiency.&lt;/p&gt;&#13;
</style></ABSTRACT><title><style face="normal" font="default" size="100%">LTE Load Balancing with Tx Power Adjustment and the Real Life Mobility Model</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Konrad Połys</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Michał Gorawski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Artur Frankiewicz</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Accuracy of UWB Location Tracking Devices When on the Move</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2019</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">International Conference on Computer Networks</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Springer</style></PUBLISHER><VOLUME><style face="normal" font="default" size="100%">International Conference on Computer Networks</style></VOLUME><PAGES><style face="normal" font="default" size="100%">233-241</style></PAGES><DATE><style face="normal" font="default" size="100%">06/2019</style></DATE><title><style face="normal" font="default" size="100%">Accuracy of UWB Location Tracking Devices When on the Move</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Kamil Książek</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Aggregation of GPS, WLAN, and BLE Localization Measurements for Mobile Devices in Simulated Environments</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2019</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Sensors</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">19</style></VOLUME><DATE><style face="normal" font="default" size="100%">04/2019</style></DATE><ABSTRACT><style face="normal" font="default" size="100%">&lt;p&gt;There are multiple available technologies to find the location of a mobile device, such as the Global Positioning System (GPS), Bluetooth Low-Energy beacons (BLE), and Wireless LAN (WLAN) localization. We propose a novel method to estimate the location of a moving device by aggregating information from multiple positioning systems into a single, more precise location estimation. The aggregated location is calculated as the place in which the product of the probability density functions (PDF) of individual methods has the maximum value. The experimental probability density functions of the three analyzed technologies are fitted by gamma distributions based on error histograms found in the literature and measurement data. The location measurements of the individual technologies are provided at different time instants, so the weighted product of the PDFs is used to improve aggregation accuracy. The discrete event-simulation model was used to evaluate the aggregation method with the Gauss–Markov mobility model. Simulations demonstrated that the calculated aggregated location was more accurate than any of the methods taken as the input, and average error was decreased by almost 13% compared to an arithmetic mean of the three considered localization methods, and by more than 36% compared to the single method with the highest accuracy.&lt;/p&gt;&#13;
</style></ABSTRACT><URL><style face="normal" font="default" size="100%">https://www.mdpi.com/1424-8220/19/7/1694</style></URL><title><style face="normal" font="default" size="100%">Aggregation of GPS, WLAN, and BLE Localization Measurements for Mobile Devices in Simulated Environments</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>7</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Rafał Marjasz</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Anna Strzoda</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Zbigniew Łaskarzewski</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Simulation Analysis of Packet Delivery Probability in LoRa Networks.</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2019</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Communications in Computer and Information Science</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Springer, Cham</style></PUBLISHER><VOLUME><style face="normal" font="default" size="100%">1039</style></VOLUME><ISBN><style face="normal" font="default" size="100%">978-3-030-21951-2</style></ISBN><ABSTRACT><style face="normal" font="default" size="100%">&lt;p&gt;The LoRa communication standard allows to transmit data in radio networks over distances of few kilometers. Although the LoRa WAN protocol assumes the use of ALOHA channel access, due to the use of multiple channels and multiple spreading factors in LoRa networks the evaluation of collision probability is challenging. We present the simulation model allowing to estimate the per node probability of successful packet delivery ratio. The model is evaluated for different network topologies, based on random distribution of nodes or based on the real location of meters in sample smart city deployments. The results show that the packet delivery ratio varies significantly depending on the location of the end nodes in the network. Due to the higher spreading factor used, the collision probability is very low for nodes located near to the access point. The use of proposed simulation model allows to identify the nodes which experience high collision probability and react e.g. by reconfiguration.&lt;/p&gt;&#13;
</style></ABSTRACT><title><style face="normal" font="default" size="100%">Simulation Analysis of Packet Delivery Probability in LoRa Networks.</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Godlove Suila</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Piotr Czekalski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Ernest Molua</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">An Architectural Framework Proposal for IoT Driven Agriculture</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2019</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">International Conference on Computer Networks</style></SECONDARY_TITLE><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Kamień Śląski, Poland</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Springer</style></PUBLISHER><ISBN><style face="normal" font="default" size="100%">978-3-030-21951-2</style></ISBN><URL><style face="normal" font="default" size="100%">https://link.springer.com/chapter/10.1007/978-3-030-21952-9_2</style></URL><title><style face="normal" font="default" size="100%">An Architectural Framework Proposal for IoT Driven Agriculture</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Mariusz Słabicki</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Transmit power optimization in cellular networks with nomadic base stations</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2019</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">IET Communications</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">13</style></VOLUME><ISSUE><style face="normal" font="default" size="100%">18</style></ISSUE><SECTION><style face="normal" font="default" size="100%">3068</style></SECTION><DATE><style face="normal" font="default" size="100%"> 23 August 2019</style></DATE><ABSTRACT><style face="normal" font="default" size="100%">&lt;p&gt;The increasing demand for cellular network capacity can be mitigated through the installation of nomadic eNodeB, which serve a temporal increase of traffic volume in specific area. When nomadic cells are deployed, the transmission power of neighbour base stations needs to be optimised to limit the inter-cell interferences. The authors analyse the problem of neighbourhood selection for the optimisation, to define what part of the networks needs to be reconfigured when new base station is added. They evaluate the iterative approach, with increasing range of neighbouring cells being reconfigured and propose a novel, sampling-based local TX power reconfiguration method, which is evaluated by a numerical model in both regular (honeycomb) topology and in realistic topology reflecting locations of cells in a city. The analysis confirms that the proposed algorithm allows to select small subset of neighbouring cells to be reconfigured (in majority of the cases &lt;span style="font-size:0.87em"&gt; &lt;span style="font-size:120%"&gt;&lt;span style="font-family:mathjax_main"&gt;&lt;&lt;/span&gt;&lt;span style="font-family:mathjax_main"&gt;10&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span style="font-size:0.87em"&gt; &lt;/span&gt; cells), and achieve similar efficacy as global optimisation, with total network throughput different by &lt;span style="font-size:0.87em"&gt; &lt;span style="font-size:120%"&gt;&lt;span style="font-family:mathjax_main"&gt;&lt;&lt;/span&gt;&lt;span style="font-family:mathjax_main"&gt;1&lt;/span&gt;&lt;span style="font-family:mathjax_main"&gt;%&lt;/span&gt;&lt;/span&gt;&lt;/span&gt;&lt;span style="font-size:0.87em"&gt; &lt;/span&gt; comparing to the global optimisation.&lt;/p&gt;&#13;
</style></ABSTRACT><URL><style face="normal" font="default" size="100%">https://digital-library.theiet.org/content/journals/10.1049/iet-com.2019.0176</style></URL><title><style face="normal" font="default" size="100%">Transmit power optimization in cellular networks with nomadic base stations</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Michał Gorawski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Performance Tests of Smart City IoT Data Repositories for Universal Linear Infrastructure Data and Graph Databases</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2020</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">SN Computer Science</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">1</style></VOLUME><PAGES><style face="normal" font="default" size="100%">31</style></PAGES><title><style face="normal" font="default" size="100%">Performance Tests of Smart City IoT Data Repositories for Universal Linear Infrastructure Data and Graph Databases</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Diffusion Approximation Models for Cloud Computations with Task Migrations</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2019</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">2019 IEEE International Conference on Fog Computing (ICFC)</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">IEEE</style></PUBLISHER><URL><style face="normal" font="default" size="100%">https://ieeexplore.ieee.org/abstract/document/8821824</style></URL><title><style face="normal" font="default" size="100%">Diffusion Approximation Models for Cloud Computations with Task Migrations</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Rafał Marjasz</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Konrad Połys</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Anna Strzoda</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Kolizje pakietów w sieciach LoRa w zastosowaniach smart city</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2019</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Przegląd Telekomunikacyjny+ Wiadomości Telekomunikacyjne</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><title><style face="normal" font="default" size="100%">Kolizje pakietów w sieciach LoRa w zastosowaniach smart city</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Michał Gorawski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">"Graph Representation of Linear Infrastructure in Smart City IoT Systems</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2019</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">11th International Congress on Ultra Modern Telecommunications and Control Systems and Workshops (ICUMT) </style></SECONDARY_TITLE><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Dublin, Ireland</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">IEEE</style></PUBLISHER><DATE><style face="normal" font="default" size="100%">10.2019</style></DATE><ISBN><style face="normal" font="default" size="100%">978-1-7281-5763-4</style></ISBN><ABSTRACT><style face="normal" font="default" size="100%">&lt;p&gt;The cities infrastructure is being populated with a large number of Internet-connected devices used for monitoring and management to create a Smart City system. A large part of the city infrastructure has linear form, such as e.g. roads, energy or water distribution networks. In this paper, we present a solution for representation, processing and providing to external IT systems the data related to linear infrastructure. We present the idea of representation of such networks in a form of a multigraph that is stored in graph database and the graph generator which merges the data gathered from monitoring devices with network topology and other representative structures. We propose the architecture of a sample linear infrastructure management system based on multi-graph representation and discuss how it proposes a performance evaluation method based on data generation on the example of a district heating system.&lt;/p&gt;&#13;
</style></ABSTRACT><title><style face="normal" font="default" size="100%">"Graph Representation of Linear Infrastructure in Smart City IoT Systems</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Olumide Akinwande</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Erol Gelenbe</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Erol Gelenbe</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Ricardo Lent</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">A Reinforcement Learning Approach to Adaptive Forwarding in Named Data Networking</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2018</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Computer and Information Sciences - 32nd International Symposium, ISCIS 2018, Held at the 24th IFIP World Computer Congress, WCC 2018, Poznan, Poland, September 20-21, 2018, Proceedings</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Springer</style></PUBLISHER><URL><style face="normal" font="default" size="100%">https://doi.org/10.1007/978-3-030-00840-6_23</style></URL><title><style face="normal" font="default" size="100%">A Reinforcement Learning Approach to Adaptive Forwarding in Named Data Networking</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Erol Gelenbe</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Ricardo Lent</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Computer and Information Sciences - 32nd International Symposium, ISCIS 2018, Held at the 24th IFIP World Computer Congress, WCC 2018, Poznan, Poland, September 20-21, 2018, Proceedings</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2018</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Communications in Computer and Information Science</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Springer</style></PUBLISHER><VOLUME><style face="normal" font="default" size="100%">935</style></VOLUME><ISBN><style face="normal" font="default" size="100%">978-3-030-00839-0</style></ISBN><title><style face="normal" font="default" size="100%">Computer and Information Sciences - 32nd International Symposium, ISCIS 2018, Held at the 24th IFIP World Computer Congress, WCC 2018, Poznan, Poland, September 20-21, 2018, Proceedings</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Konrad Połys</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Heuristic Algorithm for Gateway Location Selection in Large Scale LoRa Networks</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2020</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">ACM International Wireless Communications and Mobile Computing Conference</style></SECONDARY_TITLE><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Cyprus</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><DATE><style face="normal" font="default" size="100%">07/2020</style></DATE><ABSTRACT><style face="normal" font="default" size="100%">&lt;p&gt;The LoRa networks allow building low-cost longrange networks. The selection of LoRa access point locations in large scale networks requires taking into consideration the spatial distribution of clients, radio signal propagation and the limitation of the number of devices served by a single point of access. We propose a heuristic algorithm for the selection of access point locations within for a given set of candidate locations, based on gradient optimization. The proposed method allows selecting a sub-optimal set of locations which provide full coverage and take into consideration the capacity dimensioning based on spreading factor and expected channel utilization. The algorithm is evaluated in random topologies and in reallife scenario based on city-wide smart meters locations. The analysis shows that it outperforms a manual selection of access points locations, allowing to decrease the number of access points providing the full coverage.&lt;/p&gt;&#13;
</style></ABSTRACT><URL><style face="normal" font="default" size="100%">https://ieeexplore.ieee.org/abstract/document/9148435</style></URL><title><style face="normal" font="default" size="100%">Heuristic Algorithm for Gateway Location Selection in Large Scale LoRa Networks</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Godlove Kuaban</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Ernest Molua</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Piotr Czekalski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">An Architectural Framework Proposal for IoT Driven Agriculture</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2019</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Computer Network 2019</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Springer, Cham</style></PUBLISHER><DATE><style face="normal" font="default" size="100%">June 2019</style></DATE><ISBN><style face="normal" font="default" size="100%">978-3-030-21951-2</style></ISBN><title><style face="normal" font="default" size="100%">An Architectural Framework Proposal for IoT Driven Agriculture</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Artur Frankiewicz</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Adam Glos</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Zbigniew Łaskarzewski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Jaroslaw Miszczak</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Konrad Połys</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Przemysław Sadowski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Anna Strzoda</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">LP WAN Gateway Location Selection Using Modified K-Dominating Set Algorithm</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2020</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Symposium on Modelling, Analysis, and Simulation of Computer and Telecommunication Systems</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Springer</style></PUBLISHER><DATE><style face="normal" font="default" size="100%">01/2021</style></DATE><ABSTRACT><style face="normal" font="default" size="100%">&lt;p&gt;The LP WAN networks use gateways or base stations to communicate with devices distributed on large distances, up&#160;to tens of kilometres. The selection of optimal gateway locations in wireless networks should allow providing the complete coverage for a given set of nodes, taking into account the limitations, such as the number of nodes served per access point or required redundancy. In this paper, we describe the problem of selecting the base stations in a network using the concept of &lt;em&gt;k&lt;/em&gt;-dominating set. In our model, we include information about the required redundancy and spectral efficiency. We consider the additional requirements on the resulting connections and provide the greedy algorithm for solving the problem. The algorithm is evaluated in randomly generated network topologies and using the coordinates of sample real smart metering networks.&lt;/p&gt;&#13;
</style></ABSTRACT><URL><style face="normal" font="default" size="100%">https://arxiv.org/abs/2010.04553</style></URL><title><style face="normal" font="default" size="100%">LP WAN Gateway Location Selection Using Modified K-Dominating Set Algorithm</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Michał Gorawski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Rafał Marjasz</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Artur Frankiewicz</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Energy Minimization Algorithm for Estimation of Clock Skew and Reception Window Selection in Wireless Networks</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2021</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Sensors</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">21</style></VOLUME><SECTION><style face="normal" font="default" size="100%">https://www.mdpi.com/</style></SECTION><DATE><style face="normal" font="default" size="100%">01/2021</style></DATE><ABSTRACT><style face="normal" font="default" size="100%">&lt;p&gt;The synchronization of time between devices is one of the more important and challenging problems in wireless networks. We discuss the problem of maximization of the probability of receiving a message from a device using a limited listening time window to minimize energy utilization. We propose a solution to two important problems in wireless networks of battery-powered devices: a method of establishing a connection with a device that has been disconnected from the system for a long time and developed unknown skew and also two approaches to follow-up clock synchronization using the confidence interval method. We start with the analysis of measurements of clock skew. The algorithms are evaluated using extensive simulations and we discuss the selection of parameters balancing between minimizing the energy utilization and maximizing the probability of reception of the message. We show that the selection of a time window of growing size requires less energy to receive a packet than using the same size of time window repeated multiple times. The shifting of reception windows can further decrease the energy cost if lower packet reception probability is acceptable. We also propose and evaluate an algorithm scaling the reception window size to the interval between the packet transmission&lt;/p&gt;&#13;
</style></ABSTRACT><URL><style face="normal" font="default" size="100%">https://www.mdpi.com/1424-8220/21/5/1768</style></URL><title><style face="normal" font="default" size="100%">Energy Minimization Algorithm for Estimation of Clock Skew and Reception Window Selection in Wireless Networks</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Kamil Książek</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Flexibility Analysis of Adaptive Data Rate Algorithm in LoRa Networks</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2021</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%"/></SECONDARY_TITLE><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Harbin, China</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">IEEE</style></PUBLISHER><title><style face="normal" font="default" size="100%">Flexibility Analysis of Adaptive Data Rate Algorithm in LoRa Networks</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Rafał Marjasz</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Anna Strzoda</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Konrad Połys</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Mitigation of LoRa interferences via dynamic channel weights</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2021</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">European Simulation and Modelling Conference (formelly European Simulation Multiconference) - ESM </style></SECONDARY_TITLE><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Rome</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Eurosis</style></PUBLISHER><PAGES><style face="normal" font="default" size="100%">150-154</style></PAGES><DATE><style face="normal" font="default" size="100%">10/2021</style></DATE><ABSTRACT><style face="normal" font="default" size="100%">&lt;p&gt;The Low Power Wide Area Networks, such as LoRa (Long Range), allow communication over a large area with limited bandwidth and small data rates, using an unlicensed band. LoRa uses multiple channels, but the number of channels available is relatively narrow - e.g. 8 in most countries in Europe. The transmission is subject to interferences due to many other devices transmitting within the same frequencies. In this paper, we evaluate how strong the interferences' influence is by analysing the packet delivery rate in a large scale LoRa network. The measurements have been made over more than seven months and show noticeable variability in packet delivery rate per channel both in space and in time. We propose to estimate the scale of interferences through continuous observation of the number of delivered packets for every channel per LoRa gateway or per selected area. We also discuss how this estimation may mitigate the interferences by assigning the dynamic weights to the LoRa channel selection procedure. We created an algorithm that periodically updates the weights, and a simulation model to evaluate the algorithm. A significant improvement in the efficiency of package delivery is visible, from 12% to 49% less packet loss.&lt;/p&gt;&#13;
</style></ABSTRACT><URL><style face="normal" font="default" size="100%">https://www.researchgate.net/publication/356041519_Mitigation_of_LORA_Interferences_via_Dynamic_Channel_Weights</style></URL><title><style face="normal" font="default" size="100%">Mitigation of LoRa interferences via dynamic channel weights</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Rafał Marjasz</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Konrad Połys</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Anna Strzoda</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Improving Delivery Ratio in LoRa Network</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2021</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Proceedings of the 19th ACM International Symposium on Mobility Management and Wireless Access</style></SECONDARY_TITLE><PLACE_PUBLISHED><style face="normal" font="default" size="100%">New York, NY, USA</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Association for Computing Machinery</style></PUBLISHER><ISBN><style face="normal" font="default" size="100%">9781450390798</style></ISBN><ABSTRACT><style face="normal" font="default" size="100%">&lt;p&gt;The LoRa (Long Range) radio communication provides large coverage areas, low bandwidth, small data rates, and transmitting limited data sizes, with very low energy usage. Multiple transmission channels are used, but the number of channels available is fairly limited - e.g. 8 in most countries in Europe. The amount of interferences may be estimated by the continuous observation of the number of delivered packets and the received signal strength. We propose to aggregate and analyse those metrics per channel and geographical area. When the proportion of received packets per some of the areas decreases, it is subjected to heavier interferences than other parts of the network and should be used less intensively. Thus we propose to allocate the weights for each channel per geographic area and/or device, defining the probability of the channel usage. Furthermore, we created an algorithm that periodically updates the weights and a simulation model using OMNeT++, FloRa, taking into account possible packets collisions. The algorithm has been validated for both random and realistic network topologies. The simulation evaluations show a significant improvement in the package delivery efficiency, by almost 50% in scenarios with very high interference level simulated and by more than 13% in scenarios fed with real-life measurements of packet delivery probability changes in time.&lt;/p&gt;&#13;
</style></ABSTRACT><URL><style face="normal" font="default" size="100%">https://dl.acm.org/doi/10.1145/3479241.3486698?cid=99659913397</style></URL><title><style face="normal" font="default" size="100%">Improving Delivery Ratio in LoRa Network</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Daniel Marek</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Jakub Duda</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Channel State Information Variability in BLE Positioning Measurements</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2021</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">International Conference On Systems Engineering</style></SECONDARY_TITLE><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Wrocla</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Springer International Publishing</style></PUBLISHER><DATE><style face="normal" font="default" size="100%">12/2021</style></DATE><ISBN><style face="normal" font="default" size="100%">978-3-030-92604-5</style></ISBN><ABSTRACT><style face="normal" font="default" size="100%">&lt;p&gt;The Bluetooth Low Energy beacon messages are used in indoor positioning systems (IPS) to estimate the distance between the wireless devices. Recent work shows that channel state information and separate measurements for each of the three channels may increase the accuracy of the IPS, especially using the fingerprinting method. We perform a set of measurements presenting RSSI variability per channel in stationary measurements and with a variation of angle between the beacon and the receiver. The estimated standard deviation of the RSSI (received signal strength index) is minimal (less than one dBm) for stationary transmission. However, our measurements show that if the angle is not constant, the signal level of beacons received on different channels changes by up&#160;to 8 dBm, and the channel state is not a reliable source of information for distance estimation. We show that since mobile phones antennas are not perfectly omnidirectional and the multipath fading significantly changes even with a slight turn of the receiver, the channel state information in the BLE positioning system has limited applicability in real-life conditions.&lt;/p&gt;&#13;
</style></ABSTRACT><URL><style face="normal" font="default" size="100%">https://link.springer.com/chapter/10.1007/978-3-030-92604-5_26</style></URL><title><style face="normal" font="default" size="100%">Channel State Information Variability in BLE Positioning Measurements</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Aleksander Byrski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Erol Gelenbe</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Yuko Murayama</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Computer Science Protecting Human Society Against Epidemics</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2021</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">ANTICOVID 2021</style></SECONDARY_TITLE><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Virtual Event, June 28–29, 2021</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Springer</style></PUBLISHER><VOLUME><style face="normal" font="default" size="100%">616</style></VOLUME><NUMBER><style face="normal" font="default" size="100%">616</style></NUMBER><PAGES><style face="normal" font="default" size="100%">125</style></PAGES><TERTIARY_TITLE><style face="normal" font="default" size="100%">IFIP Advances in Information and Communication Technology</style></TERTIARY_TITLE><ISBN><style face="normal" font="default" size="100%">978-3-030-86582-5</style></ISBN><title><style face="normal" font="default" size="100%">Computer Science Protecting Human Society Against Epidemics</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Anna Strzoda</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Rafał Marjasz</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Przemysław Głomb</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Kamil Książek</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Zbigniew Łaskarzewski</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Energy-Aware Algorithm for Assignment of Relays in LPWAN</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2022</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Transactions on Sensor Networks</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">18</style></VOLUME><ISSUE><style face="normal" font="default" size="100%">4</style></ISSUE><SECTION><style face="normal" font="default" size="100%">Article No. 60</style></SECTION><DATE><style face="normal" font="default" size="100%">11/2022</style></DATE><ABSTRACT><style face="normal" font="default" size="100%">&lt;p&gt;The Low Power Wide Area Networks allow maintaining connectivity with devices over a distance of a few kilometres. However, due&lt;br /&gt;&#13;
to the presence of obstacles the communication range in an urban environment may be shorter, which creates multiple blind spots or&lt;br /&gt;&#13;
areas with limited coverage. The nodes acting as relays may solve this problem by forwarding the data from other devices with poor&lt;br /&gt;&#13;
connectivity. We propose and investigate a novel algorithm that assigns devices to the relay role while keeping the battery constraints.&lt;br /&gt;&#13;
We define the algorithm, describe the simulation testbed, and present performance evaluation in several scenarios, including real-life&lt;br /&gt;&#13;
topologies of IoT networks. The proposed relay selection scheme allows increasing the lifetime of the network by selecting the relay&lt;br /&gt;&#13;
taking into account the current battery capacity. Additionally, it outperforms a previously proposed relay selection algorithm for LP&lt;br /&gt;&#13;
WAN, showing an average 4% decrease in transmission time and an order of magnitude lower computation complexity.&lt;/p&gt;&#13;
</style></ABSTRACT><URL><style face="normal" font="default" size="100%">https://dl.acm.org/doi/10.1145/3544561?cid=99659913397</style></URL><title><style face="normal" font="default" size="100%">Energy-Aware Algorithm for Assignment of Relays in LPWAN</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Anna Strzoda</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Artur Frankiewicz</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Zbigniew Łaskarzewski</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Measurements and Analysis of Large Scale LoRa Network Efficiency</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2022</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">International Wireless Communications and Mobile Computing Conference, IWCMC </style></SECONDARY_TITLE><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Dubrovnik, Croatia</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">IEEE</style></PUBLISHER><URL><style face="normal" font="default" size="100%">https://ieeexplore.ieee.org/document/9824317</style></URL><title><style face="normal" font="default" size="100%">Measurements and Analysis of Large Scale LoRa Network Efficiency</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Viacheslav Kovtun</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Oksana Kovtun</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Oleh Yasniy</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">The quality of service assessment of eMBB and mMTC traffic in a clustered 5G ecosystem of a smart factory</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2025</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Egyptian Informatics Journal</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">29</style></VOLUME><URL><style face="normal" font="default" size="100%">https://www.sciencedirect.com/science/article/pii/S1110866524001610</style></URL><title><style face="normal" font="default" size="100%">The quality of service assessment of eMBB and mMTC traffic in a clustered 5G ecosystem of a smart factory</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Anna Strzoda</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Konrad Połys</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Variability of BLE Advertisement Packets Received Signal Strength and Delivery Probability in the Presence of Interferences</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2022</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">ACM MSWIM 22 - The 25th International Conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems, DIVANET Symposium</style></SECONDARY_TITLE><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Montreal, Canada</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Association for Computing Machinery</style></PUBLISHER><DATE><style face="normal" font="default" size="100%">10/2022</style></DATE><ISBN><style face="normal" font="default" size="100%">9781450394826</style></ISBN><ABSTRACT><style face="normal" font="default" size="100%">&lt;p&gt;The Bluetooth Low Energy (BLE) advertisement messages allow estimating the location and distance between mobile devices. We analyse how the signal level varies depending on interferences, distance and the orientation of the transmitting and receiving devices. To provide a representative BLE Received Signal Strength Index (RSSI) dataset, we present a series of experimental measurements, including different receiver antenna orientations for several distances. We analyse the signal level variability as a function of distance and angle in an indoor environment. Our measurements show that the mean RSSI value equals -65.5 dBm, -78.4 dBm, -84.1 dBm and -90.8 dBm for 1m, 5m, 10m, and 16m, respectively. The standard deviation changes from 5.7 dBm through 5.9 dBm, 4.5 dBm to 3.5 dBm for 1m, 5m, 10m, and 16m, respectively. We also investigate the influence of the interference, emulating environment in which devices actively transmit BLE signals with varying intensities; on average, at every 0ms (no additional signals), 4ms and 8ms. The experiments show that from 13% to 40% fewer packets are delivered per second in the presence of interferences. Nevertheless, the RSSI characteristics remain very similar regardless of the presence of emulated traffic or not.&lt;/p&gt;&#13;
</style></ABSTRACT><URL><style face="normal" font="default" size="100%">https://dl.acm.org/doi/abs/10.1145/3551662.3560933</style></URL><title><style face="normal" font="default" size="100%">Variability of BLE Advertisement Packets Received Signal Strength and Delivery Probability in the Presence of Interferences</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Anna Strzoda</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Rafał Marjasz</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">How Accurate is LoRa Positioning in Realistic Conditions?</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2022</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">ACM MSWIM 22 - The 25th International Conference on Modeling, Analysis and Simulation of Wireless and Mobile Systems, DIVANET Symposium</style></SECONDARY_TITLE><PLACE_PUBLISHED><style face="normal" font="default" size="100%">New York, NY, USA</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Association for Computing Machinery</style></PUBLISHER><DATE><style face="normal" font="default" size="100%">10/2022</style></DATE><ISBN><style face="normal" font="default" size="100%">9781450394826</style></ISBN><ABSTRACT><style face="normal" font="default" size="100%">&lt;p&gt;The LoRa communication technology has been developed for data transmission, but recent research papers showed that it could also be used to estimate the transmitting devices' location. The location can be found with reasonable accuracy, with median error as low as tens of meters; however, in many cases, it is evaluated in very optimistic transmission conditions, e.g. using line-of-sight communication and on a small data set. We estimate how LoRa localization performs in a realistic scenario, using an extensive data set of a telemetric network of a few thousand devices to calculate the location using the trilateration and estimate the error of the calculation. Within the analysed dataset the true-range multilateration provides highly inaccurate location estimation, with a median error of 588.64 m and an average error of 808.57 m. We argue that the LoRa localization in real-life conditions is ineffective, as the estimation of the distance between the node and the gateway changes heavily depending on the location of the node and radio channel attenuation.&lt;/p&gt;&#13;
</style></ABSTRACT><URL><style face="normal" font="default" size="100%">https://dl.acm.org/doi/10.1145/3551662.3561260?cid=99659913397</style></URL><title><style face="normal" font="default" size="100%">How Accurate is LoRa Positioning in Realistic Conditions?</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Anna Strzoda</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Rafał Marjasz</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">LoRa Positioning in Verification of Location Data's Credibility</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2022</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Symposium on Modelling, Analysis, and Simulation of Computer and Telecommunication Systems</style></SECONDARY_TITLE><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Nice, France</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Infocommunications Journal</style></PUBLISHER><DATE><style face="normal" font="default" size="100%">12/2022</style></DATE><ABSTRACT><style face="normal" font="default" size="100%">&lt;p&gt;The LoRa is a novel radio communication technology&lt;br /&gt;&#13;
providing low power and a high range of data transmission.&lt;br /&gt;&#13;
The LoRa transmission may be used for a low-cost localization&lt;br /&gt;&#13;
to estimate the network nodes’ location. Some recent research&lt;br /&gt;&#13;
showed that the location could be found with reasonable accuracy,&lt;br /&gt;&#13;
with median error as low as tens of meters. Still, such results are&lt;br /&gt;&#13;
achieved in a controlled environment with low interferences. We&lt;br /&gt;&#13;
first evaluate the LoRa localization using an extensive data set&lt;br /&gt;&#13;
of a telemetric network of a few thousand devices. We show that&lt;br /&gt;&#13;
although the direct positioning based on trilateration provides&lt;br /&gt;&#13;
limited accuracy, the measurement of LoRa transmission may&lt;br /&gt;&#13;
be successfully used to evaluate the credibility of location information.&lt;br /&gt;&#13;
The information about which gateways received the data&lt;br /&gt;&#13;
and the RSSI measurements allow us to verify if the potential&lt;br /&gt;&#13;
coordinates of a location are accurate. We propose a metric for&lt;br /&gt;&#13;
location verification and estimate its credibility on a sample of&lt;br /&gt;&#13;
measurements from the LoRa telemetry network.&lt;/p&gt;&#13;
</style></ABSTRACT><URL><style face="normal" font="default" size="100%">https://www.infocommunications.hu/2022_4_8</style></URL><title><style face="normal" font="default" size="100%">LoRa Positioning in Verification of Location Data's Credibility</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>10</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Alpen Yegin</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Olivier Seller</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Davide Orifiamma</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Xiaobo Yu</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Brince Thanh</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Dominique Barthel</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Christopher Buffard</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Inma Carrion</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Loïc Ferreira</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Michael Grudsky</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Ahmed Kasttet</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Michael Kirwan</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Dave Kjendal</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Miguel Luis</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Baozhu Ning</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">LoRaWAN® Relay Specification  TS011-1.0.0</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2022</style></YEAR><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><URL><style face="normal" font="default" size="100%">https://resources.lora-alliance.org/home/ts011-1-0-0-relay</style></URL><title><style face="normal" font="default" size="100%">LoRaWAN® Relay Specification  TS011-1.0.0</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Anna Strzoda</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Przemysław Głomb</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Andrzej Madej</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Link failure prediction in LoRa networks</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2023</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%"> International Wireless Communications and Mobile Computing Conference, IWCMC</style></SECONDARY_TITLE><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Marrakesh, Morocco</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">IEEE</style></PUBLISHER><DATE><style face="normal" font="default" size="100%">07/2023</style></DATE><title><style face="normal" font="default" size="100%">Link failure prediction in LoRa networks</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Sławomir Nowak</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Mariusz Słabicki</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Michał Gorawski</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Efficient Universal Indoor Multicharacteristic Propagation model for indoor environments</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2023</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">2023 International Wireless Communications and Mobile Computing (IWCMC)</style></SECONDARY_TITLE><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Marrakesh, Morocco</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">IEEE</style></PUBLISHER><PAGES><style face="normal" font="default" size="100%">1052-1058</style></PAGES><DATE><style face="normal" font="default" size="100%">07/2023</style></DATE><ABSTRACT><style face="normal" font="default" size="100%">&lt;p&gt;Accurate indoor radio propagation modelling is a well-known problem that researchers tend to solve in many ways. Related methods differ in terms of accuracy and complexity. The article’s contribution is a new stochastic propagation model, Universal Indoor Multicharacteristic Propagation (UIMP), which results are statistically consistent with those measured in a real environment. The model could be used to verify real- world applications due to the low computational complexity and high accuracy level compared to state-of-the-art methods. This method can be especially beneficial for the efficient modelling of complex environments shared by many users using discrete events simulations (DES) based on a series of measurements in a real environment. In the article, we describe the method and present how to establish the model. The motivation was to develop an efficient method for use in an actual application: using the Bluetooth Low Energy (BLE) signal to estimate the position of users in indoor environments – the use of the proposed UIMP model allowed for a reliable assessment of the developed functionalities. Therefore we also present how the model was used to evaluate an example, real functionality, showing that the use of simplified models may falsify the assessment of the analyzed method and may lead e.g. to incorrect implementation assumptions.&lt;/p&gt;&#13;
</style></ABSTRACT><URL><style face="normal" font="default" size="100%">https://ieeexplore.ieee.org/document/10183073</style></URL><title><style face="normal" font="default" size="100%">Efficient Universal Indoor Multicharacteristic Propagation model for indoor environments</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Viacheslav Kovtun</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Konrad Połys</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Investigation of the Information Interaction of the Sensor Network end IoT Device and the Hub at the Transport Protocol Level</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2023</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">MDPI Electronics</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">12</style></VOLUME><ISSUE><style face="normal" font="default" size="100%">22</style></ISSUE><DATE><style face="normal" font="default" size="100%">11/2023</style></DATE><URL><style face="normal" font="default" size="100%">https://www.mdpi.com/2079-9292/12/22/4662</style></URL><title><style face="normal" font="default" size="100%">Investigation of the Information Interaction of the Sensor Network end IoT Device and the Hub at the Transport Protocol Level</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Viacheslav Kovtun</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Elena Zaitseva</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Vitaly Levashenko</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Oksana Kovtun</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Small Stochastic Data Compactification Concept Justified in the Entropy Basis</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2023</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Entropy</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">25</style></VOLUME><ISSUE><style face="normal" font="default" size="100%">12</style></ISSUE><SECTION><style face="normal" font="default" size="100%">1567</style></SECTION><DATE><style face="normal" font="default" size="100%">21 November 2023</style></DATE><URL><style face="normal" font="default" size="100%">https://www.mdpi.com/1099-4300/25/12/1567</style></URL><title><style face="normal" font="default" size="100%">Small Stochastic Data Compactification Concept Justified in the Entropy Basis</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Viacheslav Kovtun</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Wojciech Kempa</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Konrad Połys</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Reliably Controlling Massive Traffic between a Sensor Network End Internet of Things Device Environment and a Hub Using Transmission Control Protocol Mechanisms</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2023</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">MDPI Electronics</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">12</style></VOLUME><ISSUE><style face="normal" font="default" size="100%">24</style></ISSUE><DATE><style face="normal" font="default" size="100%">12/2023</style></DATE><URL><style face="normal" font="default" size="100%">https://www.mdpi.com/2079-9292/12/24/4920</style></URL><title><style face="normal" font="default" size="100%">Reliably Controlling Massive Traffic between a Sensor Network End Internet of Things Device Environment and a Hub Using Transmission Control Protocol Mechanisms</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Viacheslav Kovtun</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Torki Altameem</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Mohammed Al-Maitah</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Evaluation of the QoS policy model of an ordinary 5G smart city cluster with predominant URLLC and eMBB traffic</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2023</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">PLOS ONE</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><DATE><style face="normal" font="default" size="100%">12/2023</style></DATE><URL><style face="normal" font="default" size="100%">https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0295252</style></URL><title><style face="normal" font="default" size="100%">Evaluation of the QoS policy model of an ordinary 5G smart city cluster with predominant URLLC and eMBB traffic</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Viacheslav Kovtun</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Viacheslav Kharchenko</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Mohd Haq</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Andiy Semenov</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Stochastic forecasting of variable small data as a basis for analyzing an early stage of a cyber epidemic</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2023</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Scientific Reports</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">13</style></VOLUME><SECTION><style face="normal" font="default" size="100%">22810</style></SECTION><DATE><style face="normal" font="default" size="100%">12/2023</style></DATE><URL><style face="normal" font="default" size="100%">https://www.nature.com/articles/s41598-023-49007-2#citeas</style></URL><title><style face="normal" font="default" size="100%">Stochastic forecasting of variable small data as a basis for analyzing an early stage of a cyber epidemic</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Anna Strzoda</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">A Nature-Inspired Approach to Energy-Efficient Relay Selection in Low Power Wide Area Networks (LPWAN)</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2024</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">MDPI Sensors</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">24</style></VOLUME><ISSUE><style face="normal" font="default" size="100%">11</style></ISSUE><DATE><style face="normal" font="default" size="100%">05/2024</style></DATE><ABSTRACT><style face="normal" font="default" size="100%">&lt;p&gt;Despite the ability of Low-Power Wide-Area Networks to offer extended range, they encounter challenges with coverage blind spots in the network. This article proposes an innovative energy-efficient and nature-inspired relay selection algorithm for LoRa-based LPWAN networks, serving as a solution for challenges related to poor signal range in areas with limited coverage. A swarm behavior-inspired approach is utilized to select the relays’ localization in the network, providing network energy efficiency and radio signal extension. These relays help to bridge communication gaps, significantly reducing the impact of coverage blind spots by forwarding signals from devices with poor direct connectivity with the gateway. The proposed algorithm considers critical factors for the LoRa standard, such as the Spreading Factor and device energy budget analysis. Simulation experiments validate the proposed scheme’s effectiveness in terms of energy efficiency under diverse multi-gateway (up to six gateways) network topology scenarios involving thousands of devices (1000–1500). Specifically, it is verified that the proposed approach outperforms a reference method in preventing battery depletion of the relays, which is vital for battery-powered IoT devices. Furthermore, the proposed heuristic method achieves over twice the speed of the exact method for some large-scale problems, with a negligible accuracy loss of less than 2%.&lt;/p&gt;&#13;
</style></ABSTRACT><URL><style face="normal" font="default" size="100%">https://www.mdpi.com/1424-8220/24/11/3348</style></URL><title><style face="normal" font="default" size="100%">A Nature-Inspired Approach to Energy-Efficient Relay Selection in Low Power Wide Area Networks (LPWAN)</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Viacheslav Kovtun</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Konrad Połys</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">The concept of network resource control of a 5G cluster focused on the smart city's critical infrastructure needs</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2024</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Alexandria Engineering Journal</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">94</style></VOLUME><SECTION><style face="normal" font="default" size="100%">248</style></SECTION><DATE><style face="normal" font="default" size="100%">5/2024</style></DATE><URL><style face="normal" font="default" size="100%">https://www.sciencedirect.com/science/article/pii/S1110016824002825</style></URL><title><style face="normal" font="default" size="100%">The concept of network resource control of a 5G cluster focused on the smart city's critical infrastructure needs</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Viacheslav Kovtun</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Oksana Kovtun</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Konrad Połys</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Assessment of Communication Resource Allocation by the Transmission Control Protocol for the Target Virtual Connection under Competitive Conditions</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2024</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Electronics</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">13</style></VOLUME><ISSUE><style face="normal" font="default" size="100%">7</style></ISSUE><SECTION><style face="normal" font="default" size="100%">1180</style></SECTION><DATE><style face="normal" font="default" size="100%">3/2024</style></DATE><URL><style face="normal" font="default" size="100%">https://www.mdpi.com/2079-9292/13/7/1180/pdf</style></URL><title><style face="normal" font="default" size="100%">Assessment of Communication Resource Allocation by the Transmission Control Protocol for the Target Virtual Connection under Competitive Conditions</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Michał Gorawski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Rafał Marjasz</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Artur Frankiewicz</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Comparative Analysis of Energy Consumption in Simulated LoRa Water Meter Reconfiguration vs. Real-world Readings</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2024</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">IFIP Networking</style></SECONDARY_TITLE><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Thessaloniki</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">IEEE</style></PUBLISHER><DATE><style face="normal" font="default" size="100%">08/2024</style></DATE><ABSTRACT><style face="normal" font="default" size="100%">&lt;p&gt;Detecting water leaks in distribution networks is crucial for conserving resources and preventing infrastructure damage. However, one of the most basic and significant challenges before employing any leak detection method is collecting data from the water distribution network. The sensors used for data collection are usually battery-powered; thus, the energy consumption of these devices is an essential factor. In this paper, we analyze the battery consumption of real devices placed in an operational water distribution network, and based on the obtained data, we perform a series of complex simulations to validate the preliminary assumptions we plan to use in further research of leak detection methods.&lt;/p&gt;&#13;
</style></ABSTRACT><URL><style face="normal" font="default" size="100%">https://ieeexplore.ieee.org/document/10619861</style></URL><title><style face="normal" font="default" size="100%">Comparative Analysis of Energy Consumption in Simulated LoRa Water Meter Reconfiguration vs. Real-world Readings</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Rafał Marjasz</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Konrad Połys</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">A Comprehensive Algorithm for Vertical Positioning in Multi-Building Environments as an Advancement in Indoor Floor-Level Detection</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2024</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Scientific Reports</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">14</style></VOLUME><ISSUE><style face="normal" font="default" size="100%">14034</style></ISSUE><SECTION><style face="normal" font="default" size="100%">1</style></SECTION><DATE><style face="normal" font="default" size="100%">06/2024</style></DATE><ABSTRACT><style face="normal" font="default" size="100%">&lt;p&gt;The proliferation of smartphones has catalyzed diverse services, mainly focusing on indoor localization to determine users’ and devices’ positions within buildings. Despite decades of exploration, the seamless integration of wireless technologies in tracking devices and users has become pivotal in various sectors, including health, industry, disaster management, building operations, and surveillance. Extensive research in laboratory and industrial settings, particularly in wireless sensor networks and robotics, has informed indoor localization techniques. This paper, referencing surveys and original literature reviews, proposes an innovative indoor location system amalgamating GPS and barometer readings. GPS identifies entry through doors, while barometer readings facilitate accurate floor-level tracking. The integration promises continuous real-time location updates, enhancing security, navigation, and emergency response. Notably, the algorithm is infrastructure-independent, relying on the smartphone’s barometer, and versatile, detecting elevator travel when Wi-Fi AP or LTE signals are available. Results indicate high accuracy, with building entry exceeding 93%, elevator recognition achieving 75% sensitivity and 97% specificity, and floor change detection surpassing 95% sensitivity and nearly 98% specificity (which translates to nearly 97% accuracy). This comprehensive solution, emphasizing the critical role of precise vertical positioning, signifies an advancement in tracking within urban structures.&lt;/p&gt;&#13;
</style></ABSTRACT><URL><style face="normal" font="default" size="100%">https://www.nature.com/articles/s41598-024-64824-9</style></URL><title><style face="normal" font="default" size="100%">A Comprehensive Algorithm for Vertical Positioning in Multi-Building Environments as an Advancement in Indoor Floor-Level Detection</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Michał Gorawski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Rafał Marjasz</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Performance evaluation of the secure multi-tenancy system for smart city IoT environment using open LDAP and Apache Kafka.</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2024</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">22nd International Industrial Simulation Conference</style></SECONDARY_TITLE><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Valencia, Spain</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">EUROSIS-ETI</style></PUBLISHER><DATE><style face="normal" font="default" size="100%">06/2024</style></DATE><ISBN><style face="normal" font="default" size="100%">978-9-492859-30-3</style></ISBN><ABSTRACT><style face="normal" font="default" size="100%">&lt;p&gt;Supporting multiple users and operators in a single IoT system is vital for large-scale commercial deployments. This involves servicing numerous network operators with one IT system and set of devices, ensuring each operator can manage, reconfigure, and change device settings securely. This paper evaluates a multi-tenancy solution in our test system (TS), utilizing Apache Kafka as a message broker and OpenLDAP as an authorizer. It describes the system design, methods to ensure data separation, security and results of performance evaluation in simulation.&lt;/p&gt;&#13;
</style></ABSTRACT><title><style face="normal" font="default" size="100%">Performance evaluation of the secure multi-tenancy system for smart city IoT environment using open LDAP and Apache Kafka.</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Viacheslav Kovtun</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Saad Aldosary</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Mohammed Al-Maitah</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Analysis of direct traffic at the transport protocol level in the WiMax-1/2 cluster oriented to offload the smart city's wireless ecosystem</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2024</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Royal Society Open Science</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">11</style></VOLUME><ISSUE><style face="normal" font="default" size="100%">7</style></ISSUE><SECTION><style face="normal" font="default" size="100%">240206</style></SECTION><URL><style face="normal" font="default" size="100%">https://royalsocietypublishing.org/doi/10.1098/rsos.240206</style></URL><title><style face="normal" font="default" size="100%">Analysis of direct traffic at the transport protocol level in the WiMax-1/2 cluster oriented to offload the smart city's wireless ecosystem</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Zbigniew Łaskarzewski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Efektywność Schematu Komunikacyjnego Liczników Mediów w Procesie Zdalnego Odczytu Obchodzonego</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2024</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Konferencja Radiokomunikacji i Teleinformatyki</style></SECONDARY_TITLE><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Poznań</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">SIGMA-NOT</style></PUBLISHER><DATE><style face="normal" font="default" size="100%">09/2024</style></DATE><ABSTRACT><style face="normal" font="default" size="100%">&lt;p&gt;Liczniki mediów coraz częściej wyposażane są w możliwość zdalnego odczytu wskazań. Jest on realizowany w modelu stacjonarnym lub obchodzonym. W modelu ob- chodzonym najpopularniejszym schematem komunikacji jest periodyczne nadawanie ramek pomiarowych, jednak jak pokazuje analiza w niniejszej pracy, schemat komunika- cji oparty na energooszczędnym nasłuchu (próbkowaniu preambuły) jest bardziej energooszczędny, a także wymaga mniej czasu na realizację transmisji. Wskazane także zostały parametry mające wpływ na wybór schematu komunikacji.&lt;/p&gt;&#13;
</style></ABSTRACT><URL><style face="normal" font="default" size="100%">https://sigma-not.pl/publikacja-150436-efektywno%C5%9B%C4%87-schematu-komunikacji-licznik%C3%B3w-medi%C3%B3w-w-procesie-zdalnego-odczytu-obchodzonego-przeglad-telekomunikacyjny-2024-4.html</style></URL><title><style face="normal" font="default" size="100%">Efektywność Schematu Komunikacyjnego Liczników Mediów w Procesie Zdalnego Odczytu Obchodzonego</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Viacheslav Kovtun</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Mohammed Al-Maitah</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Saad Aldosary</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Tetiana Gryshchuk</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Cyber epidemic spread forecasting based on the entropy-extremal dynamic interpretation of the SIR model</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2024</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Egyptian Informatics Journal</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">28</style></VOLUME><DATE><style face="normal" font="default" size="100%">12/2024</style></DATE><URL><style face="normal" font="default" size="100%"/></URL><title><style face="normal" font="default" size="100%">Cyber epidemic spread forecasting based on the entropy-extremal dynamic interpretation of the SIR model</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Viacheslav Kovtun</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Mohammed Al-Maitah</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Saad Aldosary</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Wojciech Kempa</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Entropy-extreme model for predicting the development of cyber epidemics at early stages</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2024</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Computational and Structural Biotechnology Journal</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">24</style></VOLUME><SECTION><style face="normal" font="default" size="100%">593</style></SECTION><DATE><style face="normal" font="default" size="100%">12/2024</style></DATE><ABSTRACT><style face="normal" font="default" size="100%">&lt;p&gt;The approaches used in biomedicine to analyze epidemics take into account features such as exponential growth in the early stages, slowdown in dynamics upon saturation, time delays in spread, segmented spread, evolutionary adaptations of the pathogen, and preventive measures based on universal communication protocols. All these characteristics are also present in modern cyber epidemics. Therefore, adapting effective biomedical approaches to epidemic analysis for the investigation of the development of cyber epidemics is a promising scientific research task. The article is dedicated to researching the problem of predicting the development of cyber epidemics at early stages. In such conditions, the available data is scarce, incomplete, and distorted. This situation makes it impossible to use artificial intelligence models for prediction. Therefore, the authors propose an entropy-extreme model, defined within the machine learning paradigm, to address this problem. The model is based on estimating the probability distributions of its controllable parameters from input data, taking into account the variability characteristic of the last ones. The entropy-extreme instance, identified from a set of such distributions, indicates the most uncertain (most negative) trajectory of the investigated process. Numerical methods are used to analyze the generated set of investigated process development trajectories based on the assessments of probability distributions of the controllable parameters and the variability characteristic. The result of the analysis includes characteristic predictive trajectories such as the average and median trajectories from the set, as well as the trajectory corresponding to the standard deviation area of the parameters’ values. Experiments with real data on the infection of Windows-operated devices by various categories of malware showed that the proposed model outperforms the classical competitor (least squares method) in predicting the development of cyber epidemics near the extremum of the time series representing the deployment of such a process over time. Moreover, the proposed model can be applied without any prior hypotheses regarding the probabilistic properties of the available data.&lt;/p&gt;&#13;
</style></ABSTRACT><URL><style face="normal" font="default" size="100%">https://www.sciencedirect.com/science/article/pii/S2001037024002770</style></URL><title><style face="normal" font="default" size="100%">Entropy-extreme model for predicting the development of cyber epidemics at early stages</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Viacheslav Kovtun</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Elena Zaitseva</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Vitaly Levashenko</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">The concept of effective coverage radius use of the unlicensed high-frequency range in the operation of the 5G network</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2024</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Heliyon</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">10</style></VOLUME><ISSUE><style face="normal" font="default" size="100%">21</style></ISSUE><DATE><style face="normal" font="default" size="100%">10/2024</style></DATE><URL><style face="normal" font="default" size="100%">https://www.sciencedirect.com/science/article/pii/S2405844024158562?via%3Dihub</style></URL><title><style face="normal" font="default" size="100%">The concept of effective coverage radius use of the unlicensed high-frequency range in the operation of the 5G network</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Volodymyr Dubovoi</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Maria Yukhimchuk</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Viacheslav Kovtun</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Functional Dependability of Distributed Control of Multi-zone Objects under Failures Conditions</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2024</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">IEEE Access</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">12</style></VOLUME><URL><style face="normal" font="default" size="100%">https://ieeexplore.ieee.org/abstract/document/10577659</style></URL><title><style face="normal" font="default" size="100%">Functional Dependability of Distributed Control of Multi-zone Objects under Failures Conditions</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Viacheslav Kovtun</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Elena Zaitseva</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Vitaly Levashenko</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">The concept of optimal planning of a linearly oriented segment of the 5G network</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2024</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">PLOS ONE</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">19</style></VOLUME><DATE><style face="normal" font="default" size="100%">04/2024</style></DATE><URL><style face="normal" font="default" size="100%">https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0299000</style></URL><title><style face="normal" font="default" size="100%">The concept of optimal planning of a linearly oriented segment of the 5G network</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Artur Frankiewicz</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Ocena wydajności mechanizmu retransmisji TS011_1. 0.0 w sieciach LoRa WAN</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2024</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Przegląd Telekomunikacyjny+ Wiadomości Telekomunikacyjne</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><URL><style face="normal" font="default" size="100%">https://yadda.icm.edu.pl/baztech/element/bwmeta1.element.baztech-ca38f38f-5189-4f56-b397-df8beb305838</style></URL><title><style face="normal" font="default" size="100%">Ocena wydajności mechanizmu retransmisji TS011_1. 0.0 w sieciach LoRa WAN</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Piotr Pecka</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Anna Strzoda</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">J. Fourneau</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Lynda Mokdad</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Monika Nycz</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Tomasz Nycz</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">The impact of CSMA on LoRaWAN gateways' performance in IoT networks</style></TITLE></TITLES><KEYWORDS><KEYWORD><style face="normal" font="default" size="100%">LoRa</style></KEYWORD></KEYWORDS><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2026</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%"/></SECONDARY_TITLE><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Las Vegas USA</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">IEEE</style></PUBLISHER><DATE><style face="normal" font="default" size="100%">02/2026</style></DATE><KEYWORD><style face="normal" font="default" size="100%"/></KEYWORD><ABSTRACT><style face="normal" font="default" size="100%">&lt;p&gt;The CSMA mode of operation was recently added to the LoRaWAN standard. We investigate, using a queueing model, how the introduction of CSMA in the communication between devices and the gate in LoRaWan may increase the probability of successful transmission. &#160;In the proposed model, customers (transmissions) are served by a multichannel station (gate), and the number of channels corresponds to the number of transmissions that can be performed in parallel. We introduce a queueing model with multiple attempts to find a free channel and investigate their impact on transmission throughput and reliability.&lt;br /&gt;&#13;
&#160;&lt;/p&gt;&#13;
</style></ABSTRACT><URL><style face="normal" font="default" size="100%">https://ieeexplore.ieee.org/document/11366536</style></URL><title><style face="normal" font="default" size="100%">The impact of CSMA on LoRaWAN gateways' performance in IoT networks</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Volodymyr Dubovoi</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Maria Yukhimchuk</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Viacheslav Kovtun</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Model-Oriented Training of Coordinators of the Decentralized Control System of Technological Facilities With Resource Interaction</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2025</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">IEEE Access</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">13</style></VOLUME><SECTION><style face="normal" font="default" size="100%">13414</style></SECTION><DATE><style face="normal" font="default" size="100%">01/2025</style></DATE><title><style face="normal" font="default" size="100%">Model-Oriented Training of Coordinators of the Decentralized Control System of Technological Facilities With Resource Interaction</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>0</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Viacheslav Kovtun</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Mohammed Al-Maitah</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Saad Aldosary</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Oleksii Kozachko</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Entropy-extreme concept of data gaps filling in a small-sized collection</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2025</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Egyptian Informatics Journal</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><VOLUME><style face="normal" font="default" size="100%">29</style></VOLUME><SECTION><style face="normal" font="default" size="100%">100621</style></SECTION><DATE><style face="normal" font="default" size="100%">2025</style></DATE><ABSTRACT><style face="normal" font="default" size="100%">&lt;p&gt;Annotation The article investigates the process of filling data gaps in a small-sized collection, which generalizes information about periodic measurement of input and output parameters of a target object. To fill the data gaps, a concept is proposed based on generating a committee of entropy-optimal trajectories through sampling probability density functions of parameters from a stochastic parameterized model trained on relevant data. The concept is generalized to cases of filling gaps in output data, input data, and both those data spaces. Filling gaps in output data is implemented using entropy-extreme estimation of probability density functions for parameters of the model and errors of measurement. In the case of addressing missing values in input data, these are interpreted as results of transforming a sequence of independent stochastic vectors introduced into a model structurally identical to that formalized for filling gaps in output data. Thus, the proposed concept inherits the benefits of both parametric estimation and using a trained model of the target process and non-parametric estimation of undefined characteristics that distort data. The proposed concept was tested on the task of filling gaps in a collection consisting of 35 tuples with measurement results of three attributes. It was considered that the imperfection of the measurement procedure caused variability in the obtained data at the level of 15% of their absolute value. Less than 20% of the data from the collection was used to train the corresponding entropy-extreme model. The relative error of the filled missing data was 0.21.&lt;/p&gt;&#13;
</style></ABSTRACT><URL><style face="normal" font="default" size="100%">https://www.sciencedirect.com/science/article/pii/S1110866525000143</style></URL><title><style face="normal" font="default" size="100%">Entropy-extreme concept of data gaps filling in a small-sized collection</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>7</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Zachary Collier</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Rafael Muñoz-Carpena</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Matthew Warren</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Anca Rusu</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Oleksandr Chemerys</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Vadym Dodonov</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Robert Horton</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Gregory Kiker</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Gábor Komlósi</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Understanding Collapse and Recovery: Working Group Summary</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2025</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Digital Technologies for Enhancing Resilience</style></SECONDARY_TITLE><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Amsterdam</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">IOS Press</style></PUBLISHER><VOLUME><style face="normal" font="default" size="100%">Volume 67: Digital Technologies for Enhancing Resilience</style></VOLUME><NUMBER><style face="normal" font="default" size="100%">NATO Science for Peace and Security Series - D: Information and Communication Security</style></NUMBER><PAGES><style face="normal" font="default" size="100%">39–86</style></PAGES><URL><style face="normal" font="default" size="100%">https://ebooks.iospress.nl/doi/10.3233/NICSP250012</style></URL><title><style face="normal" font="default" size="100%">Understanding Collapse and Recovery: Working Group Summary</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Michał Romaszewski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Jarosław Sotor</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Piotr Masłowski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Bartosz Belter</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Towards AI-assisted Science with PLAI4SCIENCE - new Polish Research Infrastructure</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2025</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">6th Polish Conference on Artificial Intelligence (PP-RAI 2025)</style></SECONDARY_TITLE><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><DATE><style face="normal" font="default" size="100%">04/2025</style></DATE><title><style face="normal" font="default" size="100%">Towards AI-assisted Science with PLAI4SCIENCE - new Polish Research Infrastructure</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Artur Frankiewicz</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">Using Time Series Analysis to Generate Synthetic Traffic Data for LoRa Network Simulation</style></TITLE></TITLES><KEYWORDS/><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2026</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">PP-RAI 2025 Advances in Artificial Intelligence Research</style></SECONDARY_TITLE><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Cham</style></PLACE_PUBLISHED><LANGUAGE><style face="normal" font="default" size="100%">eng</style></LANGUAGE><PUBLISHER><style face="normal" font="default" size="100%">Springer Nature Switzerland</style></PUBLISHER><DATE><style face="normal" font="default" size="100%">01/2026</style></DATE><ISBN><style face="normal" font="default" size="100%">978-3-032-04197-5</style></ISBN><ABSTRACT><style face="normal" font="default" size="100%">&lt;p&gt;Modelling radio signal attenuation in Low Power Wide Area Networks (LPWANs) is a complex challenge due to the numerous factors influencing signal propagation and attenuation. Recent advancements in artificial intelligence have enabled the use of neural network-based time series analysis to develop radio attenuation models suitable for radio simulators. In this paper, we evaluate the feasibility of such AI-driven models for discrete event simulations. To train and validate these models, we utilize data collected from a large-scale LoRaWAN network that has been operational for over six years. The trained model is then applied to generate synthetic data for radio network simulations. We compare the AI-generated data with conventional distribution-based generators, assessing their effectiveness in modelling real-world events and analysing the statistical distribution of the generated data. Finally, we discuss the benefits and limitations of using AI-based models for simulation purposes. While traditional generators typically produce data distributions that closely mirror real data, AI algorithms are more effective at capturing specific patterns found in actual datasets what is challenging with conventional methods.&lt;/p&gt;&#13;
</style></ABSTRACT><URL><style face="normal" font="default" size="100%">https://link.springer.com/chapter/10.1007/978-3-032-04197-5_16</style></URL><title><style face="normal" font="default" size="100%">Using Time Series Analysis to Generate Synthetic Traffic Data for LoRa Network Simulation</style></title></RECORD><RECORD><source-app name="Bibcite" version="8.x">Drupal-Bibcite</source-app><REFERENCE_TYPE>31</REFERENCE_TYPE><CONTRIBUTORS><AUTHORS><AUTHOR><style face="normal" font="default" size="100%">Tadeusz Czachórski</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Krzysztof Grochla</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Piotr Pecka</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Anna Strzoda</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Jean Fourneau</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Lynda Mokdad</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Monika Nycz</style></AUTHOR><AUTHOR><style face="normal" font="default" size="100%">Tomasz Nycz</style></AUTHOR></AUTHORS></CONTRIBUTORS><TITLES><TITLE><style face="normal" font="default" size="100%">The Impact of CSMA on LoRaWAN Communication Efficiency: A Diffusion Approximation Model</style></TITLE></TITLES><KEYWORDS><KEYWORD><style face="normal" font="default" size="100%">Diffusion approximation; LPWAN; CSMA</style></KEYWORD></KEYWORDS><DATES/><AUTHORS><style face="normal" font="default" size="100%"/></AUTHORS><YEAR><style face="normal" font="default" size="100%">2026</style></YEAR><SECONDARY_TITLE><style face="normal" font="default" size="100%">Nineteen International Workshop on Selected Topics in Mobile and Wireless Computing WiMob</style></SECONDARY_TITLE><PLACE_PUBLISHED><style face="normal" font="default" size="100%">Avignon, France</style></PLACE_PUBLISHED><PUBLISHER><style face="normal" font="default" size="100%">IEEE</style></PUBLISHER><KEYWORD><style face="normal" font="default" size="100%"/></KEYWORD><title><style face="normal" font="default" size="100%">The Impact of CSMA on LoRaWAN Communication Efficiency: A Diffusion Approximation Model</style></title></RECORD></records></xml>
