Time-Dependent Performance of a Multi-Hop Software Defined Network
| Author | Czachórski T.; Gelenbe E.; Kuaban G.; Marek D. |
|---|---|
| Title | Time-Dependent Performance of a Multi-Hop Software Defined Network |
| Journal | Applied Sciences |
| Year | 2021 |
| Status | Published |
| Volume | 11 |
| Issue | 2469 |
| DOI | 10.3390/app11062469 |
| URL | https://www.mdpi.com/journal/applsci |
| Abstract | <p>It has been recently observed that Software Defined Networks (SDN) can change the<br /> paths of different connections in the network at a relatively frequent pace to improve the overall<br /> network performance, including delay and packet loss, or to respond to other needs such as security.<br /> These changes mean that a network that SDN controls will seldom operate in steady state; rather,<br /> the network may often be in transient mode, especially when the network is heavily loaded and<br /> path changes are critically important. Hence, we propose a transient analysis of such networks to<br /> better understand how frequent changes in paths and the switches’ workloads may affect multi-hop<br /> networks’ performance. Since conventional queueing models are difficult to solve for transient<br /> behaviour and simulations take excessive computation time due to the need for statistical accuracy,<br /> we use a diffusion approximation to study a multi-hop network controlled by SDN. The results show<br /> that network optimization should consider the transient effects of SDN and that transients need to be<br /> included in the design of algorithms for SDN controllers that optimize network performance.</p> |
| applsci-11-02469.pdf |