Effect of switching time on timer-based burst assembly and its effect on voice-over-Internet protocol quality of service over optical burst switching networks

Abstract

It is well known that performance, such as burst loss probability and transmission delay, for optical burst switching (OBS) networks greatly depends on the switching time of the OBS switch. We analyze the switching-time effect on the burst loss probability using a continuous-time Markov chain. In our analysis, the transmission time of a burst is characterized with both the burst size and the switching time, and the burst loss probability, burst throughput, and data throughput are explicitly derived using the Geo,M/M/c/c queueing model. Numerical examples show that our analysis is quite useful for investigating the effect of the switching time on the timer-based burst assembly. We also consider voice-over-Internet Protocol (VoIP) service as a delay-sensitive application, and we investigate the switching time on the VoIP service. From our performance analysis, we derive an appropriate switching time and a burst processing time of the VoIP service in terms of the transmission distance.