Performance analysis of WDM OPS with a space priority mechanism under self-similar variable length packet traffic

In this paper, we study the switching performance of WDM optical packet switch (OPS) with a space priority mechanism, under self-similar variable length packet traffic. In this study, we model WDM OPS equipped with tunable wavelength converters as a multi-server space priority queuing system, MMPP/M/W/C. In our model, packets arriving at WDM OPS are assumed to follow Markov modulated Poisson process (MMPP) that emulates self-similar traffic. Service times are exponentially distributed to cope with variable packet length. The space priority mechanism is adapted to schedule delay sensitive real time (high priority) traffic and delay-tolerant non-real time (low priority) traffic. Simulation results are more promising and also confirm, space priority mechanism not only can maintain the Quality of Service (QoS) for the real time traffic but also can provide the optimum utilization of the capacity for non-real time traffic.