Simulation of Self-Similar Traffic in Switches Using Crossbar and Prioritized VOQs

Abstract

In this paper, analysis and simulations of splitting and merging self-similar traffic are done on a router/switch which uses prioritized VOQs (Virtual Output Queue) as its input queues and crossbar as its switch fabric. The results of the simulations say that merge traffic with the same Hurst values (no matter what the data rate is) will not change the Hurst value of merged traffic, but merge traffic with different Hurst values (short-range dependent traffic can be considered as the case in which its Hurst value equals 0.5) will result in a traffic whose Hurst value is no more than the maximum and no less than the minimum. Also the splitting of traffic will have a great influence on resulting traffic, even the degree of LRD (Long-Range dependence) is very high in the original traffic, after being split twice at VOQs and priority queues, the degree of LRD is greatly decreased.