Loss and delay behavior of an ATM multiplexer for aggregated PMPP (Pareto-modulated Poisson process) traffic sources

Average cell loss and cell delay behavior of a simulated 155 Mbit/s ATM multiplexer is studied for aggregated traffic from a number of Pareto-modulated Poisson process (PMPP) sources. PMPP traffic sources are known to generate self-similar traffic with long-range dependence; the dependence of average cell loss ratio and average cell delay parameters on varying buffer sizes is reported. Inappropriateness of large buffers in reducing the cell loss ratio significantly for self-similar, LRD traffic is established. Results shows that if both average CLR and average cell delay are combined together, increasing buffer sizes beyond a limit increases the delay much more significantly than reducing the CLR.