Performance study of SVC-based IP-over-ATM networks

Resource allocation is one of major issues on SVC-based IP-over-ATM networks. We study the effect of the system design parameters on the performance using a finite-capacity single-vacation model, with close-down/setup times and a Markovian arrival process (MAP). We show the packet loss probability as a function of buffer size, SVC timeout period, and bandwidth. If the SVC setup delay and release delay are small, the loss during SVC setup is relatively small, and the loss in the service phase is dominant. However, if the SVC setup delay and release delay are large, the loss in SVC setup is significantly larger than the loss in the service phase. When the SVC timeout period is changed, there is a tradeoff between SVC setup rate and SVC utilization rate. Therefore, the timeout period must be set to maximize SVC utilization rate and to minimize the processing power of the SVC processor.