Using Queuing Network to Evaluate IXP2400 Based VoIP SPS

This paper presents the M/G/l multi-class open queuing networks performance model of IXP2400- based VoIP SPS (signaling parse system). We use UML activity diagrams and function module diagrams to describe this VoIP SYS, and derive the performance model. The resulting model could make statistic analysis of IXP2400-based VoIP SPS with First-Come- First-Serve (FCFS) scheduling policy and mix traffic. We use the approximate calculation of iterative decomposition algorithm to solve this model, and present the formulas of the utilization, delay, etc. The theoretical estimates are in excellent consistence with our testing data, this shows the effectiveness of our performance evaluating method.