This paper presents the M/G/1 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.
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机译：本文介绍了基于IXP2400的VoIP SPS（信令解析系统）的M / G / 1多级开放排队网络性能模型。我们使用UML活动图和功能模块图来描述此VoIP SYS，并导出性能模型。生成的模型可以用先到先得（FCF）调度策略和混合流量来对基于IXP2400的VoIP SPS进行统计分析。我们使用迭代分解算法的近似计算来解决该模型，并呈现利用率，延迟等的公式。理论估计与我们的测试数据具有优异的一致性，这表明了我们的性能评估方法的有效性。
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