基于优先级调度的泊松业务流延时分析

Delay Analyse of Poisson Traffic Based on Priority Scheduling

网络中点到点的延时对网络控制系统(NCS)的性能会产生很大的影响,因此正确获得点到点的延时非常重要。然而,由于网络系统比较复杂,随机型业务流的延时难于通过理论方式获得。为此利用NS2仿真平台,在有带宽瓶颈的节点下,对2个不同优先级泊松业务流的传输延时进行仿真,并分析它们的延时,从而得出统计结果,可以为网络传输延时的理论分析提供实验数据。

The transmission time delay between end and end has a great impact on the performance of networked control system （ NCS）, so it＇ s important to get the end-to-end time delay. However, the transmisson delay of stochastic traffic is hard to obtain by theoretical analysis because of the complexity of NCS. This paper made simulation on NS2 for two Poisson traffic flows passing trough a bandwidth- limited node under the scheduling by priorities, statistical result of delays is obtained, which supply experiment data for theoretical analysis of transmission delay.