优先级回退算法性能分析

为了解决采用优先级回退算法提供优先级区分的类IEEE 802.11协议的性能分析问题,并为进一步优化协议提供支持,在借鉴IEEE 802.11容量分析方法的基础上,提出了一种基于古典概率分析模型的性能分析方法.通过计算不同优先级业务的平均回退窗口,估算整个网络中分组的平均发送周期长度,从而得到该网络的最大吞吐量.对两级优先级网络容量进行了理论分析,得到了关于网络容量的解析结果.仿真结果表明,理论结果与仿真结果一致,该分析方法能够得到网络容量的准确结果.

Capacity analysis of priority backoff arithmetic

In order to conduct performance analysis of IEEE 802.11 protocol in which priority backoff arithmetic was adopted and to provide for protocol optimization,a new analysis model based on the classical probability model was proposed.The capacity was computed by estimating the average period of packets sending. The two-level priority protocol was examined using this model.Simulation results coincide with the theoretical analysis,which proves the accuracy of this priority backoff arithmetic.