一种自相似网络可靠性分析模型

利用ON/OFF模型产生自相似流量，提出了一种基于排队延迟的自相似网络可靠性分析模型。将节点和到达信息流视为G/M/1/B排队模型，利用大偏差理论得到节点平均排队延迟时间，进而得到网络各种工作状态下全网平均排队延迟时间。再利用延迟阀值得到各种工作状态下的网络可靠性，进一步得到全网可靠性。通过模拟计算，得到了给定拓扑结构网络的可靠性与自相似程度、ON/OFF源数量以及节点缓存大小之间的关系。

Analytical model of reliability based on self-similar network

ON/OFF model is used to generate self-similar traffic.And then an analytical model for network reliability is presented. Node and traffic is viewed as a G/M/1/B queuing system.Node queuing delay is derived by large deviation theory firstly.Based on this ,average network queuing delay at every working state is derived.Then network reliability at every state is gained by use of delay limitation.Finally,network reliability is derived.Calculating and modeling results the relation among reliability of topology given network and self-similar parameter,the number of ON/OFF sources and buffer size.