网络瓶颈链路流量和时延关系研究

Research the relation between bottleneck link traffic and delay

本文从理论上推导了瓶颈链路流量和时延的关系,并用OPNET仿真验证了该关系。本文的工作核心有3点:一是根据M／M／1排队模型采用最小二乘方法获得回归方程,避免了繁琐的流量计算,只需测量时延即可获得流量;二是推导了时延与瓶颈链路流量的关系;三是用IPMP探测包测量时延。本文证明了该方法的有效性,并给出了仿真结果。

This paper deduces the relation between delay and bottleneck link traffic. Our work has three parts: First, we measure delay by injecting probe packet pairs into the network based on the Internet Protocol Measurement protocol (IPMP) by Poisson law. Second, we deduce the regression equation based on M/M/1 queue model. Last, we compute regression coefficient by means of the least squares method. We prove the validity of regress analysis method. Our computing results show the competing traffic error within about 30% by regress equation.