基于Geom/Geom/1模型的网络节点性能研究

The study of network node performance based on Geom/Geom/1 model

针对因节点失效而产生的网络性能问题,提出了一种刻画节点有效性的算法TQL-WG(Traffic Queue Length based on Wavelet and Geom/Geom/1).该算法首先利用小波变换降低流量的长相关特性,并且基于Geom/Geom/1模型建立流量队长与节点有效性的数学表达式.同时通过仿真实验对比研究了TQLWG算法与以往算法的优劣,并深入分析了有效性与各影响因素之间的关系,结果表明TQLWG更具有适应性.

In order to mitigate the network performance by node failures, a novel availability evaluation algorithm（Traffic Queue Length based on Wavelet and Geom/Geom/1, TQLWG） is proposed. In this algorithm, the long-range dependence of traffic is decreased with wavelet transform at first, and the mathematic formulas of traffic queue length and node availability are established with Geom/Geom/1 model. Then, compared with the previous algorithm, a simulation was conducted to research on the relationship between the availability and influencing factors. The result shows that it is more adaptive for TQLWG.