摘要
由于传统流量模型使用泊松分布描述流量到达过程,不能反映网络流量的突发特性,根据多个具有重尾分布的ON/OFF节点建立流量模型。并分析验证了数据流的到达过程服从Pareto分布,通过干扰概率、信道竞争度、物理干扰模型SINR来计算得到路由判据LIM,并基于路由判据LIM提出LIM-HWMP协议。该协议根据LIM在具有流量突发特性的网络中选择一条干扰较小的路径,减少了端到端时延。通过NS2仿真软件对HWMP、LIM-HWMP进行仿真验证表明,改进的路由协议在平均端到端时延以及丢包率方面都有一定的改善。
As the traditional traffic model which uses Poisson distribution to describe the flow arrival process can not reflect the burst characteristics of network traffic, a traffic model using multiple ON/OFF nodes with heavy tailed distribution is built. And then the arrival process of the data stream is verified and analyzed to obey the Pareto distribution. The route metric LIM is calculated by the interference probability, channel competition degree, and physical interference model SINR. According to the LIM, the LIM-HWMP is proposed, which will select a path with smaller interference in the network with traffic burst characteristics to reduce the end to end delay. Through using the NS2 simulation software to simulate the HWMP and LIM-HWMP protocol, it is indicated that the advanced route protocol get both a certain improvement in the terms of the average end-to-end delay and the packet loss rate.
出处
《计算机应用与软件》
CSCD
2016年第12期93-97,126,共6页
Computer Applications and Software
基金
重庆市研究生教学改革研究项目(yjg143097)
