利用 ETX路由度量的无线Mesh网络协调机会路由协议

摘要

To solve the problem of lots of retransmissions and frequent execution of route discovery process in traditional routing protocols,this paper proposed coordinated opportunistic routing protocol based on ETX routing metric.Firstly,it exploited the broadcast nature of wireless networks to find the optimal routing solution that maximizesd throughput and minimizes packet loss. Then,it addressed the key issue of computational overhead by designing new routing technique.Finally,it used the source node sending credit and cost to calculation node domains and finish routing discovering.The simulation results show that the proposed protocol increases average throughput up to 32%,and increases in delivery ratio (from 10% to 20%)in various parameters. When compared to other novel protocols,the proposed protocol gets better performance in duplicate transmissions and network col-lisions.%针对无线网格网络（wireless Mesh network，WMN）中传统路由协议重复传输且频繁运行路由发现过程的问题，提出了基于期望传输次数（expected transmission count，ETX）路由度量的协调机会路由协议。首先，利用无线网络的广播特性寻找拥有最大化吞吐量和最小丢包率的最优路由协议；然后，使用E TX路由度量标记关键问题的计算成本；最后，利用源节点发送的信用和区域成本计算节点的区域，并实现路由发现。仿真结果表明，提出的路由协议在不同参数情况下，平均吞吐量可提高32％，投递率可由10％提高至20％，相比其他几种较新的路由协议，提出的协议在吞吐量、投递率和平均端与端间延迟方面具有更好的性能。