具有稳定链路的改进AODV路由协议  

Improved AODV Routing Algorithm with Stable Link

作　　者：徐哲鑫[1] 彭杏云 林潇[1] 吴怡[1] 

机构地区：[1]医学光电科学与技术教育部重点实验室福建省光子技术重点实验室福建师范大学,福州350007

出　　处：《网络新媒体技术》2016年第4期36-45,共10页Network New Media Technology

基　　金：国家自然科学基金资助项目(No.61571128);教育部博士点基金新教师类(20133503120003);福建省科技厅工业科技计划重点项目(No.2014H0019);福建省自然科学基金资助项目(No.2013J01224);教育部"长江学者和创新团队发展计划"创新团队项目滚动支持计划(No.IRT_15R10)

摘　　要：车载自组织网中节点拓扑动态变化,针对节点间链路不稳定从而影响路由性能问题,提出了具有稳定链路的改进AODV路由协议。该协议构造了由车辆间相对速度、转发角度以及节点负载等关键因素组成的节点稳定度(St)参量;以节点度量为基础,引入随机数筛选机制完成中继节点的选择;进一步构造链路质量度量(LQ)参量,选择最优及次优路由提高数据包投递率;在路由修复中,使用断点修复机制完成最优及次优路由间快速切换以及断链修复,降低网络开销及数据传输延迟。仿真表明,AODV-SL在平均端到端时延、数据包分组投递率以及标准化路由开销上都优于AODV及HLAR路由协议。In Vehicular ad hoc network, the network topology is dynamic so that the unstable link among nodes will decline the perform- ance of router. In order to solve this problem, AODV with stable link is proposed in this paper. Firstly, node stable metric （St） which consists of relative velocity, forward angle and load of node is defined. Secondly, the relay nodes are elected by comparing their St to a random threshold. Thirdly, link quality （LQ） metric is further defined to elect the optimal and suboptimal router in order to enhance the packet delivery ratio. Finally, in the phase of routing repair, a breakpoint repair mechanism is proposed. Then, router will quickly switch between optimal and suboptimal router. So, there are smaller network overhead and less transmission delay. The simulation re- sults show that AODV - SL is superior to AODV and HLAR in terms of average end - to - end delay, packet delivery ratio and normali- zing routing overhead.

关 键 词：稳定链路 AODV 节点度量 链路质量 路由修复 

分 类 号：U463.67[机械工程—车辆工程] TP391.44[交通运输工程—载运工具运用工程] TN929.5[交通运输工程—道路与铁道工程]