基于QoS的VANETs网络分布式协作路由算法  

Distributed Cooperative Routing Algorithm Based on QoS in VANETs

作　　者：郑洪江[1] 王会鲜[2] 鲍娟[2] 陈伟[2] 

机构地区：[1]武汉理工大学信息工程学院,湖北武汉430070 [2]武汉理工大学自动化学院,湖北武汉430070

出　　处：《武汉理工大学学报（信息与管理工程版）》2015年第5期542-547,共6页Journal of Wuhan University of Technology：Information & Management Engineering

基　　金：国家自然科学基金资助项目(51268051);国家高技术研究发展计划基金资助项目(2013AA122403)

摘　　要：针对VANETs中车辆节点的高速移动性导致网络的拓扑结构频繁变化、通信链路频繁断裂,严重破坏了数据传输的可靠性和稳定性,极大降低了网络性能的情况,提出一种适用于VANETs的QoS分布式协作路由算法(LETB-AODV算法)。该算法在AODV路由协议的基础上进行扩展,用链路连接失效时间(LET)和有效带宽来建立双重约束,通过选用最大LET的链路构建最优通信路由路径。仿真结果表明,LETB-AODV协议比AODV协议能够更有效地降低链路断链率、丢包率和路由开销,从而提高通信链路的稳定性,增强网络可靠性。In VANETs, high-speed mobility of vehicles always lead the network topology to change dynamically and com-munication link to fracture frequently, which severely damaged the reliability and stability of data transmission and greatly re-duced the network performance.In this paper, a kind of distributed cooperative routing algorithm based on QoS （ LETB-AODV routing algorithm） for VANETs was proposed.This protocol, extended from AODV routing protocol, used link expiration time （ LET） and available bandwidth to establish the double constraints, and chose the maximum LET link as the optimal routing path of communication.The simulation results show that the performances of LETB-AODV protocol are better than AODV protocol in packet loss rate, routing overhead, LET, consequently demonstrating the enhancement of path-routing link stability and network reliability with distinct superiority.

关 键 词：协作通信 QOS路由 链路连接失效时间 有效带宽 分布式算法 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]