Routing protocol research for vehicular ad hoc networks (VANETs) confronts challenges be-cause the rapid moving of vehicle node leads to the frequent changes of the network topology and the unstable quality of wireless link .In order to deal with these challenges ,a hybrid information and re-dundant transmission based routing protocol for VANETs is proposed .According to the road charac-teristics in urban environment ,an undirected graph is abstracted ,where the intersections are vertices and road sections are edges .The real-time information of traffic and networks is collected by the sta-tionary nodes deployed in the intersection ,and a weight value is given for each edge ,and then the shortest path between any two intersections is calculated by using the Dijkstra algorithm .As for the data transmission within road section ,the next node is selected by considering the distance ,speed and link reliability ,and the success rate of data transmission is improved through redundant transmission technology .The simulation results indicate that the proposed routing protocol performs well .%车辆节点的快速移动导致网络拓扑频繁变化和无线链路质量不稳定,这为车载自组织网络(vehicular ad-hoc networks,VANETs)路由协议的研究带来挑战.为了应对这些挑战,文章提出了基于混合信息和冗余传输的VANETs路由协议.针对城市环境下道路的特点抽象出一个以交叉路口为顶点,以路段为边的无向图,并依托部署在路口的固定节点收集交通和网络的实时信息为每条边赋予权值,然后运用Dijkstra算法计算任意2个交叉路口间的最短路径;针对路段内的数据传输,综合考虑距离、速度和链路可靠性等因素来选择下一跳节点,并通过冗余传输技术提高数据传输的成功率.通过仿真实验对比现有协议,验证了该路由协议在性能上的优越性.
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