车载自组织网络路由协议算法改进

One of the most popular study points in VANET is routing protocol. VANET is characterized by high mobility of nodes, vast frequent changes of network topology and hard maintain of links between nodes. These are the challenges that has to solute when design VANET routing protocol. Based on analysis of geography-based GPSR routing protocol and combine with city scenarios this paper presents an improvement version of GPSR protocol in VANET. The improvement point is focus on the city scenario, and then the new protocol is simulated on NS2 network simulation platform in order to make a comparison to the original GPSR protocol in routing performances. As it turns out, in city scenarios,the new protocol performs better as a whole.It improves packets arrival rate to a new level at the expense of a little extra time in average end-to-end delay. Thus the proposed algorithm can provide better routing performance in VANET in city scenarios.????