中文摘要：

路由选择是实现VANET的关键技术之一，没有合适而高效的路由选择算法，VANET就无法工作。由于路由在长距离通信时多跳易断裂，通信链路只需满足通信需求即可。文章对GPSR路由协议进行了改进，提出了VANET场景下的GPSR路由算法：GPSR-R。GPSR-R根据移动节点问链路建立的网络需求进行综合考虑，充分利用不稳定但满足需求的路由完成信息的传递。分析结果表明，GPSR-R在数据包传递率、丢包率方面优于GPSR和GPSR-AD。

英文摘要：

Routing is a key technology of vehicular ad hoc networks（VANET）. VANET will not world without appropriate and efficient routing algorithm. Because the long-distance multi-hop routing is breakable, the communication link only need to satisfy the basic need of communication. In this paper, a GPSR-R routing algorithm in VANET scenario is proposed to make an improvement in GPSR routing protocol. GPSR-R takes comprehensive consideration of network requirements which is built up by the mobile nodes, and makes full advantage of routing which is unstable but can complete transmission of information. The simulation results show that GPSR-R does better than GPSR and GPSR- AD in packet delivery rate and packet loss rate.