摘要
由于车辆的高移动性,网络拓扑结构频繁变化,路由协议对于信息发送效率有着很大的影响。结合已有的MAC层多信道接入协议,考虑信道衰落产生的传输失败概率,设计了一种基于转发效率预测的跨层路由协议GPSR-EP(Greedy Perimeter Stateless Routing Based on Efficiency Prediction)。GPSR-EP通过对下一跳的所有可选节点的转发效率进行预测,以单位时间传输距离最优化为策略进行路由选择,有效提高信道利用率。仿真结果表明,与GPSR相比,GPSR-EP在高速场景中能有效提高网络传输效率。
Due to the high mobility of vehicles, the network topology changes frequently, such that the routing protocol has a great impact on the efficiency protocol greedy perimeter stateless routing based transmission failure probability caused by channel of information transmission. A novel cross-layer routing on efficiency prediction （GPSR-EP） is proposed. The fading is considered. The forwarding efficiency of each node in the next hop is predicted, and the optimization of transmission distance in the unit time is used as the strategy to improve the channel utilization. Simulation results show that, compared with GPSR, GPSREP has an obvious improvement on the transmission success rate and the transmission delay.
出处
《南京邮电大学学报（自然科学版）》
北大核心
2017年第3期73-77,共5页
Journal of Nanjing University of Posts and Telecommunications：Natural Science Edition
基金
国家重点基础研究发展计划(973计划)(2013CB329005)
国家自然科学基金(61571234)资助项目
关键词
车载自组织网络
路由协议
GPSR
VeMAC
多跳转发
vehicular ad hoc network （VANET）
routing protocol
greedy perimeter stateless routing（GPSR）
VeMAC
multihop transmission
