基于车流信息的车载自组织网络路由协议*

车载自组织网络(VANET)具有高移动性和间歇连通性，而且拓扑变化频繁，特别是在事故或交通堵塞的时候，因此，采用了携带并转发的方式，即移动车辆携带数据直到遇见有可转发的车辆。与现有携带并转发的解决方法不同，本文采用分布式实时估计各路段延时的方法。基于对各路段延时的估计，车辆就能计算车低延时的路由路径，然后提出了分布式实时数据流统计辅助的路由协议(DRTAR)来转发数据。实验结果显示，提出的DRTAR协议性能优于其他算法。

Traffic information based routing protocol in vehicular Ad hoc networks

A vehicular Ad hoc network (VANET) not only experiences highly mobile and frequently disconnected, but also have to deal with rapid changes of network topologies, especially when accidents and road traffic jams happen. This paper proposed a novel approach to address this issue. Due to the intermittent connectivity in VANET, it adopted the idea of carry and forward, where a moving vehicle carried the packet until forwarding the packet to a new vehicle. Different from existing carry and forward solutions in VANET, it made use of the distributed real-time evaluations of data traffic statistics of all roads for each vehicle. Based on the evaluation of current packet delivery delay along each road, each vehicle could find the routing path to forward the packet to reduce the delay. It proposed the distributed real-time data traffic statistics assisted routing protocol (DRTAR) to forward the packet to the appropriate road. Experimental results show that the proposed DRTAR protocol outperforms other solutions.