Traffic information based routing protocol in vehicular Ad hoc networks
基于车流信息的车载自组织网络路由协议*

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.