A new reliable routing technology for vehicular ad hoc networks

In vehicular ad hoc network the fast movements of the node and the dynamic topological changes lead to the frequent disconnection of the multi-hop routing, and further lead to the challenge for routing algorithm on how to accurately acquire information of the destination node and how to forward packets. This paper proposes a routing protocol that incorporates greedy forwarding and directional forwarding based on geographical position called — GDGP. The position information of the destination nodes stored on every node could be updated through two independent message interactive mechanisms, which makes sure of the consistency of the position information recorded on every node and the real-time performance when refinds the routing. This further ensures the reliability of the routing algorithm. We compare the performance of GPSR and GDGP using network simulator NS-2 with the actual node movement model. The simulation results show that the improved routing protocol has a better performance in city scenes.