AODV-MR: AODV with multi-RREP for VANET

VANETs are a promising situation to improve the road traffic safety, traffic monitoring and other applications. However, the vehicles mobility and versatile topology lead to frequent failure of VANET links. In this paper, we propose a new scalable routing scheme named AODV-MR (AODV with multi-RREP). A novel metric is used to detect the link connectivity, which is calculated in every node by broadcasting HELLO messages during the route discovery, source vehicle receiving multi-RREPs will determine the optimal route and suboptimal route by considering the factors of minimal hops and route cost metric (RCM). Moreover, the AODV-MR plays a key role in repairing broken routes and the carry-and-forward mechanism was utilized to repair route. Simulation results show that the performance of new scheme is superior to AODV in terms of high packet delivery radio, links reliability and end to end delay.