An Improved AOMDV Routing Protocol for V2V Communication

Active security and intelligent transportation are important Vehicular Ad hoc Network (VANET) applications, which need suitable vehicle-to-vehicle communication technology, especially routing technology. When designing routing protocol for VANET, driving information of vehicles can be used as routing metrics, which can provide additional routing information. A routing metric combining hop and speed is proposed with consideration of vehicle driving information employment and delay reduction. Also a driving information collecting module is designed and implemented using On-Board Diagnostic (OBD) technology to collect speed information in real time without any modification of vehicles. Based on the new routing metric, an improved Ad hoc On-demand Multipath Distance Vector with speed metric (S-AOMDV) routing protocol is designed to make use of advantages of multi-path routing protocol, such as fault-tolerant and load balance. Compared with AOMDV with minimum hop-count metric, simulation results show that S-AOMDV achieves better performance.