A GPS enhanced routing protocol for vehicular Ad-hoc network

Although Vehicular Ad-hoc Network (VANET) is a subclass of Mobile Ad-hoc Network (MANET), some routing protocols designed for MANET, such as AODV, are no longer suitable in VANET due to the high mobility of VANET. For this reason, we propose a GPS based AODV (GBAODV) in this paper. With the support of the GPS device, we constrain the number of AODV routing packets flooding in the network and establish every route with high stability. Unlike conventional simulation strategy, we separate traffic simulation and network simulation apart with the purpose of building more reliable scenarios. The simulation results show that GBAODV reduces packet loss ratio and shortens average end-to-end delay in both downtown and highway model. Although some researchers have proposed their GPS enhanced AODV protocols before, none of them have implemented those protocols in hardware. We introduce a portable version of physical implementation of GBAODV in this paper. The experimental results validate the improvement of GBAODV.