A Multiple Metrics Gateway Selection Algorithm for Vehicular Ad Hoc Networks in Fading Channels

Vehicular ad hoc network (VANET) is a type of promising application deployed along a road for communication, safety and emergency information delivery, data collection, and entertainment. The network efficiency and stability are of great concern. We devote to achieve the communication quality by appropriate gateways. The channel randomness is taken into account in the wireless network, because it can affect the stability of the communication link. We model the wireless channels to analyze the VANET efficiency, then propose an efficient gateway selection mechanism based on multiple metrics: correctly decoded probability, network delay and relative velocity. These metrics are calculated by the Simple Additive Weighting (SAW) technique to choose the optimum gateway nodes. Simulation results show that our scheme can improve the quality of the VANET-3G network by analysis and compare.