An efficient next hop selection scheme for enhancing routing performance in vanets

Abstract

Link stability is one of the key parameters for routing in vehicular ad hoc networks. Estimating this metric basing only on the mobility parameters, and disregarding the impact of the wireless fading channel may cause degradation in the routing performance. In this paper, when channel fading is taken into consideration, we propose to estimate first communication range, where the fading is above some threshold, and then use it to measure link stability. A novel estimated stability metric will be combined with link signal received quality to select potential next hop, in order to make paths selected from vehicles to Internet gateway more reliable in the network. The proposed approach is compared with an existing mobility parameter based stability routing protocol. The results show that there is a significant improvement in routing performance in term of throughput and overhead.