Enhancement AODV Routing Protocol at the VANET within an Urban Scenario

Abstract

a vehicular ad hoc network (VANET) is a potential technology for supporting communication in vehicle-to-vehicle as well as vehicle-to-roadside units. Because of high mobility and periodic variations in the design of networks, creating a reliable routing strategy for these networks is one of the key challenges in VANETs. The Ad Hoc On-Demand Distance Vector (AODV) routing protocol's scalability and on-demand route discovery technique make it a popular choice in VANETs. However, AODV has limitations that might impair the performance of VANETs, including major control overhead and higher delays throughout the network. This work introduces an improved AODV routing protocol created especially for the VANETs. This paper analyzes the impacts of modifying the Contention Window (CW) settings for the density to discover ways to enhance the performance of the 802.11p transmission about receiving probabilities and latency. We show that the proposed CW specified in the IEEE 802.11p standard works well in almost all evaluated situations. The proposed protocol (P-AODV) also demonstrates robustness in extremely dynamic settings involving a range of traffic densities and patterns of movement.