Multihop V2I Communications: A Feasibility Study, Modeling, and Performance Analysis
Abstract: In typical wireless networks, multihop communication is a method used to establish connectivity between distant nodes. Adapting this technique to vehicular networks requires bypassing several challenging constraints imposed by the nature of vehicular environments (e.g., high mobility and speeds speed and repetitive link disruptions). This paper revolves around establishing a multihop connectivity path between an isolated source vehicle S and a faraway gateway roadside unit (RSU) D through cooperative vehicles serving as intermediate relays. A stochastic tic model is formulated for the purpose of deriving an expression for the probability of the existence of a connectivity path between S and D. Then, the dynamic changes in the network topology are carefully examined to present a tight upper bound for the average a end-to-end end packet delivery delay. Finally, taking into account the inherent contention contention-based based nature of the employed IEEE 802.11p medium access control (MAC) protocol, together with several other limiting factors such as relay unavailability and hidden hidden terminals, the per-hop per and the end-to-end end throughput expressions are presented. Extensive simulations are conducted for the purpose of validating the proposed model and examining the system's performance.