Exploiting NLOS Links for Energy-Efficient Opportunistic Routing in IoV
摘要
As the electric vehicle (EV) market expands, the scarcity of charging stations often leads to extended wait times and difficulties in accessing available charging points. In the context of Internet of Vehicles (IoV) routing, where energy efficiency is paramount, we explore the potential of Non-Line of Sight (NLOS) links in opportunistic routing to enhance communication and energy savings. Specifically, despite the attenuation caused by viaduct surfaces on NLOS links, selecting NLOS links can enhance energy efficiency when options within Line of Sight (LOS) are limited or distant. Traditional energy-efficient routing approaches in IoV typically overlook the utility of NLOS links. This paper introduces a mixed-link algorithm that optimizes throughput and energy consumption by incorporating NLOS links. We develop a hybrid link model that includes both LOS and NLOS transmissions and formulate a problem that is subsequently restructured into a solvable format. Our proposed Hybrid Link Energy-Optimized Routing (HEOR) algorithm leverages the Dinkelbach method to enhance routing efficiency. Simulation results indicate that HEOR surpasses existing energy-efficiency schemes in throughput, packet delivery ratio, and energy efficiency by effectively utilizing NLOS links.