Cooperative Relay Selection And Forwarding In Vehicle-To-Infrastructure Communications

The wireless sensors deployed at the highway can ensure the safety of the traveling vehicles. However, the ribbon deployed wireless sensor network in the roadside infrastructure can easily to generate energy hole. Cooperative communication between sensors and vehicles is an effective way to improve this situation and reduce the energy consumption of the sensors. A cooperative relay selection algorithm based on residence time (CRSR) and cooperative relay selection algorithms based on prediction (CRSP) are proposed in this paper. In order to improve the data transfer amount of the vehicle, residence time is considered in CRSR when sensors select the vehicles. To further improve energy efficiency CRSP considers arrival time of the vehicle to store collected data in the delay tolerance situation. Energy is also considered in CRSP to reduce the energy consumption and ease energy hole. Simulation results show that the CRSR and CRSP methods can reduce the energy consumption and prolong sensor network lifetime than the traditional algorithm.