WAVE Based Architecture for Safety Services Deployment in Vehicular Networks

Vehicle manufacturers, highway concessionaries, governments and academic research are cooperating to find the best solution to add safety services relying on vehicle to vehicle communication systems (V2V) and among vehicles and the infrastructure (V2I) located on the roadside. Safety services, such as collision or sudden hard braking warning have delay-critical requirements. This paper proposes a WAVE (Wireless Access for Vehicular Environment) based model and a MAC protocol to disseminate time-critical messages for safety services in highways where the Road Side Units (RSUs) are not present in the instant a safety event is generated and, consequently, the message dissemination is done only through vehicles. The model allows to determine the retransmission slot number and the model's feasibility is somewhat evaluated by analysing the maximum number of available slots for a typical scenario.