Abstract
In recent years, vehicle-to-vehicle communicaion systems which give assistance for safe driving have received a great deal of public attension. Millimeter wave has been examined as the primary candidate for the communication medium in vehicle-to-vehicle communications. However, it is impossible to form a direct communication link with vehicles located behind other vehicles due to the sharp directivity of the medium. Therefore, the packet relay function is required in vehicle-to-vehicle communications. In this paper, a packet relay timing control protocol for vehicle-to-vehicle communications is proposed. In this protocol, the packet relay timing of each car is self-controlled. Simulation results show that the proposed protocol outperforms the flooding protocol at the packet unreachable probability.
