Selection of cooperative partner in vehicle-to-vehicle communication

In this paper, we introduce the cooperative diversity (CD) into the vehicle to vehicle (V2V) communications. Selecting only the best cooperative partner is feasible in order to improve the system performance, combate the multi-path fading and reduce the interferences to others' communications. Because of the moving (especially fast) of the vehicle, the Doppler shift must be considered in the V2V. And as the distance is a key factor in path loss propagation,the cooperative partner's distance also should be considered Considering both the distance and the relative velocity, we give the method based on the metric of average BER to select the best cooperative partner in the V2V communication as the channel models are both Ricean fading between S-R(source-relay)and R-D(relay-destination). We give the theoretic illustration. The analytical result and simulations show: the mean is the best, mean location with the mean velocity simultaneously.