Performance Optimization Based on Relay-Aided Mode in Device-To-Device Communication

Once the direct communication conditions are not satisfied between D2D pairs, relay-aided mode may play an important role in enhancing the reliability and reducing the transmit power of D2D communications. In order to obtain the maximum system capacity with a low computation complexity, this paper proposes a novel scheme by considering interference limit, optimal relay selection based on delineated area and optimal link selection based range division. Simulation results reveal that the proposed scheme is capable of substantially improving the system performance and reducing the computational complexity compared with either the existing brute- force technique or the area-division scheme.