Outage Performance Analysis of Cooperative D2D Communication

This study investigates the outage performance of cooperative device-to-device (D2D) communication reusing the uplink resource allocated to multiple cellular users which distribute uniformly in the cell. First, the explicit outage probability expressions for cooperative D2D with decode-and-forward (DF) and amplify-and forward (AF) relaying schemes are both provided. Then based on this, the effects of network parameters including transmit power and user locations on outage probabilities are explored. Accordingly, the criteria for relay selection in cooperative D2D is further proposed. Simulations and numerical results validate the derivations and analyses, and reveal that at the cell-edge, the cooperative D2D mode can achieve significant outage performance gains over the traditional direct D2D case without relay cooperation, even with less transmit power.