Uplink power control for Device to Device communication underlaying cellular networks

Device-to-Device (D2D) communication underlaying cellular networks efficiently enhances the network throughput and spectrum efficiency when sharing cellular resources. However, the interference between D2D users and cellular users on the same resource may decrease the performance of the whole network. In this paper, we propose a method to overcome this defect: when D2D users reuse the resources of cellular user in uplink, there are two pairs of interference between D2D users and cellular user, one is from D2D users to cellular user, the other is from cellular user to D2D users. We take the D2D and cellular users into account simultaneously to reduce the mutual interference by adjusting their transmitting power. The proposed algorithm coordinates the transmitting power of D2D and cellular users to maximize the throughput of the whole cell and guarantee their respective QoS (quality of service). Simulation results present that the proposed scheme significantly improves the total throughput of cellular and D2D networks and maintains low interference between D2D users and cellular users.