Joint Resource Allocation and Power Control Scheme for Device-to-Device Communication Underlaying Cellular Networks

Device-to-device (D2D) communication is a promising technique of future cellular networks which can improve the system throughput and extend the battery lifetime of user equipments. However, enabling D2D communications in a cellular network causes interference because of spectrum sharing. In this paper, to mitigate the interference and make full use of the advantage of D2D communications, we propose a joint spectrum resource allocation and power control (RAPC) scheme to maximize the total throughput while guaranteeing the minimum required rate for both D2D users and cellular users. We formulate the optimization problem of resource allocation and power control and we obtain the near-optimal solution by quantum particle swarm optimization (QPSO) method, in which the quantum particles represent the solutions of resource allocation and power control. A penalty function is formulated to delete the infeasible solutions. Simulation results show that the proposed scheme has a better performance on system throughput, power efficiency and minimum rate satisfactory than other schemes.