Energy-Efficient Resource Reuse Scheme for D2D Communications Underlaying Cellular Networks

This letter investigates energy-efficient downlink resource reuse strategies for device-to-device (D2D) communications underlying cellular networks. We aim to maximize the total energy efficiency of all D2D links while guaranteeing the quality of service of cellular users (CUs) and the power requirements for both base station and D2D links. Based on the analysis of the characteristics of optimal joint power control and D2D-CU matching strategy, we propose an energy-efficient iterative algorithm for D2D communications. Simulation results show that the proposed energy-efficient downlink resource reuse strategy achieves higher energy efficiency of D2D communications than existing schemes.

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