Joint Power and Time Resource Optimization in Full-Duplex Wireless-Powered Communication Networks

摘要

Full-duplex wireless-powered communication networks (FD-WPCNs) permit wireless devices (WDs) to transmit information while simultaneously harvesting energy from radio signals. This paper studies the protocol designs for fair resource allocation in FD-WPCNs. We design a Harvest-and-Transmit protocol to coordinate information transmission and energy harvesting in FD-WPCNs. Based on this protocol, the sum-capacity maximization problem under the minimum user rate constraint and the max-min rate optimization problem are formulated in the FD-WPCN with an information access point (IAP) that is separate from the energy access point (EAP). Using the difference of convex programming (DCP), iterative algorithms with low computational complexity are designed to obtain the global optimal solution, and their convergence is proven. Simulation results indicate that an FD-WPCN can achieve double the throughput compared with that of a half-duplex WPCN. Moreover, the proposed iterative algorithms are able to achieve the performance nearly identical to the theoretical upper bound.