Resource Allocation for Wireless Powered Multi-Pair Two-Way Relay Networks

Abstract

We consider a wireless powered multi-pair two-way relay network in which the devices without batteries communicate with their partners assisted by a hybrid access point (HAP). For the network, half-duplex (HD) and full-duplex (FD) protocols are designed in a time division multiple access manner and power and time allocation problems are addressed. The problems optimize a generalized utility function taking into account the efficiency and fairness under the power constraints at the HAP and the energy storage constraint at the devices. We transform the problems for the HD and the FD with no self-interference (SI) into the convex problems while providing an iterative algorithm to solve the non-convex problem for the FD suffered from the residual SI. The results confirm the superiority of the FD over the HD in the throughput and the fairness.