Time-division cellular networks with full-duplex base stations

Abstract

A joint user pairing and resource allocation algorithm is proposed to maximize the system throughput in a time-division (TD) cellular network while guaranteeing the quality-of-service (QoS) requirement of users. Full-duplex communication (FDC) is enabled at the base station (BS) with imperfect self interference (SI) cancellation while the user equipments can only work in the traditional half-duplex way because of hardware limitation. We first formulate a nonconvex optimization problem and then utilize the constrained concave-convex procedure (CCCP) to develop a suboptimal solution. A two-step heuristic algorithm with low computational complexity is also proposed. Numerical results show that both user diversity gain and full-duplex (FD) gain can be achieved and the performance of FDC highly depends on the strength of the residual self-interference.