Throughput Maximization of Flexible Duplex Networks with an In-Band Full-Duplex UAV-BS

Flexible duplex is regarded as a promising technology for the fifth generation (5G) and beyond networks. In flexible duplex networks, communication nodes are capable of changing uplink and downlink traffic adaptively to improve communication resource management. In this article, we employ an in-band full-duplex (IBFD) unmanned aerial vehicle (UAV) serving as a base station (BS) to improve the performance of flexible duplex networks. In order to maximize the system throughput, we formulate an optimization problem by jointly designing the uplink/downlink scheduling, power allocation and UAV trajectory. Sequential parametric convex approximation (SPCA) and successive convex approximation (SCA) methods are utilized to provide an efficient solution for this highly non-convex problem. Furthermore, numerical simulation results show that our algorithm improves the system throughput compared to other designs.