Downlink Performance Analysis of the Full-Duplex Networks With Interference Cancellation

In this paper, the downlink outage performance of full-duplex (FD) multi-cell networks considering interference cancellation at receivers is investigated. Different from previous FD cellular works, where all the interference is assumed to be perfectly cancelled, we propose the concept of strong interference region to distinguish strong interference and weak interference. A practical interference cancellation scheme is proposed to suppress the strong interference. Instead of assuming full-loaded cells in the analysis on FD networks, we consider the dynamic traffic request of the users in the stochastic networks where the cells may not always actively transmit and/or receive signals, consequently they do not always introduce interference to others. The probabilities of base stations (BSs) working in the FD, downlink, uplink and idle modes have been derived. To evaluate the system performance, we derive the outage probability and throughput. The simulation results show that outage performance is significantly improved compared to that without interference cancellation. Meanwhile, after cancelling the strong interference, the performance approaches that of cancelling all the interference. The impacts of the number of user equipments (UEs), the traffic request rate, the density of BSs and the size of the strong interference region on outage performance and throughput performance are further revealed.