  Full-duplex (FD) technology is envisaged as a key component for future mobile
broadband networks due to its ability to boost the spectral efficiency. FD
systems can transmit and receive simultaneously on the same frequency at the
expense of residual self-interference (SI) and additional interference to the
network compared with half-duplex (HD) transmission. This paper analyzes the
performance of wireless networks with FD multi-antenna base stations (BSs) and
HD user equipments (UEs) using stochastic geometry. Our analytical results
quantify the success probability and the achievable spectral efficiency and
indicate the amount of SI cancellation needed for beneficial FD operation. The
advantages of multi-antenna BSs/UEs are shown and the performance gains
achieved by balancing desired signal power increase and interference
cancellation are derived. The proposed framework aims at shedding light on the
system-level gains of FD mode with respect to HD mode in terms of network
throughput, and provides design guidelines for the practical implementation of
FD technology in large small-cell networks.
