Traffic-aware resource allocation for full duplex wireless networks

Abstract

With simultaneous transmission on both uplink and downlink within the same band, full duplex (FD) wireless communication is an emerging technique for next generation networks to significantly improve network throughput and spectrum efficiency. The symmetric capacity in the FD wireless network come from the same throughput obtained in both uplink and downlink with the same bandwidth. However, it will waste lots of radio resources for transmitting asymmetric traffic in the FD wireless network with the symmetric capacity. Moreover, residual self-interference (SI) from imperfect self interference cancelling in the FD wireless network can significantly decrease the uplink throughput. To tackle the above challenges, we propose a full duplex multi-subcarrier aggregation transmission (FD-MST) analytical model for residual SI enabled FD wireless systems. Based on the FD-MST model, we formulate a resource allocation problem in the FD wireless network with asymmetric traffic. To solve the original NP-hard problem, we propose a two-stage suboptimal scheme. Simulation results show that there is at least a 77.3% increase in the network throughput under the proposed scheme compared to those of the existing schemes.