Dynamic Uplink/Downlink Resource Management in Flexible Duplex-Enabled Wireless Networks

Flexible duplex, that enables dynamic uplink and downlink resource allocation in the joint time-frequency domain, is proposed to adapt to the channel and traffic asymmetry for future wireless networks [1]. In this paper, we propose two novel algorithms within the flexible duplex framework, named successive approximate fixed point (SAFP) and its enhanced version resource muting for dominant interferer (RMDI), for joint uplink and downlink resource allocation, based on the awareness of interference coupling among service links in multicell scenario. Numerical results show significant performance gain over the baseline system with fixed uplink/downlink resource configuration, and over the dynamic time division duplex (TDD) scheme that adapts the configuration to traffic load independently in each cell. The proposed algorithms achieve 2-fold performance gain when compared with the baseline scheme, measured by the worst-case quality of service satisfaction level, under a low level of traffic asymmetry. The gain is even more significant when the traffic is highly asymmetric, as it achieves 3-fold increase.