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

TL;DR

This paper introduces two innovative algorithms, SAFP and RMDI, for joint uplink and downlink resource management in flexible duplex wireless networks, significantly improving performance over existing fixed and dynamic TDD schemes especially under high traffic asymmetry.

Contribution

The paper presents two novel algorithms, SAFP and RMDI, that leverage interference awareness for joint uplink/downlink resource allocation in multi-cell flexible duplex networks, outperforming baseline and TDD schemes.

Findings

Two-fold increase in QoS satisfaction over baseline with low traffic asymmetry.

Three-fold increase in QoS satisfaction under high traffic asymmetry.

Significant performance gains demonstrated through numerical results.

Abstract

Flexible duplex is proposed to adapt to the channel and traffic asymmetry for future wireless networks. In this paper, we propose two novel algorithms within the flexible duplex framework for joint uplink and downlink resource allocation in multi-cell scenario, named SAFP and RMDI, based on the awareness of interference coupling among wireless links. Numerical results show significant performance gain over the baseline system with fixed uplink/downlink resource configuration, and over the dynamic TDD scheme that independently adapts the configuration to time-varying traffic volume in each cell. The proposed algorithms achieve two-fold increase 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 more significant when the traffic is highly asymmetric, as it achieves three-fold increase.