User Scheduling and Optimal Power Allocation for Full-Duplex Cellular Networks

TL;DR

This paper develops low complexity user scheduling algorithms and derives optimal power allocation strategies for full-duplex cellular networks, enhancing system sum rate by intelligently switching between FD and HD modes based on channel conditions.

Contribution

It introduces novel user scheduling algorithms combined with optimal power control and mode switching metrics for FD systems, with analytical performance evaluation.

Findings

Algorithms improve sum rate performance.

Optimal power control enhances system efficiency.

Mode switching based on metrics boosts throughput.

Abstract

The problem of user scheduling and power allocation in full-duplex (FD) cellular networks is considered, where a FD base station communicates simultaneously with one half-duplex (HD) user on each downlink and uplink channel. First, we propose low complexity user scheduling algorithms aiming at maximizing the sum rate of the considered FD system. Second, we derive the optimal power allocation for the two communication links, which is then exploited to introduce efficient metrics for FD/HD mode switching in the scheduling procedure, in order to further boost the system rate performance. We analyze the average sum rate of the proposed algorithms over Rayleigh fading and provide closed-form expressions. Our representative performance evaluation results for the algorithms with and without optimal power control offer useful insights on the interplay among rate, transmit powers, self-interference (SI) cancellation capability, and available number of users in the system.