Dynamic Scheduling for Enhanced Performance in RIS-assisted Cooperative Network with Interference

TL;DR

This paper proposes a dynamic scheduling scheme for RIS-assisted cooperative networks with FlexD, demonstrating improved throughput and interference management through analytical modeling and comparison with traditional systems.

Contribution

It introduces a user-pair selection scheme leveraging RIS and dynamic scheduling to maximize throughput without full interference CSI, with analytical insights into spatial correlation effects.

Findings

FlexD outperforms FD and HD in throughput and energy efficiency.

Analytical framework evaluates throughput outage probability with RIS-induced spatial correlation.

Simulation results confirm the effectiveness of the proposed scheduling in interference scenarios.

Abstract

Reconfigurable Intelligent Surfaces (RIS) have emerged as transformative technologies, enhancing spectral efficiency and improving interference management in multi-user cooperative communications. This paper investigates the integration of RIS with Flexible-Duplex (FlexD) communication, featuring dynamic scheduling capabilities, to mitigate unintended external interference in multi-user wireless networks. By leveraging the reconfigurability of RIS and dynamic scheduling, we propose a user-pair selection scheme to maximize system throughput when full channel state information (CSI) of interference is unavailable. We develop a mathematical framework to evaluate the throughput outage probability when RIS introduces spatial correlation. The derived analytical results are used for asymptotic analysis, providing insights into dynamic user scheduling under interference based on statistical channel knowledge. Finally, we compare FlexD with traditional Full Duplex (FD) and Half Duplex (HD) systems against RIS-assisted FlexD. Our results show FlexD's superior throughput enhancement, energy efficiency and data management capability in interference-affected networks, typical in current and next-generation cooperative wireless applications like cellular and vehicular communications.