TeraRIS NOMA-MIMO Communications for 6G and Beyond Industrial Networks

TL;DR

This paper proposes a RIS-assisted NOMA-MIMO framework utilizing Terahertz bands to improve spectral efficiency, coverage, and reliability for 6G industrial networks, with optimized power allocation strategies and validated performance gains.

Contribution

It introduces a novel joint framework combining RIS, NOMA, and THz communications for industrial networks, including optimized power allocation strategies and performance validation.

Findings

Up to 23% sum rate gain over fixed power allocation at 30 dBm.

Enhanced spectral efficiency, coverage, and reliability demonstrated.

Simulation validates theoretical analysis and robustness.

Abstract

This paper presents a joint framework that integrates reconfigurable intelligent surfaces (RISs) with Terahertz (THz) communications and non-orthogonal multiple access (NOMA) to enhance smart industrial communications. The proposed system leverages the advantages of RIS and THz bands to improve spectral efficiency, coverage, and reliability key requirements for industrial automation and real-time communications in future 6G networks and beyond. Within this framework, two power allocation strategies are investigated: the first optimally distributes power between near and far industrial nodes, and the second prioritizes network demands to enhance system performance further. A performance evaluation is conducted to compare the sum rate and outage probability against a fixed power allocation scheme. Our scheme achieves up to a 23% sum rate gain over fixed PA at 30 dBm. Simulation results validate the theoretical analysis, demonstrating the effectiveness and robustness of the RIS-assisted NOMA MIMO framework for THz enabled industrial communications.