Reconfigurable Intelligent Surface-Aided Multi-User Networks: Interplay Between NOMA and RIS

Liu Y, Mu X, Liu X, Di Renzo M, Ding Z, Schober R (2022)

Publication Type: Journal article

Publication year: 2022

Journal

IEEE Wireless Communications IEEE

Book Volume: 29

Pages Range: 169-176

Journal Issue: 2

DOI: 10.1109/MWC.102.2100363

Abstract

This article focuses on the exploitation of reconfigurable intelligent surfaces (RISs) in multiuser networks employing orthogonal multiple access (OMA) or non-orthogonal multiple access (NOMA), with an emphasis on investigating the interplay between NOMA and RIS. Depending on whether the RIS reflection coefficients can be adjusted only once or multiple times during one transmission, we distinguish between static and dynamic RIS configurations. In particular, the capacity region of RIS-aided single-antenna NOMA networks is discussed and compared with the OMA rate region from an information-theoretic perspective, revealing that the dynamic RIS configuration is capacity-achieving. Then, the impact of the RIS deployment location on the performance of different multiple access schemes is investigated, which reveals that asymmetric and symmetric deployment strategies are preferable for NOMA and OMA, respectively. Furthermore, for RIS-aided multiple-antenna NOMA networks, three novel joint active and passive beamformer designs are proposed based on both beamformer-based and cluster-based strategies. Finally, open research problems for RIS-NOMA networks are highlighted.

Authors with CRIS profile

Robert Schober Lehrstuhl für Digitale Übertragung

Involved external institutions

Queen Mary, University of London GB United Kingdom (GB) École Polytechnique - Université Paris-Saclay FR France (FR) University of Manchester GB United Kingdom (GB) Beijing University of Posts and Telecommunications (BUPT) / 北京邮电大学 CN China (CN)

How to cite

APA:

Liu, Y., Mu, X., Liu, X., Di Renzo, M., Ding, Z., & Schober, R. (2022). Reconfigurable Intelligent Surface-Aided Multi-User Networks: Interplay Between NOMA and RIS. IEEE Wireless Communications, 29(2), 169-176. https://doi.org/10.1109/MWC.102.2100363

MLA:

Liu, Yuanwei, et al. "Reconfigurable Intelligent Surface-Aided Multi-User Networks: Interplay Between NOMA and RIS." IEEE Wireless Communications 29.2 (2022): 169-176.

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