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arXiv · 2309.06457

Opportunistic Reflection in Reconfigurable Intelligent Surface-Assisted Wireless Networks

Wei Jiang·Hans D. Schotten
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Abstract

This paper focuses on multiple-access protocol design in a wireless network assisted by multiple reconfigurable intelligent surfaces (RISs). By extending the existing approaches in single-user or single-RIS cases, we present two benchmark schemes for this multi-user multi-RIS scenario. Inspecting their shortcomings, a simple but efficient method coined opportunistic multi-user reflection (OMUR) is proposed. The key idea is to opportunistically select the best user as the anchor for optimizing the RISs, and non-orthogonally transmitting all users' signals simultaneously. A simplified version of OMUR exploiting random phase shifts is also proposed to avoid the complexity of RIS channel estimation.

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Wei Jiang, Hans D. Schotten. 2023-09-12. Opportunistic Reflection in Reconfigurable Intelligent Surface-Assisted Wireless Networks. https://arxiv.org/abs/2309.06457

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