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.
@article{arxiv.2309.06457,
title = {Opportunistic Reflection in Reconfigurable Intelligent Surface-Assisted Wireless Networks},
author = {Wei Jiang and Hans D. Schotten},
journal= {arXiv preprint arXiv:2309.06457},
year = {2023}
}
Comments
IEEE PIMRC 2023, Toronto, Canada. arXiv admin note: text overlap with arXiv:2303.09183. text overlap with arXiv:2309.06326