6G智能超表面技术应用与挑战

Applications and Challenges of Reconfigurable Intelligent Surface for 6G Networks

智能超表面(Reconfigurable Intelligent Surface,RIS)因为其能够灵活操控信道环境中的电磁特性,在学术研究及产业推进上发展迅速,被认为是5G⁃Advanced和6G网络的关键候选技术之一。RIS通过其人为灵活异常调控无线电波传输的能力,有机会构建一个智能的无线电磁环境。RIS的引入可能构建全新的网络范式,在给未来网络带来全新可能的同时,也导致了诸多全新的技术及工程应用挑战。该综述首先从新的角度介绍了RIS使能未来无线通信网络的主要方面,然后重点对RIS引入后面临的关键挑战进行了探讨。归纳汇总了RIS网络面临的主要工程化应用技术挑战,并对其中信道降秩、网络间共存、网络内共存、网络部署等几方面的关键技术挑战进行了深入分析和探讨,提出可能的解决方案。

Reconfigurable intelligent surface(RIS)has attracted the attention of academia and industry as soon as it appears because it can flexibly manipulate the electromagnetic characteristics of wireless channel.Especially in the past one or two years,RIS has been growing rapidly in academic research and industry promotion and is one of the key candidate technologies for 5G-Advanced and 6G networks.RIS can build a smart radio environment through its ability to regulate radio wave transmission in a flexible way.The introduction of RIS may create a new network paradigm,which brings new possibilities to the future network,but also leads to many new challenges in technological and engineering applications.This paper first introduces the main aspects of RIS enabled wireless communication network from a new perspective,and then focuses on the key challenges faced by the introduction of RIS.This paper briefly summarizes the main engineering application challenges faced by RIS networks,and further analyzes and discusses several key technical challenges among of them in depth,such as channel degradation,network coexistence,network coexistence and network deployment,and proposes possible solutions.