标题： 可重构智能表面用于6G非地面网络：从天空协助连接 显示英文标题

标题： Reconfigurable Intelligent Surfaces for 6G Non-Terrestrial Networks: Assisting Connectivity from the Sky

摘要： 本文研究了集成RIS的NTNs在革新下一代连接方面的潜力。 首先，它讨论了RIS技术的基本原理。 其次，它深入报道了RIS启用的NTNs的最新进展。 随后，它提出了一种基于当前最先进技术的框架，用于低地球轨道卫星（LEO）通信，其中用户终端接收到的信号同时经过直射链路和RIS链路，RIS安装在位于平流层内的高空平台（HAP）上。 最后，本文通过强调开放挑战和未来研究方向来总结对集成RIS的NTNs领域的革新。 显示英文摘要

摘要： This paper studies the potential of RIS-integrated NTNs to revolutionize the next-generation connectivity. First, it discusses the fundamentals of RIS technology. Secondly, it delves into reporting the recent advances in RIS-enabled NTNs. Subsequently, it presents a novel framework based on the current state-of-the-art for low earth orbit satellites (LEO) communications, wherein the signal received at the user terminal traverses both a direct link and an RIS link, and the RIS is mounted on a high-altitude platform (HAP) situated within the stratosphere. Finally, the paper concludes by highlighting open challenges and future research directions to revolutionize the realm of RIS-integrated NTNs.