基于非对角可重构智能表面状态切换策略的自适应传输协议
An Adaptive Transmission Protocol Enabled by The State Switching Strategy of Beyond-Diagonal RIS
浏览论文内容
中文总结 AI 辅助
研究针对BD-RIS在某些场景下性能增益与操作复杂性问题，提出一种自适应传输方案，定义其开启和关闭两种状态，设计波束训练协议并构建决策阈值，能依实时信道条件智能切换状态，确保成功传输。
中文摘要 AI 辅助
得益于元件间互连和灵活的元件布置，非对角可重构智能表面（BD-RIS）突破了传统RIS的限制，实现了性能增强和覆盖范围扩大。然而，现有BD-RIS研究假设其始终开启以辅助传输，而在发射机-接收机直接链路存在且较强的某些场景中，BD-RIS的性能增益可能无法证明其操作复杂性的合理性。为了智能地使用BD-RIS，本文提出了一种新颖的自适应传输方案。该方案首先定义了BD-RIS的两种工作状态，即开启和关闭。基于这两种状态，设计了一种新的波束训练协议，使BD-RIS能够根据实时信道条件智能地切换其工作状态。此外，构建了一个决策阈值作为状态切换的决策依据，以确保协议执行的效率和可靠性。仿真结果表明，所提出的协议无需始终开启BD-RIS并进行复杂的波形操作，无论发射机-接收机链路是否强大，都能保证成功传输。
英文摘要
Thanks to inter-element interconnections and flexible element arrangements, the beyond diagonal reconfigurable intelligent surface (BD-RIS) breaks through the limitation of traditional RIS to achieve enhanced performance and enlarged coverage. However, existing BD-RIS research assumes that BD-RIS is always turned ON to assist transmission, while, in some scenarios where the transmitter-receiver direct link exists and remains strong, the performance gains of BD-RIS may not justify its manipulation complexity. In order to smartly use BD-RIS, a novel adaptive transmission scheme is proposed in this paper. The proposed scheme first defines two working states of the BD-RIS, namely ON and OFF. Based on these two states, we design a new beam training protocol that enables BD-RIS to intelligently switch its working state according to real-time channel conditions. Furthermore, we construct a decision threshold as the decision basis for state switching to ensure the efficiency and reliability of protocol execution. Simulation results show that, without always turning ON the BD-RIS and performing sophisticated wave manipulation, the proposed protocol can guarantee successful transmission regardless of whether there is a strong transmitter-receiver link or not.
