In the modern landscape of wireless communications, multi-hop, high-bandwidth, indoor Terahertz (THz) wireless communications are gaining significant attention. These systems couple Reconfigurable Intelligent Surface (RIS) and relay devices within the emerging 6G network framework, offering promising solutions for creating cell-less, indoor, and on-demand mesh networks. RIS devices are especially attractive, constructed by an array of reflecting elements that can phase shifts, such that the reflecting signals can be focused, steered, and the power of the signal enhanced towards the destination. This paper presents an in-depth, analytical examination of how path allocation impacts interference within such networks. We develop the first model which analyzes interference based on the geometric parameters of beams (conic, cylindrical) as they interact with RIS, User Equipment (UE), and relay devices. We introduce a transmission scheduling heuristic designed to mitigate interference, alongside an efficient optimization method to maximize throughput. Our performance results elucidate the interference's effect on communication path quality and highlight effective path selection strategies with throughput maximization.

翻译：在现代无线通信的格局中，多跳、高带宽的室内太赫兹（THz）无线通信正受到广泛关注。这些系统将可重构智能表面（RIS）和中继设备耦合到新兴的6G网络框架中，为创建无小区、室内、按需的网格网络提供了有前景的解决方案。RIS设备尤其具有吸引力，它由一系列反射单元构成，能够调整相位偏移，从而聚焦、引导反射信号并增强其朝向目的地的功率。本文深入分析了路径分配如何影响此类网络中的干扰。我们首次建立了基于光束（锥形、圆柱形）与RIS、用户设备（UE）及中继设备相互作用时几何参数来分析干扰的模型。我们提出了一种旨在减轻干扰的传输调度启发式算法，并辅以一种高效的优化方法来最大化吞吐量。我们的性能结果阐明了干扰对通信路径质量的影响，并强调了结合吞吐量最大化的有效路径选择策略。