CII：面向多用户下一代网络中预编码与可重构智能表面联合上报的新型CSI-RS度量
CII: Novel CSI-RS Metric for Joint Precoder and RIS Reporting in Multi-User NextG Networks
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中文总结 AI 辅助
该研究针对NextG网络中RIS与基站预编码联合上报的高开销问题，提出新型CII指标，可整合两类配置的单一反馈，既降开销又优性能，是兼容标准的RIS集成方案。
中文摘要 AI 辅助
可重构智能表面（RIS）是下一代（NextG）无线网络的关键使能技术之一，但基站（BS）主动预编码与无源RIS配置的联合反馈上报因信令开销过大仍是重大挑战。本文在兼容标准的信道状态信息参考信号框架基础上，提出新型信道信息指示器（CII），该指标可在多用户多输入单输出系统中，将基站主动预编码矩阵与无源RIS配置整合为单一反馈度量。仿真结果表明，与传统分离上报方案相比，所提统一反馈框架能显著降低上行信令开销；尽管反馈负载仅小幅增加，基于CII的方案在系统性能上仍优于传统预编码矩阵指示方法，为NextG无线网络中RIS的集成提供了兼容标准的实用解决方案。
英文摘要
While reconfigurable intelligent surfaces (RISs) are among the key enablers for next-generation (NextG) wireless networks, efficient feedback reporting for joint base station (BS) precoding and passive RIS configuration remains a major challenge due to the associated signaling overhead. By extending the standard-compliant channel state information reference signal framework, this paper introduces a novel channel information indicator (CII) that jointly represents the active BS precoding matrix and passive RIS configuration within a single feedback metric for multi-user multiple-input single-output systems. Simulation results demonstrate that the proposed unified feedback framework significantly reduces uplink signaling overhead compared with conventional disjoint reporting schemes. Furthermore, despite only a modest increase in the feedback payload, the proposed CII-based scheme outperforms conventional precoding matrix indicator approaches in terms of system performance, offering a practical and standards-compatible solution for RIS integration in NextG wireless networks.
