AI 中文总结
本文针对带无电池被动覆盖层的Wi-Fi 8启发下行MU-MIMO系统，优化探测后传输间隔，经数据驱动搜索确定最优间隔，为可靠低功耗MU-MIMO WLAN提供设计指导。
AI 中文摘要
无电池覆盖层将被动吞吐量与Wi-Fi探测开销及信道状态信息（CSI）老化关联。本文研究受Wi-Fi 8/IEEE 802.11bn启发的下行多用户多输入多输出（MU-MIMO）系统中，带无电池被动覆盖层的超高可靠性（UHR）操作的信道探测。我们优化探测后传输间隔，以最大化主动Wi-Fi链路与被动链路的总吞吐量，同时综合考虑探测开销、CSI老化、调制与编码方案（MCS）、被动衰减及被动数据速率。采用数据包级跨层模型评估周期平均吞吐量，通过数据驱动搜索确定不同工作条件下的最优间隔。仿真表明，被动覆盖层改变了传统探测的权衡关系：根据MCS和被动链路配置，额外被动吞吐量可能或无法补偿相关Wi-Fi可靠性损失，导致最优间隔偏移。研究结果为可靠低功耗MU-MIMO无线局域网提供设计指导。
英文摘要
Batteryless overlays couple passive throughput to Wi-Fi sounding overhead and channel state information (CSI) aging. This paper investigates channel sounding for ultra-high reliability (UHR) operation in a Wi-Fi 8/IEEE 802.11bn-inspired downlink multi-user multiple-input multiple-output (MU-MIMO) system with a batteryless passive overlay. We optimize the post-sounding transmission interval to maximize the aggregate throughput of the active Wi-Fi and passive links, while jointly accounting for sounding overhead, CSI aging, modulation and coding scheme (MCS), passive attenuation, and passive data rate. A packet-level cross-layer model evaluates the cycle-average throughput, and a data-driven search identifies the optimal interval under different operating conditions. Simulations demonstrate that passive overlay reshapes the conventional sounding tradeoff: depending on the MCS and passive-link configuration, the additional passive throughput may or may not compensate for the associated Wi-Fi reliability loss, causing the optimal interval to shift. The results provide design guidance for reliable and low-power MU-MIMO WLANs.
CommentsThis work has been accepted to the 2026 IEEE/CIC International Conference on Communications in China (ICCC Workshops).6 pages,4 figures,conference paper
