Given the fact that WiFi-based sensing can be realized through the reuse of WiFi communication facilities and frequency bands, integrated sensing and communication (ISAC) emerges as a pivotal direction for future WiFi standards, such as IEEE 802.11bf. Traditional WiFi sensing systems extract channel state information (CSI) from exclusive WiFi packets to quantify the characteristics of the sensing target. This poses challenges for existing WiFi systems originally designed for communication purposes, as it demands high-quality and sufficient CSI measurements. In this paper, we propose SenCom as a step towards forward-compatible ISAC solution. SenCom extracts CSI from general WiFi packets, enabling CSI calibration across different WiFi communication modes and delivering quality CSI measurements for upper-layer sensing applications. A fitting-resampling scheme and an incentive strategy are also developed. The former one is to obtain evenly sampled CSI with consistent dimensionality and the latter one is to guarantee sufficient CSI measurements over time. We build a prototype of SenCom and conduct extensive experiments involving 15 participants. The results show that SenCom’s competence for a variety of sensing tasks while making minimal compromises to WiFi communication performance.

中文翻译：

---

适用于 WiFi 的前向兼容集成传感和通信


鉴于基于 WiFi 的传感可以通过复用 WiFi 通信设施和频段来实现，集成传感与通信 (ISAC) 成为未来 WiFi 标准（例如 IEEE 802.11bf）的关键方向。传统的 WiFi 传感系统从专用 WiFi 数据包中提取信道状态信息 (CSI)，以量化传感目标的特征。这对最初设计用于通信目的的现有 WiFi 系统提出了挑战，因为它需要高质量和足够的 CSI 测量。在本文中，我们建议 SenCom 作为向前兼容 ISAC 解决方案的一步。 SenCom 从通用 WiFi 数据包中提取 CSI，从而能够跨不同 WiFi 通信模式进行 CSI 校准，并为上层传感应用提供高质量的 CSI 测量。还制定了拟合重采样方案和激励策略。前者是为了获得具有一致维度的均匀采样的 CSI，后者是为了保证随着时间的推移有足够的 CSI 测量。我们构建了 SenCom 原型并进行了涉及 15 名参与者的广泛实验。结果表明，SenCom 能够胜任各种传感任务，同时对 WiFi 通信性能的影响最小。