A Wi-Fi access point (AP) is a networking hardware device that transmits and receives radio frequency signals conforming to IEEE 802.11 standards, enabling wireless connectivity between client devices and a broader network infrastructure. In CSI-based sensing research, APs serve a dual role as both communication infrastructure and passive or active sensing nodes, since the channel state information extracted from their transmissions encodes fine-grained environmental changes such as human presence, movement, and crowd density. Key variants include dedicated commercial APs, software-defined radio platforms repurposed as APs, and, in the context of emerging 6G Integrated Sensing and Communications frameworks, next-generation dual-functional APs capable of simultaneously performing radar-style environmental sensing and conventional data communication within a unified hardware architecture.
Source Papers
- Channel State Information from Pure Communication to Sense and Track Human Motion: A Survey ↗ — Channel State Information from Pure Communication to Sense a
- CrossSense: Towards Cross-Site and Large-Scale WiFi Sensing ↗ — CrossSense: Towards Cross-Site and Large-Scale WiFi Sensing
- Guiding Wi-Fi Sensor Placement for Enhanced CSI-Based Sensing in Stationary Crowd Counting ↗ — Guiding Wi-Fi Sensor Placement for Enhanced CSI-Based Sensin
- Integrated Sensing and Communications: Toward Dual-Functional Wireless Networks for 6G and Beyond ↗ — Integrated Sensing and Communications: Toward Dual-Functiona
- RSSI-Assisted CSI-Based Passenger Counting with Multiple Wi-Fi Receivers ↗ — RSSI-Assisted CSI-Based Passenger Counting with Multiple Wi-
- Sensing Technologies for Crowd Management, Adaptation, and Information Dissemination in Public Transportation Systems: A Review ↗ — Sensing Technologies for Crowd Management, Adaptation, and I
- Time matters: Empirical insights into the limits and challenges of temporal generalization in CSI-based Wi-Fi sensing ↗ — Time matters: Empirical insights into the limits and challen