4.7 Article

Wi-Fi Sensing Based on IEEE 802.11bf

期刊

IEEE COMMUNICATIONS MAGAZINE
卷 61, 期 1, 页码 121-127

出版社

IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/MCOM.007.2200347

关键词

Sensors; Wireless fidelity; Receivers; Protocols; Antenna measurements; Millimeter wave communication; Wireless sensor networks

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Wi-Fi radio signals are not only used for data transmissions, but also for sensing and identifying changes in the environment. The IEEE 802.11 bf Task Group aims to develop a new amendment to support Wi-Fi sensing in all spectrum bands, including sub-7 GHz and 60 GHz millimeter-wave bands.
Conventionally, Wi-Fi radio signals are widely used for data transmissions in a wireless local area network (WLAN). Recently, it has been an interesting topic to also apply Wi-Fi radio signals to sense the environment where these signals propagate and identify changes associated with certain activities. This technique is referred to as Wi-Fi sensing, and it has been proven effective in a variety of use cases, such as proximity detection, gesture recognition, target counting, and health monitoring. As a result, the IEEE 802.11 working group has formed a new Task Group, 802.11 bf, to develop a new amendment to define necessary PHY and MAC protocols to support Wi-Fi sensing in all spectrum bands, including sub-7 GHz bands (2.4 GHz, 5 GHz, and 6 GHz band), as well as 60 GHz millimeter-wave band. In this article, our primary goal is to identify and describe the basic elements that have been developed in IEEE 802.11 bf to enable Wi-Fi sensing applications in different WLAN scenarios.

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