Abstract
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 applyWi-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, 802.11bf, to develop a new amendment to define necessary PHY and MAC protocols to supportWi-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 (mmWave) band. In this paper, our primary goal is to identify and describe the basic elements that have been developed in IEEE 802.11bf to enable Wi-Fi sensing applications in different WLAN scenarios.
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