Enablers for Efficient Wi-Fi Sensing

Wireless fidelity (Wi-Fi) technology gained popularity due to its ability to provide reliable connectivity, enabling high-speed communication and information sharing. However, in recent years, the focus has shifted from mere communications to sensing and awareness of the environment that can be attained using the same communication signals. Along with this line, there are wide varieties of promising sensing applications, such as crowd counting, person tracking, and sick person detection. However, different sensing applications require different performance and quality of service metrics, so it is difficult to enable all of these applications simultaneously. In this paper, we highlight the importance of the usage of flexible and adaptable Wi-Fi sensing parameters for different applications, environments, and scenarios. Afterward, we introduce our perspective for efficient Wi-Fi sensing through a framework. The first aspect of this framework is about flexible and adaptable transmission design. The second one is about identifying sensing applications according to frame design. In the last aspect of the framework, multi-access point coordination is highlighted in different scenarios ofWi-Fi sensing.