Fog-Enabled Smart Home and User Behavior Recognition

One typical fog-enabled intelligent IoT system is the smart home, where each smart appliance/device is able to connect to the Internet and carry out some computing tasks. Each appliance/device can be viewed as an IoT node. These IoT nodes form a local network. To enable the home to better understand the humans and subsequently respond correctly, an efficient and secure human machine interact technology is necessary. Conventional remote controls are extremely inconvenient due to the larger number of appliances and the dependence on the hardware. A more efficient solution is to let the local network itself recognize the user behavior directly. Radio-based behavior recognition has advantages in smart home scenarios where comforts and privacy protection are of our major concern. Meanwhile, numerous wireless communications between the IoT nodes in the smart home also facilitate the implementation of these approaches. In this chapter, we will mainly focus on this type of behavior recognition. Besides, we can also take advantage of the acoustical signals to track the moving objects. Specifically, the speakers and microphones in cell phones can be employed to transmit and receive the sound signals. As accurate user behavior recognition becomes possible due to fog computing, our homes will surely become smarter and smarter.