A Study of an Environment Recognition Scheme Using WLAN CSI for Dynamic Spectrum Sharing
Tomoki Murakami, Shinya Otsuki, Tomoaki Ogawa, Yasushi Takatori · 2020
Diversifying devices and use scenarios have been focused on spectrum sharing according to communication environments in a target area. This paper proposes an environment recognition scheme for dynamic spectrum sharing systems. Our scheme dynamically uses CSI to allocate spectrum resources by recognizing the user location and the congestion rate in a target area. Furthermore, low-cost recognition can be expected with the IEEE 802.11ac WLAN CSI. To realize our scheme in realistic environments with actual devices, we developed a CSI monitoring system that uses the commodity WLAN devices, and we evaluated the environment recognition performance in our experimental measurements. We also prove the effectiveness of our scheme in experimental results of user locations and congestion rates.