A wireless hotspot, that is, a hotspot, refers to a place that provides wireless local area network (WLAN) access to the Internet in public places. Most of these places are cafes, airports, railway stations, business hotels, universities, large exhibition halls and so on. No matter in large, medium and small cities, all kinds of broadband access methods are ubiquitous, and the price of broadband access is not expensive, generally between 30- 150 yuan per month, and its speed is mostly around 5 12Kbps-8Mbps, and its performance can fully meet the demand of broadband internet access for multiple computers at the same time. For service halls, libraries, airports, hotels, shopping malls/supermarkets, even cafes, restaurants and families where broadband and wireless routers have been installed, the wireless hotspot function can be conveniently realized by using the existing broadband access or wireless routers/wireless AP.