(With the rapid development of mobile terminal devices, more and more people carry mobile terminals such as mobile phones, tablets, and notebooks with them. In business, customers' demand for wireless Internet access is becoming more and more intense. In addition to shopping, dining, and leisure, the Internet has become an indispensable part of business. Guests with ipads, smartphones and laptops can sit in the rest area or dining area during shopping and leisure, and request to read online anytime, anywhere. Wireless coverage and WIFI Internet access in the business have become the most basic services in large commercial places. Therefore, it has become urgent to deploy a set of operational, manageable, reliable and efficient WLAN.)