ABSTRACT
As well as receiving radio programs, the communication between the mobile users and the access point is becoming more and more difficult with their moving away from the access point, and
1 INTRODUCTION
Wireless LAN, also known as WLAN (Wireless LAN), is generally used for the broadband home, inside of the building and the park, the typical distance covers from tens of meters to several hundred meters, the current technology uses 802.11a/b/g series. As an alternative or extension of the traditional network cabling, WLAN uses wireless technology to transport data, voice and video signals in the air. The problems encountered in the original wired network are solved immediately with the invention of Wireless LAN, it can make any user expand and extend wired network. As long as wireless communications are achieved on the basis of the wired network through a wireless access point, wireless bridge, wireless card and other wireless devices, it can provide all the features of the wired LAN and achieve Mobile applications with changing and extending the network as the needs of users at random. Wireless LAN liberates individuals from the desk edge, so that they can anytime, anywhere access information, which improves the efficiency of the staff office.
