WLAN Channel Allocation Method
Jie Hu · Computer Knowledge and Technology · 2012
With the time fly,LAN has been unable to serve the communications.So Wireless LAN is borned to fill in blanks and has been used in application.The world's first WLAN standard is the IEEE802.11 standard,which is formulated by the IEEE in 1997 June.It works in 2.4GHz ISM band and the number of channel is limited.According to the characteristics of wireless communication radio,high density of APs will cause interference and competition.This means the reducement of the network quality.With the high speed growth of WLAN,the prob lem will become more and more serious.Proceeding from a 802.11 protocol,start with a theoretical point of view the reason for a channel allocation problem,channel alloca tion algorithm to be addressed through the interference between the access point,and finally the improved algorithm,The features are: 1,distributed,adaptive;improved protocol scan function using sniffing technology to expand the scope of the detect ed interference,so that the scanning efficiency is improved;3,using the backoff mechanism to reduce the channel allocation conflict con sumption,to improve the algorithm convergencespeed.NS-2 is a free software as a simulation platform used for network technology development.The paper also uses it for basic experi ments and the effect of channel allocation algorithm has been proved.