METHOD FOR IMPROVING THE QUALITY OF A SERVICE IN WIRELESS LAN SYSTEM, PARTICULARLY RELATED TO REALIZING A DIFFERENTIATED SERVICE BY SETTING UP A CONTENTION WINDOW VALUE FOR A SPECIFIC CLIENT DEVICE DIFFERENTLY FROM ANOTHER CLIENT DEVICE

摘要

PURPOSE: A method for improving quality of service in a wireless LAN system is provided to realize a differentiated service by reducing a backoff time for clients requiring high service quality in comparison with general client. CONSTITUTION: The minimum values and the maximum values of different contention windows are preliminarily set up with respect to a plurality of wireless LAN clients(11). The clients(11) who want to occupy a channel confirm the occupied state of the channel. If the channel is in an idle state, each of the clients(11) reduce back-off time as much as the minimum values of the contention windows set for each client(11). If the back-off time terminates, the clients(11) try to occupy the channel.