Method and apparatus for accessing channel in wireless LAN

摘要

Disclosed are a method and an apparatus for accessing a channel in a wireless LAN. A method for a station (STA) initially accessing the channel in the wireless LAN comprises the steps of: the STA receiving from an access point (AP) a frame including channel state information and a set of an N (a natural number wherein N>1) number of access parameter sets; the STA selecting a random variable when the channel state information indicates that a wireless link is busy; the STA selecting one access parameter set from the N number of access parameter sets on the basis of the one access parameter and transmitting an association request frame to the AP.

主权项

1. A method for an initial channel access performed by a station (STA) in a wireless LAN, comprising:
receiving, by the STA, a frame including information on a channel state and N (N>1) access parameter sets from an access point (AP); selecting, by the STA, a random variable when the information on the channel state indicates that a wireless link is congested; selecting, by the STA, one access parameter set among the N access parameter sets based on the random variable; and transmitting an association request frame to the AP by performing the initial channel access based on the one access parameter set, wherein each of the N access parameter sets includes information on a contention window minimum (CWmin), a contention window maximum (CWmax) and an arbitration inter-frame space (AIFS) to perform the initial channel access by the STA.