Patent ID: 9615286
Date: 2017-04-04
CPC Classifications: H04W,Y02D

Claim:
1. A method for performing channel access in a station (STA) in a wireless communication system, comprising: transmitting listening interval information to an access point (AP) wherein the listening interval is a period that a power save STA wakes up and listens to a beacon frame from an access point (AP), performing the channel access based on a mode of the STA, wherein the beacon frame including a traffic indication map (TIM) element is received during the listening interval when the STA is in a TIM mode, wherein a power save (PS)-Poll for channel access is received by the AP during the listening interval when the STA is in a non-TIM mode, wherein the STA in the non-TIM mode transmits the PS-Poll without receiving the beacon frame including the TIM element from the AP during every listening interval.