Patent ID: 9578655
Date: 2017-02-21
CPC Classifications: H04W,Y02D

Claim:
1. A method for performing channel access in at least one station (STA) of a wireless communication system, comprising: receiving, from an access point (AP), a first frame containing a traffic indication map (TIM) element and a restricted access window parameter set (RPS) element; determining a restricted access window (RAW) allowing channel access of the STA based on the RPS element; and transmitting a second frame to the AP within the determined RAW, wherein: the RAW comprises at least one slot; and the RPS element comprises at least one RAW assignment field, each of the at least one RAW assignment field comprising a first field indicating a slot duration and a second field indicating whether or not the channel is only accessed by paged STAs, and wherein an index of a slot in which the STA is allowed to start accessing the channel is determined based on an association identifier (AID) of the STA and the number of slots in the RAW, wherein the index of the slot is determined based on a position index of an AID bit in the TIM element when the second field indicates that the channel is only accessed by the paged STAs.