Patent ID: 9451636
Filing Date: 2016-09-20
CPC Classification: H04W,Y02D

Claim Text:
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 (RAW) parameter set element; determining a RAW based on the RAW parameter set (RPS) element; receiving, from the AP, a broadcast frame containing information about assignment of one or more RAW slots; and transmitting a second frame to the AP within the determined RAW allowing channel access of the STA based on an interframe space (IFS) and a backoff slot for enhanced distributed channel access (EDCA), wherein the RAW is divided into the one or more RAW slots, wherein the RPS element comprises at least one RAW assignment field, wherein each of the at least one RAW assignment fields contains information on a RAW group which is a group of STAs, information on a cross slot boundary indicating whether a transmission across a RAW slot boundary is allowed to the STA, and information related to transmission of the broadcast frame, wherein the broadcast frame is received at the beginning of the determined RAW according to the information related to transmission of the broadcast frame.