Patent ID: 9510367
Filing Date: 2016-11-29
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 an RAW based on the RAW parameter set (RPS) element; 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 one or more RAW slots other than the backoff slot, wherein the RPS element comprises at least one RAW assignment field, and wherein each of the at least one RAW assignment field comprises information on a RAW group which is a group of STAs, information on a RAW start time, information on a RAW duration corresponding to a product of a RAW slot duration and a number of the one or more RAW slots included in the RAW duration, and information on a cross slot boundary indicating whether a transmission across a RAW slot boundary is allowed to the STA.