Lg Electronics Inc.

Suh Wook Kim

Yong Ho Seok

Bong Hoe Kim

Dae Won Lee

Eun Sun Kim

Jong Hyun Park

Ill Soo Sohn

A layered channel access method of a Group Representative-station (GR-STA) in a Wireless Local Area Network (WLAN) system is provided. The method includes receiving a management, including setting information indicative of a first phase and a second phase frame, from an Access Point (AP), receiving a first radio frame from the AP or accessing a channel and sending a second radio frame to the AP during the first phase indicated by the setting information, and receiving a third radio frame from an affiliated STA of a group to which the GR-STA belongs or accessing a channel and sending a fourth radio frame to at least one STA of the group to which the GR-STA belongs during the second phase indicated by the setting information.

Layered channel access method and apparatus in wireless local area network system

Provided is a communication method by a management station in a wireless communication system. The method includes: receiving, from one or more stations (STAs), at least one advertising message including information on each STA; transmitting an invitation message to a specific STA among one or more STAs; establishing a link with the specific STA; and exchanging a frame with the specific STA. The link establishment includes performing association with the specific STA in order to exchange the frame with the specific STA.

Communication method in wireless LAN system

A method for a power save mode operation in a wireless local area network (WLAN) system is provided. The method comprising determining a type of a receiving station (STA) indicator on the basis of the number of STAs which are associated with the AP and which intend to transmit buffered traffic; generating a traffic indicator map (TIM) element including information which indicates the receiving STA indicator and the type of the receiving STA indicator, transmitting the TIM element, receiving a poll frame for requesting data frame transmission from one STA among the STAs and transmitting the data frame to the STA.

Method for power save mode operation in wireless local area network and apparatus for the same

A method for a power save mode operation in a wireless local area network (WLAN) system is provided. The method includes transmitting, by an access point (AP), a traffic indication map (TIM) element that announces existence of buffered traffic, wherein the TIM element includes an association ID (AID) assigned to a buffered STA having the buffered traffic when the buffered station (STA) is associated with the AP; receiving, by the AP, a poll frame for requesting data frame transmission from a candidate STA, wherein the poll frame contains an AID of the candidate STA and a medium access control (MAC) address which is a unique identifying information of the candidate STA; and determining, by the AP, whether the candidate STA is the buffered STA on the basis of the AID and the MAC address of the candidate STA.

Provided is a method for operating a power save mode performed by an access point in a WLAN system. The method includes: transmitting, by an access point (AP), a first traffic indication map (TIM) broadcast indication frame to a first station (STA); transmitting, by the AP, a second TIM broadcast indication frame to a second STA; transmitting, by the AP, a first TIM frame indicating that buffered traffic to the first STA is present; and transmitting, by the AP, a second TIM frame indicating that buffered traffic to the second STA is present. The first TIM broadcast indication frame includes a first TIM offset field indicating a transmission time of the first TIM frame, and the second TIM broadcast indication frame includes a second TIM offset field indicating a transmission time of the second TIM frame.

Method for managing power save mode in wireless LAN system, and device for supporting same

A method of apparatus for channel access in a wireless local area network is provided. A station receives a channel access control message including group indication information indicating a group of stations allowed to access a channel from an access point. The station attempts contention for accessing the channel if the station belongs to the group indicated by the group indication information.

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Anyang-si, South Korea

Suh Wook Kim