Method for granting a transmission opportunity in a wireless lan system that uses a combined channel constituted by a plurality of subchannels, and station supporting the method

Abstract

According to one embodiment, a method for granting a transmission opportunity in a wireless local area network includes: transmitting a transmission opportunity (TXOP) granting frame to grant a TXOP to a plurality of target stations; and receiving a frame from each of the plurality of target stations that has acquired the TXOP upon receiving the TXOP granting frame.

What is claimed is: 
     
         1 . A method for transmitting data in a wireless local area network, the method comprising:
 receiving, by a transmitting station from an access point (AP), an uplink granting frame for granting uplink transmissions to a plurality of target stations,   wherein the uplink granting frame includes identification information, duration information and subchannel information, the identification information indicating the plurality of target stations, the duration information indicating a duration of a transmission opportunity (TXOP) that has an estimated time required for the plurality of target stations to transmit data frames, the subchannel information indicating a plurality of subchannels assigned to the plurality of target stations; and   if the transmitting station belongs to one of the plurality of target stations, transmitting, by the transmitting station, a data frame to the AP during the duration of the TXOP via at least one subchannel of the plurality of subchannels.   
     
     
         2 . The method of  claim 1 , wherein the identification information includes a plurality of association identifiers (AIDs) identifying the plurality of target stations. 
     
     
         3 . The method of  claim 1 , wherein a bandwidth for the plurality of target stations is one of 20 MHz, 40 MHz, 80 MHz and 160 MHz. 
     
     
         4 . The method of  claim 1 , wherein the uplink granting frame is received as an aggregate Medium Access Control (MAC) protocol data unit (A-MPDU). 
     
     
         5 . A device for a wireless local area network, the device comprising:
 a transceiver configured to receive and transmit radio signals; and   a processor operatively coupled with the transceiver and configured to:   control the transceiver to receive, from an access point (AP), an uplink granting frame for granting uplink transmissions to a plurality of target stations,   wherein the uplink granting frame includes identification information, duration information and subchannel information, the identification information indicating the plurality of target stations, the duration information indicating a duration of a transmission opportunity (TXOP) that has an estimated time required for the plurality of target stations to transmit data frames, the subchannel information indicating a plurality of subchannels assigned to the plurality of target stations; and   control the transceiver to transmit a data frame to the AP during the duration of the TXOP via at least one subchannel of the plurality of subchannels if the device belongs to one of the plurality of target stations.   
     
     
         6 . The device of  claim 5 , wherein the identification information includes a plurality of association identifiers (AIDs) identifying the plurality of target stations. 
     
     
         7 . The device of  claim 5 , wherein a bandwidth for the plurality of target stations is one of 20 MHz, 40 MHz, 80 MHz and 160 MHz. 
     
     
         8 . The device of  claim 5 , wherein the uplink granting frame is received as an aggregate Medium Access Control (MAC) protocol data unit (A-MPDU).