Method for transmitting and receiving a frame in a wireless lan system, and apparatus for supporting the method

Abstract

Provided is a method for receiving a frame, which is to be performed by a station (STA) in a wireless LAN system. The method includes receiving a multicast frame from an access point (AP). The multicast frame includes a medium access control (MAC) header. The MAC header includes a transmitter address (TA) field and a receiver address (RA) field. The RA field includes a multicast association identifier for identifying an STA group including said STA.

1 - 12 . (canceled) 
     
     
         13 . A method for receiving a frame by a station (STA) in a wireless local area network system, the method comprising:
 transmitting, to an access point (AP), an Association Identifier (AID) request frame to request a group AID;   receiving, from the AP, an AID response frame as a response to the AID request frame; and   receiving, from the AP, a Physical layer convergence procedure Protocol Data Unit (PPDU) including a signal field and a Medium Access Control (MAC) frame,   wherein the MAC frame includes an indication field, a first address field, and a second address field,   wherein the AID request frame includes group address information associated with a STA group that includes the STA,   wherein the AID response frame includes the group AID corresponding to the group address information, and   wherein the indication field indicates a downlink transmission of the MAC frame, the first address field includes the group AID and the second address field includes a MAC address of the AP.   
     
     
         14 . The method of  claim 13 , wherein a length of the first address field is 2 octets, and a length of the second address field is 6 octets. 
     
     
         15 . The method of  claim 13 ,
 wherein the signal field includes a UL/DL indication bit, and   wherein the UL/DL indication bit indicates the PPDU is transmitted by a downlink transmission.   
     
     
         16 . The method of  claim 13 , wherein the AP and the STA are operating on a sub 1 GHz frequency band. 
     
     
         17 . A station (STA) for receiving frames in a wireless local area network system, the STA comprising:
 a transceiver that transmits and receives a radio signal; and   a processor, operatively coupled to the transceiver, that:   controls the RF unit to transmit, to an access point (AP), an Association Identifier (AID) request frame to request a group AID,   controls the RF unit to receive, from the AP, an AID response frame as a response to the AID request frame, and   controls the RF unit to receive, from the AP, a Physical layer convergence procedure Protocol Data Unit (PPDU) including a signal field and a Medium Access Control (MAC) frame,   wherein the MAC frame includes an indication field, a first address field, and a second address field,   wherein the AID request frame includes group address information associated with a STA group that includes the STA,   wherein the AID response frame includes the group AID corresponding to the group address information, and   wherein the indication field indicates a downlink transmission of the MAC frame, the first address field includes the group AID and the second address field includes a MAC address of the AP.   
     
     
         18 . The STA of  claim 17 , wherein a length of the first address field is 2 octets, and a length of the second address field is 6 octets. 
     
     
         19 . The STA of  claim 17 ,
 wherein the signal field includes a UL/DL indication bit, and   wherein the UL/DL indication bit indicates the PPDU is transmitted by a downlink transmission.   
     
     
         20 . The STA of  claim 17 , wherein the AP and the STA are operating on a sub 1 GHz frequency band.