METHOD FOR TRANSMITTING AND RECEIVING CONFIRMATION RESPONSE SIGNAL FOR UPLINK MULTI-USER DATA IN WIRELESS LAN SYSTEM, AND APPARATUS THEREFOR

摘要

A method by which a station (STA) receives a Multi-STA BlockAck (M-BA) frame in a wireless LAN system supporting an OFDMA, according to one embodiment of the present invention, comprises the steps of: transmitting an uplink multi-user (ULMU) frame on the basis of a trigger frame; receiving an M-BA frame based on an OFDMA physical layer protocol data unit (PPDU) including an SIG B field; and acquiring a data stream including an ACK/NACK for the STA from the OFDMA PPDU-based M-BA frame, wherein the STA acquires the data stream according to an indication of a user field identified by a predetermined ID among a plurality of user fields included in the SIG B field, and the data stream indicated by the user field identified by the predetermined ID can be equally allocated to other STAs performing the UL MU transmission on the basis of the trigger frame.