| 摘要 |
According to one embodiment of the present invention, an uplink (UL) multi-user (MU) transmission method of a station (STA) device in a wireless LAN (WLAN) system comprises the steps of: receiving a downlink (DL) MU frame; generating an UL MU acknowledge (ACK) frame; and UL MU-transmitting the UL MU ACK frame, wherein the UL MU ACK frame can be UL MU-transmitted by having a null data packet (NDP) frame format including a legacy preamble, a high efficiency (HE) preamble, and an acknowledge (ACK) field and not including a data field. |
