Method for uplink transmission in wireless communication system and apparatus therefor

A method for a uplink (UL) multi-user (MU) transmission by a station (STA) in a wireless communication system, the method comprising:

• receiving a trigger frame including resource allocation information for allocating a resource unit for UL MU transmission from an access point (AP);
• and
• transmitting a UL PPDU based on the resource allocation information,
• wherein the UL PPDU includes a legacy preamble, a high-efficiency-SIGNAL-A (HE-SIG-A) field, a high efficiency-short training field (HE-STF), a high-efficiency-long training field (HE-LTF), and a data field without a high-efficiency-SIGNAL-B (HE-SIG-B) field, and
• the HE-STF, the HE-LTF, and the data field are transmitted in the resource unit indicated by the resource allocation information.

A station (STA) device performing uplink (UL) multi-user (MU) transmission in a wireless communication system, the station device comprising:

• a radio frequency (RF) unit transmitting and receiving a wireless signal;
• and
• a processor,
• wherein the processor is configured to receive a trigger frame including resource allocation information for allocating a resource unit for UL MU transmission from an access point (AP) and to transmit a UL PPDU based on the resource allocation information,
• wherein the UL PPDU includes a legacy preamble, a high-efficiency-SIGNAL-A (HE-SIG-A) field, a high efficiency-short training field (HE-STF), a high-efficiency-long training field (HE-LTF), and a data field without a high-efficiency-SIGNAL-B (HE-SIG-B) field, and
• the HE-STF, the HE-LTF, and the data field are transmitted in the resource unit indicated by the resource allocation information.