Method and device for performing relay transmission in wireless lan system

A first station (STA) comprising:

• at least one transceiver;
• and
• at least one processor connected to the at least one transceiver,
• wherein the at least one processor is configured to:
• receive a relay transmission request frame from an access point (AP) through the at least one transceiver;
• receive at least one physical layer protocol data unit (PPDU) based on a first trigger frame for uplink (UL) relay transmission from each of at least one non-AP STA through the at least one transceiver;
• and
• transmit data of the at least one non-AP STA to the AP based on the at least one PPDU through the at least one transceiver,
• wherein the relay transmission request frame includes information related to the at least one non-AP STA to participate in the UL relay transmission.

An access point (AP) comprising:

• at least one transceiver;
• and
• at least one processor connected to the at least one transceiver,
• wherein the at least one processor is configured to:
• transmit a relay transmission request frame to a first STA through the at least one transceiver;
• and
• receive data of at least one non-AP STA transmitted by each of the at least one non-AP STA from the first STA through the at least one transceiver,
• wherein a first physical layer protocol data unit (PPDU) including data of a first non-AP STA among the at least one non-AP STA is transmitted from the first non-AP STA to the first STA based on a first trigger frame for uplink (UL) relay transmission, and
• wherein the relay transmission request frame includes information related to the at least one non-AP STA to participate in the UL relay transmission.