Ofdma random access method for low latency

A station (STA) in a wireless local area network system, the STA comprises,

• a transceiver for transmitting and/or receiving a radio signal;
• and
• a processor being coupled to the transceiver, wherein the processor is configured to:
• receive, from an access point (AP), a trigger frame including first association identifier (AID) information for orthogonal frequency division multiple access (OFDMA)-based random access and resource allocation information related to a first resource unit corresponding to the first AID information, wherein the first AID information is related to a first STA group, which has traffic requiring latency equal to or smaller than a first threshold value, among STAs associated with the AP;
• and
• perform OFDMA-based random access based on the first AID information.