Method and device for performing grouping for sensing in wireless LAN system

A sensing initiator in a wireless local area network (WLAN) system, comprising:

• a transceiver adapted to transmit and/or receive a wireless signal;
• and
• a processor adapted to control the transceiver,
• wherein the processor is further adapted to:
• obtain sensing capability information of a station (STA), wherein the capability information includes first information related to a bandwidth supported by the STA and second information related to whether the STA requires to be polled for measurement;
• based on the sensing capability information, transmit an initiation frame to request a sensing measurement session, wherein the initiation frame includes a session identifier (ID) for identifying the sensing measurement session, an Association ID (AID) of the STA, and a bandwidth field related to a bandwidth to be used between the sensing initiator and the STA;
• and
• determining whether the sensing measurement session is successful based on whether a response frame is received within a time threshold in response to the initiation frame.