| CPC H04W 74/0808 (2013.01) [H04W 74/0866 (2013.01); H04W 84/12 (2013.01)] | 14 Claims |

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1. A method in a wireless local area network (WLAN) system, the method comprising:
broadcasting, by a first station (STA), a sensing request frame; and
receiving, by the first STA, a first sensing response frame from a second STA and receiving a second sensing response frame from a third STA,
wherein the sensing request frame includes parameter information,
wherein the parameter information includes role information of a STA, timeout information for a sensing measurement session and information on a frequency band to which the sensing signal is allocated,
wherein the timeout information includes a value which is a time after which the sensing measurement session is terminated if there are no frame exchange sequences, and
wherein the sensing measurement session is terminated after an expiration of the timeout information.
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