A method by which an access point (AP) transmits a frame in a wireless LAN, according to one embodiment of the present disclosure, comprises: determining a wake-up radio (WUR) identifier (WID) for identifying a station (STA) and a group identifier (GID) for identifying an STA group to which the STA belongs, in a WUR mode; transmitting the WID and the GID through a primary connectivity radio (PCR) so as to allocate, to the STA, the determined WID and GID; and transmitting, based on the GID or the WID, a WUR frame for waking up a plurality of STAs including the STA operating in the WUR mode, wherein the AP can determine the GID by using a part of an ID space which can be used in the WUR, and determine the WID by using the remaining space excluding the partial ID space used for the GID.