Method and device for transmitting wake-up packet in wireless LAN system

A transmitting device transmitting a wake-up frame in a first wireless LAN system and a second wireless LAN system, the transmitting device comprising:

• a transceiver that transmits or receives a radio signal;
• and
• a processor configured to control the transceiver, wherein the processor is configured to:
• generate a physical layer protocol data unit (PPDU) to which the first wireless LAN system is applied;
• and
• transmit a wake-up frame to which the second wireless LAN system is applied through the PPDU,
• wherein the PPDU is transmitted through a first frequency band,
• the PPDU comprises a signal field and a data frame,
• the signal field includes information on that the data frame is transmitted in at least one radio unit (RU),
• the at least one radio unit is any radio unit except for three 26-RUs positioned at a center of the first frequency band, the 26-RUs representing the RU with 26 number of tones,
• the wake-up frame is transmitted through a 4 MHz band positioned at a center of the three 26-RUs,
• a coefficient is inserted into first subcarriers configuring the 4 MHz band, and
• an on-off keying (OOK) method is applied to the wake-up frame, and the wake-up frame is configured with an on signal and an off signal.