Method and device for transmitting wakeup packet in wireless lan system

A transmitting device for transmitting a wake-up packet in a wireless LAN system, comprising:

• a radio frequency (RF) unit transmitting or receiving radio signals;
• and
• a processor controlling the RF unit,
• wherein the processor is configured to:
• generate a wake-up packet, and
• transmit the wake-up packet to a receiving device,
• wherein the wake-up packet includes a sequence being configured of first information and second information by applying an On-Off Keying (OOK) scheme,
• wherein the first information and the second information are configured of an ON-signal and an OFF-signal,
• wherein the ON-signal is transmitted via a first symbol, the first symbol being generated by applying a first sequence on K consecutive subcarriers of a 20 MHz band and by performing 64-point Inverse Fast Fourier Transform (IFFT),
• wherein the OFF-signal is transmitted via a second symbol, the second symbol being generated by applying a second sequence on K consecutive subcarriers of a 20 MHz band and by performing 64-point IFFT,
• wherein, in K subcarriers to which the first sequence is applied, coefficients of the subcarriers are set to 1 or −1 in m subcarrier units, and coefficients of the remaining subcarriers are set to 0,
• wherein each of the first information and the second information is transmitted via a third symbol, the third symbol being configured of the first symbol and the second symbol, and
• wherein K and m are integers.