Wireless communication method and wireless communication terminal using wake-up radio

A wireless communication terminal communicating wirelessly with a base wireless communication terminal, the wireless communication terminal comprising:

• a processor,
• wherein the processor is configured to:
• receive, from the base wireless communication terminal, a trigger frame for switching an operation mode from a first operation mode to a second operation mode, wherein the wireless communication terminal receives only a PPDU which has a predetermined format and is transmitted by a predetermined modulation method in the first operation mode, and receives a PPDU other than the PPDU which has the predetermined format and is transmitted by the predetermined modulation method in the second operation mode,
• switch, based on the trigger frame, the first operation mode to the second operation mode,
• transmit, in the second operation mode, an initial frame in response to the trigger frame, and
• switch back to the first operation mode when the wireless communication terminal does not receive a subsequent frame after the initial frame within a timeout interval,
• wherein the timeout interval is a time interval starting from when the initial frame is transmitted and ending when a predetermined time has elapsed, and
• wherein a time point when the wireless communication terminal switches back to the first operation mode is determined based on a transition delay which represents a delay required for switching the operation mode from the second operation mode to the first operation mode.

A method of operating a wireless communication terminal communicating wirelessly with a base wireless communication terminal, the method comprising:

• receiving, from the base wireless communication terminal, a trigger frame for switching an operation mode from a first operation mode to a second operation mode, wherein the wireless communication terminal receives only a PPDU which has a predetermined format and is transmitted by a predetermined modulation method in the first operation mode, and receives a PPDU other than the PPDU which has the predetermined format and is transmitted by the predetermined modulation method in the second operation mode,
• switching, based on the trigger frame, the first operation mode to the second operation mode,
• transmitting, in the second operation mode, an initial frame in response to the trigger frame, and
• switching back to the first operation mode when the wireless communication terminal does not receive a subsequent frame after the initial frame within a timeout interval,
• wherein the timeout interval is a time interval starting from when the initial frame is transmitted and ending when a predetermined time has elapsed, and
• wherein a time point when the wireless communication terminal switches back to the first operation mode is determined based on a transition delay which represents a delay required for switching the operation mode from the second operation mode to the first operation mode.