Wake-up radio systems and methods based on backscatter wake-up radio

A wake-up radio terminal based on a backscatter wake-up radio, comprising:

• a communication module that includes
• a wake-up radio transmitter performing backscatter communication in a sleep mode and
• a main radio transmitter performing data transmission in a wake-up mode;
• one or more processors configured to executed instructions;
• and a memory storing instructions, which when executed by the one or more processors configure the one or more processors to:
• receive a beacon signal from a data collection apparatus, wherein the data collection apparatus includes a signal transmitter,
• set an arbitrary receiving window period in a window setting period based on the received beacon signal,
• transmit, in the window setting period, a backscatter response message to the data collection apparatus based on a reception time of a contention signal received from the data collection apparatus in the set receiving window period and
• receive, from the data collection apparatus, a wake-up signal in a data transmission period, and
• in response to receiving the wake-up signal:
• set a wake-up period within the data transmission period,
• switch to a wake-up mode and,
• transmit data to the data collection apparatus based on a scheduling time according to the backscatter response message.