System, apparatus, and method for communicating wake-up signal, and wireless terminal
View Patent ↗A wake-up signal communication system including a wake-up center, a wake-up signal repeating apparatus, and a wireless terminal is provided. The wake-up center transmits the first wake-up signal. The wake-up signal repeating apparatus generates the second wake-up signal with the first wake-up signal and the code of the wireless terminal, and transmits the second wake-up signal. The wireless terminal determines a wake-up based on the second wake-up signal.
1. An apparatus for communicating a wake-up signal, comprising:
a detector for rectifying a first wake-up signal and generating a rectified signal;
a code generator for outputting a code signal that corresponds to a code of a wireless terminal; and
a comparator for generating a second wake-up signal to be transmitted to the wireless terminal that is to be woken up by using the rectified signal and the code signal.
2. The apparatus of claim 1 , wherein the rectified signal is input to a non-inverting terminal of the comparator and the code signal is input to an inverting terminal of the comparator.
3. The apparatus of claim 2 , wherein the code signal has a low level of a bit “1” and has a high level of a bit “0”.
4. The apparatus of claim 3 , wherein a value of the high level is higher than a maximum value of the rectified signal.
5. The apparatus of claim 4 , further comprising:
a first antenna for receiving the first wake-up signal from a wake-up center; and
a band pass filter for filtering the first wake-up signal and generating a filtered signal,
wherein the detector rectifies the filtered signal.
6. The apparatus of claim 5 , further comprising
a first variable amplifier for performing variable amplification on the filtered signal and generating an amplified signal,
wherein the detector rectifies the amplified signal.
7. The apparatus of claim 6 , further comprising
a second variable amplifier for performing variable amplification on the second wake-up signal and transmitting the amplified second wake-up signal through a second antenna.
8. A method for communicating a wake-up signal, comprising:
rectifying a first wake-up signal and generating a rectified signal;
generating a code signal that corresponds to a code of a terminal to be woken up; and
generating a second wake-up signal to be transmitted to the terminal by using the rectified signal and the code signal.
9. The method of claim 8 , wherein the rectifying of the first wake-up signal includes
receiving the first wake-up signal from a wake-up center.
10. The method of claim 9 , wherein the rectifying of the first wake-up signal further includes:
performing band pass filtering on the first wake-up signal and generating a filtered signal;
performing variable amplification on the filtered signal and generating an amplified signal; and
rectifying the amplified signal and generating the rectified signal.
11. The method of claim 10 , wherein the generating of a second wake-up signal includes
performing variable amplification on the second wake-up signal.
12. The method of claim 8 , wherein the generating of a second wake-up signal includes
comparing the rectified signal and the code signal to generate the second wake-up signal.
13. The method of claim 12 , wherein the code signal has a low level of a bit “1” and has a high level of a bit “0”,
wherein a value of the high level is higher than a maximum value of the rectified signal.