System, apparatus, and method for communicating wake-up signal, and wireless terminal

• US 8,682,242 B2
• Filed: 12/08/2011
• Issued: 03/25/2014
• Est. Priority Date: 12/23/2010
• Status: Active Grant

• Current Assignee: Electronics and Telecommunications Research Institute
• Original Assignee: Electronics and Telecommunications Research Institute
• Inventors: Lee, Seung Sik, Oh, Mi Kyung
• Primary Examiner(s): Jackson, Blane J
• Application Number:
  US13/314,453
• Publication Number:
  US 20120163422A1
• Time in Patent Office: 838 Days
• Field of Search: 455/7, 455/13.4, 455/91, 455/334, 455/343.1, 455/343.2, 455/343.3
• US Class Current: 455/7
• CPC Class Codes: H04W 52/0229 where the received signal is a wanted signal
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

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.

Claims

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.