WIRELESS COMMUNICATIONS TERMINAL HAVING RF DIRECT WAKEUP FUNCTION AND WAKEUP METHOD THEREOF

• US 20130107775A1
• Filed: 01/03/2012
• Published: 05/02/2013
• Est. Priority Date: 10/28/2011
• Status: Active Grant

• Current Assignee: Solum Co., Ltd.
• Original Assignee: Samsung Electro-Mechanics Co., Ltd. (Samsung Group)
• Inventors: CHO, Han Jin, Lee, Jae Hyung, Kim, Myeung Su, Lim, Joon Hyung, Park, Tah Joon
• Granted Patent: US 8,630,217 B2
• Time in Patent Office: Days
• US Class Current: 370/311
• CPC Class Codes: H04W 52/0235 where the received signal is a power saving command
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A wireless communications terminal includes: an RF wake-up detection unit detecting a first RF signal including an RF ID for waking up; and a wireless communications unit waking up when the RF ID included in the first RF signal detected by the RF wake-up detection unit matches a pre-set reference ID in a sleep mode.

Claims

1. A wireless communications terminal comprising:

an RF wake-up detection unit detecting a first RF signal including an RF ID for waking up; and

a wireless communications unit waking up when the RF ID included in the first RF signal detected by the RF wake-up detection unit matches a pre-set reference ID in a sleep mode.

2. The wireless communications terminal of claim 1, wherein the RF wake-up detection unit comprises:

an RF rectifying unit rectifying the first RF signal; and

a level conversion unit converting a signal level from the rectifying unit into a signal level that can be recognized by the wireless communications unit.

3. The wireless communications terminal of claim 1, wherein the wireless communications unit comprises:

a communication unit performing wireless communications with a pre-set second RF signal; and

a controller controlling wireless communications through the communication unit,

wherein the controller comprises;

a sleep logic unit generating a wake-up signal when the RF ID included in the first RF signal detected by the RF wake-up detection unit matches the pre-set reference ID; and

a microprocessor waking up by the wake-up signal from the sleep logic unit and controlling wireless communications through the communication unit.

4. The wireless communications terminal of claim 3, wherein when the level of the first RF signal is a pre-set reference level or higher during a predetermined interrupt recognition time interval, the sleep logic unit recognizes the level of the first RF signal as a wake-up interrupt signal and, thereafter, the sleep logic unit recognizes the level of the first RF signal as one of level 1 and level 0 at every unit time interval included in a predetermined ID recognition time duration.

5. The wireless communications terminal of claim 4, wherein the sleep logic unit determines the level of the first RF signal as one of a high level and a low level at a pre-set clock period with respect to each of the plurality of unit time intervals, and when the high levels within the respective unit time intervals are a pre-set number or greater, the sleep logic unit recognizes them as level 1, or otherwise, as level 0.

6. The wireless communications terminal of claim 4, wherein the sleep logic unit determines the level of the first RF signal as one of a high level and a low level at a pre-set clock period with respect to each of the plurality of unit time intervals, and when the levels of the first RF signal within the respective unit time intervals are all high levels, the sleep logic unit recognizes them as level 1, or otherwise, as level 0.

7. A wake-up method of a wireless communications terminal, the method comprising:

an interrupt recognizing operation of recognizing a wake-up interrupt signal included in a first RF signal in a sleep mode;

an ID recognizing operation of recognizing an RF ID included in the first RF signal followed by the wake-up interrupt signal, when the wake-up interrupt signal is recognized;

an ID determining operation of determining whether the RF ID matches a pre-set reference ID;

a signal generation operation of generating a wake-up signal when the RF ID matches the pre-set reference ID; and

a wake-up operation of waking the wireless communications terminal up by the wake-up signal.

8. The method of claim 7, further comprising:

an RF detection operation of detecting a first RF signal including an RF ID for waking up, before the interrupt recognizing operation.

9. The method of claim 8, wherein, in the interrupt signal recognizing operation, when the level of the first RF signal is a pre-set reference level or higher during a predetermined interrupt recognition time interval, the first RF signal is recognized as a wake-up interrupt signal.

10. The method of claim 9, wherein, in the ID recognizing operation, the level of the first RF signal is recognized as one of level 1 and level 0 at every unit time interval included in a predetermined ID recognition time duration.

11. The method of claim 10, wherein, in the ID recognizing operation, the level of the first RF signal is determined as one of high level and low level at a pre-set clock period with respect to each of the plurality of unit time intervals, and when the high levels within the respective unit time intervals are a pre-set number or greater, the high levels is recognized as level 1, or otherwise, as level 0.

12. The method of claim 10, wherein, in the ID recognizing operation, the level of the first RF signal is determined as one of high level and low level at a pre-set clock period with respect to each of the plurality of unit time intervals, and when the levels of the first RF signal within the respective unit time intervals are all high levels, the high levels are recognized as level 1, or otherwise, as level 0.