ADAPTIVE THRESHOLDING IN A WAKE-ON-RADIO SYSTEM

• US 20110312285A1
• Filed: 06/16/2011
• Published: 12/22/2011
• Est. Priority Date: 06/16/2010
• Status: Active Grant

• Current Assignee: Essence Security International (E.S.I.) Ltd. (Essence USA Inc.)
• Original Assignee: Essence Security International (E.S.I.) Ltd. (Essence USA Inc.)
• Inventors: Amir, Haim, Zertser, Igal, Terem, Guy
• Granted Patent: US 9,078,214 B2
• Time in Patent Office: Days
• US Class Current: 455/69
• CPC Class Codes: H04W 52/0225 using monitoring of external events, e.g. the presence of a signal
• CPC Class Codes: H04W 52/0245 according to signal strength
• CPC Class Codes: H04W 52/228 using past power values or information
• CPC Class Codes: H04W 52/287 when the channel is in stand-by
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

A method for modifying a wake threshold for a wake-on-radio (WOR) receiver including: setting the wake threshold at a first level, counting false crossings of the wake threshold, and optionally modifying the wake threshold level based, at least in part, on a result of the counting. A receiver in a wake-on-radio (WOR) system including a wake-on-radio unit configured to implement the method for modifying a wake threshold. A method for setting a transmit power level of a transmitter for a wake-on-radio (WOR) system transmitter including: setting the level at a low level, receiving reports of false crossings of a wake threshold from a WOR receiver, and counting false crossings reported by the WOR receiver, and optionally modifying the transmit power level based, at least in part, on a result of the counting. A transmitter in a wake-on-radio (WOR) system including a transmit power adapter configured to implement the above method. Related apparatus and methods are also described.

Claims

1. A method for modifying a wake threshold for a wake-on-radio (WOR) receiver comprising:

setting the wake threshold at a first level;

counting false crossings of the wake threshold; and

optionally modifying the wake threshold level based, at least in part, on a result of the counting.

2. The method of claim 1 and further comprising optionally modifying the wake threshold as follows:

if a count of the false crossings exceeds a first trigger within a first time period, then increasing the level of the wake threshold;

else if a count of the false crossings falls below a second trigger within a second time period, then decreasing the level of the wake threshold.

3. The method of claim 1 and further comprising counting true crossings of the wake threshold, computing a ratio of false crossing to true crossings during a time period, and optionally modifying the wake threshold as follows:

if the ratio exceeds a first ratio-level, then increasing the level of the wake threshold;

else if the ratio falls below a second ratio-level, then decreasing the level of the wake threshold.

4. The method of claim 3 and further including producing a log of at least some wake-ups.

5. The method of claim 4 in which the log comprises a plurality of values from a group which includes:

a wake threshold value;

a count of false crossings;

a count of true crossings; and

a timestamp.

6. The method of claim 1 and further including producing a notification if the level of the wake threshold rises above a specified high level.

7. The method of claim 6 and further including transmitting the notification.

8. A receiver in a wake-on-radio (WOR) system comprising a wake-on-radio unit configured to implement the method for modifying a wake threshold of claim 1.

15. A wake-on-radio (WOR) unit comprising a wake threshold adapter configured to implement the method of claim 1.

9. A method for setting a transmit power level of a transmitter for a wake-on-radio (WOR) system transmitter comprising:

setting the level at a low level;

receiving reports of false crossings of a wake threshold from a WOR receiver; and

counting false crossings reported by the WOR receiver; and

optionally modifying the transmit power level based, at least in part, on a result of the counting.

10. The method of claim 9 and further comprising optionally modifying the transmit power level as follows:

if the count of the false crossings exceeds a first trigger within a first time period, then increasing the level of the transmit power level;

else if a count of the false crossings falls below a second trigger within a second time period, then decreasing the level of the transmit power level.

11. The method of claim 9 and further comprising:

receiving reports of true crossings of a wake threshold from the WOR receiver;

computing a ratio of false crossing to true crossings during a time period; and

optionally modifying the transmit power level as follows;

if the ratio exceeds a first ratio-level, then increasing the level of the transmit power level;

else if the ratio falls below a second ratio-level, then decreasing the level of the transmit power level.

12. The method of claim 9 and further comprising:

counting of wake-up messages sent by the transmitter;

computing a ratio of false crossing to wake-up messages sent during a time period; and

optionally modifying the transmit power level as follows;

if the ratio exceeds a first ratio-level, then increasing the level of the transmit power level;

else if the ratio falls below a second ratio-level, then decreasing the level of the transmit power level.

13. The method of claim 9 in which:

the receiving reports comprises receiving reports from two or more WOR receivers; and

the counting the false crossings comprises counting the false crossings reported from all of the WOR receivers.

14. The method of claim 9 in which:

the receiving reports comprises receiving reports from two or more WOR receivers; and

the counting the false crossings comprises counting the false crossings reported from fewer than all of the WOR receivers.

16. A transmitter in a wake-on-radio (WOR) system comprising a transmit power adapter configured to implement the method of claim 9.

17. A wake-on-radio (WOR) system comprising:

a transmitter configured to optionally modify a transmit power level based, at least in part, on a result of receiving reports of false crossings of a wake threshold from a WOR receiver; and

a receiver configured to optionally send reports of false crossings of the wake threshold to the transmitter.

18. The system of claim 17 comprising a plurality of receivers configured to optionally send reports of false crossings of the wake threshold to the transmitter.

19. A wake-on-radio (WOR) system comprising:

a transmitter configured to optionally modify a transmit power level based, at least in part, on a result of receiving reports of false crossings of a wake threshold from a WOR receiver; and

a receiver configured to optionally modify the wake threshold level based, at least in part, on counting false crossings of a wake threshold, and to optionally send reports of false crossings of the wake threshold to the transmitter.

20. The system of claim 19 in which the transmitter and the receiver perform the optional modifications based upon counts of false crossings of a wake threshold made during mutually exclusive time periods.