Method, terminal and computer program product for adjusting power consumption of a RFID reader associated with a mobile terminal

• US 7,145,437 B2
• Filed: 10/16/2003
• Issued: 12/05/2006
• Est. Priority Date: 10/16/2003
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Nokia Corporation
• Inventors: Jalkanen, Janne, Vesikivi, Petri, Huomo, Heikki, Kühl, Carmen
• Primary Examiner(s): YANG, CLARA I
• Application Number:
  US10/687,146
• Publication Number:
  US 20050083181A1
• Time in Patent Office: 1,146 Days
• Field of Search: 340/10.34, 340/10.2, 340/10.3, 455/343.2
• US Class Current: 340/10.3
• CPC Class Codes: G06K 7/0008 General problems related to the reading of electronic memory record carriers, independent of its reading method, e.g. power transfer
• CPC Class Codes: G06K 7/10207 parameter settings related to power consumption of the interrogator
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

The method, terminal and computer program product determine the context of the mobile terminal associated with the RFID reader and adjusts the power consumption of the RFID reader based upon the determined context relative to at least one previous context determination. To adjust the power consumption, the frequency at which the RFID reader is actuated may be altered. Thus, the power consumption of the RFID reader may be reduced when no change in the context of the mobile terminal is determined and/or may be increased when a change in the context of the mobile terminal is determined. Due to the adjustment of power consumption by RFID readers, power is conserved in the mobile terminals associated with RFID readers, which permits the mobile terminals and RFID readers to operate longer without requiring charging or replacement of the power supply.

Claims

1. A method for adjusting power consumption of a radio frequency identification (RFID) reader associated with a mobile terminal, comprising:

determining a context of the mobile terminal, wherein determining a context of the mobile terminal comprises detecting any RFID tags in an area proximate the mobile terminal in response to interrogation by the RFID reader;

determining whether a context of the mobile terminal has changed, wherein determining a change in context comprises monitoring changes in the detection of RFID tags in the area proximate the mobile terminal relative to a prior interrogation to indicate a change in context of the mobile terminal; and

adjusting the power consumption of the RFID reader based upon the context of the mobile terminal relative to at least one previous context determination of the mobile terminal, wherein adjusting the power consumption of the RFID reader comprises altering the frequency at which the RFID reader is actuated, and

wherein adjusting the power consumption includes reducing the power consumption of the RFID reader when no change in the context of the mobile terminal is determined.

2. The method for adjusting power consumption according to claim 1, wherein adjusting the power consumption further includes increasing the power consumption of the RFID reader when a change in the context of the mobile terminal is determined.

3. The method for adjusting power consumption according to claim 2, wherein increasing the power consumption of the RFID reader comprises increasing the frequency at which the area proximate the mobile terminal is interrogated by the RFID reader when a change in the context of the mobile terminal is determined.

4. The method for adjusting power consumption according to claim 1, wherein reducing the power consumption of the RFID reader comprises reducing the frequency at which the area proximate the mobile terminal is interrogated by the RFID reader when no change in the context of the mobile terminal is determined.

5. The method for adjusting power consumption according to claim 1, wherein reducing the power consumption of the RFID reader comprises ceasing interrogation of the area proximate the mobile terminal by the RFID reader until a change in context of the mobile terminal is detected.

6. The method for adjusting power consumption according to claim 1, wherein adjusting the power consumption of the RFID reader comprises changing an operational mode of the RFID reader.

7. A method for adjusting power consumption of a radio frequency identification (RFID) reader associated with a mobile terminal, comprising:

detecting any RFID tags in an area proximate the mobile terminal in response to interrogation by the RFID reader;

determining whether a context of the mobile terminal has changed, wherein determining a change in context comprises monitoring changes in the detection of RFID tags in the area proximate the mobile terminal relative to a prior interrogation to indicate a change in context of the mobile terminal; and

adjusting the power consumption of the RFID reader based upon the determination of whether the context of the mobile terminal has changed, wherein adjusting the power consumption includes reducing the power consumption of the RFID reader when no change in the context of the mobile terminal is determined.

8. The method for adjusting power consumption according to claim 7, wherein adjusting the power consumption further includes increasing the power consumption of the RFID reader when a change in the context of the mobile terminal is determined.

9. The method for adjusting power consumption according to claim 8, wherein increasing the power consumption of the RFID reader comprises increasing the frequency at which the area proximate the mobile terminal is interrogated by the RFID reader when a change in the context of the mobile terminal is determined.

10. The method for adjusting power consumption according to claim 7, wherein reducing the power consumption of the RFID reader comprises reducing the frequency at which the area proximate the mobile terminal is interrogated by the RFID reader when no change in the context of the mobile terminal is determined.

11. The method for adjusting power consumption according to claim 7, wherein reducing the power consumption of the RFID reader comprises ceasing interrogation of the area proximate the mobile terminal by the RFID reader until a change in context of the mobile terminal is determined.

12. The method for adjusting power consumption according to claim 7, wherein adjusting the power consumption of the RFID reader comprises changing an operational mode of the RFID reader.

13. A mobile terminal comprising:

a radio frequency identification (RFID) reader, wherein said RFID reader detects any RFID tags in an area proximate the mobile terminal in response to interrogations by said RFID reader;

at least one processor to determine a context of the mobile terminal based upon information received regarding an environment of the mobile terminal, wherein said at least one processor monitors any changes in the detection of RFID tags in the area proximate the mobile terminal relative to a prior interrogation to determine whether the context of the mobile terminal has changed; and

at least one controller in communication with said at least one processor that adjusts the power consumption of said RFID reader based upon the context of the mobile terminal by altering the frequency at which said RFID reader is actuated, wherein said at least one controller adjusts the power consumption of said RFID reader based upon the determination of whether the context of the mobile terminal has changed,

wherein adjusting the power consumption includes reducing the power consumption of said RFID reader when no change in the context of the mobile terminal is determined.

14. The mobile terminal according to claim 13, wherein said at least one processor comprises said at least one controller.

15. The mobile terminal according to claim 13, further comprising at least one sensor to provide at least a portion of the information received regarding the environment of the mobile terminal.

16. The mobile terminal according to claim 15, wherein said at least one sensor comprises at least one of a proximity detector, a movement detector, and a temperature detector.

17. The mobile terminal according to claim 13, further comprising a timer for tracking time between determinations of a change in context.

18. The mobile terminal according to claim 13, further comprising a switch in communication with said at least one controller to adjust the power consumption of said RFID reader by changing an operational made of said RFID reader.

19. The mobile terminal according to claim 13, wherein:

said RFID reader comprises at least one of said at least one processor and said at least one controller.

20. A computer program product for adjusting power consumption of a radio frequency identification (RFID) reader associated with a mobile terminal, the computer program product comprising a computer-readable storage medium having computer-readable program code portions stored therein, the computer-readable program code portions comprising:

a first executable portion capable of determining a context of the mobile terminal, wherein said first executable portion is capable of determining the context of the mobile terminal by detecting any RFID tags in an area proximate the mobile terminal in response to interrogation by the RFID reader,

wherein said first executable portion is also capable of determining whether a context of the mobile terminal has changed, wherein determining a change in context comprises monitoring changes in the detection of RFID tags in the area proximate the mobile terminal relative to a prior interrogation to indicate a change in context of the mobile terminal; and

a second executable portion capable of adjusting the power consumption of the RFID reader based upon the context of the mobile terminal relative to at least one previous context determination of the mobile terminal, wherein adjusting the power consumption of the RFID reader comprises altering the frequency at which the RFID reader is actuated, and

wherein said second executable portion is capable of reducing the power consumption of the RFID reader when no change in the context of the mobile terminal is determined by said first executable portion.

21. The computer program product for adjusting power consumption according to claim 20, wherein said second executable portion is also capable of increasing the power consumption of the RFID reader when a change in the context of the mobile terminal is determined by said first executable portion.

22. The computer program product for adjusting power consumption according to claim 21, wherein said second executable portion is capable of increasing the power consumption of the RFID reader by increasing the frequency at which the area proximate the mobile terminal is interrogated by the RFID reader when a change in the context of the mobile terminal is determined by said first executable portion.

23. The computer program product for adjusting power consumption according to claim 20, wherein said second executable portion is capable of reducing the power consumption of the RFID reader by reducing the frequency at which the area proximate the mobile terminal is interrogated by the RFID reader when no change in the context of the mobile terminal is determined by said first executable portion.

24. The computer program product for adjusting power consumption according to claim 20, wherein said second executable portion is capable of reducing the power consumption of the RFID reader by ceasing interrogation of the area proximate the mobile terminal by the RFID reader until a change in context of the mobile terminal is detected by said first executable portion.

25. The computer program product for adjusting power consumption according to claim 20, wherein said second executable portion is also capable of adjusting the power consumption of the RFID reader by changing an operational mode of the RFID reader.

26. A radio frequency identification (RFID) device, comprising:

a RFID reader for detecting any RFID tags in response to interrogations by said RFID reader;

at least one processor to determine a context of the device based upon information received regarding an environment of the device, wherein said at least one processor monitors any changes in the detection of RFID tags relative to a prior interrogation to determine whether the context of the device has changed; and

at least one controller in communication with said at least one processor for adjusting the power consumption of said RFID reader based upon the context of the device by altering the frequency at which said RFID reader is actuated, wherein said at least one controller adjusts the power consumption of said RFID reader based upon the determination of whether the context of the device has changed,

wherein adjusting the power consumption includes reducing the power consumption of said RFID reader when no change in the context of the device is determined.

27. The RFID device according to claim 26, wherein said at least one processor comprises said at least one controller.

28. The RFID device according to claim 26, further comprising at least one sensor to provide at least a portion of the information received regarding the environment of the device.

29. The RFID device according to claim 28, wherein said at least one sensor comprises at least one of a proximity detector, a movement detector, and a temperature detector.

30. The RFID device according to claim 26, further comprising a timer for tracking time between determinations of a change in context.

31. The RFID device according to claim 26, further comprising a switch in communication with said at least one controller to adjust the power consumption of said RFID reader by changing an operational mode of said RFID reader.

32. The RFID device according to claim 26, wherein:

said RFID reader comprises at least one of said at least one processor and said at least one controller.