SYSTEM AND METHOD FOR INTERFERENCE BEACON TRANSMISSION

• US 20100203892A1
• Filed: 02/09/2010
• Published: 08/12/2010
• Est. Priority Date: 02/10/2009
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: Chevallier, Christophe, Yavuz, Mehmet, Nagaraja, Sumeeth, Meshkati, Farhad
• Granted Patent: US 8,682,331 B2
• Time in Patent Office: Days
• US Class Current: 455/437
• CPC Class Codes: H04W 36/30 by measured or perceived connection quality data
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B

Abstract

Various systems and methods for interference beacon transmission are disclosed. In one embodiment, an apparatus for initiating cell reselection in a wireless communication device, such as a HNB, comprises a processor configured to determine a first frequency at which one or more wireless communication devices communicate with a first cell and a transceiver configured to transmit an interference beacon at the first frequency configured to at least partially interfere with communications at the first frequency and initiate a cell reselection process by at least one of the wireless communication devices.

Claims

1. A method of initiating cell reselection in a wireless communication device, the method comprising:

determining a first frequency at which one or more wireless communication devices communicate with a first cell; and

transmitting an interference beacon at the first frequency configured to at least partially interfere with communications at the first frequency and initiate a cell reselection process by at least one of the wireless communication devices.

2. The method of claim 1, further comprising communicating with the at least one of the wireless communication devices at a second frequency different from the first frequency.

3. The method of claim 1, wherein the beacon comprises one or more overhead channels.

4. The method of claim 3, wherein the beacon comprises one or more of a P-SCH (Primary Synchronization Channel), S-SCH (Secondary Synchronization Channel), PCCPCH (Primary Common Control Physical Channel), BCCH (Broadcast Control Channel), PICH (Paging Indicator Channel), PCH (Paging Control Channel), and PC-PICH (Primary Common Pilot Channel).

5. The method of claim 1, wherein the beacon comprises cell data regarding a second cell different from the first cell.

6. The method of claim 5, wherein the cell data indicates a cell access restriction status is set to one of cell barred, reserved, or reserved for future-user status.

7. The method of claim 5, wherein the cell data indicates a cell reserved for CSG (Closed Subscriber Group) is set to true.

8. The method of claim 7, wherein the cell data indicates an LAI (Location Area Identifier) of the beacon which is the LAI of the first cell.

9. The method of claim 8, wherein the LAI of the first cell is different from an LAI of the second cell.

10. The method of claim 1, further comprising determining a first wake-up time of the at least one of the wireless communication devices, wherein the beacon is transmitted during the determined first wake-up time.

11. The method of claim 10, further comprising determining a second wake-up time of the at least one of the wireless communication devices and transmitting another interference beacon at the first frequency during the determined second wake-up time.

12. The method of claim 10, wherein the first wake-up time is determined based at least in part on a SFN (System Frame Number) of the first cell and an IMSI (International Mobile Subscriber Identity) of the at least one of the wireless communication devices.

13. The method of claim 1, further comprising:

determining a plurality of potential wake-up times of the at least one of the wireless communication devices, wherein the beacon is transmitted during one of the plurality of potential wake-up times; and

transmitting a plurality of additional interference beacons at the first frequency during the other determined potential wake-up times.

14. The method of claim 13, wherein the potential wake-up times are determined based at least in part on a SFN (System Frame Number) of the first cell.

15. The method of claim 1, further comprising transmitting a plurality of interference beacons at the first frequency.

16. The method of claim 1, further comprising periodically transmitting interference beacons at the first frequency.

17. An apparatus for initiating cell reselection in a wireless communication device, the apparatus comprising:

a processor configured to determine a first frequency at which one or more wireless communication devices communicate with a first cell; and

a transceiver configured to transmit an interference beacon at the first frequency configured to at least partially interfere with communications at the first frequency and initiate a cell reselection process by at least one of the wireless communication devices.

18. The apparatus of claim 17, wherein the transceiver is further configured to communicate with the at least one of the wireless communication devices at a second frequency different from the first frequency.

19. The apparatus of claim 17, wherein the beacon comprises one or more of a P-SCH (Primary Synchronization Channel), S-SCH (Secondary Synchronization Channel), PCCPCH (Primary Common Control Physical Channel), BCCH (Broadcast Control Channel), PICH (Paging Indicator Channel), PCH (Paging Control Channel), and PC-PICH (Primary Common Pilot Channel).

20. The apparatus of claim 17, wherein the processor is further configured to determine a first wake-up time of the at least one of the wireless communication devices and the transceiver is configured to transmit the beacon during the determined first wake-up time.

21. The apparatus of claim 20, wherein the first wake-up time is determined based at least in part on a SFN (System Frame Number) of the first cell and an IMSI (International Mobile Subscriber Identity) of the at least one of the plurality of wireless communication devices.

22. The apparatus of claim 17, wherein the processor is configured to determine a plurality of potential wake-up times of the at least one of the wireless communication devices and wherein the transceiver is configured to transmit the beacon during one of the plurality of potential wake-up times and is further configured to transmit a plurality of additional interference beacons at the first frequency during the other determined potential wake-up times.

23. The apparatus of claim 22, wherein the potential wake-up times are determined based at least in part on a SFN (System Frame Number) of the first cell.

24. A computer program product comprising:

a computer readable medium further comprising;

code for causing a computer to determine a first frequency at which one or more wireless communication devices communicate with a first cell; and

code for causing a computer to transmit an interference beacon at the first frequency configured to at least partially interfere with communications at the first frequency and initiate a cell reselection process by at least one of the wireless communication devices.

25. The computer program product of claim 24, further comprising code for causing a computer to communicate with the at least one of the wireless communication devices at a second frequency different from the first frequency.

26. The computer program product of claim 24, further comprising code for causing a computer to determine a first wake-up time of the at least one of the wireless communication devices and transmitting the beacon during the determined first wake-up time.

27. The computer program product of claim 26, wherein the first wake-up time is determined based at least in part on a SFN (System Frame Number) of the first cell and an IMSI (International Mobile Subscriber Identity) of the at least one of the plurality of wireless communication devices.

28. The computer program product of claim 24, further comprising:

code for causing a computer to determine a plurality of potential wake-up times of the at least one of the wireless communication devices and transmitting the beacon during one of the plurality of potential wake-up times; and

code for causing a computer to transmit a plurality of additional interference beacons at the first frequency during the other determined potential wake-up times.

29. The computer program product of claim 28, wherein the potential wake-up times are determined based at least in part on a SFN (System Frame Number) of the first cell.

30. An apparatus for initiating cell reselection in a wireless communication device, the apparatus comprising:

means for determining a first frequency at which one or more wireless communication devices communicate with a first cell; and

means for transmitting an interference beacon at the first frequency configured to at least partially interfere with communications at the first frequency and initiate a cell reselection process by at least one of the wireless communication devices.

31. The apparatus of claim 30, further comprising means for communicating with the at least one of the wireless communication devices at a second frequency different from the first frequency.

32. The apparatus of claim 30, further comprising means for determining a first wake-up time of the at least one of the wireless communication devices, wherein the beacon is transmitted during the determined first wake-up time.

33. The apparatus of claim 30, further comprising means for determining a plurality of potential wake-up times of the at least one of the wireless communication devices, wherein the beacon is transmitted during one of the plurality of potential wake-up times and wherein a plurality of additional interference beacons are transmitted at the first frequency during the other determined potential wake-up times.