METHOD OF MODIFYING PILOT POWER FOR A HOME BASE STATION ROUTER BASED ON USER DEMAND

• US 20090111499A1
• Filed: 10/24/2007
• Published: 04/30/2009
• Est. Priority Date: 10/24/2007
• Status: Abandoned Application

• Current Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Original Assignee: Lucent Technologies, Inc. (Nokia Corporation)
• Inventors: SAMUEL, LOUIS G., BOSCH, PETER, HO, LESTER T.W., CLAUSSEN, HOLGER
• Application Number:
  US11/877,769
• Publication Number:
  US 20090111499A1
• Time in Patent Office: Days
• US Class Current: 455/522
• CPC Class Codes: H04W 36/16 Performing reselection for specific purposes
• CPC Class Codes: H04W 36/30 by measured or perceived connection quality data
• CPC Class Codes: H04W 52/242 taking into account path loss
• CPC Class Codes: H04W 52/287 when the channel is in stand-by
• CPC Class Codes: H04W 52/325 Power control of control or pilot channels
• CPC Class Codes: H04W 52/343 taking into account loading or congestion level
• CPC Class Codes: H04W 52/367 Power values between minimum and maximum limits, e.g. dynamic range
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B

Abstract

The present invention provides a method implemented in a base station router. One embodiment of the method includes determining a transmission power for a pilot signal transmitted by the base station router. The transmission power being determined based upon a number of mobile units that are camped on the base station router. Another embodiment of the method includes deploying the first base station router in a physical structure and estimating the dimensions of the physical structure based on a statistical representation of at least one handover attempt associated with the first base station router. Estimation of the dimensions of the physical structure occurs in response to deployment of the first base station router in the physical structure.

Claims

1. A method implemented in a first base station router, comprising:

determining a transmission power for a pilot signal transmitted by the first base station router, the transmission power being determined based upon a number of mobile units that are camped on the first base station router.

2. The method of claim 1, wherein determining the transmission power for the pilot signal comprises selecting a minimum value of the transmission power based upon dimensions of a physical structure that contains the first base station router.

3. The method of claim 2, wherein determining the transmission power for the pilot signal comprises setting the transmission power at the selected minimum value when no mobile units are camped on the first base station router.

4. The method of claim 3, wherein determining the transmission power for the pilot signal comprises selecting a radiation pattern for transmitting the pilot signal based upon the dimensions of the physical structure that contains the first base station router.

5. The method of claim 3, comprising estimating the dimensions of the physical structure based on a statistical representation of at least one handover attempt associated with the first base station router.

6. The method of claim 1, comprising transmitting the pilot signal at the determined transmission power during selected time intervals.

7. The method of claim 6, comprising selecting the time interval for transmitting the pilot signal at the determined transmission power.

8. The method of claim 2, wherein determining the transmission power for the pilot signal comprises setting the transmission power at a value that is higher than the selected minimum value when at least one mobile unit is camped on the first base station router.

9. The method of claim 8 wherein determining the transmission power for the pilot signal comprises selecting a value for the transmission power based upon at least one path-loss condition associated with at least one channel of at least one air interface between the first base station router and said at least one mobile unit.

10. The method of claim 8, wherein determining the transmission power for the pilot signal comprises determining the transmission power for the pilot signal based upon at least one activity mode of said at least one mobile unit.

11. The method of claim 10, wherein determining the transmission power for the pilot signal comprises decreasing the transmission power when said at least one mobile unit is in an idle mode and increasing the transmission power when said at least one mobile unit is in an active mode.

12. The method of claim 8, comprising modifying at least one handover threshold for said at least one mobile unit when said at least one mobile unit camps on the first base station router.

13. The method of claim 12, wherein modifying said at least one handover threshold comprises modifying said at least one cell re-selection threshold such that said at least one mobile unit remains camped on the first base station router when a pilot signal strength associated with at least one second base station router exceeds the pilot signal strength associated with the first base station router.

14. A method implemented in a first base station router, comprising:

deploying the first base station router in a physical structure; and

estimating, in response to deployment of the first base station router in the physical structure, the dimensions of the physical structure based on a statistical representation of at least one active or idle mode event associated with the first base station router.

15. The method of claim 14, comprising determining a transmission power for a pilot signal transmitted by the first base station router, the transmission power being determined based upon a number of mobile units that are camped on the first base station router and the estimated dimensions of the physical structure.

16. The method of claim 15, wherein determining the transmission power for the pilot signal comprises selecting a minimum value of the transmission power based upon the estimated dimensions of the physical structure and setting the transmission power at the selected minimum value when no mobile units are camped on the first base station router.

17. The method of claim 15, wherein determining the transmission power for the pilot signal comprises selecting a radiation pattern for transmitting the pilot signal based upon the estimated dimensions of the physical structure.

18. The method of claim 15, comprising selecting a time interval for transmitting the pilot signal when no mobile units are camped on the first base station router and transmitting the pilot signal at the selected transmission power during the selected time intervals.

19. The method of claim 16, wherein determining the transmission power for the pilot signal comprises setting the transmission power at a value that is higher than the selected minimum value when at least one mobile unit is camped on the first base station router, decreasing the transmission power when said at least one mobile unit is in an idle mode, and increasing the transmission power when said at least one mobile unit is in an active mode.

20. The method of claim 14, wherein estimating the dimensions of the physical structure comprises determining the statistical representation of at least one active or idle mode event based on handover attempts performed by at least one of mobile unit that is registered with the first base station router or an unregistered mobile unit.