Prioritizing carriers in low-cost Internet-base-station (LCIB) frequency-hopping pilot beacons

• US 7,848,302 B1
• Filed: 10/18/2007
• Issued: 12/07/2010
• Est. Priority Date: 10/18/2007
• Status: Active Grant

• Current Assignee: Sprint Spectrum LLC (Deutsche Telekom AG)
• Original Assignee: Sprint Spectrum LP (Deutsche Telekom AG)
• Inventors: Barbee, Bryan T., Sill, Timothy W., Talley, Ryan S.
• Primary Examiner(s): Qureshi; Afsar M.
• Application Number:
  US11/874,811
• Time in Patent Office: 1,146 Days
• Field of Search: 3702381-322, 370341-344, 370/395.21, 370/395.41, 370436-477, 375/E1.036, 379219-234, 455419-561, 455/562.1
• US Class Current: 370/342
• CPC Class Codes: H04B 1/7156 Arrangements for sequence synchronisation
• CPC Class Codes: H04W 48/08 Access restriction or access information delivery, e.g. discovery data delivery signalling during connection H04W76/00
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

Methods and systems are provided for prioritizing carriers in low-cost Internet-base-station-(LCIB) frequency-hopping pilot beacons. In one embodiment, an LCIB provides a frequency-hopping pilot beacon that repeatedly cycles through transmitting pilot-beacon information on each of multiple carriers. The LCIB identifies a first list of mobile stations, as well as a first list of carriers. The LCIB uses the first list of mobile stations to identify a second list of carriers from among the first list of carriers, thereby identifying a third list of carriers consisting of any carriers that are in the first list of carriers but not in the second list of carriers. The LCIB then prioritizes the second list of carriers over the third list of carriers for inclusion in the frequency-hopping pilot beacon.

Claims

1. A method for a low-cost Internet base station (LCIB) to prioritize carriers on a frequency-hopping pilot beacon, the method comprising:

providing a frequency-hopping pilot beacon that repeatedly cycles through transmitting pilot-beacon information on each of multiple carriers;

identifying a first list of mobile stations;

identifying a first list of carriers;

using the first list of mobile stations to identify a second list of carriers from among the first list of carriers, thereby identifying a third list of carriers consisting of any carriers that are in the first list of carriers but not in the second list of carriers; and

prioritizing the second list of carriers over the third list of carriers for inclusion in the frequency-hopping pilot beacon.

2. The method of claim 1, wherein the frequency-hopping pilot beacon comprises a pilot channel, a paging channel, and a sync channel.

3. The method of claim 1, wherein the LCIB is associated with a list of home mobile stations, and wherein the first list of mobile stations comprises the list of home mobile stations.

4. The method of claim 3, wherein the first list of mobile stations consists of the list of home mobile stations.

5. The method of claim 3, wherein the first list of mobile stations comprises any mobile stations that are currently registered with the LCIB.

6. The method of claim 5, wherein prioritizing the second list of carriers over the third list of carriers comprises prioritizing (i) any carriers that mobile stations in the list of home mobile stations will select over (ii) any carriers that mobile stations currently registered with the LCIB but not in the list of home mobile stations will select.

7. The method of claim 5, wherein prioritizing the second list of carriers over the third list of carriers comprises prioritizing (i) any carriers that mobile stations currently registered with the LCIB will select over (ii) any carriers that mobile stations in the list of home mobile stations but not currently registered with the LCIB will select.

8. The method of claim 1, wherein the first list of mobile stations comprises any mobile stations that are currently registered with the LCIB.

9. The method of claim 8, wherein the first list of mobile stations consists of any mobile stations that are currently registered with the LCIB.

10. The method of claim 1, wherein identifying the first list of carriers comprises identifying a list of carriers on which service is provided in a nearest macro-network coverage area.

11. The method of claim 10, wherein the nearest macro-network coverage area is at least one of a cell, a sector, a code division multiple access (CDMA) coverage area, an Evolution Data Optimized (EV-DO) coverage area, and a WiMax coverage area.

12. The method of claim 10, wherein identifying the list of carriers on which service is provided in the nearest macro-network coverage area comprises wirelessly receiving the list of carriers on which service is provided in the nearest macro-network coverage area.

13. The method of claim 12, wherein the list of carriers on which service is provided in the nearest macro-network coverage area comprises a code division multiple access (CDMA) channel-list message (CLM).

14. The method of claim 10, wherein identifying the list of carriers on which service is provided in the nearest macro-network coverage area comprises querying a database using at least one of a location of the LCIB, an identifier of the LCIB, and an identifier of the nearest macro-network coverage area.

15. The method of claim 1, wherein each mobile station in the first list of mobile stations is arranged to select a carrier from the first list of carriers, and wherein using the first list of mobile stations to identify the second list of carriers comprises selecting those carriers in the first list of carriers that the mobile stations in the first list of mobile stations will select.

16. The method of claim 15, wherein each mobile station in the first list of mobile stations is arranged to select a carrier from the first list of carriers using a first hash function, and wherein selecting those carriers in the first list of carriers that the mobile stations in the first list of mobile stations will select comprises using the first hash function.

17. The method of claim 16, wherein using the first hash function comprises using a mobile identification number (MIN) as an input into the first hash function.

18. The method of claim 1, wherein prioritizing the second list of carriers over the third list of carriers comprises at least one of (a) including in the pilot beacon only the carriers in the second list, (b) including in the pilot beacon the carriers in the second list more often than the carriers in the third list, and (c) prioritizing in the pilot beacon the carriers in the second list based on how many mobile stations in the first list of mobile stations will select those carriers.

19. A low-cost Internet base station (LCIB) comprising:

a communication interface;

a processor; and

data storage comprising instructions executable by the processor to;

provide a frequency-hopping pilot beacon that repeatedly cycles through transmitting pilot-beacon information on each of multiple carriers;

identify a first list of mobile stations;

identify a first list of carriers;

use the first list of mobile stations to identify a second list of carriers from among the first list of carriers, thereby identifying a third list of carriers consisting of any carriers that are in the first list of carriers but not in the second list of carriers; and

prioritize the second list of carriers over the third list of carriers for inclusion in the frequency-hopping pilot beacon.