Use of macro-network channel-list messages for selection of carriers for low-cost internet base-station frequency-hopping pilot beacons

• US 8,498,241 B1
• Filed: 03/10/2009
• Issued: 07/30/2013
• Est. Priority Date: 03/10/2009
• Status: Active Grant

• Current Assignee: Sprint Spectrum LP (Deutsche Telekom AG)
• Original Assignee: Sprint Spectrum LP (Deutsche Telekom AG)
• Inventors: Talley, Ryan S., Yenney, Christopher M., Srinivas, Shilpa Kowdley
• Primary Examiner(s): Masur, Paul H
• Application Number:
  US12/400,905
• Time in Patent Office: 1,603 Days
• Field of Search: 370/328, 370/335, 370/336, 370/338, 370/342, 370/345, 370/347, 370/441, 370/442, 455/432, 455/436, 455/443
• US Class Current: 370/328
• CPC Class Codes: H04B 7/2628 using code-division multiple access [CDMA] or spread spectrum multiple access [SSMA] H04B7/2618 takes precedence
• CPC Class Codes: H04W 36/16 Performing reselection for specific purposes
• CPC Class Codes: H04W 48/12 using downlink control channel
• CPC Class Codes: H04W 84/045 using private Base Stations, e.g. femto Base Stations, home Node B

Abstract

Methods and systems are provided for selecting carriers for low-cost Internet base station (LCIB) frequency-hopping pilot beacons. The LCIB receives channel-list message information associated with one or more macro-network coverage areas within a vicinity of the LCIB. The LCIB then uses the received channel-list message information to identify a set of macro-network carriers on which to transmit a frequency-hopping pilot beacon. The LCIB can then transmit its frequency-hopping pilot beacon on each of the carriers in the identified set.

Claims

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

an LCIB receiving channel-list message information associated with one or more macro-network coverage areas within a vicinity of the LCIB;

the LCIB using the received channel-list message information to identify a set of macro-network carriers on which to transmit a frequency-hopping pilot beacon; and

the LCIB transmitting the frequency-hopping pilot beacon, wherein transmitting the frequency-hopping pilot beacon comprises repeatedly cycling through transmitting pilot-beacon information on each of the carriers in the identified set and, for each carrier in the identified set, prioritizing how often the pilot beacon information is transmitted on the carrier based on how many of the one or more macro-network coverage areas each includes the carrier in a channel-list message of the macro-network coverage area.

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, further comprising:

sorting the carriers indicated in the received channel-list message information in order according to, for each carrier, how many of the one or more macro-network coverage areas each includes the carrier in a channel-list message of the macro-network coverage area.

4. The method of claim 3, wherein prioritizing how often the pilot beacon information is transmitted on each carrier based on how many of the one or more macro-network coverage areas each includes the carrier in a channel-list message of the macro-network coverage area comprises transmitting the pilot beacon information more often on a carrier that is included in a greater number of macro-network coverage area channel-list messages.

5. The method of claim 3, further comprising:

determining an LCIB limit, wherein the LCIB limit corresponds to a maximum number of carriers on which the LCIB is capable of transmitting its pilot beacon; and

wherein the LCIB using the received channel-list message information to identify a set of macro-network carriers on which to transmit a frequency-hopping pilot beacon comprises identifying from the sorted carriers an LCIB limit number of carriers that are included in a greatest number of macro-network coverage area channel-list messages.

6. The method of claim 5, wherein the LCIB limit is less than or equal to 5.

7. The method of claim 1, wherein at least one of the one or more macro-network coverage areas is selected from the group consisting of a code division multiple access (CDMA) coverage area, an Evolution Data Optimized (EV-DO) coverage area, and a WiMax coverage area.

8. The method of claim 1, wherein receiving the channel-list message information comprises requesting the channel-list message information from a cell-site database maintained by a wireless service provider.

9. The method of claim 8, wherein the LCIB receives the channel-list message information via a network connection that connects the LCIB to the wireless service provider via the Internet.

10. The method of claim 8, wherein receiving the channel-list message information comprises providing a location of the LCIB or a unique identifier of the LCIB to the cell-site database.

11. The method of claim 1, wherein the LCIB provides data and/or voice traffic to a mobile station over a carrier that is different from macro-network carriers.

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

a communication interface;

a processor; and

data storage comprising instructions executable by the processor to;

receive channel-list message information associated with one or more macro-network coverage areas within a vicinity of the LCIB;

use the received channel-list message information to identify a set of macro-network carriers on which to transmit a frequency-hopping pilot beacon; and

transmit the frequency-hopping pilot beacon, wherein transmitting the frequency-hopping pilot beacon comprises repeatedly cycling through transmitting pilot-beacon information on each of the carriers in the identified set and, for each carrier in the identified set, prioritizing how often the pilot beacon information is transmitted on the carrier based on how many of the one or more macro-network coverage areas each includes the carrier in a channel-list message of the macro-network coverage area.

13. The LCIB of claim 12, wherein the frequency-hopping pilot beacon comprises a pilot channel, a paging channel, and a sync channel.

14. The LCIB of claim 12, wherein the data storage further comprises instructions executable by the processor to:

sort the carriers indicated in the received channel-list message information in order according to, for each carrier, how many of the one or more macro-network coverage areas each includes the carrier in a channel-list message of the macro-network coverage area.

15. The LCIB of claim 14, wherein prioritizing how often the pilot beacon information is transmitted on each carrier based on how many of the one or more macro-network coverage areas each includes the carrier in a channel-list message of the macro-network coverage area comprises transmitting the pilot beacon information more often on a carrier that is included in a greater number of macro-network coverage area channel-list messages.

16. The LCIB of claim 14, wherein the data storage further comprises instructions executable by the processor to:

determine an LCIB limit, wherein the LCIB limit corresponds to a maximum number of carriers on which the LCIB is capable of transmitting its pilot beacon; and

wherein the LCIB using the received channel-list message information to identify a set of macro-network carriers on which to transmit a frequency-hopping pilot beacon comprises identifying from the sorted carriers an LCIB limit number of carriers that are included in a greatest number of macro-network coverage area channel-list messages.

17. The LCIB of claim 16, further comprising a GPS receiver, wherein the data storage further comprises instructions executable by the processor to provide a location of the LCIB determined by the GPS receiver to a cell-site database via the network connection.

18. The LCIB of claim 12, further comprising an Ethernet-based network connection, and wherein the LCIB receives the channel-list message information via the network connection.

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

an LCIB sending a request for channel-list message information;

an LCIB receiving channel-list message information associated with macro-network coverage areas within a vicinity of the LCIB;

the LCIB using the received channel-list message information to identify a set of macro-network carriers on which to transmit a frequency-hopping pilot beacon;

the LCIB determining that the number of carriers set forth in the received channel-list message information is above an LCIB limit, wherein the LCIB limit corresponds to a maximum number of carriers on which the LCIB is capable of transmitting its pilot beacon; and

the LCIB transmitting a frequency-hopping pilot beacon on an LCIB limit number of carriers selected from the carriers set forth in the received channel-list message information, wherein the selected carriers are those appearing on a highest number of channel-list messages of the macro-network coverage areas within the vicinity of the LCIB.

20. The method of claim 19, wherein, prior to transmitting the frequency-hopping pilot beacon, the LCIB sorts the carriers set forth in the channel-list message information according to a number of macro-network coverage areas within the predetermined vicinity of the LCIB that include each such carrier in the coverage area'"'"'s respective channel-list message.