Method for categorization of multiple providers in a wireless communications service environment

• US 7,409,213 B2
• Filed: 09/27/2004
• Issued: 08/05/2008
• Est. Priority Date: 06/28/1996
• Status: Expired due to Fees

• Current Assignee: AT&T Mobility II LLC (AT&T, Inc.)
• Original Assignee: AT&T Mobility II LLC (AT&T, Inc.)
• Inventors: Raffel, Michael Allen, Lawrence, Christopher Gregory, Daly, John J., Bamburak, Michael D., Prise, Michael Edward
• Primary Examiner(s): Nguyen; Duc
• Assistant Examiner(s): ELCENKO, ERIC J
• Application Number:
  US10/949,313
• Publication Number:
  US 20050113089A1
• Time in Patent Office: 1,408 Days
• Field of Search: 455/435.2, 4551611-1613, 455/456.1, 455/432.1, 455/435.3, 455/179.1, 455/120, 455/168.1, 455/180.1, 455/62
• US Class Current: 455/435.2
• CPC Class Codes: H04W 48/16 Discovering, processing access restriction or access information
• CPC Class Codes: H04W 48/18 Selecting a network or a communication service
• CPC Class Codes: H04W 60/00 Affiliation to network, e.g. registration; Terminating affiliation with the network, e.g. de-registration
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

A communication device locates a preferable wireless service provider in a multi-service provider environment using a frequency band search schedule. Initially, the communications device registers with a less preferred service provider in a first frequency band. While remaining registered with the less preferred service provider, the device examines several frequency bands in the order specified by the frequency band search schedule. A frequency band is examined by dividing the frequency band into many sub-bands, and by locating the strongest signal above a threshold within the sub-band being examined. The examination continues until a second frequency band having a more preferred service provider is located. The communication device then registers with the more preferred service provider. The category of service provider may be identified and displayed on the communication device.

Claims

1. A method by which a communication device locates a wireless service provider in a multi-service provider environment, comprising:

storing a service provider table, the table including identities of a plurality of service providers and preference information associated with each identity;

locating and registering with a channel of a first service provider;

storing a frequency search schedule, the frequency search schedule having a list of a plurality of frequency bands in a predetermined order;

ordering at least some of the plurality of bands in the frequency search schedule based upon time-weighted counts of previous registrations in each band;

determining if the first service provider is acceptable, based on the service provider table preference information; and

if the first service is not acceptable, examining the plurality of bands in the order specified by the ordered frequency search schedule, until a channel having an acceptable service provider is located.

2. The method of claim 1, further comprising the step of storing a plurality of counters, each counter representing the time-weighted counts of the previous registrations with one or more channels in one of the bands of the frequency search schedule.

3. The method of claim 2, further comprising:

incrementing a counter corresponding to one of the bands of the frequency search schedule upon registration with a channel in the one band; and

adjusting the counter by a time-weighting factor to produce a time-weighted count corresponding to the one band.

4. The method of claim 1, further comprising modifying the frequency search schedule using information transmitted over a wireless interface.

5. The method of claim 1, wherein the examining the plurality of bands includes first examining one of the bands last used by the communication device.

16. The method of claim 1, further comprising:

entering an idle state for a duration of a timer;

examining the plurality of bands in the order specified by the frequency search schedule to determine if a channel with a second service provider with a higher priority in the service provider table is available at the expiry of the timer; and

registering with the channel of the second service provider if found.

17. The method of claim 1, wherein the channel of the first service provider is the channel last used by the communication device.

22. The method of claim 1, wherein determining if the first service provider is acceptable comprises determining the first service provider is acceptable if the service provider table preference information indicates the first service provider has a highest priority of the plurality of service providers in the service provider table.

6. A method by which a communication device locates a wireless service provider in a multi-service provider environment, comprising:

storing a service provider table, the table including identities of a plurality of service providers and preference information associated with each identity;

locating and registering with a channel of a first service provider;

storing a frequency search schedule, the frequency search schedule having a list of a plurality of frequency bands in a predetermined order;

determining if the channel of the first service provider is acceptable, based on the service provider table preference information; and

if the channel of the first service provider is not acceptable, examining the plurality of bands in the order specified by the frequency search schedule until a channel having an acceptable service provider is located, wherein the plurality of service providers are categorized into priority categories that determine whether a channel associated with a service provider is unacceptable, irrespective of signal quality.

7. The method of claim 6, further comprising the step of storing a plurality of counters representing the time-weighted counts of the previous registrations associated with each band of the frequency search schedule.

8. The method of claim 7, further comprising:

incrementing a counter corresponding to one of the bands of the frequency search schedule upon registration with a channel in the one band; and

adjusting the counter by a time-weighting factor to produce a time-weighted count corresponding to the one band.

9. The method of claim 6, further comprising modifying the frequency search schedule using information transmitted over a wireless interface.

10. The method of claim 6, wherein examining the plurality of bands includes first examining one of the bands with a channel last used by the communication device.

18. The method of claim 6, further comprising:

entering an idle state for a duration of a timer;

examining the plurality of bands in the order specified by the frequency search schedule to determine if a channel with a second service provider with a higher priority in the service provider table is available at the expiry of the timer; and

registering with the channel of the second service provider if found.

19. The method of claim 6, wherein the channel of the first service provider is the channel last used by the communication device.

23. The method of claim 6, wherein determining if the first service provider is acceptable comprises determining the first service provider is acceptable if the service provider table preference information indicates the first service provider has a highest priority of the plurality of service providers in the service provider table.

11. A method by which a communication device locates a wireless service provider in a multi-service provider environment, comprising:

storing a service provider table, the table including identities of a plurality of service providers and preference information associated with each identity;

locating and registering with a channel of a first service provider;

storing a frequency search schedule, the frequency search schedule having a list of a plurality of frequency bands in a predetermined order;

if the first service provider is not acceptable, continuing to examine the plurality of bands in the order specified by the frequency search schedule until a channel having an acceptable service provider is located, wherein the channel is determined to be one of an analog control channel, a digital traffic channel or a digital control channel.

12. The method of claim 11, further comprising the step of storing a plurality of counters each representing the time-weighted counts of previous registrations with channels in one of the bands of the frequency search schedule.

13. The method of claim 12, further comprising:

incrementing a counter corresponding to one of the bands of the frequency search schedule upon registration with a channel within the one band; and

adjusting the counter by a time-weighting factor to produce a time-weighted count corresponding to the one band.

14. The method of claim 11, further comprising modifying the frequency search schedule using information transmitted over a wireless interface.

15. The method of claim 11, wherein the examining the plurality of bands includes first examining one of the bands with a channel last used by the communication device.

20. The method of claim 11, further comprising:

entering an idle state for a duration of a timer;

examining the plurality of bands in the order specified by the frequency search schedule to determine if a channel with a second service provider with a higher priority in the service provider table is available at the expiry of the timer; and

registering with the channel of the second service provider if found.

21. The method of claim 11, wherein the channel of the first service provider is the channel last used by the communication device.

24. The method of claim 11, wherein determining if the first service provider is acceptable comprises determining the first service provider is acceptable if the service provider table preference information indicates the first service provider has a highest priority of the plurality of service providers in the service provider table.