Method for controlling channel re-selection

• US 8,559,901 B2
• Filed: 10/22/2009
• Issued: 10/15/2013
• Est. Priority Date: 12/24/1996
• 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: Moore, Michael P.
• Primary Examiner(s): Cumming, William D
• Application Number:
  US12/603,964
• Publication Number:
  US 20100041401A1
• Time in Patent Office: 1,454 Days
• Field of Search: 455/161.2, 455/165.1, 455/426.1, 455/429, 455/434, 455/455, 455/512
• US Class Current: 455/161.2
• CPC Class Codes: H03J 1/005 in a loop
• CPC Class Codes: H03J 1/0091 provided with means for scanning over a band of frequencies H03J1/0058 takes precedence
• CPC Class Codes: H04W 36/06 Reselecting a communication resource in the serving access point

Abstract

A mobile station including a processor and a memory storing program instructions. The instructions, when executed by the processor, cause the processor to determine if any candidate control channels of a list of candidate control channels are ineligible for selection by belonging to a private network to which the mobile station is not permitted access, analyze those candidate control channels not determined to be ineligible for selection to identify a primary candidate control channel, and attempt to select the primary candidate control channel.

Claims

1. A mobile station, comprising:

a processor; and

a memory having stored thereon program instructions which, when executed by the processor, cause the processor to perform operations comprising;

determining whether any candidate control channels, of a list of candidate control channels, are ineligible for selection by belonging to a private network to which the mobile station is not permitted access;

analyzing candidate control channels not determined to be ineligible for selection to identify a primary candidate control channel;

attempting to select the primary candidate control channel;

responsive to a failure in an attempt to select the primary candidate control channel, determining whether the failure to select is attributable to an incompatibility; and

responsive to determining that the failure to select is attributable to an incompatibility, marking the primary candidate control channel as ineligible.

2. The mobile station of claim 1, wherein the incompatibility comprises the mobile station being incompatible with a particular private network to which the primary candidate control channel corresponds.

3. The mobile station of claim 1, the memory further having stored thereon program instructions which, when executed by the processor, cause the processor to perform operations comprising:

after failing to select the primary candidate control channel;

determining whether there are any secondary primary candidate control channels; and

responsive to determining that there is a secondary primary candidate control channel, attempting to select the secondary primary candidate control channel.

4. The mobile station of claim 1, wherein the incompatibility comprises:

a mismatch between a service sought by the mobile station and a service provided by the primary candidate control channel.

5. A mobile station, comprising:

a processor;

a memory having stored thereon program instructions which, when executed by the processor, cause the processor to perform operations comprising;

determining whether any candidate control channels, of a list of candidate control channels, are incompatible with the mobile station by belonging to a private network to which the mobile station is not permitted access;

determining whether any of the candidate control channels that do not belong to the private network to which the mobile station is not permitted access are incompatible; and

responsive to determining that a candidate control channel is incompatible, marking the candidate control channel determined to be incompatible as ineligible, wherein once the candidate control channel is marked ineligible, the marked candidate control channel is not considered for selection in a selection process.

6. The mobile station of claim 5, wherein the candidate control channels that do not belong to the private network to which the mobile station is not permitted access are determined to be incompatible with the mobile station due to a mismatch between a service or system provided by a candidate control channel and a corresponding service or system associated with the mobile station.

7. A mobile station, comprising:

a processor;

a memory configured to store data identifying a plurality of candidate control channels and a parameter associated with each of the plurality of candidate control channels, the memory further having stored thereon program instructions which, when executed by the processor, cause the processor to perform operations comprising;

determining whether the parameter associated with of a candidate control channel is incompatible with a corresponding parameter of the mobile station; and

responsive to determining that the parameter associated with a candidate control channel is incompatible with the corresponding parameter of the mobile station, marking, as ineligible, the candidate control channel for which the parameter is determined to be incompatible with the corresponding parameter of the mobile station.

8. The mobile station of claim 7, wherein the data is in the form of a list.

9. The mobile station of claim 7, wherein the parameter is selected from a group of parameters consisting of a system type, a service type, a cell type, a protocol version, and a cell sync.

10. The mobile station of claim 9, wherein the parameter is a system type selected from a group of system types consisting of private, public, and semi-private.

11. The mobile station of claim 9, wherein the parameter is a service type selected from a group of service types consisting of voice service, data service, and facsimile service.

12. The mobile station of claim 7, wherein the program instructions, in causing the processor to perform determining whether the parameter associated with a candidate control channel is incompatible with a corresponding parameter of the mobile station, cause the processor to perform scanning the data in accordance with a control program stored in the memory.

13. The mobile station of claim 7, wherein the program instructions, in causing the processor to perform marking, as ineligible, the candidate control channel for which the parameter is incompatible with the corresponding parameter of the mobile station, cause the processor to perform setting an eligibility flag associated with the ineligible candidate control channel to an ineligible state.

14. The mobile station of claim 7, wherein the program instructions, in causing the processor to perform marking, as ineligible, the candidate control channel for which the parameter is incompatible with the corresponding parameter of the mobile station, cause the processor to perform removing the candidate control channel that is determined to be incompatible with the mobile station from consideration for selection as a primary control channel.

15. The mobile station of claim 7, the memory further having stored thereon program instructions which, when executed by the processor, cause the processor to perform operations comprising:

identifying a primary control channel among any of the candidate control channels for which the identifying data was not marked ineligible;

attempting to select the identified primary control channel;

responsive to successfully selecting the identified primary control channel, camping on the identified primary control channel; and

responsive to unsuccessfully selecting the identified primary control channel due to an incompatibility between the mobile station and the identified primary control channel, marking as ineligible the identified primary control channel.

16. A method associated with a mobile station storing data identifying a plurality of candidate control channels, the mobile station and each of the plurality of candidate control channels having a service type and a system type associated therewith, the data further identifying the service type and/or the system type of each of the plurality of candidate control channels, the method comprising:

determining, by a processor, whether the service type or the system type of each of the plurality of candidate control channels is incompatible with the respective service type or system type associated with the mobile station; and

responsive to determining that the service type or the system type of a candidate control channel is incompatible with the respective service type or system type associated with the mobile station, marking, as ineligible, the candidate control channel for which the service type or the system type associated therewith is determined to be incompatible with the service type or the system type associated with the mobile station.

17. The method of claim 16, wherein the data is in the form of a list, and the method further comprises:

determining by the processor, whether any of the plurality of candidate control channels are ineligible for selection by belonging to a private network to which the mobile station is not permitted access;

analyzing, by the processor, candidate control channels not determined to be ineligible for selection to identify a primary candidate control channel;

attempting to select the primary candidate control channel, and

responsive to a failure in an attempt to select the primary candidate control channel, determining whether the failure to select is attributable to an incompatibility; and

responsive determining that the failure to select is attributable to an incompatibility, marking the primary candidate control channel as ineligible.

18. The method of claim 16, wherein marking includes removing each of the plurality of candidate control channels that are determined to be incompatible with the mobile station from consideration in a selection process.

19. The method of claim 16, further comprising:

identifying a primary control channel among any of the candidate control channels not marked ineligible;

attempting to select the identified primary control channel;

responsive to successfully selecting the identified primary control channel, camping on the identified primary control channel; and

responsive to unsuccessfully selecting the identified primary control channel due to an incompatibility between the mobile station and the identified primary control channel, marking as ineligible the identified primary control channel.

20. The method of claim 19, further comprising:

responsive to unsuccessfully selecting the identified primary control channel, identifying a secondary primary control channel, attempting to select the identified secondary primary control channel, camping on the identified secondary primary control channel responsive to successfully selecting the identified secondary primary control channel, and marking as ineligible the identified secondary primary control channel responsive to unsuccessfully selecting the identified secondary primary control channel.

21. The method of claim 17, further comprising:

determining whether any candidate control channels, of a list of candidate control channels, are ineligible for selection by belonging to a private network to which the mobile station is not permitted access.