Optimization for priority-based network identifier scans

Patent metadata

Field	Value
Publication number	US-11197237-B2
Application number	US-202016896298-A
Country	US
Kind code	B2
Filing date	Jun 9, 2020
Priority date	Feb 17, 2017
Publication date	Dec 7, 2021
Grant date	Dec 7, 2021

Abstract

Battery life of a user equipment (UE) can be extended when the UE is roaming internationally in a country that has multiple carrier networks each utilizing multiple public land mobile network (PLMN) identifiers. Scan control tables, stored in a universal integrated circuit card (UICC) of the UE, are populated with the identifiers of a PLMN having the highest priority in a defined area (e.g., Circle). A roaming control applet of the UICC can compare serving cell data with the scan control tables to determine if the UE is to perform a higher priority (HP) PLMN search. Utilization of the scan control table avoids unnecessary searches for HPPLMNs that are unavailable in the UE's current location and accordingly extends battery life of the UE.

First claim

What is claimed is:

1. A method, comprising:
obtaining, by a user equipment comprising a processor, priority data and scan control data, wherein the priority data comprises a ranked list of network identifiers of networks deployed within a geographical area, and the scan control data comprising a group of the network identifiers that are respectively determined to have ranks satisfying a ranking criterion within different regions of the geographical area; and
in response to determining that a first network identifier for a first cell on which the user equipment is currently operating is part of the group of the network identifiers in the scan control data, decreasing, by the user equipment, a frequency of scans for detection of a second cell that has a second network identifier that is determined to have a higher rank according to the priority data than the first network identifier.

2. The method of claim 1 , wherein decreasing the frequency of scans comprises disabling the scans.

3. The method of claim 1 , wherein obtaining the priority data and the scan control data is in response to the user equipment roaming within a country where respective network equipment of the networks utilize different network identifiers in the different regions of the geographical area of the country.

4. The method of claim 1 , wherein obtaining the priority data and the scan control data is in response to a determination that the user equipment will travel within a country where respective network equipment of the networks utilize different network identifiers in the different regions of the geographical area of the country.

5. The method of claim 1 , wherein obtaining the priority data and the scan control data is in response to a determination that the user equipment will connect to a network within a country where respective network equipment of the networks utilize different network identifiers in the different regions of the geographical area of the country.

6. The method of claim 1 , wherein obtaining the priority data and the scan control data is in response to a determination that the user equipment has registered to use a network within a country where respective network equipment of the networks utilize different network identifiers in the different regions of the geographical area of the country.

7. The method of claim 1 , further comprising, in response to determining that the first network identifier is not part of the group of the network identifiers in the scan control data, scanning, by the user equipment, for the second cell that has the second network identifier that is determined to have the higher rank according to the priority data than the first network identifier.

8. A user equipment, comprising:
a processor; and
a memory that stores executable instructions that, when executed by the processor, facilitate performance of operations, comprising:
obtaining priority data and scan control data, wherein the priority data comprises a ranked list of network identifiers associated with carrier networks deployed within a geographical area, and the scan control data comprises a group of the network identifiers that are respectively determined to have ranks satisfying a ranking criterion within different portions of the geographical area; and
in response to determining that a serving network identifier for a serving cell on which the user equipment is currently operating is part of the group of the network identifiers in the scan control data, decreasing, by the user equipment, a frequency of scans for detecting a target cell that has a target cell identifier that is determined to have a higher rank according to the priority data than the serving network identifier.

9. The user equipment of claim 8 , wherein decreasing the frequency of scans comprises disabling the scans.

10. The user equipment of claim 8 , wherein obtaining the priority data and the scan control data is in response to the user equipment roaming within a country where network devices associated with the carrier networks utilize different network identifiers in the different portions of the geographical area of the country.

11. The user equipment of claim 8 , wherein obtaining the priority data and the scan control data is in response to a determination that the user equipment will travel within a country where network devices associated with the carrier networks utilize different network identifiers in the different portions of the geographical area of the country.

12. The user equipment of claim 8 , wherein obtaining the priority data and the scan control data is in response to a determination that the user equipment will connect to a carrier network within a country where network devices associated with the carrier networks utilize different network identifiers in the different portions of the geographical area of the country.

13. The user equipment of claim 8 , wherein obtaining the priority data and the scan control data is in response to a determination that the user equipment has registered with a carrier network within a country where network devices associated with the carrier networks utilize different network identifiers in the different portions of the geographical area of the country.

14. The user equipment of claim 8 , where the operations further comprise, in response to determining that the serving network identifier is not part of the group of the network identifiers in the scan control data, scanning, by the user equipment, for the target cell that has the target cell identifier that is determined to have the higher rank according the priority data than the serving network identifier.

15. A non-transitory machine-readable medium, comprising executable instructions that, when executed by a processor of a user equipment, facilitate performance of operations, comprising:
obtaining priority data and scan control data, wherein the priority data comprises a ranked list of network identifiers of mobile networks deployed within a geographical area, and the scan control data comprising a group of the network identifiers that are respectively determined to have ranks satisfying a ranking criterion within different service areas of the geographical area; and
in response to determining that a first network identifier for a first cell on which the user equipment is currently operating is part of the group of the network identifiers in the scan control data, decreasing a frequency of scans used to detect a second cell that has a second cell identifier that is determined to have a higher rank according to the priority data than the first network identifier.

16. The non-transitory machine-readable medium of claim 15 , wherein decreasing the frequency of scans comprises disabling the scans.

17. The non-transitory machine-readable medium of claim 15 , wherein obtaining the priority data and the scan control data is in response to the user equipment roaming within a country where network equipment associated with the mobile networks utilize different network identifiers in the different service areas of the geographical area of the country.

18. The non-transitory machine-readable medium of claim 15 , wherein obtaining the priority data and the scan control data is in response to a determination that the user equipment will travel within a country where network equipment associated with the mobile networks utilize different network identifiers in the different service areas of the geographical area of the country.

19. The non-transitory machine-readable medium of claim 15 , wherein obtaining

Assignees

• At & T Mobility Ii Llc

Inventors

• Ahluwalia Inderpreet Singh

Classifications

• H04W36/144

  over a different radio air interface technology · CPC title

• H04W8/12

  between location registers or mobility servers · CPC title

• H04W8/06

  Registration at serving network Location Register, VLR or user mobility server · CPC title

• H04W84/042

  Public Land Mobile systems, e.g. cellular systems · CPC title

• Y02D30/70

  in wireless communication networks · CPC title