Targeted PLMN Search

• US 20150341846A1
• Filed: 05/20/2014
• Published: 11/26/2015
• Est. Priority Date: 05/20/2014
• Status: Active Application

• Current Assignee: Apple Inc.
• Original Assignee: Apple Inc.
• Inventors: Shi, Jianxiong, Zhang, Qin
• Application Number:
  US14/282,772
• Publication Number:
  US 20150341846A1
• Time in Patent Office: Days
• US Class Current: 1/1
• 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 64/00 Locating users or terminals or network equipment for network management purposes, e.g. mobility management

Abstract

Targeted public land mobile network (PLMN) search by a wireless user equipment (UE) device. A PLMN search may be initiated at the UE. It may be determined whether PLMN search targeting information is available. A targeted PLMN search may be performed if PLMN search targeting information is available. Targeting the PLMN search may include reducing the number of frequencies or frequency bands searched as part of the PLMN search.

Claims

1. A wireless user equipment (UE) device, comprising:

a radio; and

a processing element operably coupled to the radio,

wherein the radio and the processing element are configured to;

initiate a public land mobile network (PLMN) search;

determine one or more mobile country codes (MCCs) corresponding to a current location of the UE;

determine one or more frequencies, frequency bands, or radio access technologies (RATs) associated with the one or more MCCs; and

perform a targeted PLMN search on the determined one or more frequencies, frequency bands, or RATs associated with the one or more MCCs.

2. The UE of claim 1,

wherein the targeted PLMN search excludes searching for PLMNs on one or more frequencies, frequency bands, or RATs not associated with the one or more MCCs.

3. The UE of claim 1, wherein the radio and the processing element are further configured to:

determine one or more PLMNs associated with the one or more MCCs;

identify the one or more PLMNs associated with the one or more MCCs during the targeted PLMN search; and

terminate the targeted PLMN search after identifying the one or more PLMNs associated with the one or more MCCs are identified.

4. The UE of claim 3,

wherein terminating the targeted PLMN search after identifying the one or more PLMNs associated with the one or more MCCs are identified prevents the UE from further searching on the determined one or more frequencies, frequency bands, or RATs.

5. The UE of claim 1, wherein the radio and the processing element are further configured to:

determine a preferred search order in which to perform the targeted PLMN search, wherein the preferred search order prioritizes the determined one or more frequencies, frequency bands, or RATs, wherein the radio and the processing element are further configured to perform the targeted PLMN search according to the preferred search order.

6. The UE of claim 1, wherein the radio and the processing element are further configured to:

obtain information indicating that the one or more frequencies, frequency bands, or RATs associated with the one or more MCCs are associated with the one or more MCCs from a server.

7. The UE of claim 1, wherein the radio and the processing element are configured to determine the one or more MCCs corresponding to the current location of the UE based on one or more of:

a serving cell of the UE;

a cell detected by the UE;

global navigational satellite system (GNSS) based location information;

terrestrial broadcast information;

a Wi-Fi beacon;

a database local or external to the UE comprising information correlating one or more types of location information with one or more MCCs.

8. The UE of claim 1, wherein the PLMN search comprises one of:

a manual PLMN search;

a background PLMN search;

or

a foreground PLMN search.

9. A non-transitory computer accessible memory medium comprising program instructions which, when executed at a wireless user equipment (UE) device, cause the UE to:

determine a set of radio access technologies (RATs) and frequency bands which the UE is capable of searching for public land mobile networks (PLMNs);

determine a location of the UE;

determine a set of PLMNs associated with the location;

search the set of RATs and frequency bands for the determined set of PLMNs; and

abort further search after identifying all PLMNs in the determined set of PLMNs.

10. The memory medium of claim 9, wherein when executed the program instructions further cause the UE to:

determine a subset of the set of RATs and frequency bands based at least in part on the location of the UE and the set of PLMNs associated with the location,

wherein searching the set of RATs and frequency bands for the determined set of PLMNs excludes searching RATs and frequency bands not in the determined subset.

11. The memory medium of claim 9, wherein the PLMN search comprises a manual PLMN search, wherein when executed the program instructions further cause the UE to:

receive user input initiating the manual PLMN search;

provide a user interface indicating results of the manual PLMN search;

receive user input selecting a PLMN; and

establish a wireless communication link with the selected PLMN.

12. The memory medium of claim 9, wherein when executed the program instructions further cause the UE to:

determine a preferred RAT search order,

wherein searching the set of RATs and frequency bands for the determined set of PLMNs comprises searching in the preferred RAT search order.

13. A method for operating a wireless user equipment (UE) device, the method comprising:

initiating a public land mobile network (PLMN) search;

determining whether PLMN search targeting information is available; and

performing a targeted PLMN search if PLMN search targeting information is available,

wherein performing the targeted PLMN search comprises reducing a number of frequencies, frequency bands, and/or radio access technologies (RATs) on which PLMNs are searched for based on the PLMN search targeting information.

14. The method of claim 13,

wherein the PLMN search targeting information is location related.

15. The method of claim 13,

wherein the PLMN search targeting information comprises one or more mobile country codes (MCCs) corresponding to a location of the UE.

16. The method of claim 15, wherein the PLMN search targeting information further comprises information regarding one or more of:

carriers known to operate in countries represented by the one or more MCCs;

frequencies deployed by carriers known to operate in countries represented by the one or more MCCs;

RATs known to be deployed in countries represented by the one or more MCCs;

frequency bands known to be deployed in countries represented by the one or more MCCs.

17. The method of claim 13,

wherein performing the targeted PLMN search comprises searching only frequencies, frequency bands, and/or RATs known to be deployed in countries represented by the one or more MCCs.

18. The method of claim 13,

wherein performing the targeted PLMN search further comprises:

determining that PLMNs corresponding to all carriers known to operate in countries represented by the one or more MCCs have been acquired; and

aborting further search based on said determining.

19. The method of claim 13, the method further comprising:

receiving the PLMN search targeting information from a server.

20. The method of claim 19,

wherein the PLMN search targeting information is generated by the server based on crowd-sourced information harvesting.