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Method and user equipment for maintaining PLMN (public land mobile network) information

A technology for user equipment and universal mobile communication, applied to a method for maintaining PLMN information and the field of user equipment, to achieve the effects of improving processing efficiency, avoiding the PLMN selection process, and avoiding the ping-pong effect

Active Publication Date: 2013-01-16
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0021] Embodiments of the present invention provide a method for maintaining PLMN information and user equipment, which are used to solve the problem in the prior art that unnecessary PLMN selection processes are likely to be caused during the UE's PLMN selection process

Method used

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  • Method and user equipment for maintaining PLMN (public land mobile network) information
  • Method and user equipment for maintaining PLMN (public land mobile network) information
  • Method and user equipment for maintaining PLMN (public land mobile network) information

Examples

Experimental program
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Embodiment 1

[0082] Embodiment one, see image 3 As shown, this embodiment includes the following steps:

[0083] Step 31, when the UE stores the PLMN information in the "PLMNs not preferred for voice service" list, record the reason why the UE cannot obtain the voice service in the PLMN corresponding to the PLMN information;

[0084] Step 32, UE reactivates (re-enable) its E-UTRAN capability, and determines that the current value of its E-URAN VDP is "IMS PS voice only" or "IMS PS voice preferred, CS voice as secondary";

[0085] Step 33. For each piece of PLMN information that has been stored, determine whether the reason why the voice service cannot be obtained corresponding to the piece of PLMN information is a specified reason;

[0086] If yes, execute step 34;

[0087] If not, then execute step 35;

[0088] Step 34. The UE retains the PLMN information in the "PLMNs not preferred for voice service" list; since the PLMN information is still stored in the "PLMNs not preferred for voice...

Embodiment 2

[0090] Embodiment two, see Figure 4 As shown, this embodiment includes the following steps:

[0091] Step 41. When the UE stores the PLMN information in the "PLMNs not preferred for voice service" list, record the reason why the UE cannot obtain the voice service in the PLMN corresponding to the PLMN information. The reason for obtaining the voice service is one of the reasons for "IMS voice not available" stipulated in the 3GPP agreement;

[0092] Step 42, UE activates its E-UTRAN capability again, and determines that the current value of its E-URAN VDP is "IMS PS voice only" or "IMS PS voice preferred, CS voice as secondary", according to each stored PLMN The information corresponds to the reason why the voice service cannot be obtained, and the corresponding PLMN information is processed;

[0093] Step 42 further includes:

[0094] Step 42a, if the reason why the voice service cannot be obtained corresponding to the PLMN information is the reason 1, 3 or 4b specified in...

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Abstract

The invention relates to the technical field of communication, in particular to a method and user equipment for maintaining PLMN (public land mobile network) information. The method and the user equipment are used for solving the problem that an unnecessary PLMN selection process is easy to occur when UE (user equipment) in the prior art is used for selecting a PLMN. The method in an embodiment of the invention includes that the user equipment which stores at least one piece of PLMN information and cannot acquire voice service in a PLMN corresponding to each piece of PLMN information activates self E-UTRAN [evolved UMTS (universal mobile telecommunications system) terrestrial radio access network] capacity; and when a current value of VDP (voice domain preference) of an E-UTRAN of the user equipment is changed into IMS [IP (internet protocol) multimedia subsystem] packet domain voice only, or the IMS packet domain voice is preferred while circuit domain voice is secondarily preferred, each piece of PLMN information is processed according to reasons that the voice service cannot be acquired in the PLMN corresponding to the piece of PLMN information. The method and the user equipment have the advantages that unnecessary PLMN selection processes can be effectively avoided, and processing efficiency is improved.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, in particular to a method for maintaining PLMN information and user equipment. Background technique [0002] 3GPP (The 3rd Generation Partnership Project 3rd Generation Partnership Cooperation) proposes a method for user equipment (User Equipment, UE) to select a public land mobile network (Public Land Mobile Network, PLMN) in order to realize a voice service (voice service). Program. Specifically: If the PLMN selected by the UE includes "IMS voice not available" (IMS (IP Multimedia Subsystem, IP Multimedia Subsystem) voice service is not available), and the PLMN does not support CSFB (Circuit Switched Failback, circuit switched service fallback ), the UE needs to first deactivate its E-UTRAN (Evolved UMTS (Universal Mobile Telecommunications System, Universal Mobile Communications System) Terrestrial Radio Access Network, Evolved UMTS Terrestrial Radio Access Network) cap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W48/18
Inventor 王胡成
Owner DATANG MOBILE COMM EQUIP CO LTD
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