CN113766486B

CN113766486B - Method and equipment for correcting home public land mobile network identifier

Info

Publication number: CN113766486B
Application number: CN202111117169.1A
Authority: CN
Inventors: 倪金金
Original assignee: Spreadtrum Communications Shanghai Co Ltd
Current assignee: Spreadtrum Communications Shanghai Co Ltd
Priority date: 2021-09-23
Filing date: 2021-09-23
Publication date: 2024-03-26
Anticipated expiration: 2041-09-23
Also published as: WO2023045776A1; CN113766486A

Abstract

The embodiment of the application provides a method and equipment for correcting home public land mobile network identifiers, wherein the method comprises the following steps: after the UE is started, acquiring MNC length indication information of an HPLMN in the SIM card; when MNC length indication information is invalid, acquiring the first two digits and MCC of MNC corresponding to HPLMN, acquiring the memory of UE and/or PLMN stored in SIM card, and determining the first PLMN with the same first two digits of MCC and MNC in each PLMN as HPLMN; and determining an HPLMN identifier corresponding to the HPLMN according to the MNC length of the first PLMN. In the embodiment of the present application, when the MNC length indication information of the HPLMN is invalid, the effective length of the MNC in the HPLMN identifier may be corrected according to the existing PLMN information, so that the UE may accurately obtain the HPLMN identifier.

Description

Method and equipment for correcting home public land mobile network identifier

Technical Field

The embodiment of the application relates to the technical field of mobile communication, in particular to a method and equipment for correcting Home public land mobile network (Home PLMN, abbreviated as HPLMN) identifiers.

Background

In a mobile communication system, a User Equipment (UE) needs to obtain an HPLMN identifier from an international mobile subscriber identity (International Mobile Subscriber Identity, IMSI) of a subscriber identity module (Subscriber Identity Model, SIM) card in some specific scenarios.

The HPLMN identifier (also called HPLMN ID) comprises a mobile country code (Mobile Country Code, MCC) and a mobile network code (Mobile Network Code, MNC), wherein the length of the MCC is fixed to be 3 digits (the effective value is 0-9); the effective length of MNC is 2 bits or 3 bits, when the effective length of MNC is 2 bits, MNC3 is 0xF, and when the effective length of MNC is 3 bits, MNC3 is a number of 0-9. Wherein, the effective length of MNC takes 2 bits or 3 bits according to SIM card EF _AD MNC length indication information of HPLMN in the file.

However, in practical application, the SIM card EF _AD The MNC length indication information of the HPLMN in the file may have a missing or erroneous situation, which may cause that the UE cannot obtain the accurate HPLMN identifier, and further cause that the UE has an error in some scenes where the HPLMN identifier needs to be used.

Disclosure of Invention

The embodiment of the application provides a correction method and correction equipment for an HPLMN (high Performance liquid Crystal network) identifier, which can solve the problem that in the prior art, a SIM card EF is used as a SIM card _AD When MNC length indication information of the HPLMN in the file is missing or wrong, the UE may not accurately obtain the technical problem of the HPLMN identifier.

In a first aspect, an embodiment of the present application provides a method for correcting an HPLMN identifier, where the method includes:

After the UE is started, acquiring MNC length indication information of an HPLMN in the SIM card, and determining whether the MNC length indication information is valid or not;

when the MNC length indication information is invalid, acquiring the first two digits and MCC of MNC corresponding to HPLMN, acquiring a memory of UE and/or PLMN stored in the SIM card, and determining the first PLMN with the same MNC and MCC as HPLMN in each PLMN;

and determining an HPLMN identifier corresponding to the HPLMN according to the MNC length of the first PLMN.

In a possible implementation manner, the obtaining MNC length indication information of the HPLMN in the SIM card and determining whether the MNC length indication information is valid includes:

acquiring EF in SIM card _AD Files, determining the EF _AD The MNC length in the file indicates whether bytes are missing;

when the MNC length indication byte is not deleted and the MNC length indicated by the MNC length indication byte is correct, determining that the MNC length indication information is valid;

and when the MNC length indication byte is missing or the MNC length indication byte is not missing and the MNC length indicated by the MNC length indication byte is wrong, determining that the MNC length indication information is invalid.

In a possible implementation manner, the determining, according to the MNC length of the first PLMN, an HPLMN identifier corresponding to the HPLMN includes:

When the MNC length of each first PLMN is 2 bits, determining that the MNC effective length of the HPLMN identifier is 2 bits, and setting the third bit of the MNC in the HPLMN identifier to be 0xF;

and when the MNC length of each first PLMN is 3 bits, determining that the MNC effective length of the HPLMN identifier is 3 bits, and determining the value of the third bit of the MNC in the HPLMN identifier according to the IMSI of the SIM card.

when one part of MNC length of the first PLMN is 2 bits and the other part of MNC length of the first PLMN is 3 bits, determining a first target value of a third bit of MNC in the HPLMN identifier according to the IMSI of the SIM card;

if the first target value is the same as the third bit of the MNC of any one of the first PLMNs, determining that the effective length of the MNC of the HPLMN identifier is 3 bits, and setting the third bit of the MNC in the HPLMN identifier as the first target value;

and if the first target value is different from the third bit of the MNC of each first PLMN, determining that the effective length of the MNC of the HPLMN identifier is 2 bits, and setting the third bit of the MNC in the HPLMN identifier to be 0xF.

In a possible implementation manner, after the acquiring each PLMN stored in the UE and/or the SIM card, the method further includes:

and if the first PLMN does not exist in each PLMN, determining that the effective length of MNC of the HPLMN identifier is 2 bits, and setting the third bit of MNC in the HPLMN identifier to 0xF.

In a possible implementation manner, after determining the HPLMN identifier corresponding to the HPLMN, the method further includes:

after the UE searches each PLMN to be selected corresponding to the current network environment, if the MNC length indication information is invalid and the currently determined MNC effective length of the HPLMN identifier is 2 digits, determining whether a second PLMN with the same MCC and MNC as the HPLMN exists in each PLMN to be selected or not;

when the second PLMNs exist and the MNC length of each second PLMN is 2 bits, keeping the MNC in the HPLMN identifier unchanged;

when the second PLMN with the MNC length of 3 bits exists, determining a second target value of the third bit of MNC in the HPLMN identification according to the IMSI of the SIM card; if the second target value is the same as the value of the third bit of the MNC of any one of the second PLMNs, determining that the effective length of the MNC of the HPLMN identifier is 3 bits, and setting the third bit of the MNC in the HPLMN identifier as the second target value; and if the second target value is different from the third bit of the MNC of each second PLMN, keeping the MNC in the HPLMN identifier unchanged.

after the UE searches each PLMN to be selected corresponding to the current network environment, if the MNC length indication information is valid and the MNC length indication information indicates that the MNC effective length of the HPLMN identifier is 2 digits, determining whether there is a third PLMN with MCC and MNC in the first two digits being the same as the HPLMN in each PLMN to be selected;

when the third PLMNs exist and the effective MNC length of each third PLMN is 3 bits, determining a third target value of the third bits of the MNCs in the HPLMN identifier according to the IMSI of the SIM card, if the third target value is the same as the third bits of the MNCs of any one of the third PLMNs, determining that the effective MNC length of the HPLMN identifier is 3 bits, and setting the third bits of the MNCs in the HPLMN identifier as the third target value;

when the third PLMN is not present, the MNC in the HPLMN identity is kept unchanged.

In a second aspect, an embodiment of the present application provides a correction apparatus for home public land mobile network identifier, where the apparatus includes:

the judging module is used for acquiring MNC length indication information of the HPLMN in the SIM card after the UE is started and determining whether the MNC length indication information is effective or not;

The searching module is used for acquiring the first two digits and MCC of the MNC corresponding to the HPLMN when the MNC length indication information is invalid, acquiring a memory of the UE and/or PLMN stored in the SIM card, and determining the first PLMN with the same MNC first two digits and MCC as the HPLMN in each PLMN;

and the processing module is used for determining an HPLMN identifier corresponding to the HPLMN according to the MNC length of the first PLMN.

In a third aspect, an embodiment of the present application provides a user equipment, including: at least one processor and memory;

the memory stores computer-executable instructions;

the at least one processor executes computer-executable instructions stored by the memory to cause the at least one processor to perform a method of modifying an HPLMN identification as provided in the first aspect.

In a fourth aspect, embodiments of the present application provide a computer readable storage medium having stored therein computer executable instructions that, when executed by a processor, implement a method for modifying an HPLMN identifier as provided in the first aspect.

In a fifth aspect, embodiments of the present application provide a computer program product comprising a computer program which, when executed by a processor, implements a method of modifying an HPLMN identification as provided in the first aspect.

The correction method and device for HPLMN identifier provided by the embodiment of the application are used as the SIM card EF _AD When the MNC length indication information of the HPLMN in the file is missing or wrong, the effective length of the MNC in the HPLMN identification can be corrected according to the existing PLMN information, so that the UE can accurately acquire the HPLMN identification.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief description will be given below of the drawings that are needed in the embodiments of the present application or the description of the prior art, and it is obvious that the drawings in the following description are some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.

Fig. 1 is a schematic architecture diagram of a wireless communication system according to an embodiment of the present application;

fig. 2 is a flow chart of a method for correcting HPLMN identification provided in an embodiment of the present application;

fig. 3 is a flowchart of another method for correcting HPLMN identification provided in an embodiment of the present application;

fig. 4 is a flowchart of another method for correcting HPLMN identification provided in an embodiment of the present application;

Fig. 5 is a schematic program module of a correction device for HPLMN identification according to an embodiment of the present application;

fig. 6 is a schematic hardware structure of a user equipment according to an embodiment of the present application.

Detailed Description

For the purposes of making the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions of the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is apparent that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure. Furthermore, while the disclosure is presented in the context of an exemplary embodiment or embodiments, it should be appreciated that the various aspects of the disclosure may, separately, comprise a complete embodiment.

It should be noted that the brief description of the terms in the present application is only for convenience in understanding the embodiments described below, and is not intended to limit the embodiments of the present application. Unless otherwise indicated, these terms should be construed in their ordinary and customary meaning.

The terms first, second and the like in the description and in the claims and in the above-described figures are used for distinguishing between similar or similar objects or entities and not necessarily for describing a particular sequential or chronological order, unless otherwise indicated. It is to be understood that the terms so used are interchangeable under appropriate circumstances such that the embodiments of the application are, for example, capable of operation in sequences other than those illustrated or otherwise described herein.

Furthermore, the terms "comprise" and "have," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a product or apparatus that comprises a list of elements is not necessarily limited to those elements expressly listed, but may include other elements not expressly listed or inherent to such product or apparatus.

The term "module" as used in this application refers to any known or later developed hardware, software, firmware, artificial intelligence, fuzzy logic, or combination of hardware and/or software code that is capable of performing the function associated with that element.

The embodiments of the present application may be applied to various communication systems, for example: global system for mobile communications (Global System of Mobile communication, GSM), code division multiple access (Code Division Multiple Access, CDMA) system, wideband code division multiple access (Wideband Code Division Multiple Access, WCDMA) system, long term evolution (Long Term Evolution, LTE) system, long term evolution advanced (Advanced long term evolution, LTE-a) system, new Radio (NR) system, evolved system of NR system, LTE-based access to unlicensed spectrum, LTE-U system over unlicensed spectrum, NR (NR-based access to unlicensed spectrum, NR-U) system over unlicensed spectrum, universal mobile telecommunications system (Universal Mobile Telecommunication System, UMTS), etc.

Referring to fig. 1, fig. 1 is a schematic architecture diagram of a wireless communication system according to an embodiment of the present application. The wireless communication system provided in this embodiment includes a UE101 and a network device 102.

Alternatively, the UE101 can be various forms of user equipment, access terminal, subscriber unit, subscriber station, mobile Station (MS), remote station, remote terminal, mobile device, terminal device (terminal equipment), wireless communication device, user agent, or user equipment. But also a cellular phone, a cordless phone, a session initiation protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a palm top computer (Personal Digital Assistant, PDA), a handheld device with wireless communication capability, a computing device or other processing device connected to a wireless modem, a car-mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved public land mobile network (Public Land Mobile Network, PLMN) etc., as long as the UE101 is capable of wireless communication with the network device 102.

The network device 102, i.e. public mobile communication network device, is an interface device for accessing the internet by the UE101, and is also a form of a radio Station, which refers to a radio transceiver Station for performing information transfer with the UE101 in a certain radio coverage area, and includes a Base Station (BS) which may also be referred to as a Base Station device, and is a device deployed in a radio access network (Radio Access Network, RAN) to provide a wireless communication function. For example, the device for providing a base station function in the 2G network includes a base radio transceiver station (Base Transceiver Station, abbreviated as BTS), the device for providing a base station function in the 3G network includes a node B (NodeB), the device for providing a base station function in the 4G network includes an evolved NodeB (eNB), the device for providing a base station function in the wireless local area network (Wireless Local Area Networks, abbreviated as WLAN) is an Access Point (AP), the device for providing a base station function in the 5G NR includes a nb, and a continuously evolved NodeB (ng-eNB), wherein the nb and the UE communicate by using NR technology, the nb and the UE communicate by using evolved universal terrestrial radio Access network (Evolved Universal Terrestrial Radio Access, abbreviated as E-UTRA) technology, and the nb and the ng-eNB are both connectable to the 5G core network. The network device 102 in the embodiment of the present application also includes a device that provides a base station function in a new communication system in the future, and the like.

In a mobile communication system, a public land mobile network (public land mobile network, abbreviated PLMN) refers to a network established and operated by a network operator to provide a public land mobile service. When the PLMN accessed by the UE is inconsistent with the corresponding PLMN in the SIM card, the UE generally performs reselection by adopting a network reselection mode. For example, the mobile terminal may search for the HPLMN identifier according to information pre-stored in the SIM card.

Wherein, the HPLMN mark usually comprises two parts of MCC and MNC, the MCC is fixed to be 3 digits (the effective value is 0-9); the effective length of MNC is 2 bits or 3 bits, when the effective length of MNC is 2 bits, the value of MNC3 of the third bit of MNC is 0xF, and when the effective length of MNC is 3 bits, the value of MNC3 is a number of 0-9. For example, the MNC effective length of a certain HPLMN is 2 digits, MCC is 460, and the first two digits of MNC are 0, then its corresponding HPLMN is identified as 460 00f; the MNC effective length of a certain HPLMN is 3 bits, the 3 bits of MCC is 310 and the 3 bits of MNC is 016, then it is identified as 310 016 for the corresponding HPLMN.

In some embodiments, the effective length of the MNC is determined by taking 2 bits or 3 bits according to a basic File (EF) pre-stored in the SIM card.

Specifically, the effective length of the MNC may take 2 bits or 3 bits according to pre-stored EF in the SIM card _AD MNC length indication information of HPLMN in the file. Wherein EF is _AD The file is a Administrative Data file in the SIM card, indicating some information corresponding to the current SIM card, where the 4 th byte is used to indicate the effective length of the MNC in the IMSI.

In practical application, the EF _AD The MNC length indication information of the HPLMN in the file may have a missing or erroneous situation, which may cause that the UE cannot obtain the accurate HPLMN identifier, and further cause that the UE may have errors in some scenes where the HPLMN identifier needs to be used, such as network selection, air interface interaction, NV configuration file loading, and other scenes.

In order to solve the above technical problems, embodiments of the present application provide a method for correcting an HPLMN identifier, when a SIM card EF _AD When the MNC length indication information of the HPLMN in the file is missing or wrong, the effective length of the MNC in the HPLMN identification can be corrected according to the existing PLMN information, so that the UE can accurately acquire the HPLMN identification. The following will explain in detail the embodiments.

Referring to fig. 2, fig. 2 is a flow chart of a method for correcting HPLMN identification provided in an embodiment of the present application. In one possible embodiment, the method comprises:

S201, after the UE is started, MNC length indication information of the HPLMN in the SIM card is obtained, and whether the MNC length indication information is effective or not is determined.

In one possible implementation, after the UE is powered on, the EF in the SIM card is obtained _AD Files, determining the EF _AD The MNC length in the file indicates whether bytes are missing; when the MNC length indication byte is not missing and the MNC length indicated by the MNC length indication byte is correct (indicating number 2 or 3), determining that the MNC length indication information is valid; when the MNC length indication byte is missing or the MNC length indication byte is not missing but the MNC length indicated by the MNC length indication byte is wrong (the indication number is neither 2 nor 3), it is determined that the MNC length indication information is invalid.

Wherein the MNC length indication byte is EF _AD The 4 th byte in the file is used to indicate the effective length of the MNC.

The SIM card is also called a user identity card or a smart card, and is a communication module provided for a user by a network operator according to a user request, so that the network user can realize network communication with the operator network by utilizing data and a communication circuit on the SIM card, thereby realizing network communication service application of the terminal equipment.

It should be noted that, the SIM card may include SIM cards with various specifications and standards, which are not limited in the embodiments of the present application, as long as the user can be identified according to the information of the SIM card.

For example, the SIM card may be a normal SIM card, or may be a global subscriber identity card (Universal Subscriber Identity Module, USIM card); the SIM card may be a standard SIM card with a size of 25mm×15mm, a small SIM card with a size of 12mm×15mm (i.e., micro SIM), or a Micro SIM card with a size of 12mm×9mm (i.e., nano SIM).

In the supported network mode, the SIM card may be a SIM card applied to a second-generation mobile communication technology (2nd generation,2G) network, a SIM card (such as a USIM card) applied to a third-generation mobile communication technology (3rd generation,3G) network, or a SIM card applied to a fourth-generation mobile communication technology (4 g) network, or a SIM card applied to a fifth-generation mobile communication technology (5th generation,5G) network.

S202, when the MNC length indication information is invalid, acquiring the first two digits and MCC of the MNC corresponding to the HPLMN, acquiring the memory of the UE and/or PLMN stored in the SIM card, and determining the first PLMN with the same MNC first two digits and MCC as the HPLMN in each PLMN.

In a possible implementation manner, after determining that the MNC length indication information is invalid, the three digits of the MCC of the HPLMN and the first two digits of the MNC are obtained from the IMSI of the SIM card. And then acquiring PLMNs in the NV file stored in the memory of the UE and/or PLMNs stored in the SIM card.

Illustratively, the PLMN includes at least one of the following types:

an RPLMN (Registered PLMN), a PLMN Registered by the UE prior to last shutdown or off-network.

EPLMN (peer PLMN) is a PLMN that is in the same position as the PLMN currently selected by the UE.

EHPLMN (Equivalent Home PLMN, peer home PLMN), home PLMN that is co-located with the PLMN currently selected by the UE.

UPLMN (User Controlled PLMN ), parameters stored on USIM card for PLMN selection.

The OPLMN (Operator Controlled PLMN ), one parameter related to PLMN selection stored on the USIM card.

The FPLMN (Forbidden PLMN) is a Forbidden PLMN, and the UE will typically add to the list after attempting to access a PLMN is denied.

After obtaining PLMNs stored in the memory and/or the SIM card of the UE, determining the first PLMNs of the PLMNs, in which the first two digits and MCC of the MNC are the same as the first two digits and MCC of the MNC corresponding to the HPLMN.

For example, if the MCC of the HPLMN is 460 and the first two digits of the mnc are 00, if the obtained MCC of a certain PLMN is 460 and the first two digits of the mnc are also 00, the PLMN may be determined to be the first PLMN.

S203, determining an HPLMN identifier corresponding to the HPLMN according to the MNC length of the first PLMN.

In a possible implementation manner, after the first PLMN is determined, the effective length of the MNC corresponding to the HPLMN may be determined according to the MNC length of the first PLMN, so as to determine the HPLMN identifier corresponding to the HPLMN.

Based on the foregoing embodiments, referring to fig. 3, fig. 3 is a schematic flow chart of another method for correcting HPLMN identification provided in an embodiment of the present application. In one possible embodiment, the method comprises:

s301, when the UE is started, MNC length indication information of the HPLMN in the SIM card is obtained, and whether the MNC length indication information is effective or not is determined.

And S302, when the MNC length indication information is invalid, acquiring the first two digits and MCC of the MNC corresponding to the HPLMN, and acquiring a memory of the UE and/or PLMN stored in the SIM card.

S303, judging whether the first two MNCs and the first PLMN with the same MCC as the HPLMN exist in each PLMN. If yes, continuing to execute S304; if not, S308 is performed.

S304, determining MNC lengths of the first PLMNs. If the MNC length of each first PLMN is 2 bits, then executing S308; if the MNC length of each first PLMN is 3 bits, executing S305; if there is a part of the first PLMN having an MNC length of 2 bits and another part of the first PLMN having an MNC length of 3 bits, S306 and S307 are executed.

S305, determining that the effective length of MNC of the HPLMN identifier is 3 digits, and determining the value of the third digit of MNC in the HPLMN identifier according to the IMSI of the SIM card.

S306, determining a first target value of the third position of the MNC in the HPLMN identification according to the IMSI of the SIM card.

S307, it is determined whether the first target value is the same as the third bit of the MNC of any one of the first PLMNs. If the first target value is different from the third bit of MNC of each first PLMN, then S308 is executed; if the first target value is the same as the third bit of the MNC of any one of the first PLMNs, S309 is performed.

S308, determining that the effective length of MNC of the HPLMN identifier is 2 bits, and setting the third bit of MNC in the HPLMN identifier to 0xF.

S309, determining that the effective length of MNC of the HPLMN identifier is 3 bits, and setting the third bit of MNC in the HPLMN identifier as the first target value.

The correction method and device for HPLMN identifier provided by the embodiment of the application are used as the SIM card EF _AD When the MNC length indication information of the HPLMN in the file is missing or wrong, PLMN stored in the UE and/or the SIM card can be obtained, then the first two digits of MNC in each PLMN and the first PLMN with the same MCC as the HPLMN are determined, and the effective length of MNC in the HPLMN identifier corresponding to the HPLMN can be accurately determined according to the MNC length of the first PLMN, so that the UE can accurately obtain the HPLMN identifier.

Based on the foregoing embodiments, referring to fig. 4, fig. 4 is a schematic flow chart of a method for correcting the HPLMN identifier according to an embodiment of the present application. In one possible embodiment, the method comprises:

s401, the UE searches each PLMN to be selected corresponding to the current network environment.

In a possible implementation manner, when the UE triggers the network selection procedure, the access layer reports PLMNs found in the current environment, where the PLMNs are candidate PLMNs of the UE.

S402, determining whether MNC length indication information of the HPLMN is valid. If not, execution continues with S403, and if so, execution proceeds with S4010 to S4016.

S403, determining the MNC effective length of the currently determined HPLMN identifier. If the MNC effective length of the currently determined HPLMN identifier is 2 bits, continuing to execute S404; if the MNC effective length of the currently determined HPLMN identification is 3 bits, S409 is performed.

S404, determining whether a second PLMN with the same first two digits of MCC and MNC as the HPLMN exists in each candidate PLMN. If yes, continue to execute S405; if not, S409 is performed.

S405, determining MNC lengths of the second PLMNs. If the MNC length of each second PLMN is 2 bits, executing S409; if there is a second PLMN with MNC length of 3 bits, then execution continues with S406, S407.

S406, determining a second target value of the third position of the MNC in the HPLMN identification according to the IMSI of the SIM card.

S407, determining whether the second target value is the same as the third bit of the MNC of any one of the second PLMNs. If yes, continue to execute S408; if not, S409 is performed.

S408, determining that the effective length of MNC of the HPLMN identifier is 3 bits, and setting the third bit of MNC in the HPLMN identifier as a second target value.

S409, keeping MNC in HPLMN identification unchanged.

S4010, determining the MNC effective length of the currently determined HPLMN identification. If the MNC effective length of the currently determined HPLMN identifier is 2 bits, continuing to execute S4011; if the MNC effective length of the currently determined HPLMN identification is 3 bits, S4016 is performed.

S4011, determining whether there is a third PLMN with the same first two digits of MCC and MNC as the HPLMN in each of the candidate PLMNs. If yes, continue to execute S4012; if not, S4016 is performed.

S4012, determining MNC lengths of the third PLMNs. If the MNC length of each third PLMN is 3 bits, continuing to execute S4013; if there is a third PLMN with MNC length of 2 bits, then S4016 is performed.

S4013, determining a third target value of the MNC in the HPLMN identification according to the IMSI of the SIM card.

S4014, determining whether the third target value is the same as the third bit of the MNC of any third PLMN. If yes, continue to execute S4015; if not, S4016 is performed.

S4015, determining that the effective length of the MNC of the HPLMN identifier is 3 bits, and setting the third bit of the MNC in the HPLMN identifier to the third target value.

S4016, keeping MNC in HPLMN identity unchanged.

According to the HPLMN identification correction method provided by the embodiment of the application, the UE can be arranged on the SIM card EF _AD In a file And under the condition that the MNC length of the HPLMN indicates byte missing or indicates error, the MNC effective length in the HPLMN is automatically corrected, so that the UE can acquire the correct HPLMN, and subsequent function and service errors of the UE are avoided.

Based on the description in the foregoing embodiment, a correction device for HPLMN identification is also provided in the embodiment of the present application. Referring to fig. 5, fig. 5 is a schematic program module first of a HPLMN identification correction apparatus provided in an embodiment of the present application, where the HPLMN identification correction apparatus includes:

the judging module 501 is configured to obtain MNC length indication information of the HPLMN in the SIM card after the UE is powered on, and determine whether the MNC length indication information is valid.

And the searching module 502 is configured to obtain the first two digits and the MCC of the MNC corresponding to the HPLMN when the MNC length indication information is invalid, obtain the memory of the UE and/or the PLMN stored in the SIM card, and determine the first PLMN in which the first two digits and the MCC of the MNC in each PLMN are the same as the HPLMN.

A processing module 503, configured to determine an HPLMN identifier corresponding to the HPLMN according to the MNC length of the first PLMN.

The HPLMN identifier correction method and device provided by the embodiment of the application are used as the SIM card EF _AD When the MNC length indication information of the HPLMN in the file is missing or wrong, the effective length of the MNC in the HPLMN identification can be corrected according to the existing PLMN information, so that the UE can accurately acquire the HPLMN identification.

In one possible implementation, the determining module 501 is specifically configured to:

acquiring EF in SIM card _AD Files, determining the EF _AD The MNC length of the HPLMN in the file indicates whether a byte is missing.

And when the MNC length indication byte is not deleted and the MNC length indicated by the MNC length indication byte is correct, determining that the MNC length indication information is valid.

In one possible implementation, the processing module 503 is specifically configured to:

and when the MNC length of each first PLMN is 2 bits, determining that the MNC effective length of the HPLMN identifier is 2 bits, and setting the third bit of the MNC in the HPLMN identifier to be 0xF.

In a possible embodiment, the processing module 503 is specifically further configured to:

when one part of MNC length of the first PLMN is 2 bits and the other part of MNC length of the first PLMN is 3 bits, determining a first target value of a third bit of MNC in the HPLMN identification according to the IMSI of the SIM card.

And if the first target value is the same as the third bit of the MNC of any one of the first PLMNs, determining that the effective length of the MNC of the HPLMN identifier is 3 bits, and setting the third bit of the MNC in the HPLMN identifier as the first target value.

after the UE searches each PLMN to be selected corresponding to the current network environment, if the MNC length indication information is invalid and the MNC effective length of the HPLMN identifier currently determined is 2 digits, determining whether there is a second PLMN with the same MCC and MNC in the first two digits of each PLMN to be selected and the HPLMN.

And when the second PLMNs exist and the MNC length of each second PLMN is 2 bits, keeping the MNC in the HPLMN identifier unchanged.

after the UE searches each PLMN to be selected corresponding to the current network environment, if the MNC length indication information is valid and the MNC length indication information indicates that the MNC effective length of the HPLMN identifier is 2 digits, determining whether there is a third PLMN with the same MCC and MNC first two digits as the HPLMN in each PLMN to be selected.

When the third PLMNs exist and the effective MNC lengths of the third PLMNs are 3 bits, determining a third target value of the third bits of the MNCs in the HPLMN identification according to the IMSI of the SIM card, if the third target value is the same as the third bits of any one of the MNCs in the third PLMNs, determining that the effective MNC length of the HPLMN identification is 3 bits, and setting the third bits of the MNCs in the HPLMN identification as the third target value.

It should be noted that, in the embodiment of the present application, details of specific execution of the determining module 501, the searching module 502, and the processing module 503 may refer to relevant details in the embodiment shown in fig. 2 to 4, which are not described herein.

Optionally, the correction device of the HPLMN identifier may be a chip or a chip module.

The correction device for HPLMN identification described in the above embodiment includes each module, which may be a software module, or may be a hardware module, or may be a software module partially, or may be a hardware module partially. For example, for each device or product applied to or integrated in a chip, each module included in the device or product may be implemented in hardware such as a circuit, or at least some modules may be implemented in software program, where the software program runs on a processor integrated in the chip, and the remaining (if any) some modules may be implemented in hardware such as a circuit; for each device and product applied to or integrated in the chip module, each module contained in the device and product can be realized in a hardware mode such as a circuit, different modules can be located in the same component (such as a chip and a circuit module) of the chip module or in different components, or at least part of the modules can be realized in a software program, the software program runs in a processor integrated in the chip module, and the rest (if any) of the modules can be realized in a hardware mode such as a circuit; for each device or product applied to or integrated in the terminal, the included modules may all be implemented in hardware such as a circuit, and different modules may be located in the same component (e.g. a chip, a circuit module, etc.) or different components in the terminal, or at least some modules may be implemented in a software program, where the software program runs on a processor integrated in the terminal, and the remaining (if any) some modules may be implemented in hardware such as a circuit.

Further, based on the descriptions in the above embodiments, there is also provided a UE in the embodiments of the present application, where the UE includes at least one processor and a memory; wherein the memory stores computer-executable instructions; the at least one processor executes computer-executable instructions stored in the memory to implement the steps performed by the UE in the above embodiment, which is not described herein.

For a better understanding of the embodiments of the present application, refer to fig. 6, and fig. 6 is a schematic hardware structure of a user equipment according to the embodiments of the present application.

As shown in fig. 6, the user equipment 60 of the present embodiment includes: a processor 601 and a memory 602; wherein:

a memory 602 for storing computer-executable instructions;

the processor 601 is configured to execute computer-executable instructions stored in the memory to implement the steps of the HPLMN identification correction method described in the foregoing embodiments, and specifically reference may be made to the description in the foregoing embodiments, which is not repeated in the embodiments of the present application.

Alternatively, the memory 602 may be separate or integrated with the processor 601.

When the memory 602 is provided separately, the device further comprises a bus 603 for connecting said memory 602 and the processor 601.

Further, based on the foregoing description of the foregoing embodiments, a computer readable storage medium is further provided in the embodiments of the present application, where computer executable instructions are stored in the computer readable storage medium, and when the processor executes the computer executable instructions, each step of the method for correcting the HPLMN identifier described in the foregoing embodiments may be implemented, and specifically reference may be made to the description in the foregoing embodiments, which is not repeated in the embodiments of the present application.

Further, based on the foregoing description of the foregoing embodiments, a computer program product is provided in the embodiments of the present application, where the computer program may implement each step of the HPLMN identification correction method described in the foregoing embodiments when the computer program is executed by a processor, and specific reference may be made to the description in the foregoing embodiments, which is not repeated herein.

In the several embodiments provided in this application, it should be understood that the disclosed apparatus and method may be implemented in other ways. For example, the above-described embodiments of the apparatus are merely illustrative, and for example, the division of the modules is merely a logical function division, and there may be additional divisions when actually implemented, for example, multiple modules may be combined or integrated into another system, or some features may be omitted or not performed. Alternatively, the coupling or direct coupling or communication connection shown or discussed with each other may be an indirect coupling or communication connection via some interfaces, devices or modules, which may be in electrical, mechanical, or other forms.

The modules described as separate components may or may not be physically separate, and components shown as modules may or may not be physical units, may be located in one place, or may be distributed over multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

In addition, each functional module in each embodiment of the present application may be integrated in one processing unit, or each module may exist alone physically, or two or more modules may be integrated in one unit. The integrated units of the modules can be realized in a form of hardware or a form of hardware and software functional units.

The integrated modules, which are implemented in the form of software functional modules, may be stored in a computer readable storage medium. The software functional module is stored in a storage medium, and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) or a processor (english: processor) to perform some of the steps of the methods described in the embodiments of the present application.

It should be understood that the above processor may be a central processing unit (english: central Processing Unit, abbreviated as CPU), or may be other general purpose processors, digital signal processors (english: digital Signal Processor, abbreviated as DSP), application specific integrated circuits (english: application Specific Integrated Circuit, abbreviated as ASIC), or the like. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like. The steps of a method disclosed in connection with the present application may be embodied directly in a hardware processor for execution, or in a combination of hardware and software modules in a processor for execution.

The memory may comprise a high-speed RAM memory, and may further comprise a non-volatile memory NVM, such as at least one magnetic disk memory, and may also be a U-disk, a removable hard disk, a read-only memory, a magnetic disk or optical disk, etc.

The bus may be an industry standard architecture (Industry Standard Architecture, ISA) bus, an external device interconnect (Peripheral Component, PCI) bus, or an extended industry standard architecture (Extended Industry Standard Architecture, EISA) bus, among others. The buses may be divided into address buses, data buses, control buses, etc. For ease of illustration, the buses in the drawings of the present application are not limited to only one bus or one type of bus.

The storage medium may be implemented by any type or combination of volatile or nonvolatile memory devices such as Static Random Access Memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic or optical disk. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.

An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor. The processor and the storage medium may reside in an application specific integrated circuit (Application Specific Integrated Circuits, ASIC for short). It is also possible that the processor and the storage medium reside as discrete components in an electronic device or a master device.

Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the method embodiments described above may be performed by hardware associated with program instructions. The foregoing program may be stored in a computer readable storage medium. The program, when executed, performs steps including the method embodiments described above; and the aforementioned storage medium includes: various media that can store program code, such as ROM, RAM, magnetic or optical disks.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for modifying an identity of a home public land mobile network, the method comprising:

after the User Equipment (UE) is started, acquiring Mobile Network Code (MNC) length indication information of a Home Public Land Mobile Network (HPLMN) in a Subscriber Identity Module (SIM) card, and determining whether the MNC length indication information is valid or not;

when the MNC length indication information is invalid, acquiring the first two digits of MNC corresponding to the HPLMN and a mobile country code MCC, acquiring a public land mobile network PLMN stored in a memory of the UE and/or the SIM card, and determining the first PLMN with the same MNC and MCC in each PLMN as the HPLMN;

2. The method of claim 1, wherein the obtaining MNC length indication information of the HPLMN in the SIM card and determining whether the MNC length indication information is valid comprises:

3. The method according to claim 1 or 2, wherein the determining the HPLMN identity corresponding to the HPLMN according to the MNC length of the first PLMN comprises:

and when the MNC length of each first PLMN is 3 digits, determining that the MNC effective length of the HPLMN identifier is 3 digits, and determining the value of the third digit of the MNC in the HPLMN identifier according to the International Mobile Subscriber Identity (IMSI) of the SIM card.

4. The method according to claim 1 or 2, wherein the determining the HPLMN identity corresponding to the HPLMN according to the MNC length of the first PLMN comprises:

5. The method according to claim 1 or 2, characterized in that after said obtaining the respective PLMNs stored in the UE and/or the SIM card, it further comprises:

6. The method according to claim 1 or 2, wherein after said determining the HPLMN identity to which the HPLMN corresponds, further comprising:

7. The method of claim 6, wherein after determining the HPLMN identification corresponding to the HPLMN, further comprising:

8. A correction device for home public land mobile network identity, said device comprising:

the judging module is used for acquiring the MNC length indication information of the Home Public Land Mobile Network (HPLMN) in the SIM card after the User Equipment (UE) is started, and determining whether the MNC length indication information is valid or not;

The searching module is used for acquiring the first two digits of MNC corresponding to the HPLMN and the mobile country code MCC when the MNC length indication information is invalid, acquiring the public land mobile network PLMN stored in the memory of the UE and/or the SIM card, and determining the first PLMN with the same MNC and MCC as the HPLMN in each PLMN;

9. A user device, comprising: at least one processor and memory;

the memory stores computer-executable instructions;

the at least one processor executing computer-executable instructions stored in the memory causes the at least one processor to perform the home public land mobile network identification correction method of any one of claims 1 to 7.

10. A computer readable storage medium having stored therein computer executable instructions which, when executed by a processor, implement a method of modifying home public land mobile network identity as claimed in any one of claims 1 to 7.

11. A computer program product comprising a computer program which, when executed by a processor, implements the method of modifying home public land mobile network identity of any one of claims 1 to 7.