CN1787681A - Method for switching international movable user sign - Google Patents

Abstract

The invention discloses a method for switching international mobile subscriber identities. Firstly, the information of different international mobile subscriber identities are respectively recorded in the universal subscriber identification module. The different international mobile subscriber identities include basic international mobile subscriber identities and subsidiary international mobile subscriber identities. Mobile subscriber identity; then judge whether it is necessary to switch the international mobile subscriber identity according to the interaction information between the terminal equipment and the universal subscriber identity module; finally switch according to the information of different international mobile subscriber identity recorded in the universal subscriber identity module. The present invention saves the IMSI number segment information that needs to be switched and the spare IMSI number segment information in the universal subscriber identification module USIM, and the mobile operator customizes the IMSI automatic switching through the controllable USIM, and realizes the flexible coordination between multiple MNCs , which improves the user experience.

Description

A method for switching international mobile subscriber identity

technical field

The invention relates to a mobile communication network, in particular to a switching technology of an international mobile user ID when a mobile terminal roams internationally.

Background technique

In the current mobile communication network, the mobile network of the mobile operator is called PLMN (Public Land Mobile Network, public land mobile network), and the current types of PLMN are divided into CDMA, GSM and so on. IMSI (International Mobile Subscriber Identity, International Mobile Subscriber Identity) is a number that identifies mobile users in different PLMNs, including MCC (Mobile Country Code, mobile country code), MNC (Mobile Network Code, mobile network code) and mobile subscriber identification code , For example, the country code of China Mobile is 460, and the mobile network code of Great Wall Network and China Unicom is 03. The IMSI-related information is stored in the IMSI-related files of the USIM (Universal Subscriber Identity Module, Universal Subscriber Identity Module). When a single MNC cannot meet the service requirements due to the increase in the number of mobile operator users, a new MNC needs to be activated, that is, a new IMSI number segment needs to be added.

As mentioned above, different PLMN networks have different IMSI number ranges. When the user uses the newly added IMSI number range within the country, since the Internet roaming agreement has been signed between each PLMN, the user of the newly added IMSI number range is allowed to use the network roaming. However, when the user roams internationally, if the newly added IMSI number segment has not signed an international network roaming agreement with other international networks, the user needs to temporarily abandon the use of the current IMSI number segment and switch to other PLMN networks that have signed an international roaming agreement IMSI number segment. The following takes GSM network and WCDMA network as examples to illustrate the current switching method for IMSI:

GSM network and WCDMA network have different IMSI number segments. At present, the PLMN type used in most countries is GSM, and GSM network operators in various countries have signed PLMN roaming permission agreements, while for WCDMA networks, mobile operators have not yet signed new agreements with other GSM mobile operators in the world. PLMNID Roaming Allowed Agreement. However, because signing a new roaming agreement will result in a waste of cost and time, when WCDMA users roam to other GSM countries, they will not be able to continue to use the original IMSI number segment, and need to choose the IMSI of the GSM network that has signed the roaming agreement . The current method for switching IMSI numbers is that the user manually replaces the original WCDMA IMSI with the GSM IMSI; similarly, when the roaming user returns to his home country, he still needs to manually switch back to the WCDMA IMSI.

From this, it can be seen that because the current IMSI switching method is implemented by the user manually switching, it brings inconvenience to the user.

Contents of the invention

The technical problem to be solved by the present invention is to provide a method for switching international mobile subscriber identities, which can realize automatic switching of international mobile subscriber identities.

In order to solve the above-mentioned technical problems, the present invention provides a method for switching international mobile subscriber identities, which is characterized in that it comprises steps:

1) Recording the information of different international mobile subscriber identities respectively in the universal subscriber identification module, said different international mobile subscriber identities including basic international mobile subscriber identities and auxiliary international mobile subscriber identities;

2) judging whether it is necessary to switch the International Mobile Subscriber Identity according to the interactive information between the terminal equipment and the Universal Subscriber Identity Module;

3) Switching is performed according to the information of different international mobile subscriber identities recorded in the universal subscriber identity module.

Wherein, step 2) and step 3) also include steps between:

A) Replace the current IMSI information stored in the IMSI file of the USI module with the IMSI information recorded in the USI module.

Wherein, the switching process described in step 3) is specifically:

31) Initiate hot reset information to the terminal;

32) Obtain the information of the international mobile subscriber identity from the international subscriber identity file, and perform international mobile subscriber identity switching.

Wherein, the replacement specific process described in step A) is:

If the current IMSI is a basic IMSI, then replace it with the information of the affiliated IMSI recorded in the Universal Subscriber Identity Module;

If the current IMSI is an affiliated IMSI, it is replaced with the information of the basic IMSI recorded in the universal subscriber identity module.

Wherein, the record in step 1) is a permanent record.

Wherein, the interaction information includes mobile country code, mobile network code and location area code.

Wherein, the specific process of judging in 2) is: if the interaction information is different from the information in the international subscriber identity file of the universal subscriber identity module, it is judged that it is necessary to switch the international mobile subscriber identity.

Wherein, the step A) further includes: deleting the current temporary network information in the UIM.

Wherein, when the different IMSIs described in step 1) are more than two, said step A) further includes: presetting the priority level of said affiliated IMSI; the specific replacement process is:

If the current IMSI is a basic IMSI, replace it according to the priority level of the subsidiary IMSI;

If the current International Mobile Subscriber Identity is an affiliated International Mobile Subscriber Identity, use the communication

Replace with the basic International Mobile Subscriber Identity information recorded in the Subscriber Identity Module.

Compared with the prior art, the beneficial effect of the present invention is: the present invention has preserved the IMSI number segment information that needs to be switched and the standby IMSI number segment information in the USIM (Universal Subscriber Identity Module, the universal Subscriber Identity Module). Through the controllable USIM customized IMSI automatic switching, the flexible cooperation between multiple MNCs is realized, and the user's service experience is improved.

In addition, the means of storing the basic IMSI number segment information and the attached IMSI number segment information in the present invention is realized by using the STK (SIM Development Tools Kit, SIM card development tool kit) provided for the user's secondary development in the USIM. Moreover, in order to make the IMSI switching process a two-way switching process, the present invention permanently stores the basic IMSI and the auxiliary IMSI respectively during storage, so that the corresponding IMSI information can be found when switching back to the original IMSI.

Further, in order to enable the terminal to directly locate new IMSI-related information after hot reset, the present invention deletes the temporary network information originally stored in the USIM during switching.

Description of drawings

Fig. 1 is a flowchart of a specific embodiment of the present invention.

Detailed ways

In the current mobile communication network, the mobile network of the mobile operator is called PLMN. PLMN network structure is very complex, it includes switching system, base station subsystem and mobile terminal. Mobile subscribers can make continuous calls with local telephone network subscribers, integrated service digital network subscribers and other mobile subscribers, so they must have multiple identification numbers. Common identification numbers include:

The mobile country code MCC is used in the International Mobile Subscriber Identity IMSI and in the LAI (Location areaIdentity, location area identification mark), indicating the country to which the PLMN belongs;

The mobile network code MNC is used to uniquely represent a specific PLMN network in a certain country (determined by the MCC). The mobile network code is used in the International Mobile Subscriber Identity IMSI and Location Area Identity LAI. If there is more than one public land mobile network PLMN in a country, each network must have a different MNC.

Location area identification LAI, location area identification is periodically sent in the system message broadcast by each cell, and the terminal uses the received information as one of the important basis for network selection;

The IMSI of the mobile station. When a mobile station logs in on the network or applies for a certain service, the mobile station must report the IMSI to the network. The network judges whether the user is an international roaming user according to the mobile country code MCC in the IMSI. The MNC, MCC and other relevant information in the IMSI are stored in the IMSI-related files of the USIM (Universal Subscriber Identity Module, Universal Subscriber Identity Module).

When a single MNC cannot meet the service requirements due to the increase in the number of mobile operator users, a new MNC needs to be activated, that is, a new IMSI number segment needs to be added. As mentioned above, different PLMN networks have different IMSI number ranges. When the user uses the newly added IMSI number range within the country, since the Internet roaming agreement has been signed between each PLMN, the user of the newly added IMSI number range is allowed to use the network roaming. However, when the user roams internationally, if the newly added IMSI number segment has not signed an international network roaming agreement with other international networks, the user needs to temporarily abandon the use of the current IMSI number segment and switch to other PLMN networks that have signed an international roaming agreement IMSI number segment.

The present invention provides a method for automatically switching IMSI through USIM, the core of which is to carry out the secondary development of the STK function module for the user in the USIM, respectively carry out the IMSI number segment information to be switched and the spare IMSI number segment information Store, and then use the USIM operating system to realize the automatic customization of the IMSI.

When using the present invention, the information of the international mobile subscriber identity to be handed over and the alternative international mobile subscriber identity IMSI information are firstly recorded in the secondary development software toolkit of the USIM in the universal subscriber identity module. Subscriber identities include basic international mobile subscriber identities and supplementary international mobile subscriber identities;

Then judge whether to switch the international mobile subscriber identity according to the interaction information between the terminal equipment and the universal subscriber identity module; in the current universal subscriber identity module USIM, the basic IMSI information is usually pre-stored in the EF _IMSI file, The specific information includes MCC information and MNC information. Therefore, it can be judged whether it is necessary to switch the current international mobile subscriber identity according to the current relevant network information searched in the interactive information between the terminal device and the universal subscriber identification module. The specific judgment method is the same as the current one. There are the same technologies, which will be introduced in the specific embodiments of the present invention below;

If necessary, switch according to the information of different international mobile subscriber identities IMSI recorded in the universal subscriber identity module, the specific switching process is:

First, replace the information of the current international mobile subscriber identity stored in the international subscriber identity file EF _IMSI of the universal subscriber identity module with the information of the international mobile subscriber identity recorded in the USIM;

Then, send a hot reset message to the terminal, and another method of generating the hot reset message is to simulate a manual selection of the IMSI command;

Next, the information of the international mobile subscriber identity is obtained from the file, and the international mobile subscriber identity is switched.

In addition, the present invention is applicable to two-way switching, that is, it is suitable for the switching process from the basic IMSI to the subsidiary IMSI, and is also suitable for switching the subsidiary IMSI back to the basic IMSI. The replacement process is specifically:

If the current International Mobile Subscriber Identity is a basic International Mobile Subscriber Identity, replace it with the information of the affiliated International Mobile Subscriber Identity recorded in the USIM;

If the current international mobile subscriber identity is a basic international mobile subscriber identity, replace it with the information of the basic international mobile subscriber identity recorded in the USIM.

Further, in order to enable the terminal to directly locate the new network information in the IMSI file in the USIM after restarting, instead of searching for all available information in the current network and trying one by one, the present invention deletes the information in the universal subscriber identity module when replacing. current temporary network information for .

The present invention is developed to solve the problem of inconvenient use for users caused by not signing an international roaming agreement with other network operators in the world due to newly added IMSI number segments. The following is a specific embodiment of the present invention. In this embodiment, the mobile operator provides users with double IMSI numbers. The so-called double IMSI numbers refer to a mobile user having two IMSI numbers at the same time, and one of the IMSI numbers is originally allowed. A number that roams to another mobile operator's mobile network, and the other is a newly added IMSI number. A typical application of this embodiment is the WCDMA network currently used in China.

GSM network and WCDMA network have different IMSI number segments. At present, the PLMN type used in most countries is GSM, and GSM network operators in various countries have signed PLMN roaming permission agreements, while for WCDMA networks, mobile operators have not yet signed new agreements with other GSM mobile operators in the world. PLMNID Roaming Allowed Agreement. The solution of the present invention is: the mobile operator creates two files in the secondary development STK function module in the USIM of WCDMA, and stores the information of the two IMSI number segments into the two files respectively, in order to ensure that the user is roamed by After the country returns to the home country, the IMSI information of the original home network can be found, so as to switch back to the IMSI number segment of the home network. The designer stores the information of the two IMSI number segments permanently.

The present invention makes full use of the interaction information between the mobile phone terminal equipment and the USIM to judge whether it is necessary to switch the IMSI at present. The time interval between the mobile terminal and the USIM is generally about 30ms. The message will contain the MCC information and MNC information necessary for whether the terminal enters the PLMN of another country. The USIM operating system can use the MCC information, MNC information obtained in the current network Information such as information determines whether the user needs to perform IMSI handover at this time.

FIG. 1 is a specific flowchart of the application of the present invention in this embodiment.

As shown in the figure, after the user roams internationally, when the handshake timer for controlling the interaction information between the mobile terminal device and the USIM reaches the time, the mobile terminal device will perform information interaction with the USIM (step 1);

The USIM operating system obtains related information such as MCC in the current PLMN network interaction information (step 2); then judges whether the obtained information is related to the IMSI related file originally stored in the USIM (as stipulated in the 3GPP agreement, the related information of the IMSI is stored in the EF _IMSI The original information in the file) is consistent (step 3). If inconsistent, it means that another IMSI number segment needs to be enabled at this time, and then the USIM further judges whether it meets the IMSI switching condition, such as whether the user is in an idle state at this time (step 4);

When the above conditions are met, USIM will start IMSI handover. The specific process is as follows: the USIM first copies the relevant information of another IMSI number range pre-saved in the USIM file to the EF _IMSI file of the USIM, and overwrites the original IMSI number range information in the original EF _IMSI file (step 5 ); In order to enable the terminal to directly locate the new IMSI-related information after the hot start, the present invention deletes the temporary information stored in the original EF _IMSI file.

Since the terminal will search for IMSI information when starting up, in order to allow the terminal to reselect the IMSI information in the modified EF _IMSI file, next, the USIM initiates a warmrest command to the mobile terminal (step 6);

The terminal re-registers with the PLMN according to the new IMSI number segment information in the EF _IMSI file, so as to achieve dual IMSI automatic replacement roaming (step 7);

When the user returns from roaming with other operators, the USIM judges that IMSI switching is required according to the above steps. When reselecting the original IMSI number segment, the USIM will repeat the above steps 1 to 7 to switch back to the original IMSI.

The above describes that the present invention solves the problem of IMSI number segment switching when WCDMA users roam. The present invention is not limited to the situation of roaming in the international network, nor is it limited to the situation of storing double IMSI number segments in the USIM. With the continuous development of network technology, it should be foreseen that in the future network, when there are multiple IMSI number ranges available for the PLMN network, multiple IMSI files can be pre-stored in the STK in the USIM, and at the same time set Set a certain IMSI candidate priority or a predetermined candidate rule, and replace the information in the original IMSI storage file of the USIM with the candidate IMSI number segment information when IMSI switching is required.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be It is regarded as the protection scope of the present invention.

Claims (9)

1, a kind of method of switching international movable user sign is characterized in that, comprises step:

1) in USIM the information of different IMSI International Mobile Subscriber Identity is carried out record respectively, described different IMSI International Mobile Subscriber Identity comprise basic IMSI International Mobile Subscriber Identity and attached IMSI International Mobile Subscriber Identity;

2) judge whether the needs switching international movable user sign according to the interactive information between terminal equipment and the USIM;

3) switch according to the information of the different IMSI International Mobile Subscriber Identity that writes down in the USIM.

2, the method for switching international movable user sign according to claim 1 is characterized in that, described step 2) and step 3) between also comprise step:

A) replace the information of the current IMSI International Mobile Subscriber Identity of storing in the international subscriber identity file of USIM with the information of the IMSI International Mobile Subscriber Identity of record in the described USIM.

3, the method for switching international movable user sign according to claim 2 is characterized in that, the described handoff procedure of step 3) is specially:

31) initiate hot reset information to terminal;

32) from described international subscriber identity file, obtain the information of described IMSI International Mobile Subscriber Identity, carry out IMSI International Mobile Subscriber Identity and switch.

4, the method for switching international movable user sign according to claim 2 is characterized in that: steps A) described replacement detailed process is:

If described current IMSI International Mobile Subscriber Identity is basic IMSI International Mobile Subscriber Identity, then replace with the information of the attached IMSI International Mobile Subscriber Identity of record in the described USIM;

If described current IMSI International Mobile Subscriber Identity is attached IMSI International Mobile Subscriber Identity, then replace with the information of the basic IMSI International Mobile Subscriber Identity of record in the described USIM.

5, according to the method for any one described switching international movable user sign in the claim 1 to 4, it is characterized in that: the described permanent recording that is recorded as of step 1).

6, the method for switching international movable user sign according to claim 5 is characterized in that: described interactive information comprises mobile national coding, mobile network's coding and location area code.

7, the method for switching international movable user sign according to claim 6, it is characterized in that: described 2) described judgement detailed process is: if the information in the international subscriber identity file of described interactive information and described USIM is not simultaneously, then being judged as needs switching international movable user sign.

8, according to the method for claim 2 or 3 or 4 described switching international movable user signs, it is characterized in that: described steps A) also comprise: delete the current casual network information in the described USIM.

9, the method for switching international movable user sign according to claim 2, it is characterized in that: when the described different IMSI International Mobile Subscriber Identity of step 1) during greater than two, described steps A) also comprise: the priority level that preestablishes described attached IMSI International Mobile Subscriber Identity; Described replacement detailed process is:

If described current IMSI International Mobile Subscriber Identity is basic IMSI International Mobile Subscriber Identity, then replace according to the priority level of described attached IMSI International Mobile Subscriber Identity;

If described current IMSI International Mobile Subscriber Identity is attached IMSI International Mobile Subscriber Identity, then replace with the information of the basic IMSI International Mobile Subscriber Identity of record in the described USIM.

Images