KR101513925B1 - System and Method for registering location of roaming phone - Google Patents

Abstract

The present invention provides a home network system for location registration of a roaming terminal that has moved to a visited network, the home network system comprising: a home network system for determining whether the visited network is a pre-designated provider network when a location registration request message of a roaming terminal is received from the visited network; A GLR requesting a location registration for an SMS incoming call to the home location register when the location registration is completed and requesting the roaming provider change message transmission to the visited network when the location registration is completed; And a home location register for performing location registration for SMS reception to the roaming terminal when requested by the roaming user. The roaming user can select a specific provider network and receive a roaming service through the provider network, You can use a rate plan.

Roaming, visiting network, home network, location registration

Description

Field of the Invention [0001] The present invention relates to a system and method for registering a location of an overseas roaming mobile terminal,

The present invention relates to a system and method for location registration of an overseas roaming mobile terminal. More particularly, the present invention relates to a system and method for location registration of a foreign roaming mobile terminal, A location of an overseas roaming mobile terminal that performs location registration only for an SMS incoming call and transmits a message for changing the roaming provider network to the roaming terminal and performs location registration through a provider network selected by the user, To a system and method for registration.

With the recent rapid increase in mobile communication demand, global roaming service to the global market has been provided and the number of subscribers is steadily increasing.

In general, when moving from a home network of a plurality of networks operated by different providers to a visitor network, the visited network obtains the location information of the mobile terminal from the home network, and based on the acquired information And provides a roaming service that enables a call service to the corresponding terminal.

After authentication or location registration of the terminal moved to the visited network, call processing is performed by exchanging ISUP (Integrated Services Digital Network (ISDN) User Part) message with the exchange of the home network through the domestic / foreign gateway.

If roaming service is provided, it induces roaming from a home network to a mobile communication network of a cooperating provider, or excludes roaming to a mobile communication network of a carrier having a low call success rate and low quality, and induces roaming to a carrier having a high call success rate. do.

However, in the conventional method as described above, when the location registration is repeatedly attempted in a non-preferred visiting network, location registration is finally performed and roaming is allowed through a non-preferred visiting network.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a system and method for location registration of an overseas roaming mobile terminal in which roaming is performed through a mobile communication network of a preferred carrier in providing roaming service.

It is another object of the present invention to provide a system and method for location registration of an overseas roaming mobile terminal, which allows a user to register a preferred carrier network and select the carrier network.

It is another object of the present invention to provide a system and method for location registration of an overseas roaming mobile terminal, which enables a user to automatically select a preferred operator network in a terminal when a domestic mobile communication subscriber roams abroad .

According to an aspect of the present invention, there is provided a home network system for location registration of a roaming terminal which has moved to a visited network, the home network system comprising: If it is determined that the network is not a predetermined operator network, the home location register requests the location registration for SMS reception with the home location register. If the location registration is completed, the roaming provider change request message is transmitted to the visited network GLR, and a home location register for performing location registration for an SMS call to the roaming terminal when location registration for SMS reception is requested from the GLR, is provided for a location registration of an overseas roaming mobile terminal .

The GLR determines whether it is a pre-designated provider network by using the correspondence between the visited exchange information included in the location registration request message and the pre-stored provider network identification information.

Also, the GLR requests location registration to the home location register if the visited network is a pre-designated provider network.

In addition, the GLR may cause a location registration rejection message to be transmitted to the roaming terminal through the visited network if the visited network is not a predetermined operator network, and when the location registration through the predetermined operator network of the roaming terminal fails, The home location register requests location registration for SMS incoming.

Upon receiving the location registration rejection message through the GLR, the roaming terminal retries the location registration through the designated carrier network for a predetermined number of times.

The visiting network that is requested to transmit the roaming provider change message from the GLR generates a roaming provider change message and transmits the roaming provider change message to the roaming terminal.

Here, the roaming service provider change message indicates a method of selecting another provider network in SMS form.

When the roaming provider change message is received, the roaming terminal requests location registration through the provider network selected by the user according to the method included in the message.

According to another aspect of the present invention, there is provided a mobile communication system including a visited network determiner for determining whether a visited network is a predetermined operator network when a location registration request message of a roaming terminal is received from a visited network, A location registration controller for controlling location registration of the roaming terminal by determining whether or not to register a location for the SMS reception, and a roaming service provider for transmitting a roaming provider change message to the roaming terminal when performing location registration for SMS reception in the location registration controller, There is provided a roaming gateway apparatus for location registration of an overseas roaming mobile terminal including a change request unit.

The visited network determining unit determines whether the network is a predetermined network by using the correspondence between the visited network exchanger identification information included in the location registration request message and the pre-stored network identification information of the preferred network.

If it is determined that the visited network is not a designated network, the location registration controller requests the location registration for the SMS reception with the home location register, request.

In addition, if the visited network is not a designated network, the location registration control unit may transmit a location registration rejection message to the roaming terminal through the visited network as a result of the determination of the visited network determination unit, The home location register requests location registration for SMS reception.

According to another aspect of the present invention, there is provided a mobile terminal capable of changing a roaming service provider network with a user interface unit, the mobile terminal comprising: a location registration request unit for requesting location registration to a home location register of a home network, And a roaming provider network change setting unit for changing the current provider network to the provider network selected by the user through the user interface unit when the roaming provider change message is received from the visited network through the home network.

The location registration request unit requests location registration to the home location register of the home network through the changed service provider network in the roaming provider network change setting unit.

In addition, when the location registration request message is received, the location registration request unit retries the location registration through another service provider network, and if the location registration fails, the location registration request unit requests location registration through the existing service provider network and registers the location for SMS reception.

According to another aspect of the present invention, there is provided a method for registering a roaming terminal that has moved to a visited network in a home network system, the method comprising: (a) when a location registration request message of a roaming terminal is received from the visited network, Determining whether the mobile communication network is a pre-designated carrier network and requesting a location registration for SMS reception with a home location register if the mobile communication network is not a predetermined carrier network; (b) (C) transmitting an SMS receiving location registration completion message from the GLR to an exchange of the visited network by performing location registration for only an incoming call and transmitting an SMS receiving location registration completion message to the GLR; (D) transmitting, by the exchange of the visited network, a roaming provider change message to the roaming terminal; (e) The terminal changes the visited network to the service network selected by the user according to the roaming provider change message and requests the location registration with the GLR; and (f) the GLR requests location registration with the home location register, And registering the location of the roaming terminal in a register of the foreign roaming mobile terminal.

Wherein the step (a) comprises the steps of: determining whether the visited network is a pre-designated provider network when the location registration request message of the roaming terminal is received from the visited network; Transmitting the location registration request message to the roaming terminal through the visited network; and requesting location registration for the SMS reception to the home location register when the location registration through the predetermined business network of the roaming terminal fails.

Wherein the step (f) comprises the steps of: requesting the GLR to perform location registration with the home location register, registering the location of the roaming terminal according to the location registration request, and transmitting a location registration completion message to the GLR , And informing the GLR of the location registration completion to the provider network.

According to another aspect of the present invention, there is provided a method for location registration of a roaming terminal that has moved to a visited network, the method comprising the steps of: (a) when a location registration request message of a roaming terminal is received from the visited network, And if it is determined that the network is not a predetermined network, requesting location registration for SMS reception with a home location register, (b) receiving an SMS reception location registration completion message from the home location register, A step of requesting transmission of a roaming provider change message after transmitting an SMS receiving location registration completion message to the exchange of the visited network, (c) Requesting location registration to the home location register, and transmitting the location registration request to the home location register, And registering the location of the horse on the basis of the location information of the foreign roaming mobile terminal.

Wherein the step (a) comprises the steps of: determining whether the visited network is a predetermined operator network when the location registration request message of the roaming terminal is received from the visited network; if the visited network is not a predetermined operator network, To the roaming terminal through the visited network, and requesting location registration for SMS reception to the home location register when the roaming terminal fails to register the location through the predetermined business network.

According to another aspect of the present invention, there is provided a method for location registration in a home network system, the method comprising: requesting location registration to a GLR of a home network through a visited network; When a location registration rejection message is received, attempting to register a location through a pre-designated provider network, if location registration via a predetermined network is unsuccessful, requesting location registration through the visited network, Changing the visited network to the service provider network selected by the user and requesting the location registration when the roaming provider change message is received, is provided.

As described above, according to the present invention, it is possible to provide a system and method for location registration of an overseas roaming mobile terminal in which roaming can be performed through a mobile communication network of a preferred carrier of a roaming terminal user.

Also, it is possible to provide a system and method for location registration of an overseas roaming mobile terminal in which a user himself can register a preferred carrier network and select the carrier network.

In addition, since a roaming user can select a specific provider network and receive a roaming service through the provider network, it is possible to provide a system and method for location registration of an overseas roaming mobile terminal that can use a service provided by the provider have.

The foregoing and other objects, features, and advantages of the present invention will become more apparent from the following detailed description taken in conjunction with the accompanying drawings, in which: FIG.

1 is a diagram illustrating a system for location registration of an overseas roaming mobile terminal according to the present invention.

Referring to FIG. 1, a mobile terminal 100 receiving a roaming service through a mobile communication system in another country transmits a visiting network among a plurality of visited networks 110a and 110b provided by different mobile communication providers of the visited country You can choose to request roaming.

The start of the roaming service is started by the mobile terminal 100 selecting a visited network and requesting the location registration. The location registration request is transmitted to the exchanges 114a and 114b through the base stations 112a and 112b of the visited networks 110a and 110b and the exchanges 114a and 114b transmit the location registration request to the terminal 100, The home network 150 identifies the home network 150 and transmits a home location register (HLR) of the home network 150 through a roaming gateway device (GLR) And transmits a result (success or failure) message to the visited network 110a or 110b after the location registration process is performed in the location register 180, The exchanges 114a and 114b of the mobile terminals 110a and 110b transmit the result message to the roaming terminal 100. [

The location registration procedure described above is somewhat different depending on the type of mobile communication system, and the types of messages used are somewhat different, but it is generally well known.

After the location registration, the roaming terminal 100 exchanges ISUP (ISDN User Part) messages with the exchanger 170 of the home network 150 through the roaming call relay system 130 to perform call processing.

The roaming call relay system 130 may include a home network 150 and a home network 150 for relaying roaming calls between the exchanges 114a and 114b of the visited networks 110a and 110b or the GLR 160 of the home network 150 0.0 > 110 < / RTI >

The roaming call relay system 130 determines the home network 150 based on the IMSI assigned to the roaming terminal 100. The IMSI is a globally unique 15-digit number assigned to a mobile communication terminal (or a smart card) at the time of subscription to a mobile communication service, and includes a mobile country code (MCC), a mobile network code (MNC) .

The visited network 110 includes a base station 112, an exchange 114, a home location register (HLR) (not shown) in which subscriber information including subscriber location information and supplementary service information is registered do.

The visited network 110 may also include a GLR (not shown) that transmits the global roaming call to the roaming call relay system 130.

The description of the constituent elements of the visited network 110 is general, and a description thereof will be omitted.

The preferred carrier network information is registered in the roaming terminal 100, and the location registration is requested to the home network 150 through the preferred carrier network when requesting the location registration. Hereinafter, the preferred carrier network will be referred to as a first visited network 110a.

The home network 150 includes a base station 190, an exchange 170, a home location register (HLR) 180, and a GLR 160 relaying global roaming calls.

The base station 190 performs radio signal transmission and reception, radio channel coding and decoding, signal strength and quality measurement, baseband signal processing, diversity, radio resource management, and self-maintenance.

The home location register 180 stores and manages subscriber information, additional service information per subscriber, and location information of the mobile terminal. In particular, the home location register 180 stores profile information of the mobile terminal 100. This profile information includes a subscriber's telephone number (MSISDN), IMSI, subscription-added service information, and the like.

When the call connection request message is received from the GLR 160, the switching center 170 paging the called terminal and establishes a call connection with the roaming terminal 100.

The GLR 160 relays the global roaming call in the home network 150 and the visited network 110. For example, when a subscriber of the home network 150 moves to the visited network 110 and makes a call to another subscriber located in the home network 150, the outgoing call is transmitted to the home network 150 via the GLR (not shown) The GLR 160 of the home network 150 transmits the delivered outgoing call to the called party through the switch 170 of the home network 150. [

When the location registration request message of the roaming terminal 100 is received from the visited network 110, the GLR 160 determines whether the visited network 110 is a pre-designated provider network. If it is not a network, it requests location registration for SMS reception to the home location register 180 and requests roaming provider change message transmission to the visited network 110b when the location registration is completed. The location registration request message includes the visited network switch identification information and the roaming terminal identification information.

The GLR 160 also transmits a location registration rejection message to the roaming terminal 100 through the visited network 110b if the visited network is not a designated network, The location registration is retried through the pre-designated provider network 110a. In this case, when the location registration of the roaming terminal 100 to the previously designated provider network 110a fails, the GLR 160 requests the home location register 180 for location registration for SMS reception only, (180) to perform location registration for the SMS incoming call only to the roaming terminal (100).

That is, when the location registration is requested through the predetermined specific provider network 110a, the GLR 160 allows the location registration of the roaming terminal 100 to be performed in the home location register 180, When the location registration is requested via the other service provider network 110b, the location registration rejection message indicating that the location registration of the roaming terminal 100 is impossible is provided to the roaming terminal 100, And causes the location registration to be performed through the specific provider network 110a.

However, since the terminal 100 receiving the location registration rejection message and the foreign mobile communication service provider network may not operate normally differently from the standard, it may not be possible to change to the predetermined service provider network. To prevent this, To send the method of manually selecting another carrier network together with the SMS so that the user can set up the carrier network himself.

The base station described above may be named differently for each generation, for example, a base transceiver station (BTS) in a second-generation network and a node B in a third-generation network, and the exchange may be named MSC, SGSN, Each generation can be named differently.

2 is a block diagram schematically showing a configuration of a roaming gateway apparatus according to the present invention.

2, the roaming gateway device 160 includes a visiting network determining unit 162 for determining whether the visited network is a designated network when the location registration request message of the roaming terminal is received from the visited network, A location registration controller 164 for determining whether or not to register a location for SMS reception according to the determination result of the determination unit 162 and controlling location registration of the roaming terminal, A roaming provider change requesting unit 166 for causing a roaming service provider change message to be transmitted to the roaming terminal.

The visited network determining unit 162 determines whether the visited network that requested the location registration using the correspondence between the visited exchange exchanger identification information included in the location registration request message from the roaming terminal and the pre- .

As a result of the determination made by the visited network determiner 162, the location registration controller 164 requests location registration for SMS reception only to the home location register if it is not a designated carrier network, Request location registration for call processing. Upon receiving a request for location registration for the SMS incoming only, the home location register 160 performs location registration for SMS reception only and transmits an SMS reception location registration completion message at the request of the location registration control unit 164.

If the visiting network determining unit 162 determines that the visited network is not a designated network, the location registration control unit 164 transmits a location registration rejection message to the roaming terminal through the visited network. When the location registration attempt through the pre-designated provider network of the roaming terminal fails for a predetermined number of times, the location registration controller 164 determines that the location registration has been attempted, Requests the location registration for the SMS incoming only with the home location register.

That is, when the location registration is requested through another provider network other than the designated carrier network, the location registration control unit 164 transmits a location registration rejection message indicating that the location registration is not allowed and roaming is impossible to the roaming terminal, And to select a carrier network.

In this case, since the roaming terminal and the foreign mobile communication provider network, which received the message that roaming is impossible, may not operate normally differently from the standard, it is impossible to change to the specific business network. To prevent this, the roaming provider change request unit 166 Transmits a method of manually selecting a third party network to the user of the roaming terminal through SMS so that the user can set up the roaming provider network by himself / herself.

3 is a block diagram schematically illustrating a configuration of a mobile terminal capable of changing a roaming provider in a visited network according to the present invention.

Referring to FIG. 3, a mobile terminal 100 capable of changing a roaming provider includes a communication unit 101, a user interface unit 102, a storage unit 103, an output unit 104, a location registration request unit 105, And a provider network change setting unit 106.

The communication unit 101, the user interface unit 102, the storage unit 103, and the output unit 104 are the same as those of a general mobile terminal, and a description thereof will be omitted.

The location registration request unit 105 moves to the visited network and requests the location registration to the home location register of the home network when powered on.

In addition, the location registration request unit 105 requests location registration to the home location register of the home network through the changed provider network in the roaming provider network change setting unit.

In addition, when the location registration requesting unit 105 receives a location registration rejection message indicating that roaming is impossible at the time of location registration request through an arbitrary visited network, the location registration request unit 105 retries the location registration through another service provider network , And if the location registration by the retry fails, the location registration for only the SMS incoming is performed through the arbitrary visited network.

When the roaming service provider change message is received from the visited network through the home network, the roaming provider network change setting unit 106 changes the current provider network to the provider network selected by the user through the user interface unit. The roaming provider change message may be an SMS indicating a method by which a user may manually select another operator network. Accordingly, the user selects a desired business network using the method indicated in the roaming company change message, and the roaming terminal requests location registration through the selected business network.

FIG. 4 is a flowchart illustrating a method of registering a roaming terminal, which has moved to a visited network according to the present invention, in a home network system.

Referring to FIG. 4, when the roaming terminal requests location registration through the second visiting network switching center (S400), the second visiting network switching center requests the location registration to the GLR of the home network through the roaming call relay system (S402) . That is, the roaming terminal selects a second visited network among a plurality of visited networks provided by different mobile communication providers of visited stations, and requests the location registration.

Then, the GLR determines whether the second visited network is a pre-designated provider network (S404). That is, the GLR determines whether it is a predetermined provider network by using the correspondence between the exchange ID information of the second visited network and the pre-stored provider network identification information included in the location registration request message.

If it is determined in step S404 that the mobile communication terminal is not a designated carrier network, the GLR requests location registration for SMS reception only to the home location register (S406).

In step S408, the home location register transmits the location registration completion message to the GLR by performing location registration for SMS reception only at the request of the GLR.

Then, the GLR transmits an SMS reception location registration completion message to the exchange of the second visited network (S410), and the exchange of the second visited network transmits an SMS reception location registration completion message to the roaming terminal S412). The roaming terminal can receive SMS only by receiving the SMS reception location registration completion message.

In step S414, the GLR requests the second visiting network switching center to transmit a roaming provider change message to allow the user of the roaming terminal to manually select another business network.

Then, the second visiting network switching center transmits a roaming provider change message to the roaming terminal according to the request of the GLR (S416). The roaming provider change message may be a method of manually selecting a different provider network in SMS form.

Upon receiving the roaming service provider change message, the roaming terminal changes the visited network to the service network (first visited network) selected by the user according to the roaming service provider change message (S418), and registers the location with the exchange of the first visited network (S420).

That is, the roaming terminal change message is displayed on the roaming terminal, and the roaming terminal user manually selects a desired operator network using the manual network selection method included in the message.

Then, the roaming terminal is changed from the current operator network to the operator network selected by the user, and the roaming terminal requests the location registration through the changed operator network.

In operation S422, the first visited network switch requesting location registration requests location registration to the GLR of the home network (S422), and the GLR requests location registration to the home location register (S424).

Then, the home location register performs location registration of the roaming terminal and transmits a location registration completion message to the GLR (S426). The GLR transmits a location registration completion message to the roaming terminal through the first visiting network switch (S428, S430).

If it is determined in step S404 that the network is a predetermined network, the GLR requests location registration to the home location register (S432). Then, the home location registration registers the location of the roaming terminal.

FIG. 5 is a flowchart illustrating a method for controlling location registration of a roaming terminal that has moved to a visited network according to the present invention.

Referring to FIG. 5, when the location registration request message of the roaming terminal is received from the visited network (S500), the GLR determines whether the visited network is a predetermined designated network (S502).

As a result of the determination in S502, if the GLR does not indicate a pre-designated provider network, the GLR transmits a location registration reject message to the roaming terminal through the visited network (S504). The location registration rejection message may be an instruction message indicating that the roaming terminal tries to register its location through a designated carrier network.

Upon receipt of the location registration rejection message, the roaming terminal tries to register the location through the designated carrier network, and the GLR determines whether the location registration through the predetermined carrier network of the roaming terminal is successful (S506).

If it is determined in step S506 that the location registration through the pre-designated provider network of the roaming terminal fails, the GLR requests location registration for SMS reception only to the home location register in step S508.

 Then, when the SMS receiving location registration completion message is received from the home location register (S510), the GLR transmits an SMS reception location registration completion message to the exchange of the visited network and then requests a roaming provider change message transmission ( S512).

When the location registration request message is received through the provider network selected by the roaming terminal according to the roaming provider change message in step S514, the GLR requests location registration to the home location register, (S516). Here, the provider network selected by the roaming terminal may be a provider network other than the predetermined preferred provider network or a preferred provider network.

If it is determined in step S502 that the visited network is a pre-designated provider network, the GLR performs step S516.

If it is determined in step S506 that the location registration of the roaming terminal through the pre-designated provider network is successful, the GLR performs step S516.

FIG. 6 is a flowchart illustrating a method of registering a location in a home network system by a roaming terminal moving to a visited network according to the present invention.

Referring to FIG. 6, the roaming terminal requests location registration to the GLR of the home network through the visited network (S600). When the location registration rejection message is received in response to the location registration request (S602) (S604).

That is, the location registration rejection message is an instruction message to try to register a location through a predetermined service provider network because the service provider network requesting location registration is a service provider network other than the predetermined service provider network, and the roaming terminal Location registration is attempted.

If the mobile terminal fails to register the location through the designated carrier network for a predetermined number of times (S606), the mobile terminal requests the location registration through the existing carrier network (S608).

Then, the GLR requests location registration for SMS reception to the home location register, and the home location register performs location registration for SMS reception only.

When the roaming terminal receives the SMS reception location registration completion message and the roaming provider change message from the GLR (S610, S612), the roaming service provider selects a roaming provider network for location registration from the user based on the roaming provider change message (S614 ).

In step S616, the roaming terminal requests location registration through the selected carrier network and receives a location registration completion message when the location registration for call processing is completed in step S618.

If it is determined in step S602 that the location registration rejection message is not received, the roaming terminal receives the location registration completion message for performing the call processing in step S618.

If it is determined in step S606 that the location registration through the designated carrier network is successful, the roaming terminal performs step S618.

Thus, those skilled in the art will appreciate that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

As described above, a system and method for location registration of an overseas roaming mobile terminal according to the present invention allow a roaming terminal user to register and select a preferred operator network, thereby enabling a user to use a service provided in a specific provider network And the like.

1 illustrates a system for location registration of an overseas roaming mobile terminal according to the present invention.

2 is a block diagram schematically showing a configuration of a roaming gateway apparatus according to the present invention;

3 is a block diagram schematically illustrating a configuration of a mobile terminal capable of changing a roaming provider in a visited network according to the present invention;

4 is a flowchart illustrating a method of registering a roaming terminal moved to a visited network according to the present invention in a home network system.

FIG. 5 is a flowchart illustrating a method for controlling location registration of a roaming terminal that has moved to a visited network according to the present invention.

6 is a flowchart illustrating a method of registering a location in a home network system by a roaming terminal which moves to a visited network according to the present invention.

Description of the Related Art

100: mobile terminal 101:

102: user interface unit 103: storage unit

104: output unit 105: location registration request unit

106: roaming provider network change setting unit 110: visited network

112, 190: base station 114, 170:

130: roaming call relay system 150: home network

160: GLR 162: visited network judgment unit

164: location registration control section 166: roaming provider change request section

180: HLR

Claims (19)

A home network system for location registration of a roaming terminal which has moved to a visited network, If the location registration request message of the roaming terminal is received from the visited network, it is determined whether the visited network is a pre-designated provider network. If the visited network is not the designated provider network, A GLR requesting transmission of a roaming provider change message to the visited network when the location registration is completed; and A home location register for performing location registration for an SMS call to the roaming terminal when location registration for SMS reception is requested from the GLR; And a location registration unit for registering location information of the foreign roaming mobile terminal. The method according to claim 1, Wherein the GLR transmits a location registration rejection message to the roaming terminal through the visited network if the visited network is not a designated network of a predetermined network, and when the location registration through the predetermined network of the roaming terminal fails, Wherein the location registration request for the SMS incoming is requested by the register. 3. The method of claim 2, Wherein the roaming terminal that has received the location registration rejection message through the GLR retries the location registration through a designated carrier network for a predetermined number of times. The method according to claim 1, The visiting network, which is requested to transmit a roaming provider change message from the GLR, generates a roaming provider change message and transmits it to the roaming terminal, Wherein the roaming service provider change message indicates a method of selecting another service provider network in SMS form. The method according to claim 1, Wherein the roaming terminal requests location registration through a provider network selected by a user according to a method included in the message when a roaming provider change message is received. A visiting network determiner for determining whether the visited network is a predetermined operator network when a location registration request message of the roaming terminal is received from the visited network; A location registration controller for determining whether to register a location for SMS reception according to a result of the visited network determination unit and controlling location registration of the roaming terminal; A roaming service provider change request unit for transmitting a roaming service provider change message to the roaming service terminal when the location registration control unit performs location registration for SMS reception; The roaming gateway apparatus comprising: a roaming gateway unit for roaming the roaming mobile terminal; The method according to claim 6, Wherein the visited network determining unit determines whether the network is a predetermined provider network by using the correspondence between the visited exchange exchange identification information included in the location registration request message and the pre- A roaming gateway device for location registration. The method according to claim 6, If it is determined that the visited network is not a designated network, the location registration controller requests the location registration for the SMS reception with the home location register, Wherein the roaming gateway apparatus requests the roaming gateway apparatus to register the location of the foreign roaming mobile terminal. The method according to claim 6, If the visited network is not a designated network, the location registration control unit transmits a location registration rejection message to the roaming terminal through the visited network as a result of the determination of the visited network determination unit. And when the location registration fails, the home location register requests the location registration for the SMS incoming call to the roaming gateway device for location registration of the foreign roaming mobile terminal. A mobile terminal having a user interface unit and capable of changing a roaming provider network, A location registration request unit for requesting location registration to a home location register of a home network when the mobile terminal moves to a visited network and is powered on; When the roaming provider change message is received from the visited network through the home network after the home location register completes location registration for SMS reception because the visited network is not a predetermined network, A roaming provider network change setting unit for changing the network to a business network selected by a user through a user interface unit; . 11. The method of claim 10, Wherein the location registration requesting unit requests location registration to the home location register of the home network through the changed carrier network in the roaming provider network change setting unit. 11. The method of claim 10, When the location registration request message is received, the location registration requesting unit retries the location registration through another service provider network. If the location registration request is failed due to the retry, the location registration request unit requests the location registration through the existing service provider network, And registers the mobile terminal. A method for location registration of a roaming terminal that has moved to a visited network in a home network system, (a) if the location registration request message of the roaming terminal is received from the visited network in the GLR, it is determined whether the visited network is a predetermined designated network, and if the visited network is not the designated network, Requesting location registration for the location registration; (b) performing the location registration only for SMS incoming according to the request of the GLR, and transmitting the SMS receiving location registration completion message to the GLR; (c) requesting transmission of a roaming provider change message after transmitting an SMS reception location registration completion message from the GLR to an exchange of the visited network; (d) the exchange of the visited network transmits a roaming provider change message to the roaming terminal; (e) the roaming terminal changes a visited network to a provider network selected by a user according to the roaming provider change message and requests location registration with the GLR; And (f) requesting the GLR to register a location with the home location register and registering the location of the roaming terminal with the home location register; The location registration method comprising the steps of: 14. The method of claim 13, The step (a) Determining whether the visited network is a pre-designated provider network when a location registration request message of the roaming terminal is received from the visited network; Transmitting a location registration rejection message to the roaming terminal through the visited network if the determined result is NO And requesting location registration for SMS reception with the home location register if location registration through the pre-designated provider network of the roaming terminal fails. 14. The method of claim 13, In the step (a) Further comprising the step of requesting location registration with the home location register if the visited network is a pre-designated provider network. A method for location registration of a roaming terminal in which a GLR moves to a visited network, (a) if the location registration request message of the roaming terminal is received from the visited network, it is determined whether the visited network is a pre-designated provider network, and if the visited network is not the designated network, Requesting registration; (b) requesting transmission of a roaming provider change message after transmitting an SMS reception location registration completion message to an exchange of the visited network when an SMS reception location registration completion message is received from the home location register; (c) if the location registration request message is received through the provider network selected by the roaming terminal according to the roaming provider change message, the location registration request is requested to the home location register so that the location of the roaming terminal is registered in the home location register ; The location registration method comprising the steps of: 17. The method of claim 16, The step (a) Determining whether the visited network is a pre-designated provider network when a location registration request message of the roaming terminal is received from the visited network; Transmitting a location registration rejection message to the roaming terminal through the visited network if the determined result is NO And requesting location registration for SMS reception with the home location register if location registration through the pre-designated provider network of the roaming terminal fails. 17. The method of claim 16, In the step (a) Further comprising the step of requesting location registration with the home location register if the visited network is a pre-designated provider network. A method for location registration of a roaming terminal that has moved to a visited network in a home network system, Requesting location registration to the GLR of the home network through the visited network; When a location registration rejection message is received in response to the location registration request, attempting to register the location through a predetermined business network; Requesting a location registration through the visited network and registering the location for an SMS incoming call if the location registration through the predetermined provider network fails; When the roaming provider change message is received, requesting location registration by changing the visited network with the business network selected by the user; The location registration method comprising the steps of:

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