KR100943733B1 - Method for providing a mobile communication service and mobile communication system for the same - Google Patents

Abstract

The present invention relates to a mobile communication service providing method and a mobile communication service providing method therefor.

In accordance with another aspect of the present invention, there is provided a method of providing a mobile communication service, comprising: receiving a location registration completion message indicating a location registration of a subscriber from a home network of an inbound roaming subscriber; and corresponding to attribute information of a terminal used by the subscriber; And providing the service, wherein the attribute information is information representing the function or performance of the terminal.

Mobile communication, roaming, service, terminal

Description

Method for providing a mobile communication service and a mobile communication system for the same {Method for providing a mobile communication service and mobile communication system for the same}

The present invention relates to mobile communication, and more particularly, to a method of providing a mobile communication service for providing an appropriate service to an inbound roaming subscriber and a mobile communication system for the same.

The ultimate purpose of the mobile communication service is to provide a mobile communication subscriber with a convenient communication anytime, anywhere. However, there are limitations in providing mobile communication services in all regions in which mobile subscribers move because the service providers are divided by regions and the systems are diverse.

Roaming service is one of the methods for solving the regional limitations of the mobile communication service. In particular, the demand for international roaming services is increasing by mobile subscribers traveling between countries. Accordingly, the demand for additional services of international roaming services is also increasing.

Therefore, there is a need for a technology that can provide more efficient additional services to subscribers using international roaming services.

An object of the present invention is to provide a service suitable for a terminal used by an inbound roamer.

The objects of the present invention are not limited to the above-mentioned objects, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

In order to achieve the above object, a method of providing a mobile communication service according to an embodiment of the present invention comprises the steps of receiving a location registration complete message indicating that the location registration of the subscriber is completed from the home network of the inbound roaming subscriber, and the subscriber And providing a service corresponding to the attribute information of the terminal, wherein the attribute information is information representing the function or performance of the terminal.

In order to achieve the above object, a mobile communication system according to an embodiment of the present invention, the gateway location register for communicating with the home network of the inbound roaming subscriber, and the location registration to inform that the location registration of the subscriber is completed from the home network When the message is received, a roaming service control device for controlling the provision of a service corresponding to the attribute information of the terminal used by the subscriber, characterized in that the attribute information is information indicating the function or capability of the terminal. .

Specific details of other embodiments are included in the detailed description and the drawings.

According to the mobile communication service providing method and the mobile communication system of the present invention as described above there is an effect that can provide a service suitable for the terminal used by the inbound Romer.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a mobile communication system 100 according to an embodiment of the present invention. The mobile communication system 100 includes a first mobile communication network 10 and a second mobile communication network 20. According to an embodiment of the present invention, the first mobile communication network 10 may be a domestic network and the second mobile communication network 20 may be an overseas network. The first mobile communication network 10 and the second mobile communication network 20 may be based on Code Division Multiple Access (CDMA), Wideband CDMA (WCDMA), or Global System for Mobile Telecommunication (GSM). However, the present invention is not limited thereto, and the first mobile communication network 10 and the second mobile communication network 20 may be based on other types of mobile communication schemes.

In FIG. 1, the terminal 30 may be a mobile communication device such as a mobile phone or a personal digital assistant (PDA). In FIG. 1 and the following embodiments, the home network of the terminal 30 will be described as the second mobile communication network 20. That is, the user of the terminal 30 is a subscriber of the second mobile communication network 20. However, the present invention is not limited thereto.

Terminal 30 may hold a terminal identifier. The terminal identifier is a unique value identifying the terminal 30 from another terminal, and may be assigned to the terminal 30 from a terminal manufacturer or an authorized authority when the terminal 30 is produced.

The terminal 30 may be connected with an information card including a subscriber identifier. The subscriber identifier is information uniquely identifying the subscriber, for example, an International Mobile Station Identity (IMSI). The information card can also generate an authentication value using a predetermined authentication function. The authentication value may be used when authenticating the subscriber in the first mobile communication network 10.

The information card may be detachably connected to the terminal 30 or may be fixed to the terminal 30 to prevent the subscriber from detaching the information card from the terminal 30 arbitrarily. The information card may include a memory capable of storing data and a central processing unit (CPU) capable of performing a predetermined operation. Examples of such information cards include a subscriber identity module (SIM) card and a universal subscriber identity module (USIM) card.

The first mobile communication network 10 includes a base station 110, a Radio Network Controller (RNC) 120, a Mobile Switching Center (MSC) 130, and an Equipment Identity Register (EIR) 140. Roaming Service Control Point (RSCP) 150, Gateway Location Register (GLR) 160, Home Location Register (HLR) 170, and Authentication Center (AuC) , 180). In FIG. 1, each of the devices 110 to 180 constituting the first mobile communication network 10 is illustrated one by one. However, the present invention is limited thereto because it only schematically illustrates a basic configuration of the first mobile communication network 10. It doesn't happen. Accordingly, the first mobile communication network 10 may include a plurality of devices 110 to 180.

The base station 110 is a primary access point of the terminal 30, and may transmit and receive various signals and data with the terminal 30. That is, the base station 110 may perform a wireless modem function consisting of an antenna and a transmission / reception modem. The communication channel from the terminal 30 toward the base station 110 is called an uplink channel, and the communication channel from the base station 110 toward the terminal 30 is called a downlink channel.

The radio network controller 120 may control the base station 110 and manage radio resources. More specifically, the radio network controller 120 may instruct the base station 110 to allocate a communication channel to the terminal 30 and control the transmission output of the base station 110. In addition, the radio network controller 120 may support handover for a terminal moving between base stations.

The mobile exchange 130 may be connected to one or more wireless network controllers to relay communication between the terminal 30 and another terminal (not shown). According to an embodiment of the present invention, the mobile exchange 130 may perform an authentication operation for the user of the terminal 30.

The EIR 140 may manage terminal identifiers of terminals produced by the terminal manufacturer. An example of the terminal identifier is IMEI (International Mobile Equpment Identity). The terminal identifier of the newly produced terminal may be obtained directly from the terminal manufacturer, or may be obtained from a server (not shown) that handles registration for the new terminal of each manufacturer.

In addition, the EIR 140 may manage state information of the terminal. The state information of the terminal may include information for identifying whether the terminal is normal. According to an embodiment of the present invention, the state information of the terminal may be set to any one of “white”, “black”, and “gray”. The state information of the terminal which can be used normally may be set to "normal". However, the status information of the terminal which may cause a malfunction in the terminal or the mobile communication network where the theft report is received may be set to “abnormal”. In addition, the terminal information which does not satisfy the communication conditions required by the mobile communication network or the terminal whose status information is "normal" or "abnormal" may be set to "abnormal estimation". Since the present invention is not limited by the embodiment of the EIR 140 collects the state information of the terminal, a detailed description thereof will be omitted.

The first mobile communication network 10 may block communication of the terminal whose status information is “abnormal”. Whether or not to block communication for the terminal whose status information is “abnormal estimation” may vary according to embodiments.

The EIR 140 may map state information of a corresponding terminal to a terminal identifier of each terminal. For example, when obtaining a terminal identifier of a newly generated terminal, the EIR 140 may map state information “normal” to the terminal identifier. If the loss report is received for the terminal, the EIR 140 may change the state information mapped to the terminal identifier of the terminal from "normal" to "abnormal".

The state information of the terminal may be shared for each mobile network operator. For example, the EIR 140 may share state information of a terminal managed by an EIR (not shown) of the second mobile communication network 20.

The RSCP 150 may manage a service to be provided to an inbound roaming terminal or an outbound roaming terminal. The service managed by RSCP 150 may be an intelligent network based service. For example, the RSCP 150 may manage a message transmission service based on a short message service (SMS) or an unstructured supplementary services data (USSD) for an inbound roaming terminal.

Preferably, the RSCP 150 may drive the service logic suitable for the terminal according to the attribute information of the terminal. The RSCP 150 may manage attribute information of various terminals produced by the terminal manufacturer. Of course, there is a separate server (not shown) that manages the attribute information, and the RSCP 150 may access the server to check the attribute information of the terminal. The attribute information may include information indicating the function or performance of the terminal, such as a language supported by the terminal, a screen resolution of the terminal, a type of codec provided in the terminal.

The GLR 160 may perform a function as an HLR for the terminal 30 roaming from the second mobile communication network 20 to the first mobile communication network 10. In addition, the GLR 160 may perform a function of a terminal location register (VLR) of the terminal 30 with respect to the second mobile communication network 20 which is the home network of the terminal 30.

The HLR 170 may manage location information of the subscriber (eg, VLR address, MSC address, etc. where the terminal is currently located) and subscriber additional service information.

The AuC 180 may support authentication for a mobile subscriber and encryption function for a wireless call interval. Although AuC 180 is shown as a device independent of HLR 170 in FIG. 1, AuC 180 may be included in HLR 170.

Meanwhile, the second mobile communication network 20 may also include devices corresponding to the devices 110 to 180 constituting the first mobile communication network 10. Although only the HLR 22 and AuC 24 are shown in FIG. 1 in the second mobile communication network 20, this is for convenience of description only and the present invention is not limited thereto.

Hereinafter, when the terminal 30 having the second mobile communication network 20 as the home network roams into the first mobile communication network 10 in the mobile communication system 100 shown in FIG. 1, the first mobile communication network 20 may be used. The process of providing a service to the terminal 30 will be described. The service providing process according to an embodiment of the present invention may include a subscriber authentication operation, a terminal authentication operation, a location registration operation, and a service driving operation. Tasks included in the service providing process are merely grouping specific processes of the service providing process to help the understanding of the present invention. Therefore, the service providing process should not be divided into the detailed tasks, and the present invention is not limited by the names of the detailed tasks. For convenience of description, in the following embodiments, operations of the base station 110 and the RNC 120 of FIG. 1 will be omitted.

2 is a flowchart illustrating a subscriber authentication operation according to an embodiment of the present invention.

When the subscriber roams to the first mobile communication system 10, the terminal 30 may transmit a location registration request message to the MSC 130 (S210). The location registration request message may include a subscriber identifier. For example, the terminal 30 may read the subscriber identifier stored in the information card mounted thereon, and transmit a location registration request message including the same to the MSC 130.

The subscriber identifier may include country information and network information of the second mobile communication network 20 to which the terminal 30 subscribes. Therefore, it is possible to identify the second mobile communication network 20 which is the home network of the terminal 30 through the subscriber identifier. For example, IMSI, an embodiment of a subscriber identifier, includes a mobile country code (MCC) and a mobile network code (MCC), where a combination of MCC and MNC can be used to uniquely identify a home network of a mobile subscriber.

Accordingly, the MSC 130 receiving the location registration request message from the terminal 30 may check whether the subscriber is an inbound roamer through the subscriber identifier included in the location registration request message. If the subscriber is an inbound roamer, the MSC 130 may transmit an authentication information request message to the GLR 160 requesting authentication information necessary to authenticate the subscriber (S215). The authentication information request message may include a subscriber identifier obtained by the MSC 130 from the location registration request message.

The GLR 160 may transmit an authentication information request message to the HLR 22 of the second mobile communication network 20, which is the home network of the subscriber (S220), and the HLR 22 sends the subscriber identifier included in the authentication information request message to Auc. It may be transmitted to the 24 (S225). Of course, in step S225, the HLR 22 transmits the authentication information request message to the AuC 24, and the AuC 24 obtains the subscriber identifier from the authentication information request message.

The AuC 24 may generate a first authentication value using an authentication key corresponding to the subscriber identifier (S230). The authentication key may be shared between the subscriber's information card and the AuC 24 when the subscriber joins the home network in advance. According to an embodiment of the present invention, in order to generate the first authentication value, the AuC 24 may use an authentication function having an authentication key and a predetermined random number as input values. The random number can be a string of numbers, a string, or a combination thereof. The random number required to generate the first authentication value may be generated by the AuC 24 directly, or may be selected by the AuC 24 from a plurality of previously generated random numbers.

After generating the first authentication value, the AuC 24 may transmit the first authentication value and the random number used to generate the first authentication value to the HLR 22 (S235).

The HLR 22 may transmit an authentication information response message including the first authentication value and the random number received from the AuC 24 to the GLR 160 (S240), and the GLR 160 may transmit the authentication information response message to the MSC ( 130 may be transmitted to (S245).

The MSC 130 may obtain a random number included in the authentication information response message and transmit an authentication value request message including the obtained random number to the terminal 30 (S250).

The terminal 30 may obtain a random number from the authentication value request message, and may transmit an authentication value response message including the second authentication value calculated using the random number to the MSC 130 (S255). Here, the second authentication value may be generated by an information card connected to the terminal 30. That is, the terminal 30 may extract a random number from the authentication value request message sent from the MSC 130, and transfer the extracted random number to the information card connected to it. In this case, the information card may calculate the second authentication value using the transferred random number and the authentication key held by the information card, and the calculated second authentication value may be transmitted to the terminal 30. The authentication function used to calculate the second authentication value is the same as the authentication function used by the AuC 24 when generating the first authentication value.

The MSC 130 may perform an authentication operation for the subscriber by comparing the first authentication value transmitted from the GLR 160 and the second authentication value transmitted from the terminal 30 (S260). The authentication function and the input value (random number and authentication key) of the authentication function used to generate the first authentication value are the same as the input values (random number and authentication key) of the authentication function and authentication function used to generate the second authentication value. . Therefore, if the information card connected to the terminal 30 is in a normal state, the second authentication value generated by the information card and the first authentication value generated by the Auc 24 will be the same. However, if the information card is forged / modulated by illegal copying or hacking, the second authentication value generated by the information card and the first authentication value generated by the Auc 24 will be different from each other.

If the first authentication value is different from the second authentication value, the MSC 130 may determine that an error has occurred in the information card connected to the terminal 30. This may mean that the user of terminal 30 is not a legitimate subscriber. If the subscriber authentication fails, communication between the terminal 30 and the first mobile communication network 30 may be interrupted, and the first mobile communication network 10 may not provide a mobile communication service to the terminal 30. Of course, as the subscriber authentication fails, an additional message transmission and processing operation may be performed to normally terminate communication between the terminal 30 and the first mobile communication network 30, but a description thereof will be omitted.

Meanwhile, when the first authentication value is the same as the second authentication value, the MSC 130 may determine that there is no error in the information card connected to the terminal 30. This may mean that the user of the terminal 30 is a legitimate subscriber. If the subscriber authentication is successful, the terminal authentication operation may be performed, which will be described with reference to FIG. 3.

If the subscriber is found to be legitimate in the process of FIG. 2 (that is, if there is no problem with the information card connected to the terminal 30), the MSC 130 may transmit a terminal identifier request message to the terminal 30 ( S310).

The terminal 30 may transmit a terminal identifier response message including its own terminal identifier to the MSC 130 in response to the terminal identifier request message (S320).

Thereafter, the MSC 130 may transmit a terminal authentication request message including the terminal identifier and the subscriber identifier to the EIR 140 (S330). The terminal identifier may be obtained from a terminal identifier response message. In addition, the subscriber identifier may be obtained from the location registration request message transmitted in step S210 of FIG.

The EIR 140 may check whether the subscriber is an inbound roamer by using the subscriber identifier included in the terminal authentication request message transmitted from the MSC 130 (S340). If the subscriber is an inbound roamer, the EIR 140 may transmit the terminal identifier and the subscriber identifier obtained in the terminal authentication request message to the RSCP 150 (S350). At this time, the RSCP 150 may store the terminal identifier and the subscriber identifier transmitted from the EIR 140 (S360). Preferably, RSCP 150 may generate and store a mapping table between the terminal identifier and the subscriber identifier.

Meanwhile, the EIR 140 may perform authentication on the terminal 30 using the terminal identifier (S370). For example, the EIR 140 may check whether the terminal identifier is mapped with state information of “normal”, “abnormal”, or “abnormal estimation” using the state information list managed by the EIR 140. Of course, the EIR 140 may check the state information of the terminal identifier by referring to the terminal state information list managed by another server (not shown). If the state information of the terminal 30 is 'abnormal' or 'abnormal estimation', the EIR 140 may determine that the terminal 30 is not valid. However, if the state information of the terminal 30 is "normal", the EIR 140 may determine that the terminal 30 is valid. Of course, even when the state information of the terminal 30 is " abnormal estimation ", an embodiment in which the EIR 140 determines that the terminal 30 is valid may be possible.

Thereafter, the EIR 140 may transmit a terminal authentication response message including the terminal authentication result to the MSC 130 (S380). The terminal authentication result may include information on whether the terminal 30 is valid. If the terminal 30 is not valid, the MSC 130 may notify the terminal 30 and stop the communication with the terminal 30. However, if the terminal 30 is valid, that is, if the authentication of the terminal 30 is successful, the location registration operation of the subscriber may be performed.

In FIG. 3, the process S370 for performing authentication for the terminal is illustrated as being performed after the processes S340 and S350, but the present invention is not limited thereto. For example, process S370 may be preceded by process S340. In this case, the EIR 140 may perform step S340 when the state information of the terminal 30 is "normal" (in some embodiments, the state information may be "abnormal estimation").

4 is a flowchart illustrating a location registration operation according to an embodiment of the present invention.

If both the subscriber and the terminal 30 is valid, the MSC 130 may transmit a location registration request message requesting the location registration of the subscriber to the GLR 160 (S410). The location registration request message may include the subscriber identifier of the subscriber. Accordingly, the GLR 160 may know the subscriber's home network and may transmit a location registration request message to the HLR 22 of the second mobile communication network 20 that is the subscriber's home network (S420). The location registration request message transmitted in step S420 may include the address of the GLR 160.

The HLR 22 stores the address of the GLR 160 and may retrieve the subscriber profile using the subscriber identifier included in the location registration request message. At this time, the HLR 22 recognizes the GLR 160 as the VLR of the home network, and may determine that the current location of the subscriber corresponds to the GLR 160. If the subscriber profile is found, the HLR 22 may transmit a profile message including the subscriber profile to the GLR 160 (S430). The subscriber profile may include information about various services that can be provided to the subscriber.

The GLR 160 may store the subscriber profile included in the profile message transmitted from the HLR 22, and transmit a profile response message to the HLR 22 in response to the subscriber profile transmission (S440).

The HLR 22 receiving the profile response message may transmit a location registration complete message to the GLR 160 (S450), and the GLR 160 may transmit a location registration complete message to the MSC 130 (S460).

Thereafter, the MSC 130 may transmit a location registration completion message to the terminal 30 (S470). As a result, the location registration work of the subscriber may be completed, and the subscriber may be provided with the service of the first mobile communication network 10 by using the terminal 30.

If location registration is successfully completed, a service driving operation for providing an appropriate service to the terminal 30 may be performed. This will be described with reference to FIG. 5.

When the location registration is successfully completed, the GLR 160 may transmit a notification message indicating that the location registration of the subscriber is completed to the RSCP 150 (S510). The notification message may include the subscriber identifier of the subscriber whose location registration is completed.

Thereafter, the RSCP 150 may retrieve attribute information of the terminal 30 used by the subscriber whose location registration is completed (S520).

According to an embodiment of the present invention, the terminal identifier may include information indicating the type of the terminal 30. For example, IMEI, which is an embodiment of a terminal identifier, may have a structure as shown in FIG. 6. Among these, the TAC field 610 may include information (NN) for identifying the agency to which the IMEI has been assigned and information (XXXX) for identifying the type of the terminal 30, and the FAC field 620 may indicate the terminal manufacturer. May include identifying information (YY). That is, it is possible to identify the manufacturer and type of the terminal 30 through the IMEI (600).

Therefore, in order to know what type of terminal the subscriber uses in step S520, the RSCP 150 extracts the subscriber identifier from the notification message sent from the GLR 160 and uses the mapping table stored in step S360 of FIG. 3. The terminal identifier corresponding to the subscriber identifier can be retrieved. Thereafter, the RSCP 150 may check the terminal type through the terminal identifier and search the attribute information of the corresponding terminal. Of course, since the operation of finding out what type of terminal the subscriber uses is variously implemented according to the embodiment, the present invention is not limited to the above description.

When the attribute information of the terminal 30 used by the subscriber is found, the RSCP 150 may drive service logic suitable for the attribute information of the terminal 30 (S530). For example, if the language information is supported by the terminal 30 through the attribute information, the RSCP 150 may provide a short message service (SMS) or unstructured supplementary services data (USSD) in the first language. A request may be made to a related service providing server (not shown) of the communication network 10. Accordingly, the first mobile communication network 10 can provide a service suitable for the property of the terminal 30.

According to an embodiment of the present invention, if the attribute information of the terminal 30 is determined, the RSCP 150 may generate, as subscriber information, types of services that can be provided to the subscriber according to the attribute information of the terminal 30. have. When a specific service is requested from the terminal 30 later, the RSCP 150 controls the service providing procedure so that the service can be provided in a format suitable for the attribute information of the terminal 30 with reference to the requested generated subscriber information. It may be.

Meanwhile, according to an embodiment of the present invention, the notification message transmitted in step S510 of FIG. 5 may include a subscriber profile of the subscriber. In this case, the RSCP 150 may use the subscriber profile included in the notification message when generating the subscriber information or driving the service logic suitable for the attribute information of the terminal 30.

The above-described embodiments of the operation of the mobile communication system 100 may be read by a computer on a medium and may be executed through code or instructions for controlling at least one processing element. The medium may store or transmit computer readable codes.

The computer readable code may be recorded or transmitted through various types of media. Examples of such media include transmission media such as carrier waves and recording media such as magnetic storage media (e.g. ROM, floppy disks, hard disks) or optical recording media (e.g. CD-ROM or DVD). Can be mentioned. In addition, according to an embodiment of the present invention, the medium may be a signal such as a composite signal or a bitstream. Since the medium may be a distributed network, computer readable code or instructions may be stored and transmitted on a plurality of media in a distributed manner for execution.

In addition, the processing element may comprise a processor or a computer processor. The processing element may be distributed in a plurality of devices or servers, or may be included in one device or server.

Although embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. You will understand that. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

1 is a diagram illustrating a mobile communication system according to an embodiment of the present invention.

2 is a flowchart illustrating a subscriber authentication operation according to an embodiment of the present invention.

3 is a flowchart illustrating a terminal authentication operation according to an embodiment of the present invention.

4 is a flowchart illustrating a location registration operation according to an embodiment of the present invention.

5 is a flowchart illustrating a service driving operation according to an embodiment of the present invention.

6 illustrates a terminal identifier according to an embodiment of the present invention.

<Explanation of symbols on main parts of the drawings>

110: base station 120: wireless network controller

130: mobile exchanger 140: equipment identity register

150: roaming service control device 160: Kateway location register

170: home location register 180: authentication device

Claims (14)

Receiving a location registration complete message indicating that the location registration of the subscriber is completed from the home network of the inbound roaming subscriber; And Providing a service corresponding to the attribute information of the terminal used by the subscriber, And the attribute information is information representing a function or performance of the terminal. The method of claim 1, wherein providing the service comprises: Searching for a terminal identifier to which the subscriber identifier of the subscriber included in the location registration complete message is mapped; Retrieving the attribute information corresponding to the retrieved terminal identifier; And Driving service logic according to the retrieved attribute information; The attribute information includes at least one of a language supported by the terminal, a screen resolution of the terminal, and a type of codec provided in the terminal. The method of claim 1, Receiving a location registration request message requesting location registration of the subscriber from the terminal; Performing subscriber authentication for the subscriber; Performing terminal authentication for the terminal when the subscriber is a valid subscriber as a result of the subscriber authentication; And And transmitting the location registration request message to the home network of the subscriber when the terminal is a valid terminal as a result of the terminal authentication. The method of claim 3, Generating a mapping table between the subscriber identifier of the subscriber and the terminal identifier of the terminal when the subscriber is an inbound roamer. The method of claim 4, wherein The subscriber identifier is an International Mobile Station Identity (IMSI), and the terminal identifier is an International Mobile Equpment Identity (IMEI). The method of claim 3, wherein performing the subscriber authentication comprises: Receiving a first authentication value calculated using the subscriber identifier of the subscriber from the subscriber's home network; Receiving a second authentication value calculated using the subscriber identifier from the terminal; And And if the first authentication value and the second authentication value are the same, determining the subscriber as a valid subscriber. The method of claim 3, wherein performing the terminal authentication comprises: If the subscriber is a valid subscriber, transmitting a terminal identifier request message to the terminal; Receiving a terminal identifier response message including a terminal identifier of the terminal from the terminal; Retrieving terminal state information corresponding to the terminal identifier included in the terminal identifier response message; And And determining whether the terminal is valid by using the retrieved state information. A gateway location register for communicating with a home network of an inbound roaming subscriber; And Roaming service control device for controlling the provision of the service corresponding to the attribute information of the terminal used by the subscriber, when the location registration complete message indicating that the location registration of the subscriber is completed from the home network, And the attribute information is information representing a function or performance of the terminal. The method of claim 8, The roaming service control device retrieves a terminal identifier to which a subscriber identifier of the subscriber included in the location registration complete message is mapped, and drives service logic according to the attribute information corresponding to the retrieved terminal identifier. The attribute information includes at least one of a language supported by the terminal, a screen resolution of the terminal, and a type of codec provided in the terminal. The method of claim 8, A mobile switch that performs subscriber authentication for the subscriber when a location registration request message for requesting the subscriber's location registration is received from the terminal; If the subscriber is a valid subscriber as a result of the subscriber authentication further comprises a device identity register for performing a terminal authentication for the terminal, And the gateway location register transmits the location registration request message to the home network when the terminal is a valid terminal as a result of the terminal authentication. The method of claim 10, And the roaming service control device generates a mapping table between the subscriber identifier of the subscriber and the terminal identifier of the terminal when the subscriber is an inbound roamer. The method of claim 11, Wherein the subscriber identifier is an International Mobile Station Identity (IMSI) and the terminal identifier is an International Mobile Equpment Identity (IMEI). The method of claim 10, And the mobile switch determines the subscriber as a valid subscriber when the first authentication value received from the subscriber's home network and the second authentication value received from the terminal are the same. The method of claim 10, The device identity register transmits a terminal identifier request message to the terminal when the subscriber is a valid subscriber and includes the terminal identifier response message when the terminal identifier response message including the terminal identifier of the terminal is received from the terminal. And determining whether the terminal is valid using terminal state information corresponding to the terminal identifier.

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