KR20110070448A - Method and system for providing outbound roaming information of mobile device - Google Patents

Abstract

PURPOSE: A method and a system for improving the outbound roaming information of a mobile terminal are provided for a contents provider to selectively offer a wireless data service with reference to the outbound roaming information of the mobile terminal. CONSTITUTION: An SMSC(Short Message Service Center)(130) receives a roaming information request message for the request of the outbound roaming information of a mobile terminal(10). As the response of the message, the SMSC creates a roaming information response message including the roaming information of the mobile terminal. A roaming information providing unit(170) transmits the outbound roaming information of the mobile terminal within the roaming information response message to a CP(Contents Provider)(180).

Description

Method and system for providing outbound roaming information of mobile device

The present invention relates to a method and system for providing outbound roaming information of a mobile terminal, and more particularly, to a method and system for providing outbound roaming information of a mobile terminal to a content provider providing a wireless data service. will be.

Roaming is a communication connection between service providers of different service providers, and includes inbound roaming and outbound roaming.

Inbound roaming means that a mobile subscriber of another station continues to use his mobile terminal even after moving to Korea. On the other hand, outbound roaming service means that the domestic mobile communication subscriber continues to use his mobile terminal even after moving to another country.

Outbound roaming information indicating whether the mobile terminal is outbound roaming is managed by the home location register of the mobile communication network. Currently, the home location register of a mobile communication network is not synchronized with a database of a content provider that provides a wireless data service, because the current location of the mobile location network and the content provider's database are complicated. This is because it costs a lot.

As such, since the content provider cannot check outbound roaming information of the mobile terminal, various problems occur when providing a wireless data service to the mobile terminal. For example, even when the mobile terminal is outbound roaming, a push type wireless data service is processed, and a problem arises in that an expensive roaming data fee is charged regardless of the intention of the mobile terminal user.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described problem, and an object thereof is to provide a method and a system capable of providing outbound roaming information of a mobile terminal to a content provider providing a wireless data service.

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

In order to achieve the above object, a system for providing outbound roaming information of a mobile terminal according to an embodiment of the present invention receives a roaming information request message for requesting outbound roaming information of a mobile terminal, and as a response, A Short Message Service Center (SMSC) for generating a roaming information response message including roaming information of the mobile terminal; And a roaming information providing apparatus for transmitting outbound roaming information of the mobile terminal included in the roaming information response message to a content provider.

In order to achieve the above object, according to an embodiment of the present invention, a method for providing outbound roaming information of a mobile terminal includes a short message of a roaming information request message for requesting outbound roaming information of a mobile terminal by a roaming information providing device; Transmitting to a Short Message Service Center (SMSC); Transmitting, by the short message service center, a roaming information response message including roaming information of the mobile terminal to the roaming information providing device as a response to the roaming information request message; And transmitting, by the apparatus for providing roaming information, outbound roaming information of the mobile terminal included in the roaming information response message to a content provider.

According to the present invention, the following effects are obtained.

The content provider may selectively provide a wireless data service by referring to the outbound roaming information of the mobile terminal, and prevent roaming data charges from occurring regardless of the intention of the mobile terminal user.

The content provider may be provided with outbound roaming information of the mobile terminal in real time without having to present his database and the home location register of the mobile communication network.

It is possible to reduce the equipment and costs required to bring the database of the home location register and the content provider of the mobile communication network into being, and the equipment and the cost required to bring the roaming information database of the home location register and the device for providing roaming information in the mobile network Can reduce the cost.

Advantages and features of the present invention, and methods for achieving them will be apparent with reference to the embodiments described below in detail in conjunction with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be embodied in various different forms, and the present embodiments merely make the disclosure of the present invention complete and common knowledge in the technical field to which the present invention belongs. It is provided to fully inform the person having the scope of the invention, which is defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

Hereinafter, the present invention will be described with reference to the drawings for a block diagram or a process flowchart for explaining embodiments of the present invention. At this point, it will be understood that each block of the flowchart illustrations and combinations of flowchart illustrations may be performed by computer program instructions.

Since these computer program instructions may be mounted on a processor of a general purpose computer, special purpose computer, or other programmable data processing equipment, those instructions executed through the processor of the computer or other programmable data processing equipment may be described in flow chart block (s). It creates a means to perform the functions.

These computer program instructions may be stored in a computer usable or computer readable memory that can be directed to a computer or other programmable data processing equipment to implement functionality in a particular manner, and thus the computer usable or computer readable memory. It is also possible for the instructions stored in to produce an article of manufacture containing instruction means for performing the functions described in the flowchart block (s).

Computer program instructions may also be mounted on a computer or other programmable data processing equipment, such that a series of operating steps are performed on the computer or other programmable data processing equipment to create a computer-implemented process to generate a computer or other programmable data. Instructions for performing the processing equipment may also provide steps for performing the functions described in the flowchart block (s).

In addition, each block may represent a portion of a module, segment, or code that includes one or more executable instructions for executing a specified logical function (s). It should also be noted that in some alternative implementations, the functions noted in the blocks may occur out of order. For example, the two blocks shown in succession may in fact be executed substantially concurrently, or the blocks may sometimes be executed in the reverse order, depending on the corresponding function.

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

1 is a diagram schematically illustrating a configuration of a system for providing outbound roaming information of a mobile terminal (hereinafter, referred to as an 'outbound roaming information providing system') according to an embodiment of the present invention.

As shown in FIG. 1, the outbound roaming information providing system includes a mobile terminal 10 and a mobile communication network 100.

The mobile terminal 10 is a device provided with a mobile communication service, and may include a personal digital assistants (PDAs), computers, and the like, as well as a device used for wireless communication, having a wireless communication function. Can be. The mobile terminal 10 may be fixed or mobile, and may be referred to as terms such as a mobile station (MS), a user equipment (UE), a subscriber station (SS), a wireless device, etc., but is not limited thereto. .

The mobile communication network 100 is a home network, including a base station (RNS: Radio Network Subsystem) 111 and a base station controller (RNC: Radio Network Controller, 112), a radio access network 110, a mobile communication switch (MSC), 120), Home Location Register (HLR) 140, Short Message Service Center (SMSC) 130, Short Message Service Gateway (SMS GW 160), Roaming Information Device 170 may be included.

The RNS 111 may transmit / receive various signals and data with the mobile terminal 10 in the cell managed by the RNS 111, and may perform a role such as wireless channel management in the RNS 111. The base station may also be referred to as terms such as node-B, base transceiver system (BTS), and access point.

The RNC 112 may control the RNS 111 and manage radio resources. More specifically, the RNC 112 may instruct the RNS 111 to allocate a communication channel to the mobile terminal 10 and control the transmission output of the RNS 111. In addition, the RNC 112 may support handoff for the mobile terminal 10 moving between the RNS 111.

The MSC 120 may also be referred to as a 'voice exchanger' and may be connected to one or more RNCs 112 to relay communications between the mobile terminal 10 and another mobile terminal 10 (not shown). In addition, the MSC 120 may serve as a service switching point (SSP) for providing an intelligent network service. For example, the subscriber's incoming and outgoing call processing, location registration procedure, and handoff procedure processing. In addition, interworking with external networks can be performed. In addition, the MSC 120 may perform a function of a visitor location register (VLR).

The roaming information providing apparatus 170 is a service distribution platform (SDP) that provides an application programming interface (API) such as authentication / message transmission as one interface common to the content provider 180 or another wireless data infrastructure. to be. When the roaming information providing apparatus 170 requests outbound roaming information of the mobile terminal 10 of the content provider 180, the roaming information providing apparatus 170 may obtain and provide outbound roaming information of the mobile terminal 10 from the HLR.

In detail, when the content provider 180 requests outbound roaming information of the mobile terminal 10, the roaming information providing apparatus 170 may request a roaming information request message 200 requesting outbound roaming information of the mobile terminal 10. ) Is sent to the SMS GW 160. Then, when the roaming information response message 300 including the outbound roaming information of the mobile terminal 10 is received from the SMS GW 160, the roaming information providing apparatus 170, the outbound roaming information of the mobile terminal 10 Is transmitted to the content provider 180. According to an embodiment of the present invention, the roaming information providing apparatus 170 may use an SMS message defined in a communication protocol for a short message service (SMS) as the roaming information request message 200. . For example, a submit message may be used as the roaming information request message 200 among SMS messages defined in a communication protocol such as Short Message Peer to Peer (SMPP) or Short Message Client Interface (SMCI). A detailed description of the roaming information request message 200 will be described later with reference to FIG. 2.

The SMS GW 160 relays a message exchange between the roaming information providing apparatus 170 and the SMSC 130. That is, the SMS GW 160 receives the request message from the roaming information providing apparatus 170 and transmits the request message to the SMSC 130, or receives the response message from the SMSC 130 and transmits the response message to the roaming information providing apparatus 170. To this end, the SMS GW 160 may support a communication protocol such as SMPP or SMCI.

The SMSC 130 transfers a short message between the mobile terminal 10 and the mobile terminal 10 or between the mobile terminal 10 and the short message entities (SMEs). SMSC 130 has a short message storage / management function, a short message transmission function for this purpose. According to an embodiment of the present invention, the SMSC 130 may request the outbound roaming information of the mobile terminal 10 from the HLR 140 as the roaming information request message 200 is received from the SMS GW 160. . When the outbound roaming information of the mobile terminal 10 is received from the HLR 140, the SMSC 130 may transmit a roaming information response message 300 including the received outbound roaming information to the SMS GW 160. . According to an embodiment of the present invention, the SMSC 130 may use the SMS message defined in the SMS communication protocol as the roaming information response message 300. For example, the report message among the SMS messages may be used as the roaming information response message 300. A more detailed description of the roaming information response message 300 will be described later with reference to FIG. 3.

The HLR 140 stores and manages the location information of the subscriber, for example, the address, the MSC address, the status information, the outbound roaming information, etc. of the VLR where the mobile terminal 10 is currently located, and requests the information. Give it to In addition, the HLR 140 stores information necessary for a subscriber to receive communication service such as subscriber additional service information in a database, and then transfers the information to the MSC 120 or the VLR, if necessary, so that the subscriber can receive the additional service. give.

Next, the roaming information request message 200 and the roaming information response message 300 according to an embodiment of the present invention will be described with reference to FIGS. 2 and 3.

2 is a diagram schematically illustrating a structure of a roaming information request message 200 according to an embodiment of the present invention. As illustrated in FIG. 2, the roaming information request message 200 includes a header 210, a mandatory parameter 230, and an optional parameter 220.

Header 210 may include a length field 212, an identifier field 214, a status field 216, and a sequence number field 218.

The length field 212 is a field in which the entire length of the roaming information request message 200 is recorded. The length field 212 may have a size of 4 octets.

The identifier field 214 is a field in which an identifier for the roaming information request message 200 is recorded. In the present invention, since the submit message is used as the roaming information request message 200 among the SMS messages, the identifier for the submit message may be recorded in the identifier field 214. The identifier field 214 may have a size of 4 octets.

The status field 216 is a field in which information about success / failure for the SMPP request is recorded. In the case of the roaming information request message 200, a value of "Null" is recorded in the status field 216. The status field 216 may have a size of 4 octets.

The sequence number field 218 is a field in which the sequence number of the message is recorded and has a size of 4 octets.

The mandatory parameter area 230 is an area in which mandatory parameters related to the short message service are recorded. For example, the mandatory parameter area 230 may include a calling number field 232 and a called number field 234.

Calling number field 232 is a field in which the phone number of the calling terminal that sent the short message is recorded.

The called number field 234 is a field in which the telephone number of the called terminal to receive the short message is recorded.

Although not shown, the essential parameter region 230 may include various fields in addition to the fields 232 and 234.

The optional parameter area 220 is an area in which optional parameters related to the short message service are recorded and may include a roaming information request field 222.

The roaming information request field 222 is a field newly defined in the optional parameter area 220 according to an embodiment of the present invention. The roaming information request field 222 has a value for distinguishing whether the mobile terminal 10, i. Is recorded. For example, if '1' is recorded in this field, it can be regarded as requesting outbound roaming information for the mobile terminal 10. If '0' is recorded in this field, the outbound roaming information for the mobile terminal 10 may not be requested. That is, the corresponding submit message may be understood as a conventional general submit message, not a submit message for requesting outbound roaming information of the mobile terminal 10.

Therefore, when the SMSC 130 receives the roaming information request message 200 from the SMS GW 160, the SMSC 130 checks the value of the roaming information request field 222. As a result of the check, when the value of the roaming information request field 222 is '1', the message is discarded without being transmitted to the mobile terminal 10. The HLR 140 requests outbound roaming information of the mobile terminal 10. As a result of the check, when the value of the roaming information request field 222 is '0', it is regarded as a conventional submit message and a corresponding process is performed.

3 is a diagram schematically illustrating a structure of a roaming information response message 300 according to an embodiment of the present invention. As shown in FIG. 3, the roaming information response message 300 includes a header 310, an essential parameter region 330, and an optional parameter region 320.

The header 310 may include a length field 312, an identifier field 314, a status field 316, and a sequence number field 318.

The length field 312 is a field in which the entire length of the roaming information response message 300 is recorded. The length field 312 may have a size of 4 octets.

The identifier field 314 is a field in which an identifier for the roaming information response message 300 is recorded. In the present invention, since the report message is used as the roaming information response message 300 among the SMS messages, the identifier for the report message may be recorded in the identifier field 314. The identifier field 314 may have a size of 4 octets.

The status field 316 is a field in which information about success / failure for the SMPP request is recorded. In the case of the roaming information response message 300, the processing status of the roaming information request message 200 may be recorded in the status field 316. That is, a value indicating that the roaming information request message 200 is 'discarded' may be recorded. This is because the roaming information response message 300 is generated in response to the roaming information request message 200 because the roaming information request message 200 is discarded by the SMSC 130. The status field 316 may have a size of 4 octets.

The sequence number field 318 is a field in which the sequence number of the message is recorded and has a size of 4 octets.

The mandatory parameter area 330 is an area in which mandatory parameters related to a short message service are recorded, and may include, for example, a call number field 332 and a called number field 334.

Calling number field 332 is a field in which the phone number of the calling terminal that sent the short message is recorded.

The called number field 334 is a field in which the telephone number of the called terminal to receive the short message is recorded.

Although not shown in the drawing, the essential parameter region 330 may include various fields in addition to the fields 332 and 334.

The optional parameter area 330 is an area in which optional parameters related to the short message service are recorded and includes a Last Failure Reason (LFR) field 322.

The final failure cause field 322 is a field defined in the existing standard, and is a field in which a value indicating a specific cause of the processing status of the roaming information request message 200 is recorded. In the present invention, the outbound roaming information of the mobile terminal 10 may be recorded in the final failure cause field 322. For example, a value of 'A' may be recorded in the final failure cause field 322 to indicate that the mobile terminal 10 is in an outbound roaming state. Alternatively, the value 'B' may be recorded in the final failure cause field 322 to indicate that the mobile terminal 10 is not outbound roaming. As such, a value A or B for discriminating whether the mobile terminal 10 is outbound roaming may be designated among reserved values. Specifically, among 0 to 255 values, it may be arbitrarily designated among 4 to 255 reserved values except for the values of 0 to 3 currently being used.

4 is a flowchart illustrating a method of providing outbound roaming information of a mobile terminal 10 according to an embodiment of the present invention.

First, the content provider 180 requests the roaming information providing apparatus 170 from the outbound roaming information of the mobile terminal 10 (S410).

The roaming information providing apparatus 170 generates a roaming information request message 200 and transmits it to the SMS GW 160 (S420). Specifically, the roaming information providing apparatus 170 records '1' in the roaming information request field 222 of the submit message and transmits it to the SMS GW 160.

The SMS GW 160 transmits the roaming information request message 200 received from the roaming information providing apparatus 170 to the SMSC 130 (S430).

The SMSC 130 checks the value of the roaming information request field 222 in the roaming information request message 200 received from the SMS GW 160. As a result, since the value of the roaming information request field 222 is '1', the SMSC 130 discards the received roaming information request message 200 (S440). Then, the HLR 140 requests outbound roaming information of the mobile terminal 10 (S450).

When the outbound roaming information of the mobile terminal 10 is received from the HLR 140 (S460), the SMSC 130 generates a roaming information response message 300 and transmits it to the SMS GW 160 (S470). Specifically, the SMSC 130 records a value indicating that the roaming information request message 200 has been 'disclosed' in the status field 316 of the report message. The outbound roaming information of the mobile terminal 10 is recorded in the final failure cause field 322 of the report message. The report message is transmitted to the SMS GW 160.

The SMS GW 160 transmits the roaming information response message 300 received from the SMSC 130 to the roaming information providing apparatus 170 (S480).

The roaming information providing apparatus 170 checks the value of the final failure cause field 322 in the roaming information response message 300 received from the SMS GW 160. Then, the checked value (for example, A or B) is transmitted to the content provider 180 (S490).

The content provider 180 receiving the outbound roaming information of the mobile terminal 10 may refer to roaming information when providing the wireless data service to the mobile terminal 10.

As described above, referring to FIG. 4, the method for providing outbound roaming information of the mobile terminal 10 according to an embodiment of the present invention has been described. In the embodiment described with reference to FIG. 4, the content provider 180 requests the roaming information providing apparatus 170 to separately request outbound roaming information of the mobile terminal 10 before providing data service to the mobile terminal 10. The example has been described. In another embodiment, the roaming information providing apparatus 170 checks outbound roaming information of the mobile terminal 10 when the content provider 180 attempts a push type data service to the mobile terminal 10. It may also transmit to the provider 180.

5 is a diagram schematically illustrating a configuration of the roaming information providing apparatus 170 according to an embodiment of the present invention. As illustrated in FIG. 5, the roaming information providing apparatus 170 may include a storage unit, a first communication unit, a second communication unit, and a processing unit.

The storage unit may store algorithms or data required for the roaming information providing apparatus 170 to operate, messages received from the outside, and the like. Such storage can be volatile, such as Erasable Programmable Read Only Memory (EPROM), Electrically Erasable Programmable ROM (EEPROM), Flash memory (Flash memory), or volatile memory such as random access memory (RAM). The memory may be implemented as a memory, a combination of a nonvolatile memory and a volatile memory, or a storage medium such as a hard disk.

The first communication unit may be responsible for transmitting and receiving data or control signals with an external device. Here, the external device may include the content provider 180. For example, the first communication unit may receive an outbound roaming information request of the mobile terminal 10 from the content provider 180 and transmit a response to the content provider 180.

The second communication unit may be responsible for transmitting and receiving data or a control signal with the SMS GW 160. For example, the second communication unit may transmit the roaming information request message 200 to the SMS GW 160 and receive the roaming information response message 300 from the SMS GW 160.

The processor connects and controls the components constituting the roaming information providing apparatus 170. For example, the processor generates a roaming information request message 200 according to a request of the content provider 180. The roaming information request message 200 controls the second communication unit to be transmitted to the SMS GW 160. In addition, when the roaming information response message 300 transmitted from the SMS GW 160 is received through the second communication unit, the processor checks the value of the final failure cause field 322 in the received roaming information response message 300. do. Then, the first communication unit is controlled to transmit the confirmed value (eg, A or B) to the content provider 180.

6 is a diagram schematically illustrating a configuration of an SMSC according to an embodiment of the present invention. As shown in FIG. 6, the SMSC may include a receiver, a transmitter, and a message processor.

The receiver may receive data or control signals from another device. For example, the roaming information request message 200 may be received from the SMS GW 160, and outbound roaming information of the mobile terminal 10 may be received from the HLR 140.

The transmitter may transmit data or control signals to other devices. For example, a signal for requesting outbound roaming information of the mobile terminal 10 may be transmitted to the HLR 140, or a roaming information response message 300 may be transmitted to the SMS GW 160.

The message processor may be responsible for processing a message received from the outside and generating a response message. For example, when the roaming information request message 200 is received from the SMS GW 160, the roaming information request field 222 is checked.

As a result, when the value of the roaming information request field 222 is '1', the received roaming information request message 200 is discarded and the HLR 140 requests the outbound roaming information of the mobile terminal 10. When the outbound roaming information of the mobile terminal 10 is received from the HLR 140, the message processing unit records a value indicating that the roaming information request message 200 is 'disclosed' in the status field 316 of the report message, and finally The roaming information response message 300 is generated by recording the outbound roaming information of the mobile terminal 10 in the failure cause field 322.

As a result of the check, if the value of the roaming information request field 222 is '0', the received roaming information message is regarded as a general submit message instead of the roaming information request message 200 and processed according to a conventional method.

Roaming information providing apparatus 170 shown in FIG. 5 and respective components constituting the SMSC shown in FIG. 6 may be implemented as modules. Herein, the term 'module' refers to a hardware component such as software or a field programmable gate array (FPGA) or an application specific integrated circuit (ASIC), and a module plays a role. However, modules are not meant to be limited to software or hardware. A module may be configured to reside on an addressable storage medium and may be configured to execute one or more processors. Thus, as an example, a module may include components such as software components, object-oriented software components, class components, and task components, and processes, functions, properties, procedures, subroutines. , Segments of program code, drivers, firmware, microcode, circuits, data, databases, data structures, tables, arrays, and variables. The functionality provided by the components and modules may be combined into a smaller number of components and modules or further separated into additional components and modules.

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. The scope of the present invention is indicated by the scope of the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalent concept are included in the scope of the present invention. Should be interpreted.

1 is a diagram illustrating a configuration of a system for providing outbound roaming information of a mobile terminal according to an embodiment of the present invention.

2 is a diagram schematically illustrating a structure of a roaming information request message according to an embodiment of the present invention.

3 is a diagram schematically illustrating a structure of a roaming information response message according to an embodiment of the present invention.

4 is a flowchart illustrating a method of providing outbound roaming information of a mobile terminal according to an embodiment of the present invention.

5 is a diagram schematically illustrating a configuration of an apparatus for providing roaming information according to an embodiment of the present invention.

6 is a diagram schematically showing the configuration of a short message service center according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

10: mobile terminal

100: mobile network

130: SMSC

140: HLR

160: SMS GW

170: roaming information providing device

180: content provider

200: roaming information request message

300: roaming information response message

Claims (12)

A Short Message Service Center (SMSC) that receives a roaming information request message requesting outbound roaming information of a mobile terminal and, in response, generates a roaming information response message including roaming information of the mobile terminal. ; And And a roaming information providing device for transmitting outbound roaming information of the mobile terminal included in the roaming information response message to a content provider. The method of claim 1, The roaming information providing apparatus generates the roaming information request message, the system for providing outbound roaming information of the mobile terminal. The method of claim 1, The roaming information request message is a submit message defined in a communication protocol for a short message service (SMS), The roaming information response message is a report message defined in the communication protocol. The method of claim 2, The roaming information request message is And a roaming information request field in which a value for discriminating whether to request outbound roaming information of the mobile terminal is recorded. The method of claim 4, wherein The short message service center, When the value for requesting outbound roaming information of the mobile terminal is recorded in the roaming information request field, the roaming information request message is discarded, and a request for outbound roaming information of the mobile terminal to the home location register is performed. System for providing outbound roaming information of the terminal. The method of claim 1, The short message service center Record the processing status of the roaming information request message in the status field of the roaming information response message; Outbound roaming information of the mobile terminal, which records outbound roaming information of the mobile terminal received from the home location register in a final failure cause field in which a value indicating a specific cause of the processing state of the roaming information response message is recorded. System to provide. Transmitting, by the apparatus for providing roaming information, a roaming information request message requesting outbound roaming information of the mobile terminal to a short message service center (SMSC); Transmitting, by the short message service center, a roaming information response message including roaming information of the mobile terminal to the roaming information providing device as a response to the roaming information request message; And And transmitting, by the apparatus for providing roaming information, outbound roaming information of the mobile terminal included in the roaming information response message to a content provider. The method of claim 7, wherein The transmitting of the roaming information request message to the short message service center may include: Sending the roaming information request message to the short message service center when there is a request from the content provider or when the content provider attempts a wireless data service to the mobile terminal. How to provide roaming information. The method of claim 7, wherein The roaming information request message is a submit message defined in a communication protocol for a short message service (SMS), The roaming information response message is a report message defined in the communication protocol. The method of claim 9, The roaming information request message is And a roaming information request field in which a value for discriminating whether to request outbound roaming information of the mobile terminal is recorded. 11. The method of claim 10, Discarding the roaming information request message when a value for requesting outbound roaming information of the mobile terminal is recorded in the roaming information request field; And Requesting a home location register for outbound roaming information of the mobile terminal. The method of claim 7, wherein The step of transmitting a roaming information response message including roaming information of the mobile terminal to the roaming information providing apparatus, Recording a processing status of the roaming information request message in a status field of the roaming information response message; Recording outbound roaming information of the mobile terminal received from the home location register in a final failure cause field in which a value indicating a specific cause of the processing state of the roaming information response message is recorded. How to provide outbound roaming information.

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