KR20110060351A - How to provide a return notification message service and home location register for the same - Google Patents

Abstract

The present invention relates to a method for providing a return notification message service for providing a return notification message upon returning home from overseas roaming, and a home location register for the same. The method for providing a return notification message service in a communication system according to the present invention includes: A receiving step of receiving a location registration request; A checking step of updating location information of the mobile terminal and confirming that the mobile terminal has returned to the country after roaming abroad; And a sending step of transmitting a return notification message to the mobile terminal.

Overseas roaming, returning home, notification, notification, SMS, home locator, home network, visiting network

Description

METHOD FOR PROVIDING HOMECOMING NOTIFICATION MESSAGE SERVICE AND HOME LOCATION REGISTER THEREFOR}

The present invention relates to an overseas roaming service, and more particularly, to a method for transmitting a return notification message when an overseas roaming subscriber returns to Korea and a home location register for the same.

With the development of mobile communication technology, mobile communication subscribers can be provided with mobile communication service in the same way as in home network by bilateral agreement and system interworking between mobile operators when visiting overseas. In particular, recently, 3G communication service has been started, and as the user's terminal can be used as it is abroad without renting or changing the terminal, the use of overseas roaming service is increasing.

In response to the increased use of such overseas roaming services, additional services related to this have been developed and provided. Typically, as an overseas arrival notification service, when a mobile subscriber moves from a home network to an overseas visitor network and attempts to register a location, the mobile subscriber subscribes an SMS message to the people designated by the mobile subscriber. . Therefore, it is possible to avoid the hassle of having to make a phone call to inform acquaintances such as family members or friends who have arrived abroad and their acquaintances and expensive international call charges caused by such a phone call.

As such, an additional service linked to an overseas roaming service has been developed and provided. However, when a roaming subscriber who has roamed overseas in Korea enters the country again, a service for notifying the roaming subscriber of the related matters is not developed. For example, domestic WCDMA systems currently support both circuit-switched and packet-switched networks, but some GSM systems in foreign countries do not support packet-switched networks. Since it is converted and used, the terminal should be restored to its original state when returning home, but if it is not recognized, there is a possibility that normal data service cannot be used when returning to Korea. Therefore, there is a need for a method that can automatically guide these precautions when the overseas roaming subscriber returns to Korea.

The present invention has been proposed to solve the above problems, a method of providing a return notification message service for transmitting a guide message related to returning home network to a corresponding roaming subscriber when a roaming subscriber roaming into a visited network returns to the home network. The purpose is to provide a home location register.

Other objects and advantages of the invention will be described below and will be appreciated by the practice of the invention. Further, objects and advantages of the present invention can be realized by the means and the combination shown in the appended claims.

According to an aspect of the present invention, a method for providing a return notification message service in a communication system includes: a receiving step of receiving a location registration request from a mobile terminal; A checking step of updating location information of the mobile terminal and confirming that the mobile terminal has returned to the country after roaming abroad; And a sending step of transmitting a return notification message to the mobile terminal.

In addition, according to another aspect of the present invention for achieving the above object, a home location register for providing a return notification message service, the location registration request receiving unit for receiving a location registration request for a specific mobile terminal from the exchange; A location registration processing unit which performs location registration update processing of the mobile terminal according to the location registration request; A determination unit that determines whether the mobile terminal returns to the country after roaming based on a location registration update processing result in the location registration processing unit; And a message transmission request unit requesting transmission of a return notification message to the mobile terminal according to the determination result of the determination unit.

The present invention as described above, by recognizing this automatically when the overseas roaming subscribers return to the country by transmitting a guide message to be careful when returning to the domestic, to prevent the service dissatisfaction that may occur when the subscriber returns to the country in advance In addition, it is also advantageous to provide useful information providing services to subscribers by promptly delivering information such as domestic breaking news.

The foregoing and other objects, features and advantages of the present invention will become more apparent from the following detailed description of the present invention when taken in conjunction with the accompanying drawings, in which: There will be. In the following description, well-known functions or constructions are not described in detail since they would obscure the invention in unnecessary detail. Hereinafter, a preferred embodiment 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 communication network to which a return notification message service according to an embodiment of the present invention is applied.

Referring to FIG. 1, the communication network according to the present embodiment includes a home network 110 and a visited network 130, and subscribers of the home network 110 roam to the visited network 130 to provide a communication service. Receive and return to the home network 110 again. The visit network 130 is an overseas network.

In FIG. 1, the mobile terminal 120 is a communication terminal having a voice call, a video call, a text message transmission, and a global roaming function. In this embodiment, the mobile terminal 120 is a terminal roaming to the visited network 130 as a terminal of a subscriber to the home network 110.

Referring to FIG. 1, the home network 110 includes a gateway location register (GLR) 111, a home location register (HLR) 113, and a mobile switching center (MSC) 115. And an intelligent network 117. A wireless access network (access network, base station, base station controller, etc.), a message center, etc. are included together, but a description thereof will be omitted here.

The gateway location register 111 is a device that serves as a gateway for location registration processing of the mobile terminal 120 roaming from the home network 110 to the visited network 130, and is a virtual home location register for the visited network 130. (HLR) and the home network 110 performs the function of a virtual visited location register (VLR). The gateway location register 111 performs protocol conversion for each service provider's protocol for roaming service between mobile communication service providers.

Specifically, when the roaming mobile terminal 131 performs location registration in the visited network 130, the gateway location register 111 requests a location registration request from the exchange 133 of the visited network 130. Receives a location registration request to the home location register 113 of the home network 110 to accommodate the roaming mobile terminal 131, and downloads the subscriber profile from the home location register 113 to the roaming mobile terminal ( 131 to the exchange 133 on the side. That is, the gateway location register 111 performs the function of the home location register of the roaming mobile terminal 131 with respect to the visited network 130.

The home location register 113 manages the profile of the mobile subscriber as well as the current location information of the mobile terminal. When the location registration request for the mobile terminal is received, the home location register 113 updates the location information of the mobile terminal, and transmits a location deletion message for deleting the subscriber profile to the exchange side where the mobile terminal was previously located, The subscriber's profile is downloaded and registered to the exchange side where the mobile terminal is currently located.

Specifically, when the location registration request for the roaming mobile terminal 120 is received from the gateway location register 111 as described above, the home location register 113 is the gateway location as the location information of the roaming mobile terminal 133. The information of the register 111 is registered and the subscriber profile is lowered to the gateway location register 111. On the other hand, the home location register 113 transmits a location deletion message for deleting the subscriber profile to the exchange side located in the home network 110 before the roaming mobile terminal 120 registers the location in the visited network 130.

The home location register 113 serves to provide routing information for the roaming mobile terminal 120 by using the stored location information and the subscriber profile of the mobile terminal. That is, when the home location register 113 receives the destination location query for the roaming mobile terminal 120 from the switch 115 of the home network 110, the home location register 113 makes a destination location query to the gateway location register 111 and responds thereto. When receiving the message, the switch 115 responds to the incoming location information.

As such, the home location register 113 does not store the information of the visited network 130 as the location information for the roaming mobile terminal 120, and has only the information about the gateway location register 111, and thus the home network ( When the call is sent from the 110 to the roaming mobile terminal 120, the home location register 113 unconditionally makes a call location query to the gateway location register 111.

On the other hand, when the roaming mobile terminal 120 roaming into the visited network 130 returns to the home network 110 again, the roaming mobile terminal 120 attempts to register the location again in the home network 110 and the home network 110. The location registration request message is sent to the exchange 115 of. Accordingly, the switch 115 of the home network 110 requests a location registration to the home location register 113 of the roaming mobile terminal 120.

The home location register 113 registers a new location, requests a deletion of location registration to the gateway location register 111 previously given a subscriber profile as described above, and requests a new location registration. The exchange 115 lowers the subscriber profile. In this case, the home location register 113 requests the gateway location register 111 to delete the location registration, unlike the general location registration procedure, so that the mobile terminal 120 performing the current location registration based on this is the home network 110. Judging by the return to.

When the home location register 113 determines that the roaming mobile terminal 120 has returned to the home network 110, the MAP (notifying that the roaming mobile terminal 120 has registered the location in the home network 110) is determined by the intelligent network 117. Mobile Application Part) message.

The intelligent network 117 is connected to an existing communication network and provides an extended service. The intelligent network 117 includes a service control point (SCP) and a service switching point (SSP). In the present invention, when the intelligent network 117 receives the MAP message indicating that the roaming mobile terminal 120 has registered the location in the home network 110, as described above, the home network register 113, returns to the home including various guide items A notification SMS message is created and transmitted to the mobile terminal 120 through the message center. In this case, the return notification SMS message may include various kinds of information such as news information or work to be done when returning from overseas roaming.

In the embodiment of FIG. 1, the intelligent network 117 is used as an apparatus for transmitting a return notification SMS message. However, the intelligent network 117 does not necessarily need to be used, and may be performed in a new independent device, or the home location register 113. May be performed in logic included in

2 is a flowchart illustrating a location registration procedure of a roaming mobile terminal roaming into a visited network according to an embodiment of the present invention.

Referring to FIG. 3, when the mobile terminal 120 roams from the home network 110 to the visited network 130, when a location registration requirement such as power-on occurs, the mobile terminal 120 moves to the switch 133 of the visited network 130 through the wireless access network. Transmitting the location registration request (Update_Location) (S201), the switch 133 of the visited network 130 receives the location registration request subscribers of the home network 110 based on the identification number (MSISDN) of the roaming mobile terminal 120 After confirming that the location registration request (Update_Location) to the gateway location register 111 of the home network 110 (S203). The MSISDN is composed of a country code (CC), a network code (NDC) and a subscriber number (SN), and a country code and a network code can be used to distinguish a country and a business operator.

The gateway location register 111 that receives the location registration request from the exchange 133 of the visited network 130 sends a location registration request to the home location register 113 of the home network 110 that accommodates the roaming mobile terminal 120. Update_Location) is transmitted (S205). At this time, the location registration request includes the information of the gateway location register 111, not the exchange 133 information of the visited network 130.

Then, the home location register 113 updates the location information of the roaming mobile terminal 120 (i.e., registers the information of the gateway location register 111 as the location information), and inquires the profile of the corresponding roaming subscriber to the ISD. (Insert Subscriber Data) message is transmitted to the gateway location register 111 (S207).

Upon receiving the ISD message including the subscriber profile, the gateway location register 111 transmits the received ISD message to the exchange 237 on the roaming mobile terminal 120 side (S309). At this time, the gateway location register 111 stores and manages the exchange 133 information of the visited network 130 as the location information of the roaming mobile terminal 120. The exchange 237 of the visited network 230 registers and stores the subscriber profile included in the ISD in the visited location register.

As described above, when the mobile terminal 120 of the home network 110 roams to the visited network 130, the home location register 113 of the home network 110 includes a gateway location register that is not exchanger information of the visited network 130. The information of 111 is stored as location information, and the exchange information of the visited network 130 is registered in the gateway location register 111. Accordingly, when another subscriber of the home network 110 sends a call to the roaming mobile terminal 120, or when the roaming mobile terminal 120 sends a call to the subscriber of the home network 110, the gateway location register 111 is always used. Via.

3 is a signal flow diagram illustrating a method for providing a return notification message service according to an embodiment of the present invention.

As shown in FIG. 3, when the mobile terminal 120 roaming to the visited network 130 moves to the home network 110, the mobile terminal 120 starts location registration according to the location movement. Therefore, the mobile terminal 120 transmits a location registration request (Update_Location) to the switch 115 of the home network 110 (S301).

The exchanger 115 of the home network 110 receiving the location registration request from the mobile terminal 120 transmits a location registration request (Update_Location) to the home location register 113 managing the mobile terminal 120 (S303). ).

Upon receiving the location registration request, the home location register 113 performs a location information update procedure of the mobile terminal 120. First, the exchange information, that is, a signal point (specifically, a visit, to which the mobile terminal 120 was previously located) is performed. It checks the GT (Global Title) of the location register (VLR) and requests deletion of the location information to the exchange side of the corresponding signal point, and requests the location information update to the exchange side currently located.

At this time, since the mobile terminal 120 has returned from the visited network 130 to the home network 110, the home location register 113 has the gateway home location register as the switch information, that is, the signal point where the mobile terminal 120 was previously located. The information of 111 is registered. Therefore, the home location register 113 requests the location information deletion (Cancel_Location) to the gateway home location register 111 and receives the response (Cancel_Location_Ack) accordingly (S305 and S307).

However, the home location register 113 recognizes that the mobile terminal 120 has returned to the home network 110 after roaming because the location location requester 111 is a gateway location register 111 that is not an exchange of the home network 110. Accordingly, the mobile terminal 120 transmits a MAP message indicating that the mobile terminal 120 has returned to the home network 110 after roaming to the intelligent network 117 (S309). In addition, the home location register 113 transmits the location registration response including the subscriber profile to the switch 115 of the home network 110 to complete the location registration procedure (S313).

Meanwhile, the intelligent network 117 receiving the MAP message creates a return notification SMS message including various guide items according to the return to the country, and transmits it to the message center (S311). In this case, the return notification SMS message may include various kinds of information such as news information or work to be done when returning from overseas roaming.

The message center receiving the return notification SMS message transmits the incoming location query message to the home location register 113 of the mobile terminal 120 using the called party's telephone number included in the return notification SMS message (S315). The receiving location response message is received (S317).

The message center receiving the called location response message transmits the return notification SMS message to the mobile terminal 120 via the switch 113 in which the mobile terminal 120 is located according to the routing information included in the called location response message. (S319).

After roaming to the visited network 130 as described above, the mobile terminal 120 returning to the home network 110 receives the return notification SMS message including various instructions at the same time as it arrives at the home network 110. The communication failure that may occur while returning to the home network 110 may be easily solved.

4 is a block diagram showing the configuration of a home location register according to an embodiment of the present invention.

As shown in FIG. 4, the home location register 113 according to the present embodiment includes a location registration request receiving unit 401, a location registration processing unit 403, a subscriber information DB 405, and a domestic return determining unit 407. And a message transmission request unit 409.

The location registration request receiving unit 401 receives a location registration request for the mobile terminal 120 from the switch 115 or the gateway location register 111 when the mobile terminal 120 is powered on or moves. do.

When the location registration request is received by the location registration request receiving unit 401, the location registration processing unit 403 performs location information updating procedure for the mobile terminal 120 where the location registration request is received. Specifically, the location registration processing unit 403 checks the exchange information, that is, the signal point GT (Global Title), in which the mobile terminal 120 was previously located, in the subscriber information DB 405, and goes to the corresponding exchange side. A request is made to delete the location information, and the exchange side, which is currently located, drops the subscriber profile and requests the location information to be updated.

At this time, when the mobile terminal 120 is returned to the home network 110 from the visited network 130, the previous switch information of the mobile terminal 120 stored in the subscriber information DB 405 is the gateway home location register 111 ) Information. Therefore, the location registration processing unit 403 requests the location information deletion (Cancel_Location) from the gateway home location register 111 and receives a response (Cancel_Location_Ack) accordingly.

The domestic return determining unit 407 determines whether the mobile terminal 120 has returned to the country after roaming abroad based on the location registration processing result performed by the location registration processing unit 403. Specifically, the domestic return determining unit 407 returns to the home country after overseas roaming when the location registration processing unit 403 requests the deletion of the location information to be the gateway location register 111 rather than the exchanger of the home network 110. I judge it.

When the message transmission request unit 409 determines that the mobile terminal 120 returns to the home country after roaming abroad as a result of the determination by the domestic return determining unit 407, the mobile terminal 120 roams to the intelligent network 117. After that, it transmits a MAP message indicating that it has returned to the home network 110. In other words, request to send the return notification SMS message.

As such, when the location registration request for the mobile terminal is received, the home location register 113 deletes the location information of the mobile terminal when the gateway location register is not a domestic exchange. After returning to the country, it is determined that the initial location registration is performed, and the smart network 117 requests the transmission of the return notification SMS message.

In the above-described embodiment, the home location register 113 determines that the mobile terminal has returned to Korea when the point of deleting the location information of the mobile terminal is the gateway location register, but according to the embodiment, the home location register 113 visits the home network 110. The network 130 may be linked directly or through other equipment without interlocking through the gateway location register. Therefore, the home location register 113 does not determine that the mobile terminal has returned to the domestic country only when the point of deleting the location information of the mobile terminal is the gateway location register. In addition, the home location register 113 returns home even if the location information deletion point is an overseas exchange. Judging by Preferably, when the location information deletion point is not a domestic exchange, the home location register 113 may determine that the mobile terminal returns to the country after roaming.

As described above, the method of the present invention may be implemented as a program and stored in a recording medium (CD-ROM, RAM, ROM, floppy disk, hard disk, magneto-optical disk, etc.) in a computer-readable form.

While the specification contains many features, such features should not be construed as limiting the scope of the invention or the scope of the claims. Also, the features described in the individual embodiments herein can be implemented in combination in a single embodiment. Conversely, various features described herein in a single embodiment may be implemented in various embodiments individually or in a suitable subcombination.

It is to be understood that, although the operations have been described in a particular order in the figures, it should be understood that such operations are performed in a particular order as shown, or that a series of sequential orders, or all described operations, . In some circumstances, multitasking and parallel processing may be advantageous. In addition, it should be understood that the division of various system components in the above-described embodiments does not require such division in all embodiments. The above-described program components and systems can generally be implemented as a single software product or as a package in multiple software products.

The present invention described above is capable of various substitutions, modifications, and changes without departing from the technical spirit of the present invention for those skilled in the art to which the present invention pertains. It is not limited by the drawings.

1 is a diagram schematically illustrating a configuration of a communication network to which a return notification message service according to an embodiment of the present invention is applied.

2 is a flowchart illustrating a location registration procedure of a roaming mobile terminal roaming into a visited network according to an embodiment of the present invention.

3 is a signal flow diagram illustrating a method for providing a return notification message service according to an embodiment of the present invention.

4 is a block diagram showing the configuration of a home location register according to an embodiment of the present invention.

Claims (7)

A method for providing a return notification message service in a communication system, A receiving step of receiving a location registration request from a mobile terminal; A checking step of updating location information of the mobile terminal and confirming that the mobile terminal has returned to the country after roaming abroad; And And a returning step of transmitting a return notification message to the mobile terminal. The method of claim 1, The checking step, (a) identifying a signal point for requesting deletion of location information of the mobile terminal; And (b) confirming that the signaling point is not a domestic exchange. The method of claim 2, In step (b), And confirming that the signal point is a gateway location register. A home location register that provides a return notification message service, A location registration request receiving unit which receives a location registration request for a specific mobile terminal from an exchange; A location registration processing unit which performs location registration update processing of the mobile terminal according to the location registration request; A determination unit that determines whether the mobile terminal returns to the country after roaming based on a location registration update processing result in the location registration processing unit; And And a message transmission request unit requesting transmission of a return notification message to the mobile terminal according to the determination result of the determination unit. The method of claim 4, wherein The determination unit, And if the signal point requesting the deletion of the location information of the mobile terminal is not a domestic exchange, the location registration processor determines that the mobile terminal has returned to the country after roaming. The method of claim 5, The determination unit, And if the signal point is a gateway location register, determining that the mobile terminal has returned to the country after roaming. The method according to any one of claims 4 to 6, The message transmission request unit, Requesting transmission of a return notification message to the mobile terminal through an intelligent network.

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