KR20090013512A

KR20090013512A - Message transmission system and method for roaming service user

Info

Publication number: KR20090013512A
Application number: KR1020070077734A
Authority: KR
Inventors: 김정근
Original assignee: 에스케이 텔레콤주식회사
Priority date: 2007-08-02
Filing date: 2007-08-02
Publication date: 2009-02-05
Also published as: KR100907170B1

Abstract

A message transmission system and a method thereof for a roaming user capable of transmitting a message within a prepaid limitation by using temporary number are provided to transmit the message through a terminal of an inbound roaming user and to allocate the temporary number of the roaming user terminal. A visitor mobile switching center(22) receives an origination message from a calling terminal(10). The origination message is transmitted to a gateway location register(30) with the called terminal(60). It changes the sending terminal number stored in the origination message received from the visited network switch into the child number and the gateway location register delivers message to the short message service center of the home network. A visitor network service control point(21) stores charge prepaid information about the calling terminal. The charge prepaid is struck a balance in the message transfer by the calling terminal.

Description

Message Transmission System and Method for Roaming Service User}

The present invention relates to a message transmission system and method for a roaming user. According to the present invention, a temporary number is assigned to an inbound roaming service user terminal to register a location in a visiting network and register a prepaid fee. Thus, even if there is a defect in the system of the home network, the inbound roaming user can transmit the message at the prepaid rate limit using the temporary number provided by the visited network.

In the mobile communication service, when a mobile communication service subscriber visits overseas or visits a mobile communication service provider area in another region, the subscribers of the mobile communication service can be connected to both subscribers in both regions by the cooperation between the mobile communication service providers and the system. A service that provides a mobile communication service is called a roaming service.

In the conventional roaming service, mobile communication service providers of home networks and visiting networks have to establish an international roaming gateway system and an international roaming billing settlement system through bilateral agreements. When a user subscribed to the home network operator's mobile communication service visits the service area of the visited network operator, the user is referred to as an inbound roaming user from the viewpoint of the visited network.

In the mobile communication service provided to the inbound roaming user, a location registration request message is transmitted from the roaming user's mobile communication terminal to the home location register (HLR) of the visited network, and the location registration is requested. After confirming that the user is a subscriber of the roaming contracted home network operator through the user identification number, requesting the user's information to the home network operator's HLR via the international roaming gateway system and registering the international roaming service to the home network operator's HLR. By doing so.

In this case, however, if the home network HLR or the mobile network of the home network fails or cannot be used for other reasons, the home network HLR cannot provide the roaming user's information to the visited network HLR and provide services to the inbound roaming user. There is a disadvantage that can not be.

The present invention has been made to solve the problems described above, in the present invention, when the inbound roaming user terminal is unable to update the location in the home network due to a system defect of the home network, the temporary number is assigned to the inbound roaming user terminal In addition, by providing a location registration of the terminal in the visited network, an inbound roaming user to provide a system and method for transmitting a message through the terminal.

The present invention relates to a message transmission system for a roaming user. The system includes: a Visitor Mobile Switching Center for receiving an outgoing message from a calling terminal and sending the outgoing message to a gateway location register for sending to the called terminal; And the gateway location register for changing the calling terminal number stored in the outgoing message received from the visited network switch to a temporary number and delivering the message to a short message service center of a home network.

The present invention also relates to a message transmission method for a roaming user, comprising: (a) receiving, by a visiting network exchange, an originating message from an originating terminal; (B) transmitting an outgoing message received by the visited network exchange to a gateway location register; (C) changing a calling terminal number stored in an outgoing message received by the gateway location register to a temporary number; And (d) the gateway location register forwarding the message to a home network.

According to the present invention, when the inbound roaming user terminal fails to update the location in the home network due to a system defect of the home network, the temporary number is assigned to the inbound roaming user terminal, and the location registration of the inbound roaming user terminal in the visited network is performed. It is possible to register the prepaid fee by the user's application. Thus, even if there is a defect in the system of the home network, the inbound roaming user can transmit the message at the prepaid rate limit using the temporary number provided by the visited network.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. However, the present invention is not limited by the following examples.

1 is a diagram illustrating a message transmission system for a roaming user according to the present invention. The message transmission system according to the present invention includes a call center 10, a visitor terminal 10 communicating with a caller terminal 10 through a customer computer network, and a visited network server group 20 for receiving a message from the caller terminal 10. ), A gateway location register (GLR) 30 connecting the visited network to the home network, a home network server group 50 for receiving a message from the visited network server group 20, and transmitting the message to the called terminal; (60).

The calling terminal 10 is a subscriber of the home network and is a terminal of an inbound roaming user who is visiting the visiting network. In order to transmit a message from the calling terminal 10, a temporary number is assigned from the visited network server group 20 through a prepaid fee service subscription application to the customer center 40, and the location of the calling terminal 10 should be registered. When the location registration is completed, a message such as a short message may be transmitted to the called terminal 60 through the calling terminal 10.

The visited network server group 20 includes a visitor service control point (VSCP) 21, a visitor mobile switching center (VMSC) 22, and a visitor short message service center. Center; VSMSC) 23.

The VMSC 22 receives the message transmitted by the originating terminal 10 and transmits an IDP (Initial Detection Point) message to the VSCP 21 requesting the initiation of charging in the intelligent network to charge the message transmission. The VMSC 22 also forwards the message to the GLR 30 for transmission of a short message sent by an inbound roaming user.

After receiving the IDP message from the VMSC 22, the VSCP 21 transmits an event report request message requesting a report of an event and a call progress request message requesting a call progress to the VMSC 22 through the GLR 30. do. In addition, after receiving an event report indicating a successful message transmission from the VMSC 22, the fee for the successful outgoing message is subtracted from the registered prepaid fee, and the message is received by the destination terminal 60 through the GLR 30 to the VMSC 22. Send a call progress request message requesting to send

The GLR 30 plays a role of relaying a message between the VMSC 22 and the VSCP 21. When the GLR 30 receives an IDP message from the VMSC 22, the GLR 30 is stored in advance in the GLR 30 in the above-described location registration process. The subscription information table of the calling terminal 10 is inquired, and when there is a prepaid fee registered in the calling terminal 10, the IDP message is transmitted to the VSCP 21 of the visited network instead of the home network. In addition, the GLR 30 changes the calling number stored in the short message received from the VMSC 22 to the temporarily assigned MSISDN, stores it, and forwards it to the SMSC 52 of the home network.

The home network server group 50 includes a home location register 51, an SMSC 52, and a home mobile switching center (HMSC) 53. The short message transmitted from the visited network server group 20 is received by the SMSC 52, and the SMSC 52 transmits and receives the HLR 51 to obtain routing information, and to the HMSC 53 where the called terminal 60 is located. Pass the message.

Hereinafter, a message transmission process for a roaming user according to the present invention will be described with reference to FIGS. 2 and 3.

2 is a flowchart illustrating a location registration process of an inbound roaming user in a visited network for message transmission according to the present invention.

First, when the calling terminal 10 of the roaming user transmits a location registration request message to the VMSC 22 (S1), the VMSC 22 transmits a location update message to the GLR 30 (S2) and the GLR 30. ) Transmits the received location update message to the HLR 51 of the home network to which the inbound roaming user is subscribed (S3).

At this time, the HLR 51 of the home network or the system of the other home network is defective and cannot be updated, so the GLR 30 receives a location update rejection message from the HLR 51 or receives no response from the HLR 51. If not (S4), the GLR 30 transmits a location update rejection message to the VMSC (22) (S5).

In the present invention, the number of times that the GLR 30 receives the location update rejection message from the HLR 51 or the number of times that there is no response from the HLR of the home network with respect to the transmitted location update message, that is, the number of location update failures is counted (S6). It is configured to If the counted number of failures is more than a predetermined number of times, the GLR 30 transmits a subscriber information message necessary for temporary location registration to the VMSC 22 (S7). In this case, the subscriber information message required for temporary location registration includes a roaming user's profile.

Thereafter, the VMSC 22 uses the subscriber information message received from the GLR 30 to perform temporary location registration for the originating terminal 10 so that only short message reception is allowed in the visited network (S8). The GLR 30 sends a short message to the VSMSC 23 so as to transmit a service subscription guide message including a question about whether to register a location and prepaid fee service to the calling terminal 10 that is temporarily allowed to receive a short message. After making a request for transmission (S9), the VSMSC 23 transmits a service subscription guide message to the calling terminal 10 accordingly (S10).

At this time, the roaming user may apply for location registration and prepaid fee service subscription to the customer center 40 (S11). For example, when a service subscription request is made by a roaming user in a prepaid fee processing manner, the customer center 40 registers a prepaid fee for the amount of the roaming user's application in the VSCP 21, and the VSCP 21 and the GLR. The service subscription information is transmitted to 30 (S12, S13). In this case, the service subscription information includes an International Mobile Station Identity (IMSI), an existing Mobile Station International ISDN Number (MSISDN), and a temporary assigned MSISDN. The temporary allocation MSISDN is a number temporarily assigned to register the location in the visited network with respect to the calling terminal 10.

Thereafter, the VSCP 21 and the GLR 30 store the service subscription information received from the customer center 40 in a table form (S14, S15). Meanwhile, the GLR 30 makes an SMS transmission request to the VSMSC 23 (S16) and instructs the originating terminal 10 to register the location with the temporary allocation MSISDN in the visited network. The message is transmitted (S17). Upon receiving the location registration request indication message, the originating terminal 10 attempts to relocate the location by transmitting a location registration request message to the VMSC 22 (S18). As such, when there is a location registration request by the calling terminal 10, the VMSC 22 transmits a location update message to the GLR 30 (S19).

When the GLR 30 searches the database where the service subscription information is stored, when the received location update message is a location update request by a roaming user who subscribed to the location registration and prepaid fee service, the GLR 30 sends the subscriber information message required for location registration to the VMSC. Transmit to 22 (S20). In this case, the subscriber information message required for location registration includes a subscriber profile of the roaming user and billing processing information. The billing processing information is information necessary for processing the prepaid billing through the VSCP 21 when the roaming user uses the mobile communication service.

Thereafter, the VMSC 22 registers the location of the originating terminal 10 in the visited network by using the subscriber information message received from the GLR 30 (S21). When the location registration (S21) is made, the originating terminal 10 can transmit a message in the visited network.

3 is a flowchart illustrating a message transmission process according to the present invention. The message transmission process is based on the assumption that the location registration according to the present invention described above with reference to FIG. 2 is performed.

When the inbound roaming user located in the visited network sends a message such as a Short Message Service (SMS) through his originating terminal 10, the originating message is delivered to the VMSC 22 (S101). In one embodiment of the present invention, the VMSC 22 receives an outgoing message and sends an IDP (Initial Detection Point) message to the GLR 30 requesting initiation of charging in the intelligent network to charge for the message transmission. . When the GLR 30 receives the IDP message, in the above location registration process, the subscription information table of the calling terminal 10 stored in advance in the GLR 30 is inquired, and there is a prepaid fee registered in the calling terminal 10. The IDP message is transmitted to the VSCP 21 of the visited network instead of the home network (S102). Upon receiving the IDP message, the VSCP 21 of the visited network transmits an event report request message requesting an event report and a call progress request message requesting a call progress to the VMSC 22 through the GLR 30 (S103, S104).

Thereafter, the VMSC 22 delivers the message to the GLR 30 for the transmission of the short message sent by the inbound roaming user, and the GLR 30 changes the calling number stored in the transmitted short message to the temporarily assigned MSISDN. After storing it, it is transferred to the SMSC 52 of the home network (S105).

When the SMSC 52 of the home network receiving the message reports the message delivery to the VMSC 22 (S106), the VMSC 22 transmits the message delivery report message to the calling terminal 10 and sends the message. Notify the delivery (S107), and also through the GLR 30 to the event report to the VSCP 21 (S108) to inform the success of the message transmission.

At this time, the VSCP 21 receiving the event report subtracts the fee for the successful outgoing message from the registered prepaid fee (S109), and transmits the message to the destination terminal 60 through the GLR 30 to the VMSC 22. The requesting call progress request message is transmitted (S110).

Thereafter, the SMSC 52 of the home network receives routing information for message transmission from the HLR 51 to the destination terminal 60 (S111), and sends a message to the destination terminal 60 according to a normal short message transmission process. Transmit (S112 to S114).

The embodiment according to the present invention is not limited to the above-described embodiments, and various alternatives, modifications, and changes can be made without departing from the scope of the present invention.

According to the present invention, an inbound roaming user can transmit a message at a prepaid rate limit using a temporary number provided by the visited network even when the system of the home network is defective.

1 is a diagram illustrating a message transmission system according to the present invention.

3 is a flowchart illustrating a message transmission process according to the present invention.

Explanation of symbols on the main parts of the drawings

10: calling mobile terminal 20: visited network

30: GLR 40: Customer Center

50: home network 60: called mobile terminal

Claims

A Visitor Mobile Switching Center for receiving an outgoing message from a calling terminal and sending the outgoing message to a gateway location register for sending the outgoing message to a called terminal; And

And the gateway location register for changing the calling terminal number stored in the outgoing message received from the visited network switch to a temporary number and delivering the message to a short message service center of a home network.

The method of claim 1,

And the temporary number is a mobile station international ISDN number temporarily assigned to the calling terminal in a visited network.

The method of claim 1,

Stores the prepaid rate information for the calling terminal, and further includes a visitor service control point that deducts the prepaid fee when the message is sent by the calling terminal.

The visited network exchange sends an IDP (Initial Detection Point) message to the gateway location register requesting the initiation of charging in the intelligent network to charge a message transmission,

The gateway location register stores the prepaid fee service subscription information of the calling terminal and, when receiving the IDP message from the visited network exchange, inquires the prepaid fee service subscription information, and if there is a registered prepaid fee, the IDP message. Transmitting the message to the visited network service control point.

The method of claim 3, wherein

The visited network service control point, upon receiving an event report indicating a successful message origination from the visited network exchange, subtracts a fee for a successful outgoing message from a registered prepaid fee.

(A) the visiting network exchange receiving an outgoing message from the calling terminal;

(B) transmitting an outgoing message received by the visited network exchange to a gateway location register;

(C) changing a calling terminal number stored in an outgoing message received by the gateway location register to a temporary number; And

And (d) the gateway location register delivering the message to a home network.

The method of claim 5, wherein

And the temporary number is a mobile station international ISDN number temporarily assigned to the calling terminal in the visited network.

The method of claim 5, wherein

After step (a) above,

Sending, by the visited network exchange, an Initial Detection Point (IDP) message to the gateway location register requesting to start charging in the intelligent network to charge a message transmission;

The gateway location register further comprises the step of querying the prepaid rate service subscription information of the calling terminal and transmitting the IDP message to the visited network service control point when there is a registered prepaid rate. .

The method of claim 5, wherein

After step (d) above,

Sending, by the visited network switch, an event report message indicating a successful message transmission to the visited network service control point; And

At the visited network service control point, subtracting a charge for a successful outgoing message from a registered prepaid fee.