KR100875833B1

KR100875833B1 - Call sending service system and method for roaming service user

Info

Publication number: KR100875833B1
Application number: KR20070077370A
Authority: KR
Inventors: 김정근
Original assignee: 에스케이 텔레콤주식회사
Priority date: 2007-08-01
Filing date: 2007-08-01
Publication date: 2008-12-26

Abstract

A visitor mobile switching center for receiving a call setup message from a calling terminal and delivering a call to a called terminal using a temporary number of the calling terminal for call setting; And a gateway location register for storing service subscription information including a temporary number of the calling terminal, and transmitting the temporary number of the calling terminal to the visited network switch when the calling terminal is a service subscribed terminal. An outgoing service system is disclosed. According to the present invention, by providing the outgoing service to the inbound roaming users of the visited network by using the prepaid rate information of the user registered in advance in the visited network and the temporarily assigned number in the visited network, the home network may be used for the reason of the failure or other reasons. If it is not possible, you can use the prepaid billing service using the temporary number provided by the visitor network.

Description

Call sending service system and method for roaming service user}

The present invention relates to an outgoing service system and method for a roaming user. Specifically, the present invention relates to an inbound roaming user using a temporarily assigned number in a visiting network, and prepaid in the visiting network. An outgoing service system and method for providing outgoing services to inbound roaming users through a fee.

In the mobile communication service, when a mobile communication service subscriber visits overseas or visits a mobile communication service provider area of another area, the mobile communication service subscriber is moved to both subscribers in both regions by interlocking agreement and system between the mobile service providers. A service that provides a 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 who subscribes to the mobile communication service of the home network operator visits the service area of the visited network operator, the user is referred to as an inbound roaming user from the viewpoint of the visiting network.

In the mobile communication service provided to an inbound roaming user, a location registration request message is transmitted from a roaming user's mobile communication terminal to a home location register (HLR) of a visited network, and a 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, thereby providing a service to the inbound roaming user. There is a disadvantage that can not be.

The present invention for solving the above-described problems of the prior art, even if there is a failure in the HLR or mobile communication network of the home network or otherwise unable to use the home network, the location registration using the temporarily assigned number in the visiting network, visit An object of the present invention is to provide an outgoing service system and method capable of providing outgoing services through a prepaid fee in a network.

In order to achieve the above object, a call service system according to an embodiment of the present invention receives a call setup message from a call terminal, and uses a temporary number of the call terminal to transmit a call to a called terminal for call setup. Network mobile switching center; And a gateway location register for storing service subscription information including a temporary number of the calling terminal, and transmitting the temporary number of the calling terminal to the visited network switch when the calling terminal is a service subscribed terminal. Can be configured.

An outgoing service method according to an embodiment of the present invention includes: receiving a call setup message from an originating terminal at a visited network exchange; Querying the gateway location register for service subscription information including the temporary number of the calling terminal, and determining whether the calling terminal is a service subscribing terminal; Transmitting the temporary number of the calling terminal to the visited network switch if the calling terminal is a service subscription terminal; And forwarding the call to the called terminal by using the temporary number of the calling terminal at the visited network exchange to establish a call.

According to the present invention, by providing the outgoing service to the inbound roaming users of the visited network by using the prepaid rate information of the user registered in advance in the visited network and the temporarily assigned number in the visited network, the home network may be used for the reason of the failure or other reasons. If it is not possible, you can use the prepaid billing service using the temporary number provided by the visitor network.

Hereinafter, with reference to the accompanying drawings looks at in detail with respect to the preferred embodiment of the present invention.

1 is a block diagram illustrating an outgoing service system according to an embodiment of the present invention. As shown, the outgoing service system according to the embodiment receives a call setup message from the caller terminal 10, the customer center 40 and the caller terminal 10 to communicate with the caller terminal 10 through the customer computer network Visiting network server group 20, the gateway network location gateway (Gateway Location Register (GLR) 30) connecting the visited network and the home network, the home network server group that receives the call from the visited network server group 20 to set up the call (50) And 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 use the calling service at the calling terminal 10, first, a prepaid amount must be paid to the customer center 40 and the location of the calling terminal 10 must be registered in the visited network server group 20. The calling terminal 10 transmits a call setup message to the visited server group 20 to request a call.

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 call setup message of the calling terminal 10 and transmits the call to the home network server group 50. When the call is established, the VMSC 22 periodically transmits the talk time to the VSCP 21, and the VSCP 21 deducts the prepaid fee of the calling terminal 10 according to the talk time.

The home network server group 50 includes a home location register 51, a gateway mobile switching center (GMSC) 52, and a target mobile switching center (TMSC) 53. The call transmitted from the visited network server group 20 is received by the GMSC 52, and the GMSC 52 transmits and receives a call to the TMSC 53 where the destination terminal 60 is located by transmitting and receiving with the HLR 51. The called terminal 60 receives a call from the TMSC 53 and makes a call with the calling terminal 10.

2 is a flowchart illustrating a process of registering a location of a terminal of an inbound roaming user in a visited network for an outgoing service according to an embodiment of 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 register the temporary location so that only the short message is received in the visited network to the originating terminal 10 (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 there is a service subscription request by a roaming user in a prepaid fee processing method, the customer center 40 registers a prepaid fee for the amount that the roaming user has applied to the VSCP 21, and the VSCP 21 and the GLR ( 30) service subscription information is transmitted (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 transmits a relocation registration request instruction message including the temporary allocation MSISDN to the calling terminal 10 (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).

If 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 searches for a database storing service subscription information. 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 is able to make a call from the visited network.

3 is a flowchart illustrating an outgoing service method according to an embodiment of the present invention. The originating service method is based on the premise that the location registration according to the present invention described above with reference to FIG. First, the inbound roaming user of the visited network transmits a call setup message to the VMSC 22 using the calling terminal 10 which is its own terminal (S101). In one embodiment of the present invention, the VMSC 22 receives the call setup message, GLR (30) to the Initial Detection Point (IDP) message that is the billing processing information requesting the initiation of billing in the intelligent network to charge for the call To be sent). When receiving the IDP message from the GLR 30, inquiring the subscription information table of the calling terminal 10 stored in advance in the GLR 30 in the above location registration process, if there is a prepaid fee of the calling terminal 10 IDP message It is delivered to the VSCP 21 of the visited network without transferring the home network HRL (51) (S102).

When receiving the IDP message from the VSCP 21, in order to subtract the prepaid fee of the calling terminal 10 according to the usage time in the intelligent network for charging, the GLR charging request message requesting a call time report In step S103, the GLR 30 transmits the same to the VMSC 22 (S103). The VSCP 21 also delivers a continue message to the GLR 30 requesting call progress. The GLR 30 records the temporary number of the originating terminal 10 in the received progress request message and transmits it to the VMSC 22 (S104).

When the VMSC 22 receives the progress request message in which the temporary number is recorded, the calling party address of the call is changed to the temporary number of the calling terminal 10 included in the progress request message (S105). Next, the VMSC 22 transmits an IAM (Initial Address Message) message, which is initial address information for call setup, to the network where the called terminal 60 is located.

In one embodiment of the present invention, when the terminating terminal 60 is a subscriber of the overseas home network, the VMSC 22 transmits an IAM message to the GMSC 52 of the home network (S106). GMSC 52 receives the IAM message, and transmits a SRI (Sending Routing Information) message to the HLR 51 to obtain the information of the exchange in which the called terminal 60 is located (S107). Since the location of the called terminal 60 is registered in the HLR 51 receiving the SRI message, the HLR 51 requests the roaming number of the TMSC 53 to the TMSC 53 where the called terminal 60 is located. A PRN (Provide Roaming Number) message is transmitted (S108). Upon receiving the PRN message, the TMSC 53 transmits a Mobile Subscriber Roaming Number (MSRN), which is roaming number information of the TMSC 53, to the HLR 51 (S109). The HLR 51 transmits routing information including the transmitted MSRN to the GMSC 52 (S110).

The GMSC 52 transfers the call to the TMSC 53 using the transmitted routing information (S111), and the TMSC 53 transfers the call back to the destination terminal 60 to set up the call (S112). The terminating terminal 60 responds to the originating exchange VMSC 22 via the TMSC 53, thereby establishing a call between the originating terminal 10 and the terminating terminal 60 (S113). The called terminal 60 communicates with the calling terminal 10 through the set call.

In the above-described embodiment, the case where the called terminal 60 is a home network subscriber has been described, but the call procedure is the same even when the called terminal 60 is a visited network subscriber. However, unlike the GMSC 52 of the home network that receives the IAM message and delivers the call to the called terminal 60, in this case, the GMSC of the visited network receives the call and the switch of the visited network where the called terminal 60 is located. The only difference is that the call is set up by passing the call to.

Furthermore, the VMSC 22 has been requested a call time report from the VSCP 21 for billing processing in the intelligent network in step S103. Therefore, in one embodiment of the present invention, when a call is established and a call is started, the VMSC 22 periodically transmits talk time information to the VSCP 21. The VSCP 21 subtracts the prepaid fee according to the talk time, and sends a call release message to the VMSC 22 when the prepaid fee is exhausted so that the call is terminated.

As described above, according to the present invention, by providing a calling service to an inbound roaming user using a prepaid fee registered in the VSCP of the visited room and a temporary number registered in the GLR, the HLR of the home network in the process of providing the calling service and Since it does not go through the mobile communication network, it is possible to provide outgoing services to inbound roaming users even if there is a failure in the home network, and there is an advantage in that call charges can be charged according to prepaid rates.

While specific embodiments of the present invention have been illustrated and described, the technical spirit of the present invention is not limited to the accompanying drawings and the above description, and various modifications can be made without departing from the spirit of the present invention. It will be apparent to those skilled in the art, and variations of this form will be regarded as belonging to the claims of the present invention without departing from the spirit of the present invention.

The present invention relates to an outgoing service system and method for a roaming user. Specifically, the present invention relates to an inbound roaming user by registering a location using a temporarily assigned number in a visiting network, and inbound roaming user through a prepaid fee in the visiting network. It relates to an outgoing service system and method for providing outgoing services.

1 is a block diagram illustrating an outgoing service system according to an embodiment of the present invention.

2 is a flowchart illustrating each step of a location registration process in a visited network for an outgoing service according to an embodiment of the present invention.

3 is a flowchart illustrating each step of an originating service method according to an embodiment of the present invention.

Claims

A visitor mobile switching center for receiving a call setup message from a calling terminal and delivering a call to a called terminal using a temporary number of the calling terminal for call setting;

A gateway location register for storing service subscription information including a temporary number of the calling terminal, and transmitting the temporary number of the calling terminal to the visited network switch if the calling terminal is a service subscribed terminal; And

Stores prepaid fee information of the calling terminal, receives charging processing information for initiating charge for an outgoing call from the visited network switch, and receives a talk time periodically from the visited network switch when a call is set up; Calling service characterized in that it comprises a visitor service control point (Visitor Service Control Point) for releasing the call by sending a call release message to the visited network switch when the prepaid rate is deducted according to the call time by deducting the prepaid fee of the calling terminal Service system.

The method of claim 1,

And the temporary number of the calling terminal is a temporary assigned Mobile Station International ISDN Number of the calling terminal.

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Receiving a call establishment message from an originating terminal at the visited network exchange;

Querying the gateway location register for service subscription information including the temporary number of the calling terminal, and determining whether the calling terminal is a service subscribing terminal;

Transmitting the temporary number of the calling terminal to the visited network switch if the calling terminal is a service subscription terminal;

Transmitting, at the visited network exchange, billing information for initiating charge for an outgoing call to a visitor service control point;

Forwarding the call to the called terminal by using the temporary number of the calling terminal at the visited network exchange to establish a call;

Periodically transmitting a talk time to the visited network service control point at the visited network exchange when a call is established;

Subtracting a prepaid fee of the calling terminal registered in advance at the visited network service control point according to a call time; And

And transmitting a call release message to the visited network switch from the visited network service control point to release the call when the prepaid rate is exhausted.

The method of claim 5,

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