KR101000394B1 - In bound roaming advance payment service system and method thereof - Google Patents

Abstract

An inbound roaming prepaid service system and a service method thereof are disclosed. An inbound roaming prepaid service method according to the present invention includes the steps of: a roaming service control unit transmitting a message for inducing a subscription of a prepaid service to an inbound roamer; Generating, by the roaming service controller, prepaid subscriber information corresponding to the inbound roam when the inbound roam subscribes to a prepaid service; And changing, by the mobile switching center, the prepaid subscriber profile to a profile for the inbound roamer based on the prepaid subscriber information.

Inbound, Roaming, Prepaid, MSC, RSCP, Intelligent Network

Description

Inbound roaming advance payment service system and method

The present invention relates to an inbound roaming prepaid service system and a service method thereof, and more particularly, a roaming service of an inbound roaming service makes an incoming and outgoing call by a roaming service using an original mobile communication terminal, and simultaneously visits a network. The present invention relates to an inbound roaming prepaid service system and a service method thereof, in which charging of a roaming service is not charged.

Today, according to overseas roaming services, mobile subscribers such as domestic wideband code division multiple access (WCDMA) access their domestic home networks in foreign countries using their mobile communication terminals, for example, voice or video. Calling services, downloading / uploading of multimedia data, and wireless Internet services can be used.

Generally, when overseas roaming service subscriber accesses domestic home network from abroad, the number excluding international call access number (1) + country code (82) + area code (010, 019, 02, 041, etc.) except 0 + Phone number (****-####) 'and then press the call button to use the call or messaging services. Alternatively, a "+" KEY may be used as an international telephone access number in a global system for mobile telecommunication (GSM) / WCDMA network. That is, "+" + "country number" + "called number except 0" should be entered. In addition, when a foreign roaming service subscriber accesses the country's network from a foreign country, the user can use a call or a messaging service by pressing the 'region code + phone number' and then pressing the call button as in the domestic network service usage method.

As such, when accessing a home network from an overseas network, the MSC (Mobile Switching Center) of the overseas network basically analyzes the called number, and the ISUP (ISDN User Part) is sent to the home network via the international network provider network of the overseas network. It is pulled in. When a call enters the ISUP to the home network, the MSC of the home network queries the HLR (Home Location Register), which manages the subscriber location of the called number, with a MAP (Mobile Application Part) to receive a routing number. The call is connected by ISUP processing back to the destination MSC.

In general, the subscriber's mobile communication terminal number is an International Mobile Subscriber Identity (IMSI) number managed by a Subscriber Identity Module (SIM) card installed in the mobile communication terminal, and an MSISDN (Mobile) assigned to the subscriber terminal in the home network corresponding thereto. A unique identification number unique to each subscriber's mobile communication terminal by a Subscriber Integrated Service Digital Network number. In particular, the GSM / WCDMA mobile terminal can support multi-band (automatic roaming) is possible.

The SIM card, also known as a subscriber identification module, stores personal information to provide various services such as subscriber's authentication, billing, and security functions. The SIM card allows users to freely use their mobile phone in any area regardless of their mobile phone technical specifications, such as Code Division Multiple Access (CDMA) or Global System for Mobile communications (GSM). In addition, a predetermined amount of prepaid SIM card is reduced in charge every time a call is made, and can be recharged and used. The subscriber identification module for the Universal Mobile Telecommunication System (UMTS), which is a third generation mobile communication, is called a universal subscriber identity module (USIM).

On the other hand, when a person who subscribes to a roaming service from an overseas network moves to a home network (domestic network), the MSC, HLR, GLR, etc. of the home network are inbound roaming service (In Bound Roamer) to the inbound roamer. In order to provide In Bound Roaming Service, it is interworked with the mobile communication system of the overseas network.

However, in the case of general inbound roaming service, even if the signal received from or sent to the overseas network is separate, the signal received from the visited network or transmitted to the visited network is also transmitted through the overseas network, the home network of the roamer, In order to transmit and receive a signal, a charge for roaming service is charged.

Therefore, in the case of inbound roaming, in order to reduce the cost of incoming and outgoing calls in the visited network, a prepaid SIM card is purchased in the visited network separately from the telephone number granted in the home network and the visited network number is prepaid. In some cases, a method of opening and using the SIM card in a separate terminal to use for incoming and outgoing calls to the visited network may be used. In other words, the incoming and outgoing calls between the home network and the overseas network use the roaming service based on the original number, and the incoming and outgoing calls within the visiting network use the local number which is opened by purchasing a prepaid SIM card. To reduce the charges for

However, the above method requires that the roamer not only have two mobile communication terminals, a roaming service terminal using the original number and a visitor terminal equipped with a prepaid SIM card, but also the cost of purchasing a prepaid SIM card. There is an increasing problem.

The present invention has been made to solve the above problems, the roaming service of the inbound roaming service to the incoming and outgoing by the roaming service using the original mobile communication terminal, while simultaneously receiving and sending to the visited network It is an object of the present invention to provide an inbound roaming prepaid service system and a service method thereof, which prevents charging of roaming services.

Inbound roaming prepaid service system according to the present invention for achieving the above object comprises a gateway location register for receiving a profile for the inbound roam from the location register of the home network of the inbound roaming; A roaming service controller interworking with the gateway location register and generating prepaid subscriber information when the inbound roamer subscribes to a prepaid service; And a mobile switching center for changing and storing a profile for the inbound roaming based on the prepaid subscriber information generated in the roaming service control unit.

In this case, the roaming service control unit preferably transmits a minor number and a method of using the message to the inbound roamer.

Preferably, the inbound roaming prepaid service system, when the incoming signal is received by the minor number assigned to the inbound roam by the prepaid service, and transmits a message for querying the incoming subscriber to the roaming service control unit; It further includes a gateway mobile switching center.

Further, when a call path is established between the inbound roamer and the originator of the third party network, the mobile switching center may request the intelligent network call origination from the roaming service controller based on the changed profile.

In addition, when an incoming signal is received by the prepaid service to a sub-number assigned to the inbound roamer, the roaming service control unit preferably transmits an FCI message requesting recording of charging information to the mobile switching center.

On the other hand, the inbound roaming prepaid service system, the roaming service control unit transmitting a message for inducing subscription of the prepaid service to the inbound roaming; Generating, by the roaming service controller, prepaid subscriber information corresponding to the inbound roam when the inbound roam subscribes to a prepaid service; And changing, by the mobile switching center, the prepaid subscriber profile to change the profile for the inbound roamer based on the prepaid subscriber information.

Preferably, the inbound roaming prepaid service method further includes the roaming service control unit notifying the inbound roamer of a minor number available in a home network.

The inbound Romer requesting the mobile switching center for location registration; In response to the location registration request, the gateway location register receiving a profile for the inbound roamer from the home location register of the home network of the inbound roamer; Based on the received profile for the inbound roamer, the gateway location register delivering interworking information for interworking the roaming service control unit; And receiving, by the mobile switching center, a profile for the inbound roamer from the gateway location register and registering a location for the inbound roamer.

The changing of the prepaid subscriber profile may include: transmitting, by the roaming service controller, interworking information for interworking the gateway location register based on the generated prepaid subscriber information; And transmitting, by the gateway location register, a prepaid subscriber profile to the mobile switching center based on the interworking information received from the roaming service control unit.

The inbound roaming prepaid service method may further include: requesting, by the mobile switching center, an intelligent network call origination from the roaming service control unit when a preset code is received from the inbound roamer with a called number; Sending, by the roaming service control unit, a response signal to the mobile switching center to set a calling number as the minor number; And transmitting, by the mobile switching center, a call setup message using the minor number as a calling number to a terminal corresponding to the called number.

In addition, the inbound roaming prepaid service method includes: when the gateway mobile switching center receives a call setup message from the third party network with the called number as the called number, querying the called subscriber to the roaming service control unit; The roaming service control unit extracting prepaid subscriber information corresponding to the minor number and requesting a routing number from the mobile switching center; Requesting, by the roaming service control unit, from the mobile switching center to assign a routing number; And in response to the response signal received from the mobile switching center, the roaming service control unit transmitting a response signal to an incoming subscriber query to the gateway mobile switching center.

The inbound roaming prepaid service method further includes the mobile switching center transmitting an IDP (Initial Detection Point) message requesting an intelligent network call to the roaming service controller based on the changed prepaid subscriber profile. You may.

Preferably, when the call between the caller of the third party network and the roamer is terminated, the roaming service control unit further transmits a FCI (Furnish Charging Information) message requesting the recording of the charging information to the mobile switching center. Include.

In addition, in the inbound roaming prepaid service method, the gateway location register sends a routing number assignment request signal from the home location register of the roamer in response to a call setup message in which the main number transmitted from the third party network is the called number. Receiving and delivering to the mobile switching center; In response to a response signal by the mobile switching center, establishing a call path between the originator of the third party network and the roamer; And transmitting, by the mobile switching center, an IDP message for requesting an intelligent network call to the roaming service controller based on the changed prepaid subscriber profile.

Thus, the inbound roaming prepaid service system and the service method according to the present invention, while the roam of the inbound roaming service is incoming and outgoing by the roaming service using the original mobile communication terminal, and simultaneously incoming to the visited network And it is possible to reduce the cost for roaming services by not being charged for the roaming service for outgoing.

Hereinafter, an inbound roaming prepaid service system and a service method thereof according to the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram schematically illustrating an inbound roaming prepaid service system according to the present invention. Referring to the drawings, the inbound roaming prepaid service system according to the present invention is divided into a home network 100 and an overseas network 200. Here, the home network 100 refers to a domestic network when a subscriber who has subscribed to a roaming service in the overseas network 200 has moved to Korea, and the overseas network 200 refers to a home network of the roaming service subscriber. In addition, when the inbound roaming service is moved from the overseas network 200 to the home network 100, which is a self-visited network, the mobile communication service provider of the home network 100 interworks with the overseas network 200. To the roaming service subscriber 210.

The home network 100 includes a mobile switching center (MSC) 110, a gateway location register (GLR) 120, a rolling service control point (RSCP) 130, a wireless information service environment (WISE) 140, and an IP ( Information Provider (150), and Gateway Mobile Switching Cenete (GMSC). The overseas network 200 also includes a home location register (HLR) 220 and a GMSC 230.

The MSC 110, also called a mobile switching center, provides a circuit switched service to a mobile communication subscriber in association with a fixed network. That is, the MSC 110 is a device that configures an access point for user traffic between a mobile communication network and a general telephone network, and other mobile switching centers in the same or different mobile communication networks. As an additional function, the location of the mobile subscriber can be tracked to provide a mobile communication service at all times, and the call channel hand-off function can be maintained even if the location is changed.

The GLR 120, also known as a gateway location register, functions as a home location register (HLR) in the other network for roaming mobile communication terminals coming from other networks. That is, the GLR 120 receives and stores a profile for the inbound roamer 210 from the home location register 220 of the overseas network 200, which is the home network of the inbound roamer 210. Here, the home location register is a database that stores profiles of terminal information, subscription information, location information, and the like for the subscriber, and also includes the type of service and ID information for the mobile switching center. That is, the home location register stores GT (Global Title) information of a mobile switching center or a Serving GPRS Support Node (SGSN) network service node (SGRS) in which a terminal is located. It is set differently each time, and the home position register can identify the mobile switching center to which the terminal is connected by looking at the GT.

When the first call is made to the mobile terminal, the mobile switching center requests routing information to the home location register, which requests routing number assignment to the mobile switching center where the called party is located. At this time, if the called mobile switching center can receive the call, it allocates a routing number and transmits it to the home position register, and the home positioning register transmits it to the calling mobile switching center, which uses the ISUP_IAM (ISUP protocol) to the called mobile switching center. The IAM (Initial Address Message) is transmitted to call processing between the originating and terminating mobile switching center.

RSCP (130) is one of the intelligent network equipment for controlling the roaming service, also known as roaming service control unit. When the RSCP 130 is located in the visited network 100 by a person who subscribed to the roaming service in the overseas network 200 (hereinafter, the roaming service subscriber is referred to as an 'inbound roamer' from the visited network's point of view). 120) receives information such as IMSI (International Mobile Subscriber Identity), MSC GT, etc. for the inbound Romer, and transmits a text message to the inbound Romer 210 to induce the subscription of the prepaid service. When the bound roamer 210 subscribes to a prepaid service, prepaid subscriber information is generated and managed by a database.

The WISE 140 is an intelligent network equipment, which processes billing for additional services provided to an inbound roamer, stores and manages subscribers of the prepaid service according to the present invention as a database, and pays according to the prepaid service provided to the inbound roamer. It performs functions such as processing.

A service for applying automatic roaming by assigning a plurality of MSISDN numbers to one IMSI using the characteristics of a GSM / WCDMA mobile communication terminal has been developed, and a SIMN (Single IMSI Multiple Number) is one such service. That is, the SIMN service assigns a major number in the home network in response to the IMSI of the mobile communication terminal subscribed to the service, and temporarily assigns a minor number in the visiting network of the country visited by the user to apply to automatic roaming. The WISE 140 applies the SIMN service such that when the inbound roamer 210 subscribes to the prepaid service, the WISE 140 assigns a minor number and saves the charge for the roaming service using the assigned minor number. .

IP 150 is an information provider device that provides users with the information required by the user through a communication network and receives a certain fee, and here, broadcasts a request signal from the mobile switching center 110 or the roaming service controller 130. Says the device to send out.

GMSC (160, 230) is also called a gateway mobile switching center, and if the number is a network number, query the location of the subscriber of the Mobile Application Part (MAP) from the HLR and use the resulting Mobile Station Roaming Number (MSRN) It connects the call to the incoming MSC. In addition, GMSC (160, 230) if the number is the other network number may be connected to the gateway mobile switching center of the other network ISUP (ISDN User Part) connection to the incoming call from the gateway mobile switching station of the other network.

2 is a diagram illustrating an example of a subscription procedure of an inbound roaming prepaid service according to the present invention.

Referring to the drawings, when the power of the mobile communication terminal (hereinafter also referred to as a roamer) 210 of the inbound roam that has moved to the home network 100, which is the visited network, is turned on, the roamer 210 visits the visited network through the WCDMA roaming related standard. The MSC 110 requests registration of a location (S101). At this time, the MSC 110 determines whether the corresponding romer 210 is a subscriber of the home network 100 or a subscriber of the overseas network 200, and the HLR 220 of the overseas network 200 through the GLR 120. Send an UL (Update Location) message. The HLR 220 of the foreign network 200 transmits an Insert Subscriber Data (ISD) message to the GLR 120 of the home network 100 in response to the received UL message, and the GLR 120 of the home network 100. The HLR 220 of the and foreign network 200 transmits response signals to the ISD message and the UL message, respectively (S102 and S103). Through this process, the location of the Romer 210 is registered in the HLR 220 of the overseas network 200.

Meanwhile, the GLR 120 requests registration of the interworking information to the RSCP 130 in response to the ISD message received from the HLR 220 of the overseas network 200, and RSCP (130) registers the interworking information. 130 is operated in conjunction with the GLR (120) (S104). In this case, the interworking information transmitted from the GLR 120 to the RSCP 130 includes information on the IMSI, the MSC GT, and the like of the Romer 210.

In addition, the GLR 120 forwards the ISD message received from the home network 200 of the inbound roamer to the mobile switching center 110 so that the mobile switching center 110 registers the location based on the subscriber profile for the roamer 210. To complete (S105).

If the inbound roaming prepaid service according to the present invention should be pre-arranged with the mobile communication service provider of the foreign network 200, the RSCP 130 based on the interworking information received from the GLR 120, the roamer 210 It may be implemented to determine whether or not a mobile communication provider that provides a roaming service to provide a prepaid service. If the mobile communication provider of the foreign network 200 provides the prepaid service, the RSCP 130 transmits a message indicating the subscription procedure of the prepaid service to the roamer 210 through the MSC 110 to provide the roamer 210. It is preferable to induce subscription of the prepaid service (S106 to S109).

When the Romer 210 purchases a prepaid card or visits a dealer and subscribes to a prepaid service in response to a prepaid service subscription procedure message received from the RSCP 130, the Mobile Subscriber ISDN Number corresponding to the prepaid service purchased or subscribed to ), The prepaid subscriber information including the charge amount is registered in the WISE 140, the WISE 140 transmits the prepaid subscriber information to the RSCP (130) and requests registration (S110, S111).

The RSCP 130 generates a prepaid subscriber file in response to the registration request received from the WISE 140, and transmits a response signal to the WISE 140 (S112). At this time, the WISE 140 preferably transmits a response message indicating that the prepaid service is normally registered to the roamer 210 in response to the response signal received from the RSCP 130 (S113).

Meanwhile, the RSCP 130 transmits interworking information for changing the subscriber profile of the GLR 120 according to the generation of the prepaid subscriber file to the GLR 120 (S114). In this case, the interworking information transmitted by the RSCP 130 to the GLR 120 may include O-CSI (Originating-CAMEL Subscription Information) and VT-CSI (Visited-CSI) information. Accordingly, the GLR 120 generates a prepaid subscriber profile of the MSC 110 based on the interworking information received from the RSCP 130 (S115).

Preferably, the RSCP 130 may transmit a text message to the roamer 210 that the number added to the prepaid service subscribed to by the roamer 210 may be used as a minor number in the home network 100 that is the visited network. . In addition, the method of using the minor number may be transmitted to the Romer 210 as a text message (S116 to S119). As a result, the inbound roamer 210 receives a minor number available for use in the home network 100 independently of the inbound roaming service, and learns how to use the same.

3 is a diagram illustrating an example of a call origination procedure by a roamer according to the inbound roaming prepaid service according to the present invention.

 Referring to the drawing, when the roamer 210 originates a call (S201), the MSC 110 sends a message to the RSCP 130 to request an intelligent network call by the O-CSI information on the roamer 210. CAMEL Application Part) protocol is transmitted (S202). The intelligent network call origination request message may be implemented as an IDP (Initial Detection Point) message. At this time, the CAP IDP includes the called number.

The RSCP 130 requests the MSC 110 to notify the event in response to the received intelligent network call origination request, requests the IP 150 to control the announcement, and the MSC 110 to the IP 150. Connection is instructed (S203 to S205). Here, the announcement of the announcement broadcast is a comment that is added when the inbound roamer subscribes to the prepaid card service of the home network 100, which is a visiting network, and may be used to transmit the current balance.

In response to the instruction from the RSCP 130, the MSC 110 transmits an IAM (Initial Address Message) necessary for call processing and routing to the IP 150 (S206), and correspondingly to the call setup from the IP 150. An ACM (Address Complete Message) indicating that all necessary address information has been received is received (S207).

On the other hand, IP 150 transmits the announcement broadcast in response to the announcement announcement control request received from the RSCP (130), and notifies the RSCP (130) of the result of the announcement broadcast transmission (S208). In response to the announcement announcement result from the IP 150, the RSCP 130 requests the MSC 110 to stop access to the IP 150 (S209), requests a billing notification (S210), and the intelligent network. The result of the call origination request is transmitted to the CAP protocol (S211). At this time, the CON (CONNECT) message that is the result of the intelligent network call origination request transmitted by the RSCP 130 to the MSC 110 includes a called number as DRA (Destination Routing Address) information. The CON message is a message transmitted by the RSCP 130 to the originating MSC in order to connect the actual call after the caller listens to all the announcements. At this time, the AC (Apply Charge) operation before the CON is used to subtract the caller's billing in real time.

The MSC 110 proceeds to the call using the DRA information received through the CON message of the CAP protocol, and transmits the IAM to the called subscriber of the third party network 300 using the ISUP protocol, and a response signal thereof. The ACM receives the ACM from the called subscriber of the third party network 300 through the ISUP protocol (S212, S213). In addition, when the called subscriber of the third party network receives a response, an ANM (Answer Message), which is a response signal, is transmitted to the MSC 110 through the ISUP protocol (S214).

When the event occurs in response to the event notification request transmitted from the RSCP 130 to the originating MSC in step S203, the MSC 110 notifies the RSCP 130 of the event content in response to the received ANM, and also informs the charging result. Notify (S215, S216). The RSCP 130 calculates the talk time according to the notification from the MSC 110, deducts the balance from the prepaid charge amount, and requests the MSC 110 to charge the billing (S217). At this time, the charging notification request signal transmitted from the RSCP 130 to the MSC 110 includes a message for setting the MSC 110 to periodically notify the charging result to the RSCP 130.

In response to the charging notification request signal received from the RSCP 130, the MSC 110 periodically notifies the RSCP 130 of the charging result, whereby the RSCP 130 calculates the talk time from the prepaid amount and deducts the balance. Then, the charge request notification to the MSC (110) (S218, S219).

When the call is terminated with the called party of the third party network 300, the MSC 110 notifies the RSCP 130 of the event informing the end of the call (S220), the RSCP 130 calculates the call time accordingly and prepaid The balance is subtracted from the amount of money, and the MSC 110 requests the recording of the charging information (S221). At this time, the MSC 110 is defined to be uncharged in the billing data for the amount deducted from the prepaid amount in response to the billing information recording request from the RSCP 130.

In addition, the RSCP 130 sends a REL (Release) message requesting the termination of the call to the MSC 110 to the CAP protocol (S222), and accordingly, the MSC 110 transmits to the called subscriber of the third party network 300. The REL message is transmitted through the ISUP protocol (S223), and the RLC (Release Complete) message is received from the called subscriber of the third party network 300 through the ISUP protocol (S224).

In addition, the MSC 110 transmits a call termination response message for the call termination request to the RSCP 130 (S225), and transmits billing data information to the WISE 140 (S226). At this time, since the WISE 140 is configured to charge the billing data information of the inbound roamer 210, the roaming service provider does not deduct the amount deducted from the prepaid amount. That is, the WISE 140 charges the usage amount from the overseas network 200, which is the home network of the inbound roam, using the CDR used by the inbound roamer. Since it is used in a prepaid account, it cannot be billed to the overseas network 200 which is the home network of the inbound Romer. Accordingly, RSCP 130 transmits Furnish Charge Information (CAP_FCI) so that the prepaid amount according to the present invention is not repeatedly charged, and the WISE sees the information of the FCI and charges it. If the prepaid balance is exhausted, the broadcast message will be sent to the general roaming charges when the prepaid amount is used up, and in this case, WISE does not transmit the FCI so that WISE can handle the normal roaming charges. do.

4 is a diagram illustrating an example of a procedure for setting a minor number according to an inbound roaming prepaid service according to the present invention as a called number.

When the roamer 210 transmits the call (S301), the MSC 110 transmits an IDP message requesting the intelligent network call to the RSCP 130 by the O-CSI information to the CAP protocol (S302). In this case, when the roamer 210 inputs a called number and inputs a preset code (for example, '* 22', etc.) together, the called number is included in the IDP message of the intelligent network call request signal transmitted to the RSCP 130. Along with the preset code.

Based on the IDP message received from the MSC 110, the RSCP 130 generates a CON message to set the minor number assigned to the roamer 210 as the calling number so that the MSC 110 as a result of the intelligent network call origination request is generated. It transmits to (S303).

The MSC 110 sets the minor number assigned to the roamer 210 as the calling number according to the result of the intelligent network call origination request received from the RSCP 130 and uses the DRA information included in the CON message. The IAM having the minor number as the calling number is transmitted to the called party of 300 through the ISUP protocol (S304). As a result, the minor number of the roamer 210 is displayed as the calling number on the called party's terminal of the third party network 300.

 5 is a diagram illustrating an example of a procedure for receiving a minor number of an inbound roaming prepaid service according to the present invention.

When the IAM having the minor number as the called number from the third party network 300 is received by the ISUP protocol, the GMSC 160 determines whether the called number is the major number or the minor number of the roamer 210. In step 130, a SRI (Send Routing Information) message of the MAP that queries the called subscriber is transmitted (S401, S402). At this time, the SRI message includes the minor number as the called number.

The RSCP 130 extracts the inbound roaming prepaid subscriber information by using the minor number included in the SRI message, and sends a Provide Roaming Number (PRN) message requesting the routing number assignment to the MSC 110 where the prepaid subscriber is located. Transmit with MAP protocol (S403). At this time, the PRN message includes IMSI information of the inbound roaming subscriber.

The MSC 110 allocates a routing number in response to the routing number request signal, and transmits a response signal to the RSCP 130 (S404). The RSCP 130 transmits a response signal to the called party subscriber query to the GMSC 160 indicating that the called number is the minor number of the roamer 210 together with the routing number assigned by the MSC 110 (S405).

The GMSC 160 transmits an IAM message to the MSC 110 by the ISUP protocol based on the response signal received from the RSCP 130 (S406), and the MSC 110 sends an ISUP ACM message in response to the received IAM message. The GMSC 160 transmits the caller to the sender of the third party network 300 (S407 and S408). By sending and receiving such a message, a call path is established between the originator of the third party network 300 and the inbound roamer 210.

Meanwhile, the MSC 110 transmits an intelligent network call origination request signal to the RSCP 130 based on the VT-CSI information received when the roamer 210 registers the location (S409), and the RSCP 130 receives the received intelligent network. The event notification request signal and the intelligent network call progress request signal are transmitted to the MSC 110 in response to the call origination request signal (S410 and S411).

The MSC 110 transmits a call incoming request signal to the roamer 210 in response to the event notification request signal and the intelligent network call progress request signal received from the RSCP 130 (S412), and receives a response from the roamer 210. Accordingly, the event notification signal is transmitted to the RSCP 130 (S413 and S414). This series of procedures is used to deduct incoming charges for customers who have subscribed to the prepaid service in real time.

In addition, the MSC 110 transmits the ANM to the sender of the third party network 300 by the ISUP protocol through the GMSC 160 (S415 and S416).

When the call between the roamer 210 and the caller of the third party network 300 ends, the MSC 110 transmits an event notification message to the RSCP 130 (S417). At this time, since the called number to the Romer 210 is a minor number, the RSCP 130 transmits a charging information recording request message for requesting charging information to the MSC 110 to the CAP protocol, and informs the termination of the call. Is transmitted to the CAP protocol (S418, S419). Here, the charging information recording request message may be implemented as a Furnish Charging Information (FCI) message.

The MSC 110 transmits and receives a call termination response signal to the RSCP 130 after transmitting and receiving an REL message and an RLC message with an originator of the third party network 300 through the ISUP protocol (S420 to S424).

In addition, the MSC 110 stores the FCI message received from the RSCP 130 in the incoming billing data, and transmits the incoming billing data to the WISE 140.

The WISE 140 processes the amount deducted by the prepaid service so that the charge for the roaming service is not duplicated based on the FCI message contained in the incoming billing data.

6 is a diagram illustrating an example of a procedure for receiving a major number of an inbound roaming prepaid service according to the present invention.

When the originator of the third party network 300 transmits an outgoing signal that uses the main number of the roamer 210 as an incoming signal, the GMSC 230 of the overseas network 200 to which the roamer 210 belongs belongs to a third party network ( In step S501, an ISUP IAM message is received from the sender. Here, the major number refers to the original telephone number of the Romer 210.

The GMSC 230 queries the HLR 220 of the overseas network 200 for the called subscriber based on the received ISUP IAM message (S502). In this case, the query message is composed of a MAP SRI message whose destination number is the main number, since the HLR 22 of the overseas network 200 knows the location of the Romer 210 by registering the location of the Romer 210, Request assignment of a routing number to the GLR 120 (100) (S503), and the assignment request signal of the routing number is transmitted to the MSC (110) (S504).

The MSC 110 of the home network 100 allocates a routing number in response to the received routing number assignment request signal, and transmits the assigned routing number to the HLR 220 of the foreign network 200 through the GLR 120. (S505, S506).

The HLR 220 of the foreign network 200 transmits a query message for the called subscriber to the GMSC 230 in response to the response signal for the received routing number request (S507). In addition, in response to the response signal for the received routing number request, the GMSC 230 of the foreign network 200 transmits the IAM message of the ISUP protocol to the MSC 110 through the GMSC 160 of the home network 100. The MSC 110 responds to the received ISUP message of the ISUP protocol through the GMSC 160 of the home network 100 and the GMSC 230 of the overseas network 200, and the HLR 220 of the overseas network 200. ACM message of the ISUP protocol is transmitted (S508 to S512).

Meanwhile, the MSC 110 of the home network 100 transmits an IDP message to the RSCP 130 based on the received VT-CSI information when registering a location for the roamer 210 and requests an intelligent network call. (S513). At this time, the RSCP 130 requests that the call proceed to the MSC 110 so that the call proceeds without a separate intelligent network operation because the incoming call from the third party network 300 is not a call by the negative number (S514).

The MSC 110 requests the caller to the roamer 210 according to the call progress request received from the RSCP 130 (S515), and the GMSC 160 of the home network 100 according to the reception response of the roamer 210. And transmitting the ANM of the ISUP protocol to the caller of the third party network 300 through the GMSC 230 of the foreign network 200 (S516 to S519).

When the call between the originator and the roamer 210 of the third party network 300 is terminated, the roamer 210 and the first through the GMSC 160 of the home network 100 and the GMSC 230 of the overseas network 200 are processed. The REL message of the ISUP protocol and the RLC message of the ISUP protocol are transmitted and received between the senders of the three-way network 300, and accordingly, the MSC 110 generates charging data and transmits it to the WISE 140 (S520 to S526). At this time, since the WISE 140 does not have FCI information in the received billing data, the billing is made to the provider of the inbound roaming service by performing a general billing process.

Although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the specific embodiments described above, and the present invention is not limited to the specific embodiments of the present invention without departing from the spirit of the present invention as claimed in the claims. Anyone skilled in the art can make various modifications, as well as such modifications are within the scope of the claims.

1 is a diagram schematically illustrating an inbound roaming prepaid service system according to the present invention.

2 is a diagram illustrating an example of a subscription procedure of an inbound roaming prepaid service according to the present invention.

3 is a diagram illustrating an example of a call origination procedure by a roamer of an inbound roaming prepaid service according to the present invention.

4 is a diagram illustrating an example of a procedure for setting a minor number of an inbound roaming prepaid service according to the present invention as a called number.

5 is a diagram illustrating an example of a procedure for receiving a minor number of an inbound roaming prepaid service according to the present invention.

6 is a diagram illustrating an example of a procedure for receiving a major number of an inbound roaming prepaid service according to the present invention.

Claims (14)

Transmitting, by the roaming service controller, a message for inducing subscription of a prepaid service to an inbound roamer; Generating, by the roaming service controller, prepaid subscriber information corresponding to the inbound roam when the inbound roam subscribes to a prepaid service; Transmitting, by the roaming service control unit, interworking information for interlocking a gateway location register based on the prepaid subscriber information; Transmitting, by the gateway location register, the subscriber profile change information to the mobile switching center based on the received interworking information; And Generating, by the mobile switching center, a prepaid subscriber profile corresponding to the inbound roamer. The method of claim 1, The roaming service control unit further comprises the step of notifying the inbound roam a minor number available in the home network. The method according to claim 1 or 2, The inbound roamer requesting a location registration from the mobile switching center; In response to the location registration request, the gateway location register receiving a profile for the inbound roamer from a home location register of the home network of the inbound roamer; Based on the received profile for the inbound roamer, the gateway location register delivering interworking information for interworking the roaming service control unit; And Receiving, by the mobile switching center, a profile for the inbound roamer from the gateway location register and registering a location for the inbound roamer. delete The method according to claim 1 or 2, Requesting an intelligent network call from the roaming service control unit when the preset code is received from the inbound roamer with a called number; Sending, by the roaming service control unit, a response signal to the mobile switching center to set a calling number as the minor number; And And transmitting, by the mobile switching center, a call setup message using the minor number as a calling number to a terminal corresponding to the called number. The method according to claim 1 or 2, When the gateway mobile switching center receives a call setup message from the third party network with the minor number as the called number, querying the roaming service controller for a called subscriber; The roaming service control unit extracting prepaid subscriber information corresponding to the minor number and requesting a routing number from the mobile switching center; Requesting, by the roaming service control unit, from the mobile switching center to assign a routing number; And And in response to the response signal received from the mobile switching center, the roaming service control unit transmitting a response signal to an incoming subscriber query to the gateway mobile switching center. The method of claim 6, And transmitting, by the mobile switching center, an intelligent network call origination request message requesting an intelligent network call origination to the roaming service control unit based on the changed prepaid subscriber profile. The method of claim 6, And when the call between the caller of the third party network and the roamer is terminated, the roaming service control unit transmitting a charging information recording request message to the mobile switching center requesting recording of the charging information. Inbound roaming prepaid service method. The method according to claim 1 or 2, In response to a call setup message with a major number sent from a third party network as a called number, the gateway location register receiving a routing number assignment request signal from the home location register of the roamer and forwarding it to the mobile switching center; In response to a response signal by the mobile switching center, establishing a call path between the originator of the third party network and the roamer; And And transmitting, by the mobile switching center, an intelligent network call origination request message requesting an intelligent network call origination to the roaming service controller based on the changed prepaid subscriber profile. A gateway location register to receive a profile for the inbound Romer from a location register of a home network of an inbound Romer; A roaming service controller interworking with the gateway location register and generating prepaid subscriber information when the inbound roamer subscribes to a prepaid service; And And a mobile switching center configured to receive the information for changing the profile of the inbound roamer from the gateway location register based on the prepaid subscriber information generated by the roaming service control unit to generate and store a prepaid subscriber profile. Inbound roaming prepaid service system. The method of claim 10, The roaming service control unit is an inbound roaming prepaid service system, characterized in that for transmitting to the inbound roam a minor number and how to use the message. The method according to claim 10 or 11, wherein Inbound roaming prepaid, characterized in that it further comprises a gateway mobile switching station for transmitting a message for querying the called subscriber to the roaming service control unit when the incoming signal is received by the minor number assigned to the inbound roaming by the prepaid service. Service system. The method according to claim 10 or 11, wherein When a call route is established between the inbound roamer and the originator of the third party network, the mobile switching center requests an intelligent network call origination from the roaming service controller based on the changed profile. . The method according to claim 10 or 11, wherein When the incoming signal is received at the minor number assigned to the inbound roam by the prepaid service, the roaming service control unit transmits a billing information recording request message to the mobile switching center requesting recording of the billing information. Bound roaming prepaid service system.

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