KR20090010542A - Method and system for charging the terminated call for the out-bound roamed pps(pre-paid service) mobile - Google Patents

Abstract

A system for charging a terminated call for an out-bound roamed PPS mobile and a method thereof are provided to process a communication fee for a receiving call using a PPS. In case the initial location update message of the mobile terminal is received from the GLR(Gateway Location Register)(264), an HLR(Home Location Register)(262) stores the included location information in very first location update message. According to HLR is the pre-paid service and global roaming service sign up or not, the caller identifier corresponding to the mobile terminal is extracted and it provides for GLR. The originating exchange(206) obtains the mobile subscriber roaming number(MSRN) about the mobile terminal in the outbound call request receiving from HLR. The routing route to the visit switch(256) is set up by using the obtained mobile subscriber roaming number. In case the initial sensing point(Initial Detection Point) message is received from the visit switch through the set up routing route, the SCP(Service Control Point)(212) provides the prepayment charge service(Pre-Paid Charging Service) about the corresponding incoming call.

Description

Method and system for handling incoming call charging for international roaming mobile terminal {Method and System for Charging the Terminated Call for the Out-Bound Roamed Pre-Paid Service Mobile}

The present invention relates to a billing processing method and system for a prepaid mobile communication service, and more particularly, when a mobile terminal subscribed to a domestic prepaid mobile communication service is roamed internationally, an incoming call charging process for the mobile terminal. It relates to a method and a system thereof.

Recently, with the development of mobile communication technology, various additional services are provided through not only basic communication services but also intelligent networks.

The term intelligent network was first used in 1984 in Bellcore for the Public Subscriber Telecommunication Network.

In mobile communication networks, North American wireless access code division multiple access (CDMA) is a standard called WIN (Wireless Intelligent Network), and European wireless access GSM and WCDMA is a CAMEL (Customized Application of Mobile Enhanced Logic) standard. It has evolved into a standard.

Intelligent network standardization is actively progressed by ITU, ETSI, and Bellcore. In the United States, standardization activities are actively underway led by ETSI.

The intelligent network is largely composed of Service Control Point (SCP), Intelligent Peripheral (IP), Service Management Point (SMP), Service Creation Environment (SCE), and Service Switching Point (SSP).

Here, SCP is a device that manages intelligent network service logic and data and controls all processes of intelligent network service.

IP is a special resource management device that provides functions such as voice guidance, voice recognition, dual tone multi frequency (DTMF) collection, and text-to-speech (TTS) required for intelligent network services.

SMP is a device that manages other intelligent network components such as SCP and IP that make up the intelligent network.

SCE is a device that provides a service creation environment such as editors, utilities, and simulators necessary for developing intelligent network service logic used in SCP.

The SSP not only provides network service subscribers with network access or exchange functions for call setup, but also provides full access to intelligent network-related devices.

To this end, the SSP has the ability to detect requests for intelligent network service requests, to communicate with other physical entities, including SCP, Intelligent Peripheral (IP), and to respond to commands sent from other physical entities. Must include.

Functionally, the SSP includes a call control function (CCF), a call control agent function (CCAF), and a service switching function (SSF).

In particular, an intelligent network refers to a network environment in which a new service can be applied to a mobile communication network without changing a software of a mobile communication exchange (MSC).

However, since most of the supplementary services provided in the conventional wired and wireless communication switching network are installed in the exchange, it was necessary to change the exchange software to add a new supplementary service.

In this environment, every time you add a new service, you need to modify the currently running exchange software, which can affect the currently available service.

In addition, when the exchange method and communication standards are different for each communication provider, there is a problem that the service development company has to develop a service with different interworking standards for various exchanges.

In other words, if the exchange manufacturer does not inform the service developer of the exchange interworking specification, it is difficult to develop a new service.

It is the intelligent network that emerged to solve the above problems.

Currently, the intelligent network provides an open network structure that can actively respond to changes in communication technology and network environment, enabling the rapid development of new services as well as minimizing the impact on the existing switching network when adding / modifying / deleting new services. .

In addition, the intelligent network is not only easy for the actual user to directly control his own service, but also has an advantage of convenient control and operation of the system and services by configuring a centralized additional service network.

Typical intelligent network services include 080 clover service, representative phone service (1588, 1577), lifetime number service, pre-paid mobile phone service (PPS), two-number service, caller ID and prohibition service, and designated number discount plan. , Rate capping, and location-based differential charging.

In particular, the prepaid mobile phone service is a representative intelligent network service that purchases a prepaid (PP) card with a certain calling limit and uses the mobile phone service for the amount.

In general, when a subscriber with a prepaid card uses a prepaid mobile phone service using his or her own terminal, the mobile phone service can be used in the same manner as a general subscriber, and also using a feature code as another mobile terminal. You can use mobile phone service.

In addition, the subscriber of the prepaid mobile phone service can check his or her prepaid card balance through a mobile communication network or an internet network, and may replenish the balance through a predetermined procedure.

Recently, as the third generation mobile communication, represented by WCDMA, aiming for the world's single call, has become commercially available, the third generation mobile communication subscribers can roam their mobile terminals automatically without using a separate overseas roaming procedure.

In general, in the case of an overseas roaming service, a charge is provided for a call service provided not only for an outgoing terminal that makes a call but also for an incoming terminal that receives an incoming call.

However, in the related art, when a subscriber subscribed to a domestic prepaid mobile communication service roams abroad, a method of providing a call service using a prepaid fee to a domestic mobile communication service provider has not been provided.

In addition, conventionally, when a subscriber subscribed to a domestic prepaid mobile communication service roams abroad, there is a problem in that a method for performing real-time charging for the corresponding mobile communication subscriber is not provided in the domestic mobile communication system.

That is, in the related art, billing information for a communication service provided to an overseas roaming mobile terminal is collected for a predetermined time in an outbound roaming network, and the collected billing information is provided to a home network, thereby real-time for the outbound roaming prepaid service subscriber. There was a problem that can not be charged.

An object of the present invention for solving the problems of the prior art as described above is to use the prepaid rate when the mobile terminal subscribed to the prepaid mobile communication service of the domestic WCDMA network is out-bound roaming It is to provide a method for handling incoming call charging for the terminal.

Another object of the present invention is to provide a call processing procedure capable of providing an incoming billing service in real time to an outbound roaming prepaid subscriber station.

Another object of the present invention is to provide a billing processing system capable of easily providing an overseas roaming service to a mobile terminal subscribed to a prepaid mobile communication service in a global roaming mobile communication environment.

Other objects of the present invention will be readily understood through the following description of the embodiments.

In order to achieve the above object, according to an aspect of the present invention, a method for charging an incoming call to a mobile terminal roaming internationally in a home network is disclosed.

According to an embodiment of the present invention, an incoming call charging method for an international roaming mobile terminal in a home network may receive subscriber information corresponding to the mobile terminal when receiving a location update message of the mobile terminal through a roaming network. Extracting and transmitting subscriber information to the roaming network;

Receiving a call setup request message from an originating terminal connected to the home network, obtaining a route information to a visited exchange connected to the mobile terminal and setting up an incoming call according to the obtained route information; When the mobile terminal is subscribed to a prepaid service, a prepaid information transmitting step of calculating a callable time corresponding to the prepaid amount and transmitting the same to the visited exchange; And a prepaid billing processing step of receiving a received call history information provided to the mobile terminal from the visited exchange at the end of a call, calculating a call charge, and subtracting the calculated call charge from the prepaid amount. .

According to another aspect of the present invention, a method for providing a prepaid service for an international roaming mobile terminal in an intelligent network service control device connected to a home network is disclosed.

According to an embodiment of the present invention, a method for providing a prepaid service for an international roaming mobile terminal in an intelligent network service control apparatus may include an initial request for initiating prepaid service charging for the mobile terminal from a visited exchange through a preset international signaling network. Receiving an initial detection point message; When the mobile terminal is subscribed to a prepaid service, checking whether there is a sufficient prepaid amount corresponding to a service to be provided to the mobile terminal; As a result of the checking, if there is a sufficient prepaid amount, calculating a callable time for each service type corresponding to the prepaid amount and providing the callable time to the visited exchange; And when the call history information of the mobile terminal is received from the visited exchange, calculating a call rate corresponding to the call history information, and subtracting the calculated call rate from the prepaid amount. Shall.

In the above description, only the method of charging an incoming call to an international roaming mobile terminal in a home network and a method of providing a prepaid service for an international roaming mobile terminal in an intelligent network service control device connected to a home network are described. Recorded as a program consisting of instructions, the program may be provided as a recording medium that can be read by the electronic device.

According to an embodiment of the present invention, an incoming call prepaid service providing system for an international roaming mobile terminal is provided.

In accordance with an aspect of the present invention, an incoming call prepaid service providing system for an international roaming mobile terminal stores location information included in the initial location update message when receiving an initial location update message of the mobile terminal from a gateway location register. A home location register that extracts subscriber information corresponding to the mobile terminal and provides the gateway location register according to whether a prepaid service and an international roaming service are subscribed to the gateway location register; Upon receipt of an outgoing call request, a mobile subscriber roaming number (MSRN) for the mobile terminal is obtained from the home location register, and a routing path to the visited exchange is established using the obtained mobile subscriber roaming number. Outgoing exchange; And an intelligent network service control device that provides a pre-paid charging service for the incoming call when receiving an initial detection point message from the visited exchange through the established routing path. It is characterized by.

The present invention provides an advantage of providing a method for processing incoming call charging for a mobile terminal using a prepaid fee when the mobile terminal subscribed to a prepaid mobile communication service of a domestic WCDMA network is out-bound roaming. There is this.

In addition, the incoming call prepaid billing method according to the present invention provides the VT-CSI information to the visited exchange in the location registration process of the roaming destination terminal, the intelligent network of the home network according to the received VT-CSI By interworking the call and having the intelligent network perform the incoming call charging process for the prepaid subscriber, there is an advantage of providing more convenient international roaming service to the prepaid subscriber.

In addition, the present invention has the advantage of providing a call processing procedure capable of providing the incoming billing service in real time for the outbound roaming prepaid subscriber station.

In addition, the present invention has the advantage of providing a billing processing system that can easily provide the overseas roaming service for the mobile terminal subscribed to the prepaid mobile communication service in the global roaming mobile communication environment.

In addition, the present invention is effective to provide an effective billing service for prepaid subscribers by using the message defined in the standard without changing the existing hardware.

In particular, the present invention can provide a convenient prepaid service to domestic prepaid subscribers by enabling the mobile terminal subscribed to the prepaid mobile communication service of the home network in the outbound roaming network without a separate roaming service subscription procedure. Rather, it can be expected to boost the prepaid service market.

Other objects of the present invention will be readily understood through the following description of the embodiments.

Hereinafter, a preferred embodiment of an incoming call charging processing method and system for an overseas roaming mobile terminal according to the present invention will be described in detail with reference to the drawings.

1 is a system configuration diagram illustrating a location update procedure using a gateway location register according to the present invention.

In more detail, FIG. 1 illustrates a case where a home network HLR (Home Location Register, hereinafter referred to as 'HLR') receives a location update message from an outbound roaming mobile terminal, and visits subscriber data corresponding to the mobile terminal. It shows the procedure of delivering to the switching network of the visited network through the Gateway Location Register (hereinafter referred to as 'GLR') located in a network.

Here, the exchange is composed of a switch and a visitor location register (hereinafter referred to as 'VLR').

In general, the HLR is a subscriber's master database and maintains basic information related to the subscriber. For example, the HLR may maintain subscriber telephone number, subscriber address information, network access control information for security and authentication of subscriber, location registration information of subscriber, movement information between heterogeneous systems, that is, roaming information, and service profile information of subscriber. .

The gateway location register is a virtual home location register located in the visited network. The GLR may store information of a home network subscriber roamed into a visited network, and perform location management for the corresponding roaming subscriber.

At this time, the home network may not recognize the presence of the GLR. Thus, the interface between the HLR and the GLR follows the interface specification defined between the HLR and the landing location register, and the interface between the GLR and the VLR follows the interface specification defined between the VLR and the HLR.

The GLR performs a function of storing subscriber data obtained from the HLR while performing a location update procedure.

For example, when an HLR of a home network receives a location registration request message originated by a subscriber terminal roaming in a visited network, the HLR sends an Insert Subscriber Data Message including subscriber data of a roaming mobile terminal. Can be transmitted to the switching network of the visited network.

At this time, the GLR stores the corresponding subscriber information until receiving a Cancel Location Message from the HLR, and the stored subscriber information is used for the HLR emulation function.

Here, the HLR emulation function means performing the location management procedure only in the visited network. More specifically, when the location update request received from the mobile terminal can be processed by the Location Update Screening Function without interworking with the associated HLR, the HLR emulation function may be performed, from which time the GLR Behaves like the subscriber's HLR.

The location update screening function is used to determine whether the HLR needs to be notified of the received location update request message, and the GLR may perform the above-described HLR emulation function if there is an IMSI record for the subscriber. have.

It should be noted, however, that even in the case where the subscriber's IMSI record exists in the GLR, in certain cases, the GLR may inform the associated HLR of the location update request message received. Here, the detailed description of the specific case will be omitted since it is not an essential element for describing the idea disclosed in the present invention.

2 is a network diagram illustrating a method for providing a prepaid service for an international roaming mobile terminal according to an embodiment of the present invention.

In more detail, when the home network 100 prepaid service subscriber is roamed internationally (Out-Bound Roaming), it is a network configuration for explaining how to charge the incoming call using the prepaid amount in real time.

2, a communication network according to an embodiment of the present invention is largely referred to as a home network 200 and an out-bound roaming network 250, hereinafter simply referred to as a roaming network. It may be configured as.

The home network 100 according to the present invention includes a wireless access network 204, a switch / VLR 206, an IPGS 208, a domestic operator signal network 210, an intelligent network service control device 212, a billing server. 214, HLR 216.

In the following description, the exchange / VLR 206 to which the calling terminal 202 is connected will be referred to as the calling exchange, and the exchange / VLR 256 to which the outbound roaming destination terminal 252 is connected is called a visiting exchange.

The roaming network 250 may include a radio access network 254, a visited exchange 256, an IPGS 258, an overseas signal network 260, an HLR 262, and a gateway location register 264.

The communication between the home network 100 and the roaming network 250 may be performed using the international circuit 220 and the international signal network 230.

Here, the International Circuit Network may use the Integrated Service Digital Network (ISDN) User Part (ISP) protocol standard defined by the ITU-T, and the switch 206 of the home network 200 and the roaming network 250 through the ISUP protocol. And 256) may transmit or receive voice and data over the established line, as well as control procedures related to setting / changing / releasing the communication line.

In particular, the present invention may provide a location update procedure for an outbound roaming mobile terminal through the GLR-Mobile Application Part (GLR-MAP) protocol defined in the 3rd Generation Partnership Project (3GPP) standard.

For example, when the visited exchange 256 receives a location update request message from an international roaming mobile terminal 252 (hereinafter referred to as a called terminal), the location update message received through the overseas signal network 260. Is transmitted to the GLR 264, and the GLR 264 transmits the received location update message to the home network through the international signal network 230 when there is no subscriber profile for the called terminal 252. 200 may transmit to the HLR 216.

At this time, the HLR 216 of the home network 200 extracts a subscriber profile corresponding to the called terminal 252 from a predetermined database, and inserts an Insert Subscriber Data Message including the extracted subscriber information. It transmits to the GLR 264 through the domestic operator signal network 210 and the international signal network 230.

The GLR 264 registers the received subscriber profile with the roaming network 250 and then transmits an Insert Subscriber Data Acknowledge Message to the HLR 216 of the home network 200.

When the HLR 216 of the home network 200 receives the subscriber information insertion response message, the HLR 216 transmits the location update response message to the roaming network 250.

In addition, the intelligent network service control device 212 according to an embodiment of the present invention is an intelligent network service through a CAP (Customized Applications for Mobile.Network Enhanced Logic (CAMEL) Application Part) protocol defined in the 3GPP standard specification, where intelligent The network service includes prepaid service-it can perform the real-time billing process for the subscriber.

In general, the intelligent network service control device 212 is a core equipment of the intelligent network, and manages service logic and data for various intelligent network services. That is, the intelligent network service control device 212 may actually perform the intelligent network service scenario of the mobile communication operator. In particular, the intelligent network service control device 212 is capable of interworking with other network resources using the SS7-based and IP-based intelligent network protocols WIN, CAMEL and the like.

In the intelligent network service control apparatus 212 according to an embodiment of the present invention, the called terminal 252 connected to the roaming network 150 by using the control message defined in the CAP protocol is prepaid service of the home network 200. Visit exchange 256 may be notified that it has been subscribed to.

In addition, the intelligent network service control device 212 transmits the call history information of the destination terminal 252 from the visited exchange 256 to a predetermined control message defined in the CAP protocol, for example, a call information report message. Can be received via-.

The intelligent network service control apparatus 212 may calculate a call rate by using the received call history information and subtract the calculated rate from the prepaid amount.

According to another embodiment of the present invention, the intelligent network service control device 212 transfers the received call history information to the charging server 214, and the charging server 214 is a call received from the intelligent network service control device 212 The call charge is calculated using the breakdown information, and the calculated charge can be subtracted from the prepaid amount.

Thereafter, the charging server 214 may provide the intelligent network service control device 212 with a prepaid amount of money, hereinafter, referred to as a prepaid balance.

In addition, the intelligent network service control device 212 according to the present invention provides the prepaid balance to the visited exchange 256 using a control message defined in the CAP protocol, for example, a Charging Charging Information Message. can do.

3 is a flowchart illustrating a first location update procedure for an international roaming mobile terminal according to an embodiment of the present invention.

More specifically, FIG. 3 is a flowchart illustrating a method of performing an initial location update procedure through the roaming network 250 when the mobile terminal 252 subscribed to the prepaid service of the home network 200 is internationally roamed. to be.

In the following description, the exchange / VLR 256 to which the outbound roaming mobile terminal 252 is connected will be referred to as a visited exchange for convenience of description.

Referring to FIG. 3, the mobile terminal 252 transmits a location update request message to the visited exchange 256 located in the roaming network 250 (S302).

If the subscriber information for the mobile terminal 252 does not exist in the roaming network 250, the visited exchange 256 transmits the received location update request message to the gateway location register 264 (S304).

The gateway location register 264 stores the VLR number and the exchange number included in the received location update message, and then the location location message including the gateway location register number, where the gateway location register number is the VLR number, and the exchange number. To the HLR 216 of the home network 100 (S306).

The HLR 216 may determine whether the mobile terminal 252 that requested the location update is subscribed to the international roaming service.

If the mobile terminal 252 is subscribed to the international roaming service, the HLR 216 stores the gateway location register number and the exchange number included in the received location update message, and then inserts subscriber data (S308 through S308 to be described later). S314) is performed.

In particular, when the mobile terminal 252 is subscribed to the prepaid service, the HLR 216 according to the present invention may transmit CAMEL trigger information to the visited exchange 256 through a subscriber data insertion request message.

The CAMEL trigger information may include information about a call processing procedure for each service type, roaming permission, basic call state model (BCSM) transition, BCSM event, and detection point (DP).

Here, the call processing procedure for each service type may include at least one of O-CSI, D-CSI, VT-CSI, SMS-CSI, and GPRS-CSI.

O-CSI and D-CSI are used for real-time billing for voice and video outgoing calls, and VT-CSI is used for real-time billing for voice and video incoming calls. In addition, SMS-CSI is used for real-time charging for short messages and GPRS-CSI is used for real-time charging for packet data calls.

The BCSM event is a disconnect event that means that the call channel set up at the calling party or called party is disconnected, a busy event that means that the called party is busy, and there is no response from the called party. It may include a NoAnswer Event, a Route Select Failure Event, which means that the called party is in an unreceivable area, and an Answer Event, which means that the call setup to the called party is completed. Can be.

In addition, the BCSM event according to another embodiment of the present invention may further include a balance shortage event indicating that the available talk time corresponding to the prepaid amount is exhausted.

For example, the visited exchange according to an embodiment of the present invention may receive call time information corresponding to a prepaid amount from the home network, and the visited exchange may exceed or exceed the talk time provided to the called party. The BCSM event report message including the low balance event may be transmitted to the home network before a predetermined time.

When the home network receives a low balance event, the home network may terminate the preset call or add a call charge added to the called terminal to the charge of the calling terminal through a predetermined control procedure.

The HLR 216 may send the CAMEL trigger information to the visited exchange 256 through a Subscriber Subscriber Data Message.

The visited exchange 256 may transmit the basic call state model (BCSM) event triggered according to the received CAMEL trigger information to the intelligent network service control device 212 using a BCSM event report message.

When the gateway location register 264 receives the subscriber subscriber data message including subscriber information of the mobile terminal 252, where the subscriber information may include CAMEL trigger information, The subscriber information is stored in the predetermined recording area (S308), and the received subscriber data insertion request message is transmitted to the visited exchange 256 (S310).

At this time, the visited switch 256 stores the received intelligent network subscriber information in a predetermined recording area, and when a call processing corresponding to the CAMEL trigger information occurs, the intelligent network service control device 212 located in the home network 200. Send trigger information.

When the gateway location register 264 receives an Insert Subscriber Data Acknowledge Message from the visited exchange 256 (S312), the gateway location register 264 transmits the received response message to the HLR 216 (S314).

The HLR 216 generates and transmits a location update response message to the gateway location register 264 in response to the location update request message received in step 306 (S316).

The gateway location register 264 transmits the received location update response message to the visited switchboard 256 (S318), and the visited switchboard 256 is a wireless access network to which the mobile terminal 252 is connected, where the wireless access network is a base station controller. And a location update response message received through the mobile station 252, including the base station (S320).

Through the initial location update procedure, the roaming network 250 may acquire subscriber information about the international roaming mobile terminal 252.

4 is a flowchart illustrating a second and further location update procedure for an international roaming mobile terminal according to an embodiment of the present invention.

More specifically, FIG. 4 illustrates a procedure of processing a location update request message received from the mobile terminal 252 in the roaming network 250 when the initial location update procedure for the international roaming mobile terminal 252 is completed. It is a flowchart showing.

Particularly, in the present embodiment, when the mobile terminal 252 attempts to register the location of the newly visited VLR (hereinafter referred to as 'first VLR 400') within the roaming network 250, a procedure of performing location update is performed. This will be described in detail.

In the following description, the VLR holding the latest location registration information for the mobile terminal 252 will be referred to as a 'second VLR 410'.

Referring to FIG. 4, when the first VLR 400 receives a location update request message from an international roaming mobile terminal 252, the first VLR 400 transmits the received location update request message to the gateway location register 264 (S402). .

The gateway location register 264 stores the VLR number and the exchange number included in the received location update request message when the subscriber information for the mobile terminal 252 is present (S404), and the location information deletion request message ( Cancel Location Message) is transmitted to the second VLR 410 (S406).

Here, the location information deletion request message is a message instructing to delete the previously registered location information and subscriber information from the database.

When the gateway location register 264 receives a Cancel Location Acknowledge Message from the second VLR 410, the gateway location register 264 extracts subscriber information corresponding to the corresponding mobile terminal 252. In operation S410, the subscriber data insertion request message including the extracted subscriber information is transmitted to the first VLR 400.

After storing the received subscriber information, the first VLR 400 transmits the subscriber data insertion response message to the gateway location register 264 (S412).

When the gateway location register 264 receives the subscriber data insertion response message, the gateway location register 264 transmits the location update response message to the first VLR 400 (S414).

As described above, when the international roaming mobile terminal 252 completes the initial location update procedure, the location update procedure to be performed thereafter is performed internally in the roaming network 250 without interworking with the HLR 216 of the home network 200. It can be seen that it is performed as. That is, it can be seen that the gateway location register 264 located in the roaming network 250 performs the function of the virtual HLR 216.

5 is a flowchart illustrating a procedure for deleting location information according to an embodiment of the present invention.

In more detail, FIG. 5 illustrates that the international roaming mobile terminal 252 leaves the roaming network 250 having the gateway location register 264 and performs a location update procedure with the VLR 500 of the home network 200. In this case, the procedure for deleting the location information of the mobile terminal 252 stored in the roaming network 250 by the HLR 216 of the home network 200 is a flow chart showing.

When the international roamed mobile terminal 252 returns to the home network 200, the mobile terminal 252 transmits a location update request message to the newly visited home network VLR 500 through the connected home network 200 base station. .

If there is no subscriber information for the mobile terminal 252, the home network VLR 500 transmits the received location update request message to the HLR 216 (S502).

When the HLR 216 receives the location update request message, the HLR 216 stores the VLR number and the exchange number included in the received location update request message, and checks whether the corresponding mobile terminal 252 is an international roaming terminal.

When the mobile terminal 252 is in an international roaming state, the HLR 216 transmits a location information deletion request message to the gateway location register 264 of the roaming network 250 (S504).

When the gateway location register 264 receives the location information deletion request message, the VLR 510 deletes the subscriber information for the mobile terminal 252 and maintains the last location registration information for the mobile terminal 252. In step S506, the location information deletion request message received is transferred.

When the VLR 510 located in the roaming network 250 receives the location information deletion request message, the VLR 510 deletes the subscriber information for the mobile terminal 252 and then transmits a location information deletion response message to the gateway location register 264. (S508).

The gateway location register 264 transmits the received location information deletion response message to the HLR 216 located in the home network 200 (S510).

When the HLR 216 receives the location information deletion response message from the roaming network 250, the HLR 216 converts the state of the mobile terminal 252 into a home network connection state and then converts the subscriber information for the mobile terminal 252. The subscriber data insertion request message is transmitted to the home network VLR 500 (S512).

The home network VLR 500 stores the received subscriber information and then transmits a subscriber data insertion response message to the HLR 216 (S514).

The HLR 216 generates a location update response message and transmits it to the home network VLR 500 (S516).

6 is a flowchart illustrating a call processing procedure for an international roaming mobile terminal according to an embodiment of the present invention.

More specifically, FIG. 6 illustrates that when the called terminal 250 subscribing to the prepaid service of the home network 200 is in an international roaming state, the calling terminal 202 connected to the home network 200 is connected to the roaming network 250. In the case of requesting a call with the called terminal 252 connected to the call), a call processing procedure and a billing processing method for the provided service are explained accordingly.

In particular, FIG. 6 will be described with reference to a call processing flow for a voice call service and a video call service.

Referring to FIG. 6, when the switch / VLR 206 of the home network 200 receives a call setup request message from the calling terminal 202 (S602), the switch / VLR 206 may transmit a path information request message ( A MAP_SEND_ROUTING_INFORMAION message) is transmitted to the HLR 216 (S604). Here, the route information request message is used for the purpose of obtaining route information to the exchange that the destination terminal 252 last registered.

When the destination terminal is in the outbound roaming state, the HLR 216 sends a roaming number provision request message (MAP_PROVIDE_ROAMING_NUMBER message) to the destination terminal 252 through the gateway location register 264 to obtain a roaming number of the destination terminal. Transmit to switch / VLR 256 (S606 to S608).

The exchange / VLR 256 assigns a Mobile Subscriber Roaming Number (MSRN) corresponding to the called terminal 252 and then checks the roaming number providing response message (MAP_PROVIDE_ROAMING_NUMBER_ACK message) including the assigned MSRN. The data is transmitted to the HLR 216 of the home network 200 through the location register 264 (S610 to S612).

In general, the MSRN is a temporary number that is valid only for a single call. When the call is set up, information required to establish a routing path in a mobile network from a gateway mobile switching center to a target exchange is established. It consists of.

That is, the MSRN may include a roaming identifier, a roaming operator identifier, a roaming country prefix, a mobile network identifier and a provider code, and a subscriber identification number.

The HLR 216 transmits a path information response message including the received MSRN to the exchange / VLR 206 of the home network 200 (S614).

The exchange / VLR 206 is referred to as an ISUP Initial Address Message (IAM) for establishing a trunk of the roaming network 250 to the exchange / VLR 256 according to the received MSRN. ) And transmits the generated IAM to the exchange / VLR 256 of the roaming network 250 (S614). Here, the trunk means a predetermined communication line necessary for transmitting and receiving data and control messages between the originating exchange and the visited exchange.

That is, the exchange / VLR 206 may determine whether the terminating terminal 252 is roaming internationally through the MSRN, and when the terminating terminal 252 is roamed internationally, the exchange / VLR 206 is configured to roam the IAM. To the exchange / VLR 256 of 250.

When the exchange / VLR 256 of the roaming network 250 receives the IAM, the switch / VLR 256 for requesting prepaid service charging to the intelligent network service control device 212 of the home network 200 according to the VT-CSI stored at the time of location registration is requested. An initial detection point (IDP) message is transmitted (S618). Here, the IDP message is a control message defined in the CAP protocol specification.

When receiving the IDP message, the intelligent network service control apparatus 212 of the home network 200 checks whether the corresponding subscriber is a prepaid service subscriber and whether the prepaid balance remains.

If a predetermined prepaid balance for providing the requested call service remains, the intelligent network service control apparatus 212 may request a call information request message and a BCSM report request message. Model)), the charging processing request message (Apply Charging message) and the connection message (Connect message) is sequentially transmitted to the roaming network 250 switch / VLR (256) (S620 to S622).

Here, the call information request message is a message used for requesting the exchange / VLR 256 located in the roaming network 250 for call detail information about the called terminal 252.

The BSCM report request message is a visited exchange, where the visited exchange refers to the exchange / VLR 256 located in the roaming network 250-the call state for the called terminal, where the call state is Busy, the answer Including the basic call status such as Answer, No Answer, Disconnect, etc., to report to the intelligent network service control device 212 of the home network 200. Control message.

The charge processing request message informs the visited exchange 256 about the purpose of instructing the visited exchange 256 to start charging processing for the destination terminal 252 and the available time corresponding to the prepaid balance of the prepaid service subscriber. This message is used for the purpose of doing so.

Here, the available call time may be calculated according to the type of service requested by the calling terminal 202, including voice call, video call, packet data communication, and the like.

The connection message may be used for the purpose of transferring the called number or changing information required for call processing.

When the exchange / VLR 256 receives the connection message, the exchange / VLR 256 transmits an incoming call request message to the called terminal 252 according to the received call processing information (S624).

Here, the incoming call request message is used to deliver resource allocation information necessary for wireless communication to the destination terminal 252, and the destination terminal 252 may establish a wireless communication channel according to the received radio resource allocation information.

Although not shown in the figure, the exchange / VLR 256 transmits resource allocation information allocated to the terminating terminal 252 also to the radio access network to which the terminating terminal 252 is connected, and the radio access network receives the received resource allocation information. A channel required for wireless communication with the terminating terminal 252 can be set using.

After performing the response procedure with the destination terminal 252 (S626), the exchange / VLR 256 transmits a BCSM Event Report (ERB) message including time information (tAnswer) in which the response procedure is completed. The device 212 transmits to the device 212 (S628).

Here, when the exchange / VLR 256 receives an answer signal from the called terminal 252, it may determine that the response procedure is completed.

Subsequently, the exchange / VLR 256 transmits an ISUP Address Complete Message (ACM) and an ISUP Response Message (ANM) to the exchange / VLR 206 located in the home network 200 (S630). .

If the exchange / VLR 256 receives the call setup release request message from the called terminal 252, it performs a disconnect procedure for releasing the pre-allocated resources for the called terminal 252 (S632). ). That is, the exchange / VLR 256 may delete the call channel set in the called terminal 252 through a golden procedure.

Of course, it should be noted that the above procedure in step 632 may be performed according to the call establishment release request message received from the originating terminal 202.

The exchange / VLR 256 transmits a BSCM event report message including the time information tDisconnect for which the golden procedure is completed to the intelligent network service control device 212 (S634).

Thereafter, the exchange / VLR 256 transmits a call information report message (CIRP) including detailed call history information provided to the called terminal 252 to the intelligent network service control device 212 (S636).

In addition, the exchange / VLR 256 transmits an Charging Report (ACR) message to the intelligent network service control device 212 indicating that the charging processing for the destination terminal 252 is completed (S638).

The intelligent network service control apparatus 212 calculates a fee using the call history information received in step 636, and subtracts the calculated fee from the prepaid amount.

The intelligent network service control device 212 transmits a Furnish Charging Information (FCI) message including the remaining prepaid amount to the exchange / VLR 256 located in the roaming network 250 (S640).

Thereafter, the intelligent network service control device 212 transmits a progress message to the switch / VLR 256 to instruct the roaming network 250 to continue the desired procedure (S642).

The exchange / VLR 256 of the roaming network 250 transmits an end message to the intelligent network service control device 212 indicating that the golden procedure is terminated (S644), and then the call established for the calling terminal 202. A release message indicating release of the channel is transmitted to the exchange / VLR 206 of the home network 200 (S648).

When the exchange / VLR 206 of the home network 200 receives a release message from the exchange / VLR 256 of the roaming network 250, charging data records for the calling terminal 202 and the called terminal 252 ( After generating a Charging Data Record (CDR), a procedure for releasing channel resources set for the calling terminal 202 is performed (S648).

Preferred embodiments of the present invention described above are disclosed for purposes of illustration, and those skilled in the art will be able to make various modifications, changes, and additions within the spirit and scope of the present invention. Additions should be considered to be within the scope of the following claims.

1 is a system configuration diagram illustrating a location update procedure using a gateway location register according to an embodiment of the present invention.

2 is a network diagram illustrating a method for providing a prepaid service for an international roaming mobile terminal according to an embodiment of the present invention.

3 is a flowchart illustrating a First Location Update Procedure for an international roaming mobile terminal according to an embodiment of the present invention.

4 is a flow chart illustrating a second and further location update procedure for an international roaming mobile terminal in accordance with an embodiment of the present invention.

5 is a flowchart illustrating a procedure for deleting location information according to an embodiment of the present invention.

6 is a flowchart illustrating a call processing procedure for an international roaming mobile terminal according to an embodiment of the present invention.

* Key Drawing

200: Home Network

202: calling terminal

206: originating exchange

212: intelligent network service control device (SCP)

216: Home Location Register

220: international network

230: International Signaling Network

250: Out_Bound Roaming Network

252: called terminal

256: visit exchange

264: Gateway Location Register (GLR)

Claims (18)

In the incoming call charging method for the mobile terminal (Out_Bound Roaming) in the home network (Home Network), A subscriber information transmission step of extracting subscriber information corresponding to the mobile terminal and transmitting the extracted subscriber information to the roaming network when receiving a location update message of the mobile terminal from a roaming network; When receiving a call setup request message for receiving the mobile terminal from the calling terminal connected to the home network, the mobile terminal acquires route information to the visited exchange to which the mobile terminal is connected, and receives the incoming call according to the obtained route information. An incoming call setup step of setting up; When the mobile terminal is subscribed to a prepaid service, a prepaid information transmitting step of calculating a callable time corresponding to the prepaid amount and transmitting the same to the visited exchange; And At the end of the call, prepaid billing processing step of receiving the incoming call history information provided to the mobile terminal from the visited exchange to calculate the call charge, and subtract the calculated call charge from the prepaid amount. Incoming call charging method for an international roaming mobile terminal comprising a. The method of claim 1, The subscriber information transmission step Receiving a location update request message from the visited exchange; Transmitting a subscriber data insertion request message including the extracted subscriber information to the visited exchange; Receiving a subscriber data insertion response message from the visited exchange; And Sending a location update response message to the visited exchange. Incoming call charging method for an international roaming mobile terminal comprising a. The method of claim 1, The subscriber information includes CAMEL trigger information, and the visited exchange exchanges the BCSM event report message to report to the home network a BCSM event report message generated in response to the CAMEL trigger information. An incoming call charging method for an international roaming mobile terminal, characterized in that. The method of claim 3, wherein The CAMEL trigger information includes at least one of a call processing procedure for each service type, whether roaming is allowed, a basic call state model (BCSM) transition, a BCSM event, and a detection point (DP). An incoming call charging method for a roaming mobile terminal. The method of claim 4, wherein The call processing procedure for each service type is Real-time billing procedure for voice and video calling; Real-time billing procedures for voice and video incoming calls; Real time billing procedure for short messages; And Real-time billing process for packet data calls Incoming call charging method for an international roaming mobile terminal, characterized in that it comprises at least one of. The method of claim 3, wherein The BCSM event is Disconnect event (Disconnect Event) means that the call channel set in the calling or destination terminal is disconnected; Busy Event means that the called terminal is busy; No answer event (No Answer Event) indicating that there is no response from the called terminal; A route select failure event, meaning that the called terminal is located in an unreceivable area; And Answer Event, which means that incoming call setup is complete Incoming call charging method for an international roaming mobile terminal comprising a. The method of claim 6, The BCSM event further includes a balance shortage event indicating that a callable time corresponding to a prepaid amount has elapsed, wherein the visited exchange exchanges the callback time before the call time provided for the incoming call exceeds or exceeds the callable time. And the BSCM event report message including a balance shortage event is transmitted to the home network. The method of claim 1, When the visited exchange receives a roaming number provision request message from the home network, the visited exchange allocates a Mobile Subscriber Roaming Number (MSRN) to the home network and transmits it to the home network. . The method of claim 8, The home network acquires a route to the visited exchange using the received MSRN, and transmits an ISUP initial address message for establishing an incoming call to the visited exchange through the obtained route. Incoming call charging method for an international roaming mobile terminal. The method of claim 1, The prepaid information transmission step Receiving an Initial Detection Point message from the visited exchange; Determining whether the mobile terminal subscribes to a prepaid service and whether a prepaid balance remains; And If the mobile terminal is subscribed to a prepaid service and the prepaid balance remains, transmitting a billing request message including a talkable time corresponding to the prepaid balance to the visited exchange. Incoming call charging method for an international roaming mobile terminal comprising a. The method of claim 1, And a prepaid amount updating step of transmitting the deducted prepaid amount to the visited exchange. A method of providing a prepaid service for an international roaming mobile terminal in an intelligent network service control device connected to a home network, Receiving an Initial Detection Point message requesting the start of prepaid service charging for the mobile terminal from a visited exchange; When the mobile terminal is subscribed to a prepaid service, checking whether there is a sufficient prepaid amount corresponding to a service to be provided to the mobile terminal; As a result of the checking, if there is a sufficient prepaid amount, calculating a callable time for each service type corresponding to the prepaid amount and providing the callable time to the visited exchange; And When receiving the call history information on the mobile terminal from the visited exchange, calculating a call charge corresponding to the call history information, and subtracting the calculated call charge from the prepaid amount. The prepaid service providing method for an international roaming mobile terminal in an intelligent network service control device comprising a. The method of claim 12, And transmitting the deducted prepaid amount to the visited exchange using a Charging Charging Information message. . A computer-readable recording medium having recorded thereon a program for executing the method of any one of claims 1 to 13 on a computer. A system for providing an incoming call prepaid service for an international roaming mobile terminal, When receiving the initial location update message of the mobile terminal from the gateway location register, the location information included in the initial location update message is stored, and subscriber information corresponding to the mobile terminal according to whether to subscribe to the prepaid service and the international roaming service. A home location register for extracting and providing the gateway location register; Upon receipt of an outgoing call request, a mobile subscriber roaming number (MSRN) for the mobile terminal is obtained from the home location register, and a routing path to the visited exchange is established using the obtained mobile subscriber roaming number. Outgoing exchange; And Intelligent network service control device that provides a pre-paid charging service for the incoming call when receiving an initial detection point message from the visited exchange through the established routing path Incoming call prepaid service providing system for an international roaming mobile terminal comprising a. The method of claim 15, The mobile subscriber roaming number is assigned by the visited exchange and is transmitted to the home location register through the gateway location register. The method of claim 15, The mobile subscriber roaming number includes an at least one of a roaming identifier, a roaming operator identifier, a roaming country prefix, a mobile network identifier and an operator code, and a subscriber identification number. Service delivery system. The method of claim 15, The intelligent network service control device Means for providing the visited exchange with a talkable time corresponding to a prepaid amount when the mobile terminal is subscribed to a prepaid service; Means for receiving an incoming call call history information provided to the mobile terminal from the visited exchange; And Means for subtracting a call charge corresponding to the call detail information from the prepaid amount; Incoming call prepaid service providing system for an international roaming mobile terminal, characterized in that for providing the prepaid billing service through.

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