KR101058645B1 - Method and system to subtract short message service cost in real time regardless of intelligent network support level - Google Patents

Abstract

A method and system are provided for subtracting the cost of short message service in real time regardless of the level of support for the intelligent network.

According to an embodiment of the present invention, a method of real-time deducting a short message service cost irrespective of an intelligent network support level, in a method of managing a short message service cost of an intelligent network subscriber when roaming from a home network to a visited network, Extracting the intelligent network subscriber information from the first message including the intelligent network subscriber information and storing the information in the intelligent network subscriber profile database; In accordance with whether the intelligent network subscriber information is stored, including the intelligent network-related service key value information in a second message requesting to transmit the short message sent by the mobile terminal of the visited network, and transmitting the information to the short message service center; ; And requesting, by the short message service center for receiving the second message including the intelligent network related service key value information, a real time subtraction of the short message service cost.

GLR, SMSC, MSC

Description

Method and system for balancing the charge of Short Message Service at real time irrelevant to phase of intelligent network}

The present invention relates to a technology for managing a short message service cost when roaming a mobile terminal, and more particularly, a short message service cost regardless of an intelligent network support level when an intelligent network prepaid subscriber roams from a home network to a visited network. It relates to a method and system for subtracting in real time.

The mobile communication system has been developed through the first generation analog Advanced Mobile Phone Systems (AMPS) method, the second generation cellular and personal communication service (PCS) method, and recently the third generation mobile communication system. IMT-2000 (International Mobile Telecommunication-2000) system is popular. IMT-2000 was developed for high speed data transmission and personal mobility guarantee to ensure mobility between countries by integrating systems of countries using different radio access standards. The IMT-2000 has been developed separately from a synchronous CDMA (Code Division Multiple Access) 2000 system centered on Korea and the United States, and a Universal Mobile Telecommunication Services (UMTS) or WCDMA system centered on Europe.

WCDMA system is leading the standardization in 3GPP (3 Generation Partnership Project). It is an asynchronous communication system developed by combining CDMA technology with European GSM method. It integrates various systems such as cellular, wireless telephone, wireless LAN and satellite communication. And provides international roaming to make calls anywhere in the world. Such international roaming is a service area of a home network (area currently serviced by an operator contracted by the owner of a terminal) in a plurality of networks operated by different operators. Network, the visited network acquires the location information of the terminal moved from the home network and, based on the acquired information, a call service and a short message service for the terminal. , An SMS), a multimedia message service (hereinafter, referred to as an MMS), and the like.

By the way, when an intelligent network prepaid subscriber for SMS moves to a visited network at the time of international roaming and transmits a short message to another mobile terminal existing in the home network, the visited network conventionally uses an intelligent network of a specific standard defined in 3GPP ( In particular, only when CAMEL Phase 3) is supported, real-time billing was possible for intelligent network prepaid subscribers using short message service. In other words, if the visited network does not support an intelligent network of a specific standard specified in 3GPP, there is a problem that real-time charging for SMS is impossible.

The technical problem to be achieved by the present invention is to extract and store the intelligent network subscriber information from the first message (ISD) containing the intelligent network subscriber information, the intelligent network related service key in the short message transmission request message according to whether the intelligent network subscriber information is stored It is to provide a method and system for real-time deducting the short message service cost regardless of the level of support for the intelligent network, which can perform real time deduction of the short message service cost by transmitting the value information.

The object of the present invention is not limited to the above-mentioned object, and other objects that are not mentioned will be clearly understood by those skilled in the art from the following description.

According to an embodiment of the present invention for achieving the above object, a method for real-time deducting a short message service cost irrespective of an intelligent network support level may include: CLAIMS 1. A method for managing a network, the method comprising: extracting the intelligent network subscriber information from a first message including the intelligent network subscriber information and storing the intelligent network subscriber information in an intelligent network subscriber profile database; In accordance with whether the intelligent network subscriber information is stored, including the intelligent network-related service key value information in a second message requesting to transmit the short message sent by the mobile terminal of the visited network, and transmitting the information to the short message service center; ; And requesting, by the short message service center for receiving the second message including the intelligent network related service key value information, a real time subtraction of the short message service cost.

In addition, according to an embodiment of the present invention for achieving the above object, the system for subtracting the short message service cost in real time regardless of the intelligent network support level, the short message of the intelligent network subscriber when roaming from the home network to the visited network A system for managing service costs, the system comprising: a home location register in a home network that performs location registration for a mobile terminal of the visited network and transmits a first message including intelligent network subscriber information; A relay location register in the home network that receives the first message including the intelligent network subscriber information from the home location register, extracts the intelligent network subscriber information from the received first message, and stores the intelligent network subscriber information in an intelligent network subscriber profile database; (GLR), wherein the relay location register receives a second message requesting to transmit a short message sent by a mobile terminal of the visited network, and wherein the relay location register receives the second message according to whether the intelligent network subscriber information is stored. 2 The message includes information on the intelligent network-related service key value and transmitted.

Specific details of other embodiments are included in the detailed description and the drawings.

According to the embodiment of the present invention as described above, even if the visited network supports the intelligent network of any standard defined in the 3GPP, the real-time deduction can be made to the intelligent network prepaid subscriber using the short message service regardless of the nature of the intelligent network of the visited network. There is an advantage.

The effects of the present invention are not limited to the above-mentioned effects, and other effects not mentioned will be clearly understood by those skilled in the art from the description of the claims.

Advantages and features of the present invention and methods for achieving them will be apparent with reference to the embodiments described below in detail with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be embodied in various different forms, and the present embodiments merely make the disclosure of the present invention complete, and are common in the art to which the present invention pertains. It is provided to fully inform those skilled in the art of the scope of the invention, which is to be defined only by the scope of the claims. Like reference numerals refer to like elements throughout.

1 is a block diagram of a system for deducting a short message service cost in real time regardless of an intelligent network support level according to an embodiment of the present invention.

Referring to the system shown in FIG. 1, the home network includes a mobile terminal 100, a radio transceiver subsystem / radio network controller (RTS / RNC) 110, which is wirelessly connected to the mobile terminal 100, and a switch. (MSC) 120, Gateway Location Register (GLR) (130), Home Location Register (HLR) (140), Short Message Service Center (SMSC) (150) It may be configured to include a real-time subtraction unit 160. The visited network may include a mobile terminal 200, an overseas exchange 210, and an overseas roaming network 220.

First, the mobile terminal 100 of the home network and the mobile terminal 200 of the visited network are terminals using a short message service (SMS) through a circuit switched network (CSN) and a packet switched network (PSN). Software supporting short message service should be installed to enable incoming and outgoing short messages. Herein, the mobile terminals 100 and 200 have SMS functions regardless of the names of the mobile terminals such as cellular phones, personal communication service (PCS) phones, PDA phones, GSM phones, CDMA-2000 phones, WCDMA phones, and DMB phones. If the terminal is an embodiment of the present invention may be applied.

The base station / base station controller (RTS / RNC) 110 ensures mobility of the mobile terminals 100 and 200 and performs handoff and radio resource management functions. The base station / base station controller (RTS / RNC) 110 configures an access network for circuit connection or packet connection of the mobile terminal 100 to the core network. Specifically, the base station (RTS) performs a radio access termination function with a subscriber station conforming to the 3rd Generation Partnership Project (3GPP) radio access standard. In particular, the base station (RTS) transmits and receives voice, video, and data traffic in a WCDMA manner. The base station controller (RNC) performs functions such as wired and wireless channel management, protocol matching with subscriber stations, protocol matching between base stations, soft handoff processing, core network protocol processing, general packet radio service (GPRS) access, fault management, and system loading. In charge.

The exchanger (MSC) 120 has a soft switching structure to speed up call processing in addition to the basic functions for voice communication in the existing IS-95B network. Here, soft switching is a technology capable of processing voice, data, and video signals with a high speed packet switch by upgrading a circuit switch of a conventional exchange to a software switch.

The overseas MSC 210 is a node interworking with the GLR 130 of the home network through the overseas roaming network 220 in the visited network. In addition, the overseas MSC 210 requests the GLR 130 to register the location of the mobile terminal 200 of the visited network, and the GLR 130 transmits it to the HLR 140 to thereby locate the mobile terminal 200. Information may be registered in the HLR 140 of the home network.

The home location register (HLR) 140 stores and manages subscriber information, additional service information for each subscriber, and location information of a mobile communication terminal. In particular, the home location register 140 stores profile information of the sending and receiving terminals. This profile information includes the mobile identification number (MIN) (subscriber telephone number), the ESN (electric serial number) of the subscribing terminal, the subscribed additional service information, and the like. The home location register 140 according to an embodiment of the present invention may perform location registration for the mobile terminal 200 according to a location registration request of the overseas MSC 210. In addition, the first message including the intelligent network subscriber information for the short message service may be transmitted to the GLR 130. Here, the first message may be Insert Subscriber Data (ISD) defined in the 3GPP standard, and the intelligent network subscriber information may be SMS-CSI (CAMEL Subscription Information) defined in the 3GPP standard.

The relay location register (GLR) 130 performs a function of a virtual home location register for the mobile terminal 200 roaming to the visited network, and may be established in the home network while the mobile terminal 200 roams. have. That is, when the mobile terminal 200 uses a roaming service, the GLR 130 registers location information and subscribed additional service information stored in the original home location register of the mobile terminal 200. In addition, the GLR 130 is a protocol of each communication network for roaming services between foreign and domestic networks using different Mobile Application Protocol (MAP) protocols (ANSI-41, GSM (Europe), PDC (Japan), UMTS, etc.). You can convert it to match your needs. In addition, the GLR 130 may perform a function of converting the telephone number of the mobile communication terminal to match the protocol of each communication network.

The relay location register 130 according to an embodiment of the present invention receives the first message including the intelligent network subscriber information from the home location register 140 described above, and extracts the intelligent network subscriber information from the received first message. Can be stored in the intelligent subscriber profile database. After storing the intelligent network subscriber information, the first message from which the intelligent network subscriber information is removed may be transmitted to the overseas MSC 210. Because, in the related art, the SMS-CSI (CAMEL Subscription Information) defined in the 3GPP standard could only be transmitted to an exchange supporting CAMEL Phase 3, so when roaming to a network supporting CAMEL (Customized Applications for Mobile network Enhanced Logic) Phase 3 Only SMS real-time deduction was possible. However, in one embodiment of the present invention, since the first message without the SMS-CSI (CAMEL Subscription Information) can be transmitted to the overseas MSC 210, the SMS prepaid subscriber's real-time regardless of the level or attribute of the intelligent network support in the visited network can be transmitted. Deduction can be performed.

Meanwhile, a process of storing the intelligent network subscriber information will be described later with reference to FIG. 3.

In addition, the relay location register 130 according to an embodiment of the present invention may receive a second message from the overseas MSC 210 requesting the transmission of the short message sent by the mobile terminal 200 of the visited network. In addition, it is determined whether the intelligent network subscriber information for the user of the mobile terminal 200 is stored, and if it is determined that the intelligent network subscriber information is stored, the intelligent message related service key value information is included in the second message to be described later. The short message service center (SMSC) 150 may be transmitted. The process of including the service key value information in the second message will be described later with reference to FIG. 4.

The short message service center (SMSC) 150 processes a basic service for SMS and performs a function of temporarily storing or delivering data for processing a short message. In addition, it performs a gate function for a short service, performs a terminal service MAP (Mobile Application Part) processing function for interworking with the exchange 120 and the home location register 140, and a protocol for interworking with an external service provider. It also performs a matching function.

As described above, the short message service center (SMSC) 150 according to an embodiment of the present invention receives the second message of the intelligent network prepaid subscriber by receiving the second message including the intelligent network related service key value information from the GLR 130. Real-time deductions can be made on costs. The real-time subtraction process of the SMS prepaid subscriber will be described later with reference to FIG. 5.

Meanwhile, the intelligent network related service key value information may be information obtained by recording a predefined value between the GLR 130 and the SMSC 150 in a table form.

A multimedia message service center (MMSC) (not shown) is a server that provides a multimedia message service, and serves to provide a user with services related to all types of media such as text, music, graphics, and video. Unlike SMS, which transmits simple text messages, multimedia message service (MMS) is a message service that enables the transmission and reception of multimedia information by processing, converting and selecting data in various formats to suit various multimedia service environments. . The real-time subtraction unit 160 determines whether the intelligent network related service key value information is included in the second message received by the SMSC 150, and if it is determined that the intelligent network related service key value information is included, A real-time deduction request message including service key value information and originating operator information is received from the SMSC 150. Then, real-time subtraction is performed using the intelligent network related service key value information and the calling operator information.

Meanwhile, the real time subtraction unit 160 may notify the SMSC 150 of the result of performing the real time subtraction. In addition, if it is determined that the balance is exhausted after the real-time deduction unit 160 performs a real-time deduction, the balance depletion notification message may be transmitted to the HLR 140. The received HLR 140 may transmit a short message transmission prohibition request message to the overseas MSC (210).

In an embodiment of the present invention, the real-time subtraction unit 160 may be implemented by a GSM service control function (gsmSCF) on the 3GPP standard.

Hereinafter, a method of deducting a short message service cost in real time regardless of the intelligent network support level based on the above-described system will be described with reference to FIGS. 2 to 5.

2 is a flowchart illustrating a method of subtracting a short message service cost in real time regardless of an intelligent network support level according to an embodiment of the present invention.

Referring to FIG. 2, the GLR 130 extracts the intelligent network subscriber information from the first message ISD including the intelligent network subscriber information (SMS-CSI) and stores it in the intelligent network subscriber profile database (S100). This process will be permanently described with reference to FIG. 3. 3 is a diagram illustrating a process of storing intelligent network subscriber information in a GLR when registering a location of a mobile terminal.

Referring to FIG. 3, when the mobile terminal 200 of the visited network requests registration of the location to the GLR 130 through the overseas MSC 210 of the visited network (S102), the GLR 130 transmits to the HLR 140. By requesting location registration, location information of the mobile terminal 200 of the visited network is registered in the HLR 140 of the home network (S104).

When the HLR 140 transmits the first message (ISD) including the above-described intelligent network subscriber information to the GLR 130 (S106), the GLR 130 extracts the intelligent network subscriber information from the first message (ISD). And store in the intelligent network subscriber profile database (S108).

The GLR 130 removes the intelligent network subscriber information from the first message and transmits the first message to the overseas MSC 210 (S110).

Referring to FIG. 2 again, the GLR 130 according to whether the intelligent network subscriber information is stored, the intelligent network to the second message requesting to transmit a short message sent by the mobile terminal 200 of the visited network. The relevant service key value information is included and transmitted to the SMSC 150 (S200). This process will be permanently described with reference to FIG. 4. 4 is a diagram illustrating a process of adding service key value information to a short message transmission request message.

Referring to FIG. 4, when the foreign MSC 210 transmits the second message to the relay location register (GLR) 130 of the home network (S202), the GLR 130 transmits to the user of the mobile terminal 200. It is determined whether the intelligent network subscriber information is stored in the user (S204).

If it is determined that the intelligent network subscriber information is stored, the intelligent network related service key value information is included in the second message and transmitted to the SMSC 150 (S206), and it is determined that the intelligent network subscriber information is not stored. In the case where the second message does not include the intelligent network related service key value information, it transmits to the SMSC 150 (S208). Here, the intelligent network related service key value information may be information recorded in a table form of a predefined value between the GLR 130 and the SMSC 150 as described above in the description of FIG. 1.

Finally, referring back to FIG. 2, the SMSC 150 receives the second message including the intelligent network related service key value information, and causes the real-time subtraction unit 160 to perform a real-time subtraction of the short message service cost. To (S300). This process will be permanently described with reference to FIG. 5. 5 is a diagram illustrating a process of performing a real-time subtraction of a short message service cost.

Referring to FIG. 5, after the SMSC 150 performs the incoming process of the second message (S302), the SMSC 150 determines whether the received second message includes service key value information related to the intelligent network (S302). S304).

When it is determined that the intelligent network related service key value information is included, the SMSC 150 transmits a real time subtraction request message including the intelligent network related service key value information and the originating operator information to the real time subtraction unit 160 (S306). ).

The real-time subtraction unit 160 may perform real-time subtraction of the intelligent network prepaid subscriber using the intelligent network-related service key value information and the calling operator information (S308), and may notify the SMSC 150 of the result of performing the real-time subtraction again. There is (S310).

In addition, the real-time deduction unit 160 checks whether the balance is exhausted after performing the real-time deduction (S312), and if it is determined that the balance is exhausted, transmits the balance exhaustion notification message to the HLR 140 of the home network. (S314).

The HLR 140 receiving the balance exhaustion notification message may transmit a short message transmission prohibition request message to the overseas MSC 210 of the visited network (S316).

Meanwhile, the embodiment of the present invention may be applied not only to a circuit switched network (CSN) but also interworked with a packet switched network (PSN), which will be described with reference to FIG. 6.

6 is a block diagram of a system for deducting a short message service cost in real time by interworking with a packet data network according to another embodiment of the present invention. Referring to the system illustrated in FIG. 6, the home network includes a mobile terminal 100, a base station / base station controller (RTS / RNC) 110 wirelessly connected to the mobile terminal 100, and an SGSN. Serving GPRS Support Node / Gateway GPRS Support Node (GGSN) 170, Packet Data Network 180 interworking with SGSN / GGSN 170, Relay Location Register (GLR) 130, Home Location Register It may include a Home Location Register (HLR) 140, a Short Message Service Center (SMSC) 150, and a real time subtraction unit 160. The visited network may include a mobile terminal 200, an overseas exchange 210, and an overseas roaming network 220.

However, in the configuration of FIG. 6, the SGSN / GGSN 170 may be connected instead of the MSC 120 in the configuration of FIG. 1, and the packet data network 180 is linked to the SGSN / GGSN 170. Except for the point, it can be seen that it is the same as the configuration of FIG. Accordingly, the SGSN / GGSN 170 may perform all of the functions of the MSC 120 in FIG. 1. In addition, the Serving GPRS Support Node (SGSN) has a hardware architecture that provides Asynchronous Transfer Mode (ATM) -based switch and routing connections for GPRS services, and includes packets with the mobile terminal 100 in the service area. Node that delivers data. In addition, the Gateway GPRS Support Node (GGSN) is a node that is in charge of the connection function between the GPRS backbone network and the external packet data network 180, manages sessions for packet data services, and performs routing processing of packet data. An interface for connecting the packet data network 180 is provided.

Although the embodiments of the present invention have been described above with reference to the accompanying drawings, those skilled in the art to which the present invention pertains may implement the present invention in other specific forms without changing the technical spirit or essential features thereof. I can understand that. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive.

1 is a block diagram of a system for deducting a short message service cost in real time regardless of an intelligent network support level according to an embodiment of the present invention.

2 is a flowchart illustrating a method of subtracting a short message service cost in real time regardless of an intelligent network support level according to an embodiment of the present invention.

3 is a diagram illustrating a process of storing intelligent network subscriber information in a GLR when registering a location of a mobile terminal.

4 is a diagram illustrating a process of adding service key value information to a short message transmission request message.

5 is a diagram illustrating a process of performing a real-time subtraction of a short message service cost.

6 is a block diagram of a system for deducting a short message service cost in real time by interworking with a packet data network according to another embodiment of the present invention.

Claims (19)

A method for managing a short message service cost of an intelligent network subscriber when roaming from a home network to a visited network, Extracting, by the relay location register of a home network, the intelligent network subscriber information from the first message including the intelligent network subscriber information and storing the information in the intelligent network subscriber profile database; Short message service by including intelligent network related service key value information in a second message requesting the relay location register to transmit a short message sent by a mobile terminal of the visited network according to whether the intelligent network subscriber information is stored. Transmitting to a center; Requesting the short message service center to receive the second message including the intelligent network related service key value information to perform a real-time subtraction of the short message service cost, regardless of the intelligent network support level. How to subtract the cost of a message service in real time. The method of claim 1, Prior to the storing step, Performing location registration by a mobile terminal of the visited network to a home location register of the home network through an exchange of the visited network; And receiving, by the relay location register of the home network, the first message including the intelligent network subscriber information from the home location register in real time, regardless of the intelligent network support level. . The method of claim 2, After the storing step, And transmitting, by the relay location register, the first message from which the intelligent network subscriber information has been removed to the exchange, in real time, the short message service cost regardless of the intelligent network support level. The method of claim 1, The transmitting step, Receiving, by the relay location register of the home network, the second message from the exchange of the visited network; Determining, by the relay location register, whether intelligent network subscriber information for a user of the mobile terminal is stored; If it is determined that the intelligent network subscriber information is stored, including the intelligent network related service key value information in the second message and transmitting the information to the short message service center, the short message service irrespective of the intelligent network support level. How to subtract your costs in real time. The method according to claim 1 or 4, The intelligent network-related service key value information is information in which a predefined value is recorded in a table form between the relay location register and the short message service center. The method of claim 1, Requesting to perform the real-time subtraction, Determining, by the short message service center, whether the received second message includes service key value information related to the intelligent network; If it is determined that the intelligent network related service key value information is included, transmitting a real time subtraction request message including the intelligent network related service key value information and the originating operator information to the real time subtraction unit; The real-time subtraction unit performs a real-time subtraction using the intelligent network-related service key value information and the originating operator information, the real-time subtraction of the short message service costs irrespective of the intelligent network support level. The method of claim 6, Requesting to perform the real-time subtraction, The real-time subtraction unit further comprises the step of notifying the short message service center of the result of performing the real-time subtraction, the real-time deduction of the short message service costs irrespective of the intelligent network support level. The method of claim 6, Requesting to perform the real-time subtraction, Checking whether the real time deduction unit has exhausted the balance after performing the real time deduction, and if the balance is depleted, transmitting a balance depletion notification message to a home location register of the home network; And receiving the balance exhaustion notification message, sending a short message prohibition request message to an exchange of the visited network, in real time, deducting a short message service cost irrespective of an intelligent network support level. The method according to any one of claims 1 to 4 and 6 to 8, The intelligent network includes an intelligent network defined in 3GPP's CAMEL (Customized Applications for Mobile Network Enhanced Logic) specification, and a method of deducting a short message service cost in real time regardless of the intelligent network support level, irrespective of the attribute of the intelligent network. . A system for managing a short message service cost of an intelligent network subscriber when roaming from a home network to a visited network, A home location register in the home network that performs location registration for a mobile terminal of the visited network and transmits a first message including intelligent network subscriber information; A relay location register in the home network that receives the first message including the intelligent network subscriber information from the home location register, extracts the intelligent network subscriber information from the received first message, and stores the intelligent network subscriber information in an intelligent network subscriber profile database; (GLR), The relay position register, Receives a second message requesting to transmit a short message sent by the mobile terminal of the visited network, and transmits the intelligent network related service key value information in the second message according to whether the intelligent network subscriber information is stored. A system that deducts the cost of a short message service in real time regardless of the support level of an intelligent network. 11. The method of claim 10, Further comprising a switch in the visited network for requesting a location registration for a mobile terminal of the visited network to the home location register via the relay location register, and sending the second message to the relay location register, The home location register, in real time, deducts a short message service cost regardless of an intelligent network support level, performing location registration for the mobile terminal according to a location registration request of the exchange. The method according to claim 10 or 11, wherein And a short message service center in the home network for receiving the second message including the intelligent network related service key value information from the relay location register and performing a real time subtraction of the short message service cost. A system that deducts the cost of a short message service in real time regardless of the support level of an intelligent network. The method of claim 11, The relay location register (GLR) transmits a first message from which the intelligent network subscriber information has been removed to the exchange, thereby deducting a short message service cost in real time regardless of the intelligent network support level. 13. The method of claim 12, The relay position register (GLR), It is determined whether the intelligent network subscriber information for the user of the mobile terminal is stored, and when it is determined that the intelligent network subscriber information is stored, the short message includes the intelligent network related service key value information in the second message. A system that deducts the cost of a short message service in real time, regardless of the level of support for the intelligent network, sent to the service center. The method of claim 14, The intelligent network-related service key value information is information that records a predefined value between the relay location register and the short message service center in a table form. 13. The method of claim 12, The short message service center, And determining whether the received second message includes the intelligent network related service key value information in real time, regardless of the intelligent network support level. The method of claim 16, If it is determined that the intelligent network related service key value information is included, the real-time deduction request message including the intelligent network related service key value information and the originating operator information is received from the short message service center, and the intelligent network related information is received. And a real-time subtraction unit for performing real-time subtraction using service key value information and the calling operator information, wherein the short message service cost is subtracted in real time regardless of the intelligent network support level. The method of claim 17, The real time subtraction unit, And a system for deducting a short message service cost in real time regardless of an intelligent network support level, which notifies the short message service center of the result of performing the real time deduction. The method of claim 17, After the real-time subtraction unit performs the real-time deduction to check whether the balance is exhausted, if it is determined that the balance is exhausted, and sends a balance exhaustion notification message to the home location register, And the home location register transmits a short message service cost in real time regardless of an intelligent network support level to transmit a short message prohibition request message to an exchange of the visited network.

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