KR20070069647A - Inter-working mobile communication system and mobile communication terminal capable of service information notifying and service information notifying method - Google Patents

Abstract

A network interworking mobile communication system capable of supplying service information, a mobile communication terminal, and a service information supply method are provided to guide information on services available in a network where the terminal is currently registered, to a terminal user when the terminal moves between different networks, thus the user can easily check the available services. MSCs(Mobile Switching Centers)(24,34) store supportable service lists in network service tables to manage the stored lists, and search the tables according to a supportable service type confirmation request to notify of service information supportable in the current networks(20,30). A mobile communication terminal(50) demands supportable service type confirmation by using a predetermined message in case of initial location registration or after completing roaming between the networks(20,30), stores/manages service information supportable in the currently located network by updating service lists of a user service table, and checks the service lists to display the currently supported service information on a terminal screen.

Description

Inter-Working Mobile Communication System And Mobile Communication Terminal Capable Of Service Information Notifying And Service Information Notifying Method}

1 is a diagram illustrating a network-linked mobile communication system capable of providing service information according to the present invention.

2 is a signal flow diagram illustrating a service information providing procedure when initial location registration of a terminal in a network-linked mobile communication system according to the present invention;

3 is a flowchart illustrating a service information providing procedure when roaming (or handing off) a terminal in a network-linked mobile communication system according to the present invention;

*** Explanation of symbols for the main parts of the drawing ***

 1: PSTN 3: IP network

 5: SS7 network 7: HLR

20: 2G network 22: 2G CGS

24: 2G MSC 26: BSC

27: BTS 28: PDSN

30: 3G network 32: GMSC

34: 3G MSC 36: RNC

37: Node B 38: GGSN

40: SGSN 50: mobile communication terminal

The present invention relates to the provision of service information in a network-linked mobile communication system, and in particular, a second generation (hereinafter referred to as "2G") communication system and a third generation communication system (hereinafter referred to as "3G"). .) Regarding the interworking mobile communication system and the mobile communication terminal and service information providing method that can provide service information to guide the user's mobile terminal information on the services available in the communication system when moving between. will be.

The 3G communication system provides a consistent service that enables users of mobile communication terminals to transmit packet-based text, digitized voice or video and multimedia data at high speeds of 2Mbps or more, anywhere in the world. These 3G communication systems are divided into Wideband Code Division Multiple Access (WCDMA), which is adopted as the European standard, and CDMA2000, which is adopted as the American standard. WCDMA is an asynchronous mobile communication system based on Global System for Mobile communication (GSM) and General Packet Radio Services (GPRS) widely used in Europe and elsewhere. CDMA2000 is an IS-95 used in Korea, the United States, and Japan. It is a synchronous mobile communication system based on 2G CDMA system such as J-STD008. Currently, the 2G communication system and the 3G communication system are mixed, and thus, the mobile communication terminal also supports both 2G / 3G communication systems.

However, since the 2G communication system does not support high speed data communication, the service available in the 3G communication system may be restricted in the 2G communication system. Therefore, in the related art, a user must check one by one by using a menu for inquiring additional services in the idle state of the mobile communication terminal or by directly inputting a key. I had to. For example, to check whether the current service network provides a CFU (Call Forwarding Unconditional) function, there is a method of viewing a result by pressing * # 21 * Dial Number #.

However, such a conventional service inquiry method can be used only to confirm whether the supplementary services (CFU, CFB, CFNRy, CFNRc, CW, etc.) are supported, and if not, the specification of the network operator should be checked. There is a problem that it is not easy, and when moving to a 2G network, there is a problem that it is virtually impossible for a user to directly check the characteristics of the network.

The present invention has been made to solve the above-described problem, and in particular, information about services available in a network in which a mobile communication terminal is currently registered when moving between different generation networks (for example, a second generation network and a third generation network). An object of the present invention is to provide a network-linked mobile communication system capable of providing service information for guiding a terminal user, and a mobile communication terminal and a service information providing method.

Network interworking mobile communication system capable of providing service information according to the present invention for achieving the above object, in the mobile communication system that different generations of the network interworking, the list of services that can be supported in the network belonging to the network service table An exchanger of each network that stores and manages the service information and searches for the network service table in response to a request for checking a supportable service type and notifies service information supported by the current network; Stores and manages information on whether the service is provided in the currently located network for the service list provided by each network in the user service table of the internal memory unit, and transmits the predetermined message to the network at the time of initial location registration or completion of roaming between networks. Request the service type to check the supported service type, update the service list of the user service table according to the flag added to the message transmitted as the response or the processing result, and store and manage the service information supported by the current network. And a mobile communication terminal that checks a list of services stored in a user service table and displays currently supported service information on a terminal screen.

Here, the switch of each network, if the service information request flag is added to the message received from the mobile communication terminal at the time of initial registration of the mobile communication terminal or after completion of roaming between the networks, search the network service table to the service information request flag. After setting whether to support the service in the current network to each included service support confirmation bit, the response to the message received from the mobile communication terminal or the service information response to set the value of each service support confirmation bit when transmitting the processing result message By adding and transmitting a flag, the mobile communication terminal is informed of service information supported by the current network.

According to another aspect of the present invention, in a mobile communication terminal provided with a series of services by communicating with an exchange of each network while moving between different generation networks, information on whether the service is supported in the currently located network is stored. A user service table of the managed internal memory unit; A screen display unit for displaying the service information supported by the current network in the form of a list, a table, or an icon so as to identify a service available to a terminal user on a terminal screen; In order to confirm the type of service supported by the network in which the user is currently located when initial position registration or network roaming is completed, the service information request flag is added to a predetermined message and transmitted to the exchange side of the network, and the response or processing result The service list of the user service table is updated according to each service support confirmation bit value of the service information response flag added to the message transmitted to the message, and the service information stored in the user service table is checked to display the currently supported service information on the screen. The present invention provides a mobile communication terminal capable of providing service information including a terminal controller for controlling a display unit to display a terminal screen.

According to still another aspect of the present invention, there is provided a method of providing service information in a mobile communication system in which different generations of networks interwork with each other, by adding a flag to a predetermined message at the initial location registration or after completion of roaming between networks. Requesting confirmation of a service type that can be supported by the client; The exchange side of the network searches the network service table according to the request of the mobile communication terminal, sets the service information supported by the current network to the response flag, and adds it to the message transmitted as a response or processing result to the mobile communication terminal. Transmitting; And updating the user service table according to the response flag added to the message transmitted from the exchange at the network side, and displaying the service information supported by the current network on the terminal screen in the mobile communication terminal. To implement the service information provision method in.

The request for checking the type of service that can be supported by the network may include: performing a network search for receiving a signal of a base station or a node B of the network when power is applied to a mobile communication terminal; Type of service that can be supported by the exchange on the network side by adding a service information request flag to confirm the type of service supported by the network in which the network is currently located in the registration request message transmitted when the initial position registration is requested to the retrieved network side. And requesting confirmation, and if the mobile communication terminal moves to a service area of another network, requesting registration to a roaming network to which the mobile communication terminal has moved according to a manganese roaming procedure; After a series of registrations are completed in the roaming network, the mobile communication terminal adds and transmits a service information request flag to an information transmission / reception message to confirm the type of service supported by the roaming network. And requesting confirmation of the type.

In addition, the process of adding a response flag set with service information supported by the current network to the message and transmitting the message to the mobile communication terminal may include checking a service type supported by the current network in a message transmitted from the mobile communication terminal at the exchange side of the network. Checking whether a service information request flag for requesting an ID is added; If the service information request flag is added, the service information response flag is set by searching the network service table managed by the service information and setting the service support availability in the current network to each service support confirmation bit included in the service information request flag. Generating; And informing the mobile communication terminal of the service information supported by the current network by adding the generated service information response flag to the message transmitted as a response or processing result.

In addition, the process of displaying the service information currently supported in the mobile terminal on the terminal screen in the mobile communication terminal, the service information confirmation bit value of the service information response flag included in the message transmitted from the exchange of the network side in the mobile communication terminal Updating the service list of the user service table to store and manage service information that can be supported in the currently located network; And checking the service list stored in the user service table and displaying service information supported by the current network on a terminal screen in a list, table, or icon format.

Hereinafter, a network-linked mobile communication system capable of providing service information and a mobile communication terminal and a service information providing method according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating a mobile communication system in which a second generation network and a third generation network capable of providing service information according to the present invention interwork with each other, including a 2G network 20, a 3G network 30, an SS7 network 5, and a home. A location register (HLR) 7 and an intelligent network switch (Service Control Part; hereinafter referred to as SCP ') are provided.

2G network 20 is a base station (BTS, 27) for the control of the base station (27), the base station (BSC, 26) for the wireless section communication with the mobile communication terminal 50 for 2G, 2.5G / 3G, one It is connected to the above-described base station controller 26 and is connected between the 2G exchanger (2G MSC, 24), the public wired network (PSTN, 1) and the 2G exchanger 24 for call exchange to perform network interworking and call exchange with the PSTN (1). It is connected between the 2G gate switch (2G CGS, 22) and the base station controller 26 and the Internet Protocol network (IP Network, 3) for the basic configuration of the packet data serving node (PDSN, 28) for packet data service.

The 3G network 30 controls the Node Bs 37 and Node B 37 as base stations for wireless section communication with the mobile communication terminal 50 for 3G and / or 2G / 2.5G / 3G. Is connected to a radio network controller (RNC) 36, one or more radio network controllers 36, and is connected between a 3G exchanger (3G MSC, 34), a public wired network (PSTN, 1), and a 3G exchanger 34 for call exchange. Connected between the 3G gate switch (GMSC) 32, the radio network controller 36, and the IP network 3 for network interworking and call exchange with the public wired network 10 to monitor the position of the mobile communication terminal 50. It is connected to the SGSN (Serving GPRS Support Node, 40) and IP network (3) to perform security functions and access control functions, interoperates with external packet switch networks, and through the IP-based packet domain PLMN backbone network. The Gateway GPRS Support Node (GGSN) 38 connected to the SGSN 40 is configured as a basic configuration.

The SS7 network 5 interconnects 2G exchanger 24, 2G gate exchange 22, 3G exchanger 34, 3G gate exchange 32, SGSN 40 and GGSN 38 to interconnect each other. Do this. The home location register (HLR) 7 is connected to the SS7 network 5 to integrate and manage a database related to location information such as location registration for 2G / 3G subscribers, and the SCP (9) is connected to the SS7 network 5 Integrated management of network services for 2G / 3G subscribers.

Here, the mobile communication terminal 50 can be used on both sides of the 2G network 20 and 3G network 30 can be provided with services supported by each network (20, 30). To this end, exchangers (2G MSC, 3G MSC) (24, 34) of the 2G network 20 and 3G network 30, the network and the mobile communication terminal 50 in the registration process and call state of the 3G TS 24.008 of the GSM standard The present invention provides service information that can be supported to the mobile communication terminal 50 entering a new service area by applying a message exchange method and a message structure between the calling mobile terminal and the receiving mobile terminal. In addition, the mobile communication terminal 50 displays the services available to the user in the network in the form of a list, a table, or an icon on the terminal screen according to the service information provided by the network. As you move between the networks 30, you can check in real time whether each service is supported.

In order to provide such service information, each network switch (2G MSC, 3G MSC) 24 and 34 stores and manages a list of services supported by their network in a network service table. Upon initial location registration or roaming between networks (or handoff), the network service table is searched according to the request of the mobile communication terminal 50 to notify the mobile communication terminal 50 of service information that can be supported in the current network.

That is, the switch (2G MSC, 3G MSC) (24, 34) of each network is in response to a message received from the mobile communication terminal 50 at the time of initial registration of the mobile communication terminal 50 or after completion of roaming between networks (or handoff). If the service information request flag is added, search the network service table and set whether to support the service in the current network in each service support confirmation bit included in the service information request flag (eg, '1' for service support, service not supported). Time (0)), and when the response to the message received from the mobile communication terminal 50 or the transmission result message is transmitted, the service information response flag with the service support confirmation bit value is added and transmitted. The service information is notified to 50.

In addition, the mobile communication terminal 50 stores and manages information on whether a service is provided in a network currently located with respect to a service list provided by each network in a user service table of an internal memory unit, according to power ON. After initial location registration or completion of manganese roaming (or handoff), the terminal controller (not shown) adds a service information request flag to a predetermined message to check the type of service supported by the current network. The service list of the user service table stored in the internal memory can be updated according to the value of each service support confirmation bit of the service information response flag added to the message transmitted as the response or the processing result. Store and manage service information.

In addition, after updating the user service table, the terminal controller of the mobile communication terminal 50 checks the service list stored in the user service table, and displays the currently supported service information on the terminal screen through a screen display, a table, an icon, or an icon. The format is displayed so that the terminal user can identify available services.

In the network-linked mobile communication system having such a configuration, the service information providing procedure at the time of initial registration of the mobile communication terminal will be described in detail with reference to FIG. 2.

First, when power is supplied to the mobile communication terminal 50 by the terminal user, the mobile communication terminal 50 transmits a signal of the base station 27 or the node B 37 to perform direct RF communication with itself. The receiving network search is performed, and at this time, an initial location registration request is requested to the exchangers (2G MSC, 3G MSC) 24 and 34 of the searched network (step S10). When the registration request is performed, the mobile communication terminal 50 carries information such as its own identification information (IMSI, International Mobile Subscriber Identity), home network, etc. in a registration request message as illustrated in Table 1 below (2G MSC, 3G MSC). (24, 34), but to add the service information request flag (Service Information Request) to determine the type of service that can be supported in the current network is transmitted.

 IMSI or P-TMSI 2. Old RAI 3. Old P-TMSI signature. 4. radio access capability (GSM) 5. ms_network_capability. 6. attch type 7. CKSN 8. DRX parameter 9. Follow on request (UMTS) 10. Service Information Request.

In addition, the exchanges (2G MSC, 3G MSC) 24 and 34 of the network side receiving the registration request message check the identifier (IMSI) of the corresponding mobile communication terminal 50 according to the registration request message information (Identity request). After that (step S12), the MM context is created to perform the mobility management policy and security function (Security Function), and the device access identifier (IMEI) for communication is checked (IMEI Check). (Step S14), the registration operation such as the location information of the mobile communication terminal 50 is reported to a predetermined location register (HLR / VLR) to perform a registration operation (Update Location) (step S16).

In this way, the switchboards (2G MSC, 3G MSC) 24 and 34 that have completed the initial location registration operation for communication with the mobile communication terminal 50 indicate that the initial location registration to the corresponding mobile communication terminal 50 has been successfully completed. After the notification is accepted (step S18), the response is received (step S20).

At this time, the exchange (2G MSC, 3G MSC) (24, 34) is a service information response flag (Attach accept message) sent to the mobile terminal 50 to notify that the initial location registration has been successfully completed (Attach accept Message) Service Information Response) is added to transmit the service information that can be supported in the network. To this end, the exchanges (2G MSC, 3G MSC) 24 and 34 search for the network service table managed by the switch and add it to the service information request flag. Set the service support availability in the current network to each added service support confirmation bit (for example, set '1' when supporting the service and '0' when not supporting the service) to generate the service information response flag, and then register it. In addition to the transmission to the mobile communication terminal 50 to inform the service information that can be supported in the current network.

 1. Attach result 2. Force to standby (GSM) 3. Periodic RA update timer 4. RAI 5. P-TMSI, P-TMSI signature 6. READY timer value (GSM) 7. Identity Type 8. GMM cause 9. T3302 10.Cell Notification (GSM) 11.Equivalent PLMNs 12.Service Information Response

In this regard, the list of services that can be supported in the 2G network 20 and the 3G network 30 described as an example in the present invention is numerous, and comparing the list of services that can be supported in each network, the 2G network 20 and 3G network While there are services that can all be supported in 30, there will be services that are not supported in 2G network 20 but can be supported in 3G network 30 (or vice versa). In addition, the present invention aims to guide service information that can be supported in the network in which the mobile communication terminal 50 is currently located. In the switching units (2G MSC, 3G MSC) 24 and 34 of each network, the following table is provided. Although it is necessary to store and manage all service lists in the network service table as shown in FIG. 3, the mobile communication terminal 50 does not need to store and manage so many service lists in the user service table of the internal memory. It is preferable to store and manage only information on service lists having different services depending on the type in the user service table. For example, video telephony, multimedia message service (MMS), HOLD supplementary service, MPTY supplementary service, AoCI supplementary service, and USSD supplementary service can be supported in the 3G network 30, but not in the 2G network 20. Based on the service, information on whether the service is supported in the current network is stored and managed in the user service table.

8 7 6 5 4 3 2 One Video Telephony MMS SMS WAP FR HR FRS HRS P900 E900 G1800 MBAND VBS VGCS CLIP CLIR COLP COLR CF CCBS HOLD CW MPTY AoCI AoCC BARR USSD ECT Net mode MMS FWD MMS MClass MMS UTF-8

In addition, the mobile communication terminal 50 receiving the registration completion message to which the service information response flag is added from the switchboards (2G MSC and 3G MSC) 24 and 34 has a series of mobile communication services after the initial location registration is completed. (Call, SMS, VT, MMS, WAP, etc.) can be used. In addition, the mobile communication terminal 50 updates the service list in the user service table of the internal memory unit according to each service support confirmation bit value of the service information response flag added to the registration completion message, thereby providing service information that can be supported in the currently located network. It is stored and managed in the user service table.

Thereafter, the terminal controller of the mobile communication terminal 50 checks the service list stored in the user service table of the internal memory unit, and displays information on whether each service is supported in the current network, and more preferably, service information that can be supported in the current network. By controlling the display unit to display on the terminal screen to determine the services available to the terminal user, when the terminal user wants to check the type of service currently provided by the network through a predetermined menu in the standby state of the mobile communication terminal 50 In the form of a list, table, icon, etc., service information provided by the current network is displayed on the terminal screen.In addition, when a terminal user uses a predetermined service, whether or not to use the corresponding service is indicated by an icon, or the corresponding service. Support for other services associated with the It is dropped displayed on the terminal screen. For example, when the terminal user wants to perform a voice call, it may indicate that a video call is possible, and when writing a short message, the terminal screen may display the icon through the icon.

On the other hand, when the mobile communication terminal 50 roams (hands off) from the 3G network 30 to the 2G network 20 or vice versa, the mobile communication terminal 50 is based on a network service table provided by the new network roaming. The user service table of FIG. 2) needs to be updated, and a service information provision procedure is provided with reference to FIG. 3 when roaming (or handing off) between the network switches 24 and 34 and the mobile communication terminal 50 for this purpose. It will be described in detail as follows.

When the mobile communication terminal 50 in a certain network moves to a service area of another network, the mobile communication terminal 50 requests a registration to the roaming network to which the mobile communication terminal has moved according to a general manganese roaming procedure. P10).

In addition, after a series of registrations are completed in the roaming network, the mobile communication terminal 50 transmits a service information request flag to a predetermined message in order to check the types of services supported by the roaming network to which the roaming network has moved. For example, a service information request flag (Service Information Request) is added to a FACILITY message, which is a message for information transmission and reception, and transmitted to the network side (step P12).

Subsequently, the network exchangers (2G MSC, 3G MSC) 24 and 34 receiving the FACILITY message for information transmission and reception set the service information supported by the current network to the service information response flag and then use it as a response message. In addition to the FACILITY message is transmitted to the mobile communication terminal 50, the exchange (2G MSC, 3G MSC) (24, 34) is to search the network service table managed by itself and included in the service information request flag After setting the service support availability in the current network to each service support confirmation bit (e.g., setting '1' when supporting the service and '0' when not supporting the service) to generate a service information response flag (step P14). The service information response flag is added to the FACILITY message for transmitting / receiving information and transmitted to the mobile communication terminal 50 (that is, the roaming mobile communication terminal 50) entering the service area thereof. The terminal user is informed of service information that can be supported in the network (that is, roaming network) currently located (step P16).

In addition, the mobile communication terminal 50 that has received the FACILITY message for transmitting / receiving the information added with the service information response flag from the switch (2G MSC, 3G MSC) 24, 34 transmits each service of the service information response flag added to the message. By updating the list of services in the user service table of the internal memory unit according to the support confirmation bit value, the service information supported in the currently located network is stored and managed in the user service table (step P18). By checking the list, the service information available in the currently registered network is displayed in the form of an icon on the terminal screen so that the terminal user can grasp the available service (step P20).

As described above, the present invention is a mobile communication system in which a second generation network and a third generation network interoperate with each other. The service information provided in the network is provided together with the FACILITY message. Accordingly, the mobile communication terminal displays the service information available in the currently registered network as a list, a table, or an icon.

As described above, the embodiment according to the present invention is not limited to the above, and various modifications can be made within the scope apparent to those skilled in the art in connection with the present invention.

According to the network-linked mobile communication system and the mobile communication terminal and the service information providing method that can provide service information of the present invention as described above, a system in which different generation networks (for example, a second generation network and a third generation network) interoperate with each other. Sends the service information available in the network to the terminal user by adding the service information that can be provided in the network when the registration completion message or the FACILITY message for transmitting / receiving information according to roaming between networks is provided. You will be guided.

Accordingly, the terminal user can easily check the services available in the currently registered network.

Claims (8)

In a mobile communication system in which different generations of networks interwork, It stores and manages the list of supported services in its network in the network service table, and searches for the network service table in response to the request for checking the supported service type and informs the service information currently supported in the network. ; Stores and manages information on whether the service is provided in the currently located network for the service list provided by each network in the user service table of the internal memory unit, and transmits the predetermined message to the network at the time of initial location registration or completion of roaming between networks. Request the service type to check the supported service type, update the service list of the user service table according to the flag added to the message transmitted as the response or the processing result, and store and manage the service information supported by the current network. And a mobile communication terminal which checks a list of services stored in a user service table and displays currently supported service information on a terminal screen. The method of claim 1, The switch of each network searches for a network service table and includes it in the service information request flag when a service information request flag is added to a message received from the mobile communication terminal at the time of initial registration of the mobile communication terminal or after completion of roaming between networks. A service information response flag in which each service support confirmation bit value is set in response to a message received from the mobile terminal or a result of processing a message after setting whether service support in the current network is set to each service support confirmation bit that has been set. The network-linked mobile communication system capable of providing service information, characterized in that to inform the mobile communication terminal the service information that can be supported in the current network by adding and transmitting. In a mobile communication terminal provided with a series of services by performing communication with a switch of each network while moving between different generation networks, A user service table of an internal memory unit for storing and managing information on whether a service is supported in a currently located network; A screen display unit for displaying the service information supported by the current network in the form of a list, a table, or an icon so as to identify a service available to a terminal user on a terminal screen; In order to confirm the type of service supported by the network in which the user is currently located when initial position registration or network roaming is completed, the service information request flag is added to a predetermined message and transmitted to the exchange side of the network, and the response or processing result The service list of the user service table is updated according to each service support confirmation bit value of the service information response flag added to the message transmitted to the message, and the service information stored in the user service table is checked to display the currently supported service information on the screen. And a terminal control unit for controlling the display unit to display the terminal screen. In a method for providing service information in a mobile communication system that interoperates with different generations of networks, Requesting to confirm a service type that can be supported to the network by adding a flag to a predetermined message at the time of initial location registration or completion of roaming between networks in the mobile communication terminal; The exchange side of the network searches the network service table according to the request of the mobile communication terminal, sets the service information supported by the current network to the response flag, and adds it to the message transmitted as a response or processing result to the mobile communication terminal. Transmitting; And updating, by the mobile communication terminal, the user service table according to the response flag added to the message transmitted from the exchange at the network side, and displaying service information supported by the current network on the terminal screen. Method of providing service information in a linked mobile communication system. The method of claim 4, wherein The requesting of the type of service that can be supported to the network side may include: performing a network search for receiving a signal of a base station or a node B of the network side when power is supplied to the mobile communication terminal; Type of service that can be supported by the exchange on the network side by adding a service information request flag to confirm the type of service supported by the network in which the network is currently located in the registration request message transmitted when the initial position registration is requested to the retrieved network side. Service information providing method in a network-linked mobile communication system comprising the step of requesting confirmation. The method of claim 4, wherein The process of requesting confirmation of the type of service that can be supported by the network may include: requesting registration to a roaming network to which the mobile communication terminal has moved according to a network roaming procedure when the mobile communication terminal moves to a service area of another network; After a series of registrations are completed in the roaming network, the mobile communication terminal adds and transmits a service information request flag to an information transmission / reception message to confirm the type of service supported by the roaming network. The service information providing method in a network-linked mobile communication system comprising the step of requesting confirmation of the type. The method of claim 4, wherein In the process of adding a response flag in which the service information supported by the current network is set to the message and transmitting the message to the mobile communication terminal, requesting the message transmitted from the mobile communication terminal by the exchange side of the network requests confirmation of the type of service supported by the current network. Checking whether a service information request flag is added; If the service information request flag is added, the service information response flag is set by searching the network service table managed by the service information and setting the service support availability in the current network to each service support confirmation bit included in the service information request flag. Generating; And informing the mobile communication terminal of the service information that can be supported in the current network by adding the generated service information response flag to the message transmitted as a response or processing result and transmitting the message. How to provide service information in the system. The method of claim 4, wherein The process of displaying, on the terminal screen, service information currently supported by the mobile terminal in the mobile terminal, the user according to each service support confirmation bit value of the service information response flag included in the message transmitted from the exchange of the network side in the mobile communication terminal. Updating a service list of a service table to store and manage service information that can be supported in a currently located network; Checking the list of services stored in the user service table and displaying service information supported by the current network on a terminal screen in a list, table, or icon format. Way.

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