KR20050013848A - Method and System for Providing Supplementary Service on Call Busy During Call Attempt in Mobile Communication Network - Google Patents

Abstract

PURPOSE: An additional service method and a system when a receiver is busy on the phone are provided to supply an additional service including an SMS text message service to an originator if a receiver is busy on the phone, by calling the receiver, thereby sending a message of the originator even though the receiver is busy on the phone. CONSTITUTION: An additional service server(240) stores a ring time for an additional service and set contents of the additional service, and supplies an SMS text message service or a voice mail box service to an originator after the ring time, if a receiver is busy on the phone during a call request of the originator. A mobile terminal(210) wirelessly accesses the additional service server(240) to set the ring time and the desired additional service, and receives the SMS text message service and/or the voice mail box service after the ring time when a call is received in busy state. An additional service DB(242) stores the ring time and the set contents of the service, and stores SMS text data or voice message data. An SMS center(250) receives a message from the originator to convert into an SMS message, and transmits the SMS message to the receiver.

Description

Method and System for Providing Supplementary Service on Call Busy During Call Attempt in Mobile Communication Network}

The present invention relates to an additional service method and system during an incoming call. More specifically, the present invention relates to an additional service method and system during a call when a call is attempted to provide an additional service including an SMS text message service to the calling party when the called party makes a call from the calling party to the called party.

In the mobile communication network, the calling party makes a call from the calling party to the called party and, when the called party is busy, provides a voice mail service or an answering service to the calling party.

1 is a configuration diagram schematically showing a configuration of a conventional mobile communication system providing a standby service during a call.

The conventional mobile communication system 100 has a configuration including a mobile terminal 110, a wireless base station 120, a mobile switching center 130, a voice mailbox server 140, a mailbox database 142 and the like.

The mobile terminal 110 is a calling terminal that receives an answering service and a voice mail service when the other party calls through the mobile communication network and the other party is busy.

Wireless base station 120 includes a base station transmitter 122 and a base station controller 124. It may be a calling base station because it processes a call to the calling mobile terminal 110, but may also be a called base station because it processes a call of a called mobile terminal. A base transceiver station (BTS) 122 receives a call request signal from the mobile terminal 110 through a traffic channel of a signal channel and transmits the received call request signal to the base station controller 124. . In addition, the base station transmitter 122 is a network endpoint device that is wirelessly connected to the mobile terminal 110 by performing baseband signal processing, wired / wireless conversion, and transmission and reception of wireless signals.

A base station controller (BSC) 124 controls the base station transmitter 122, and allocates and releases radio channels for the mobile terminal 110, and controls transmission outputs of the mobile terminal 110 and the base station transmitter 122. Soft handoff and hard handoff decisions, transcoding and vocoding, global positioning system (GPS) clock distribution, and operation and maintenance capabilities for base stations. To perform. The base station controller 124 transmits the call request signal received through the base station transmitter 122 to the mobile switching center 130.

The mobile switching center 130 performs basic and additional service processing, incoming and outgoing call processing of subscribers, location registration and handoff procedures, and interworking with other networks. In addition, when the called party is busy when the call request signal is processed by the mobile terminal 110, the call request signal of the mobile terminal 110 is transmitted to the voice mailbox server 140 to transmit an answering service and a voice mailbox service to the mobile terminal ( 110).

When the voice mailbox server 140 receives a call request signal from the mobile terminal 110, the voice mailbox server 140 provides an auto response service to the mobile terminal 110, and selects a voice mailbox menu from the mobile terminal 110. It provides a voice mailbox service to the mobile terminal (110).

The mailbox database 142 stores voice data input from the mobile terminal 110 together with the called party number.

In the conventional mobile communication system 100 configured as described above, when the called-party mobile terminal is busy when the user operates the mobile terminal 110 to make a call to the called party and requests a call, the mobile switching station 130 is connected to the mobile terminal ( The call waiting sound is transmitted to the voice mailbox server 140 as well as the call waiting sound of the mobile terminal 110. If the voice mailbox server 140 has a voice message indicating that the mobile terminal 110 is busy and a message to be delivered to the called party through an answering service to the mobile terminal 110 in response to the call request signal of the mobile terminal 110, Provide a voice message to record. Accordingly, when there is a message to be delivered to the called party, the user of the mobile terminal 110 records a voice message to be delivered to the called party by using the voice mailbox service, and the voice mailbox server 140 is input from the mobile terminal 110. The voice message is stored in the mailbox database 142 together with the called party number.

After that, when the call of the called mobile terminal is terminated, the voice mailbox server 140 transmits a text message indicating that there is a voice message to the called mobile terminal, or makes a call to the called mobile terminal to the voice mailbox. An automatic reply message informs you that a delivery message exists. The called party's mobile terminal wirelessly accesses the voice mailbox server 140 and checks the forwarded message stored in its voice mailbox.

That is, in the conventional mobile communication system 100 operating in the above process, when the called mobile terminal is busy when a call is made from the calling mobile terminal to the called mobile terminal, a ring timer By sending the announcement according to the voice mailbox service or the answering service to the calling mobile terminal according to the set time for each system, the calling telephone number or the forwarding message is left and the call connection is terminated.

In this way, the calling party must inform the called party in an urgent event, but if there is no time left to leave a voice message, or leave only the calling number, the situation is over. Cases may occur. At this time, using the voice mail service according to the answering service as described above may be very cumbersome or useless at the end of the situation. Therefore, there is a need for a technology that can notify the caller of a call even when the called mobile terminal is busy without going through a cumbersome process using a voice mailbox.

The present invention for solving the above problems, to provide an additional service method and system of the called party to provide additional services, including SMS text message service to the calling party when the called party is called from the calling party to the called party. The purpose is.

1 is a configuration diagram schematically showing the configuration of a conventional mobile communication system for providing a waiting service during a call;

2 is a configuration diagram schematically showing a configuration of an additional service system during a called party according to an embodiment of the present invention;

3 is a block diagram schematically illustrating an internal configuration of an additional service server;

4 is a flowchart illustrating an additional service method during a call according to an embodiment of the present invention.

※ Explanation of codes for main parts of drawing

100: mobile communication system 110: mobile terminal

120: wireless base station 122: base station transmitter

124: base station controller 130: mobile switching center

132: HLR 134: VLR

140: Voice Mailbox Server 142: Mailbox Database

200: additional service system 210: calling party mobile terminal

212: called mobile terminal 220: called wireless base station

222: terminating base station transmitter 224: terminating base station controller

230: called party mobile switching center 232: called party HLR

240: additional service server 242: additional service database

250: SMS Center

The present invention for achieving the above object is an additional service system of the called party to provide an additional service including an SMS text message service to the calling party when the called party makes a call from the calling party to the called party. It stores the ring time and the setting of the additional service for the call, if the called party is busy when the call request of the calling party, to provide an SMS text message service or voice mail service to the calling party after the set ring time An additional service server; In addition to performing a wireless telephone call through a mobile communication network, wirelessly access the supplementary service server for the supplementary service, set the ring time and the desired supplementary service for its own terminal, and when a call is received during a call. A mobile terminal receiving the SMS text message service and / or the voice mailbox service from the additional service server after the set ring time; In addition to storing the ring time and setting contents of the supplementary service, SMS text data created by the mobile terminal according to the SMS text message service or voice message data input from the mobile terminal according to the voice mailbox service are stored. Supplementary service database; And an SMS center receiving the transmission message from the calling party, converting the SMS message into an SMS message, and transmitting the SMS message to the called party.

In addition, according to another object of the present invention, a caller from the calling party to the called party as an additional service method of the called party to provide an additional service including an SMS text message service to the calling party when the called party is busy, the calling party A first step of receiving call connection request data for the called party from the network; A second step of transmitting the call connection request data to a called-party mobile switching center which has jurisdiction over the called-party to inquire whether a call connection is possible with the called-party; A third step of receiving a busy signal for the called party from the called party mobile switching center; A fourth step of transmitting the call connection request data to an additional service server; A fifth step of determining, by the additional service server, the additional service setting of the called party based on the call connection request data; A sixth step of requesting the calling party to input a text message to be forwarded when the additional service setting of the called party is set to the SMS text message service; And a seventh step of converting the text message input from the calling party into an SMS text message through an SMS center and transmitting the converted text message to the called party.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. First of all, in adding reference numerals to the components of each drawing, it should be noted that the same reference numerals are used as much as possible even if displayed on different drawings. In addition, in describing the present invention, when it is determined that the detailed description of the related well-known configuration or function may obscure the gist of the present invention, the detailed description thereof will be omitted.

2 is a block diagram schematically showing the configuration of the additional service system 200 during the called party call according to an embodiment of the present invention.

The additional service system 200 according to the present invention includes the calling mobile terminal 210, the called mobile terminal 212, the calling wireless base station 120, the calling mobile switching center 130, and the called wireless base station 220. , Called party's mobile switching center 230, additional service server 240, additional service database 242, SMS center 250 and the like.

The calling mobile terminal 210 and the called mobile terminal 212 not only perform a wireless telephone call through a mobile communication network, but also provide a ring time and additional services for their own terminals to the additional service server 240. After setting, if a call is received during a call, the terminal receives an additional service after the set ring time.

Mobile terminals 210 and 212 according to an embodiment of the present invention are PDA (Personal Digital Assistant), cellular phone, PCS (Personal Communication Service) phone, GSM (Global System for Mobile) phone, W-CDMA (Wideband CDMA) phone , CDMA-2000 phone, MBS (Mobile Broadband System) phone and the like. Here, MBS phone refers to a mobile phone to be used in the fourth generation system that is recently discussed.

The destination radio base station 220 performs the same function as the source radio base station 120 described with reference to FIG. 1, and similarly includes a base station transmitter 222 and a base station controller 224. Here, the base station transmitters 122 and 222 are arranged in units of cells, respectively, and transmit call requests generated from the mobile terminals 210 and 212 to the mobile switching centers 130 and 230, or in a cell area of their own control. Location registration is performed to determine the locations of existing mobile terminals 210 and 212. The base station transmitters 122 and 222 may obtain information such as latitude and longitude at which the base station transmitters 122 and 222 are located from a global positioning system (GPS) (not shown), and the position information of the base station transmitters 122 and 222. Is transmitted to the mobile terminals 210 and 212 through the system parameter message of the forward link call channel. The mobile terminals 210 and 212 may register new location information by calculating the moving distance of the mobile terminals 210 and 212 using the location information of the base station transmitters 122 and 222 of the cell to which they belong.

Location registration is a processing procedure that informs the mobile switching center 130, 230 of the location, status, identifier, slot period, and other features of the mobile terminal 210, 212 via the base station transmitters 122, 222. 122 and 222 is a procedure for effectively calling the mobile terminal (210, 212) when you want to set the incoming call to the mobile terminal (210, 212). The location registration of the mobile terminals 210 and 212 may be performed when the mobile terminals 210 and 212 are powered on or off, when the mobile terminals 110 move between the mobile switching centers 130, and the mobile terminals 210. , 212).

The base station controllers 124 and 224 perform various functions necessary for radio call processing such as handoff while controlling and managing a plurality of base stations. The base station controllers 124 and 224 also transmit the subscriber information of the location registered mobile terminals 210 and 212 to the mobile switching centers 130 and 230.

The mobile switching center (130, 230) has a control function to enable the wireless base station (120, 220) to operate efficiently and the interworking function with the switch of the public telephone network. When the mobile switching center (130, 230) registers the location of the mobile terminal (210, 212) via the wireless base station (120, 220), the visitor location register (VLR) in the mobile switching center (130, 230) Temporarily storing the subscriber information of the mobile terminal 210, 212 in the "VLR" (134, 234), and then the Home Location Register (HLR) (132, 232) Request location registration of the mobile terminals 210 and 212.

Here, the HLRs 132 and 232 are databases storing service profiles related to subscriber information of the users of the mobile terminals 210 and 212, and include terminal identification numbers of the mobile terminals 210 and 212 including the subscriber's telephone call. It has information on Mobile Identification Number (MIN), Electronic Serial Number (ESN) and service type. The HLRs 132 and 232 perform a function of storing subscriber information including information of the wireless base stations 120 and 220 and the mobile switching centers 130 and 230 in which the mobile terminals 210 and 212 are located. The mobile switching center (130, 230) is composed of a control unit, a call path unit and a peripheral device, and also has a charging data collection function for the mobile terminal (210, 212).

The additional service server 240 allocates storage areas for voice mailbox services of the calling mobile terminal 210 and the called mobile terminal 212, respectively, and sends the calling mobile terminal 210 and the called mobile terminal 212. The ring time for the additional service set by the user and the setting contents of the additional service are stored, and the set ring time when the called mobile terminal 212 is busy when the call of the calling mobile terminal 210 is called Later, the calling mobile terminal 210 provides a set additional service such as an SMS text message service or a voice mailbox service. Of course, when the calling mobile terminal 210 is in a call when the called mobile terminal 212 requests a call, the additional service is provided to the called mobile terminal 212 making the call request.

The supplementary service database 242 stores ring time and supplementary service contents set by the calling mobile terminal 210 and the called mobile terminal 212, and the SMS text data according to the SMS text message service or voice mail service. Voice message data is being stored.

The SMS center 250 receives a transmission message from the calling party, converts the SMS message into an SMS message, and sends the message to the receiving party.

3 is a block diagram schematically illustrating an internal configuration of the additional service server 240.

The additional service server 240 may include a program storage 310, a memory 320, a controller 330, a display 340, a communicator 350, a database server 360, a key input unit 370, and the like.

The program storage unit 310 stores the ring time for the additional service set by the calling mobile terminal 210 and the called mobile terminal 212 and the setting contents of the additional service and stores the setting contents of the calling mobile terminal 210. When the called mobile terminal 212 is busy during the call request, after the set ring time, an additional service program that provides the set additional service such as SMS text message service or voice mail service to the calling mobile terminal 210 is stored. .

The additional service program may be implemented in various ways according to the operating system (OS) of the additional service server 240. For example, the 'C' programming language or the object-oriented 'C ++', 'Java' programming language, and 'ASP' It can be implemented in web programming language such as 'PHP'.

The memory 320 temporarily stores data processed by the controller 330 or temporarily stores input data received from the mobile terminals 210 and 212.

The control unit 330 controls the overall apparatus of the additional service server 240, and in particular, sets the ring time and additional service settings for the additional service set by the calling mobile terminal 210 and the called mobile terminal 212. If the called mobile terminal 212 is busy when the call is requested by the calling mobile terminal 210, the calling mobile terminal 210 may set an SMS text message service or a voice mailbox service after the set ring time. Control the functions that provide additional services.

The display unit 340 displays various situations or data for monitoring by an administrator managing the additional service server 240, and displays not only the processing status according to the key input from the key input unit 370, but also the additional service processing status. do.

The communication unit 350 is a communication module that provides a communication interface for communication with the mobile switching centers 130 and 230 and the SMS center 250.

The database server 360 controls data input and output of the additional service database 242. The database server 360 functions to update and store data input from the key input unit 370 in the additional service database 242 under the control of the controller 330, or to store a voice message transmitted from the mobile terminal. . In addition, when a request for outputting a voice message stored in a corresponding mailbox of the additional service database 242 from the key input unit 370 is performed, the voice message is read from the additional service database 242 and output.

The database server 360 is a software program of the additional service server 240 using, for example, an "Oracle9i DB Release 2" server program of Oracle or a server program of "MS-SQL Server 2000" of Microsoft Soft. Is installed as

The key input unit 370 is used to input data when the administrator manually adds or updates the information content of the additional service server 240. In addition, when updating the additional service program of the program storage unit 310, or when updating the database server 360 program is used for data input.

Next, an operation of the additional service system 200 configured as described above will be described.

When the user is located at a certain place with the calling mobile terminal 210 or the called mobile terminal 212, the calling mobile terminal 210 or the called mobile terminal 212 is located in the region where the user is currently located. The location registration is performed for the wireless base station that manages the network. This location registration process is a well-known technique known in the art, so the detailed process is omitted.

With the location registration for the wireless base station completed, the calling mobile terminal 210 or the called mobile terminal 212 is set to the telephone call mode so that it can normally make a call or talk to an incoming call. have.

First, a process of setting a supplementary service to be used during a call by connecting a supplementary service server 240 to a user of the called-party mobile terminal 212 will be briefly described.

The called-party mobile terminal 212 selects an additional service setting menu from among a plurality of menus provided by the terminal itself and accesses the additional service server 240.

The additional service server 240 provides a menu for selecting a service such as "1. ring time setting 2. additional service setting" when the called-party mobile terminal 212 connects.

The called party's mobile terminal 212 first selects a ring time setting menu. The additional service server 240 provides a submenu for ring time setting when the called-party mobile terminal 212 selects a ring time setting menu. Here, the sub menu for the ring time is a menu such as "1. Full Time 2. Half Time 3. Quarter Time".

The called party's mobile terminal 212 having set the ring time then selects the additional service menu. The additional service server 240 provides an additional menu for the additional service when the called-party mobile terminal 212 selects the additional service menu. Here, the submenu for the additional service is a menu such as "1. Only SMS 2. Only VMS 3. Dual SMS + VMS".

The called-party mobile terminal 212 sets "1. Only SMS" to make an SMS text message at the calling side when its terminal is busy.

The additional service server 240 stores the contents set by the called mobile terminal 212, that is, the contents of the ring time setting and the additional service setting, together with the number of the called mobile terminal 212 in the additional service database 242. Put it.

4 is a flowchart illustrating an additional service method during a call according to an embodiment of the present invention.

In the embodiment of the present invention, for convenience of description, the user of the calling party mobile terminal 210 makes a call to the user of the called party mobile terminal 212, and the called party mobile terminal 212 will be described as an example. do.

In the standby state of the calling mobile terminal 210, the user enters a telephone number to make a call to the called mobile terminal 212, and enters a "Send" button which is a call connection request command for a telephone call. The calling mobile terminal 210 generates call connection request data and transmits it as a radio signal.

Therefore, call connection request data is transmitted from the calling mobile terminal 210 to the calling mobile switching center 130 through the calling wireless base station 120 as a radio signal. Here, the call connection request data includes the telephone number of the calling mobile terminal 210 and the telephone number of the called mobile terminal 212.

When the originating mobile switching center 130 receives the call connection request data transmitted from the calling mobile terminal 210 (S402), the calling mobile switching center transmits the call connection request data based on the location information of the HLR 132 (the called mobile switching center). 230 and inquires whether a call connection is possible with the called-party mobile terminal 212 (S404).

The called party mobile switching center 230 queries the called party wireless base station 220 for a call connection state with respect to the called party mobile terminal 212 based on the call connection request data. The called party wireless base station 220 transmits a busy signal indicating that the called party mobile terminal 212 is in a call connection state with another mobile terminal because it is in a call connection state to the called party mobile switching center 230. The destination mobile switching center 230 transmits a busy signal for the destination mobile terminal 212 to the calling mobile switching center 130.

The calling party mobile switching station 130 receives the busy signal for the called mobile terminal 212 from the called mobile switching center 230, and if it is determined that the called mobile terminal 212 is busy (S406). The call connection request data of the calling mobile terminal 210 is transmitted to the service server 240 (S408). Here, the call connection request data includes a number of the calling mobile terminal 210 and a number of the called mobile terminal 212.

The additional service server 240 checks the additional service information set by the called-party mobile terminal 212 through the additional service database 242 based on the call connection request data. The additional service server 240 confirms that "1. Only SMS" is set for the called-party mobile terminal 212 and requests input of an SMS text message to be sent to the calling-party mobile switching center 130 (S410). .

When the calling mobile switching center 130 receives an input request for forwarding SMS text message from the additional service server 240, it transmits a voice message requesting to input the SMS text message to be forwarded to the calling mobile terminal 210 (S412). ).

The calling mobile terminal 210 inputs an SMS text to be delivered to the called mobile terminal 212 through key input (S414). Data on the SMS text created and sent by the calling mobile terminal 210 is transmitted to the calling mobile switching center 130 via the calling wireless base station 120.

When the calling party mobile station 130 receives the data for the SMS text from the calling party mobile terminal 210, it converts the SMS text message through the SMS center 250 and delivers it to the called party mobile switching center 230. The mobile switching center 230 transmits the SMS text message to the destination mobile terminal 212 via the destination wireless base station 220 through another paging channel or traffic channel that is not currently used by the destination mobile terminal 212. Send to (S416).

Meanwhile, the called-party mobile terminal 212 receives an SMS text message transmitted from the calling-party mobile terminal 210 but is displayed on the screen while in communication with another mobile terminal. Therefore, the user of the called-party mobile terminal 212 can check the transmission contents transmitted from the calling-party mobile terminal 210 through the SMS text mesh displayed on the screen.

According to an embodiment of the present invention, it is possible to realize an additional service method and system during a called party call so as to provide additional services including an SMS text message service to the calling party when the called party makes a call from the calling party to the called party.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and changes without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical idea of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

As described above, according to the present invention, even if the called party is busy, the calling party can transmit the contents to the called party. In addition, even if the called party is busy, the SMS can be notified of the calling party's situation by SMS text message without going through a cumbersome process using the voice mailbox.

Claims (15)

An additional service system of a called party that provides an additional service including an SMS (Short Message Service) text message service to the calling party when the called party makes a call from the calling party to the called party. The Ring Time for the supplementary service and the setting contents of the supplementary service are stored, and when the called party is busy during the call request of the calling party, an SMS text message service is performed to the calling party after the set ring time. Or an additional service server that provides a voice mailbox service; In addition to performing a wireless telephone call through a mobile communication network, wirelessly access the supplementary service server for the supplementary service, set the ring time and the desired supplementary service for its own terminal, and when a call is received during a call. A mobile terminal receiving the SMS text message service and / or the voice mailbox service from the additional service server after the set ring time; In addition to storing the ring time and setting contents of the supplementary service, SMS text data created by the mobile terminal according to the SMS text message service or voice message data input from the mobile terminal according to the voice mailbox service are stored. Supplementary service database; And SMS center that receives the transmission message from the calling party, converts it into an SMS message, and transmits it to the called party Additional service system of the called party, characterized in that it comprises a. The method of claim 1, The mobile terminal is a PDA (Personal Digital Assistant), cellular phone, PCS (Personal Communication Service) phone, GSM (Global System for Mobile) phone, W-CDMA (Wideband CDMA) phone, CDMA-2000 phone, MBS (Mobile Broadband System) The additional service system of the called party, characterized in that it comprises a phone. The method of claim 1, The mobile communication network may include: a mobile switching station that performs a control function for efficiently operating the mobile communication network and an exchange function for a call request of the mobile terminal; A base station transmitter arranged in units of cells and configured to transmit the call request generated from the mobile terminal to the mobile switching center or to locate a location of the mobile terminal existing in a cell area under its control; And And a base station controller which performs various functions required for wireless call processing including handoff while controlling and managing a plurality of base stations, and transmits subscriber information of the location-registered mobile terminal to the mobile switching center. Of value added service system. The method of claim 3, wherein When the mobile switching center registers the location of the mobile terminal through the wireless base station, temporarily stores subscriber information of the mobile terminal in a visitor location register (VLR) in the mobile switching center, and then registers a home location register. An additional service system of a called party, characterized in that for requesting location registration of the mobile terminal with a home location register (HLR). The method of claim 4, wherein The home location register (HLR) stores a service profile regarding subscriber information of a user of the mobile terminal, and includes a mobile phone number of the mobile terminal, a mobile identification number (MIN), and a terminal unique number (Electronic Serial). Number: ESN) and service type, and the additional service during the called party, characterized in that for storing the subscriber information including the information of the wireless base station and the mobile switching station where the mobile terminal is located; system. The method of claim 1, The additional service server stores the ring time for the additional service set by the mobile terminal and setting contents of the additional service, and sets the ring when the called party is in a call when the calling party requests a call. A program storage unit for storing an additional service program for providing the additional service set to the SMS text message service and / or voice mail service to the calling party after time; It controls the overall device of the additional service server, and stores the ring time and the setting of the additional service set for the additional service set by the mobile terminal, when the called party is in a call when the call request of the calling party is busy. A control unit for controlling a function of providing the set of supplementary services of the SMS text message service and / or the voice mail service to the calling party after the set ring time; A memory for temporarily storing data processed by the controller or temporarily storing input data received from the mobile terminal; A display unit which displays various situations or data for monitoring by an administrator who manages the additional service server and displays a processing status of the additional service; A communication unit providing a communication interface for communication with the mobile communication network and the SMS center; Control data input / output of the additional service database, and update and store data input from the mobile terminal in the additional service database under the control of the controller, or store a voice message transmitted from the mobile terminal; And a database server configured to read and output the voice message from the supplementary service database when the voice message stored in the corresponding mailbox of the supplementary service database is requested to be output. And Key used for data input when the information content of the additional service server is manually added or updated, and used for data input when updating the additional service program or when updating the program of the database server. Additional service system of the called party, characterized in that it comprises an input unit. The method of claim 6, The supplementary service program may be an object-oriented programming language including 'C' programming language, 'C ++' or 'Java', or a web including 'ASP' or 'PHP' according to an operating system (OS) of the supplementary service server. An additional service system of a called party, characterized in that implemented in a programming language. The method of claim 6, The database server is an Oracle "ira 9i DB Release 2" server program of Oracle Corporation or a server program of "MS-SQL Server 2000" of Microsoft Soft Corporation. Additional service system of the called party, characterized in that. The method of claim 1, The set additional service is only the SMS text message service, the voice mail service only, or the SMS text message service + the voice mail service, the additional service system of the called party. An additional service method of a called party that makes a call from a calling party to a called party and provides an additional service including an SMS (Short Message Service) text message service to the calling party when the called party is busy. A first step of receiving call connection request data for the called party from the calling party; A second step of transmitting the call connection request data to a called-party mobile switching center which has jurisdiction over the called-party to inquire whether a call connection is possible with the called-party; A third step of receiving a busy signal for the called party from the called party mobile switching center; A fourth step of transmitting the call connection request data to an additional service server; A fifth step of determining, by the additional service server, the additional service setting of the called party based on the call connection request data; A sixth step of requesting the calling party to input a text message to be forwarded when the additional service setting of the called party is set to the SMS text message service; And And a seventh step of converting the text message input from the calling party into an SMS text message through an SMS center and transmitting the converted text message to the called party. The method of claim 10, In the fifth step, the additional service is set up together with a ring time by connecting the additional service server through a mobile communication network using a mobile terminal. The method of claim 10 or 11, The supplementary service is an SMS text message service only, a voice mail service only, or the SMS text message service + the voice mail service, the additional service method of the called party. The method of claim 10, In the fifth step, when the set additional service is a voice mailbox service, a guide message requesting input of a voice message to be transmitted is transmitted to the calling party, and when a voice message to be delivered from the calling party is input, the voice message is sent. The additional service method of the called party, characterized in that it is stored in the additional service database with the number of the called party to receive. The method of claim 11, The mobile communication network includes: a mobile switching station that performs a control function for efficiently operating the mobile communication network and a switching function for a call request of the calling party or the called party; A base station transmitter arranged in units of cells and performing location registration by transmitting the call request generated from the calling party to the mobile switching center or identifying a location of the calling party existing in a cell area under its control; And A base station controller which performs various functions required for radio call processing including handoff while controlling and managing a plurality of base stations, and transmits subscriber information of the originating party registered with the location to the mobile switching center. Of additional services. The method of claim 14, The mobile switching center temporarily stores the calling party's subscriber information in a visitor location register (VLR) in the mobile switching center when the location registration of the calling party is performed through the wireless base station. And a home location register (HLR) for requesting location registration of the calling party.