KR20040016727A - System for service of voice telephone call and voice messenger using mobile communication data network and method - Google Patents

Abstract

PURPOSE: A bidirectional voice call and voice messenger service system using a mobile communication network and a method therefor are provided to inexpensively transmit and receive a voice message. CONSTITUTION: An origination-side mobile terminal(1a) records the voice of a subscriber, composes voice message data including the voice of the subscriber, and transmits the voice message data. At least one or more termination-side mobile terminals(1b,1c) receive the voice message data. An LDWT(Long Distance Worky-Talky) server(5) controls a bidirectional communication between the origination-side mobile terminal(1a) and the termination-side mobile terminals(1b,1c).

Description

Two-way voice call and voice messenger service system using mobile communication data network and method thereof {SYSTEM FOR SERVICE OF VOICE TELEPHONE CALL AND VOICE MESSENGER USING MOBILE COMMUNICATION DATA NETWORK AND METHOD}

The present invention relates to a two-way voice call and voice messenger service system and method using a mobile communication data network to enable the transmission and reception of voice messages at low cost. In addition, the present invention relates to a two-way voice call and voice messenger service system and method using a mobile communication data network capable of inexpensively transmitting and receiving multimedia data such as moving pictures, still pictures, music files. The invention also relates to a mobile terminal capable of voice recording and suitable for transmitting the recorded voice message data.

In general, a mobile communication system transmits a voice signal using a voice channel and transmits data using a data channel. Here, the audio signal is charged according to time and the data is charged according to the data amount.

Mobile subscribers are using the Short Messege Service (SMS), which is relatively inexpensive when it is necessary to deliver a short message to the other party. However, the short message service has disadvantages in that the subscriber has to repeatedly press a key to create a desired character string and delays the message transmission by the time required for key typing.

Accordingly, mobile communication service providers are conducting research to improve a message transmission method in response to the needs of subscribers for convenient delivery of messages at low cost. Furthermore, mobile communication service providers are able to transmit and receive multimedia data such as video and music files. In recent years, mobile communication service providers are not only transmitting and receiving text information but also various types of subscriber's voice and multimedia data. We are researching message transmission technology that can transmit and receive information at low cost.

Accordingly, it is an object of the present invention to provide a two-way voice call and voice messenger service system and a method using a mobile communication data network which can transmit and receive voice messages at low cost.

Another object of the present invention is to provide a two-way voice call and voice messenger service system and a method using a mobile communication data network which can transmit and receive multimedia data such as moving pictures, still pictures, music files at low cost.

It is another object of the present invention to provide a mobile terminal capable of voice recording and suitable for transmitting the recorded voice message data.

1 is a diagram schematically illustrating a two-way voice call and voice messenger service system using a mobile communication data network according to an embodiment of the present invention.

FIG. 2 is a circuit diagram illustrating in detail the mobile terminal shown in FIG. 1.

3 is a connection state diagram illustrating a connection between the LDWT server and the mobile terminal shown in FIG.

FIG. 4 is a signal flow diagram illustrating the signal flow between the LDWT server and the mobile terminal shown in FIG. 1 step by step.

<Short description of the symbols in the drawings>

1a, 1b, 1c: mobile terminal 2a, 2b: base station

3: exchange network 4: mobile communication packet network

5: LDWT Server 6: Home Location Register (HLR)

7: Voice Mail Service Center (VMS) 8: Short Message Center (SMSC)

9: Internet Network 10: Wired Terminal

21: antenna 22: RF unit

23: modulator / demodulator 24: codec

25 control unit 26 display unit

27: keypad

In order to achieve the above objects, a two-way voice call and voice messenger service system according to an embodiment of the present invention includes a calling party mobile terminal for recording voice data of a subscriber and constructing voice message data including the voice to transmit voice message data. ; At least one destination terminal for receiving voice message data; And a server for controlling bidirectional communication between the calling mobile terminal and the called terminal.

In the two-way voice call and voice messenger service system according to an embodiment of the present invention, the voice message data is attached with multimedia data including at least one of video data, still image data, and music file data.

The two-way voice call and voice messenger service system according to an embodiment of the present invention further includes a mobile communication packet network and a switching network for relaying data transmission and reception between the calling mobile terminal and the server.

In the two-way voice call and voice messenger service system according to an embodiment of the present invention, the server stores a buddy list including the location information of the registered subscriber, the communication availability information of the registered subscriber, the communication status of the registered subscriber; The buddy list is supplied to the calling mobile terminal in response to a request of the calling mobile terminal.

In the two-way voice call and voice messenger service system according to an embodiment of the present invention, the server transmits a short message for notifying reception of voice message data to the called terminal before transmitting the voice message data to the called terminal. do.

In the two-way voice call and voice messenger service system according to an embodiment of the present invention, a short message is assigned an identification code for identifying voice message data.

The two-way voice call and voice messenger service system according to an embodiment of the present invention further includes a short message service center for receiving a short message and transmitting the short message to a called terminal under the control of a server.

According to an embodiment of the present invention, a two-way voice call and voice messenger service system includes: a home location register for notifying the server of a current location of a called terminal in response to a request of a server; And a voice mail service center for storing data to be transmitted to the called terminal under the control of the server and transmitting the stored data to the called terminal in response to a request of the called terminal.

A two-way voice call and voice messenger service method according to an embodiment of the present invention includes the steps of recording a subscriber's voice to a calling mobile terminal and transmitting voice message data including the voice; Receiving voice message data at at least one destination terminal; And transmitting voice message data through a data communication channel when the voice message data is transmitted and received, and controlling call initiation, data transmission, and call termination between the calling mobile terminal and the called mobile terminal.

In the two-way voice call and voice messenger service method according to an embodiment of the present invention, when the call is initiated between the calling mobile terminal and the called mobile terminal, the data transmission and the call termination are controlled by the calling subscriber. A first step of requesting a buddy list including the location information of the called party, whether the called party is available for communication, and the communication status of the called party; In response to a request from a calling mobile terminal, transmitting a current status of a buddy list and a called subscriber to the calling mobile terminal; A third step of the calling mobile terminal requesting a call view; A fourth step of transmitting, to the called terminal, an alarm short message in which an identification code for identifying voice message data is assigned to the called terminal in response to the call diagram message; A fifth step of the called terminal generating a message in response to the alarm short message; A sixth step of, when the calling mobile terminal receives a response message, establishing a data communication channel for transmitting voice message data between the calling mobile terminal and the called terminal; Transmitting a voice message data received from the calling mobile terminal to the called terminal and delivering the voice message data received from the called terminal to the calling mobile terminal; And an eighth step of switching a data communication channel between the calling mobile terminal and the called terminal in response to a call termination message generated from at least one of the calling mobile terminal and the called terminal.

The two-way voice call and voice messenger service method according to an embodiment of the present invention further includes attaching multimedia data including at least one of video data, still image data, and music file data to the voice message data.

In the two-way voice call and voice messenger service method according to an embodiment of the present invention, the data capacity of voice message data transmitted once through a data communication channel is limited to a specific data capacity.

In the two-way voice call and voice messenger service method according to an embodiment of the present invention, the first and second steps are omitted.

In the two-way voice call and voice messenger service method according to an embodiment of the present invention, the voice message data is transmitted to the called terminal at the same time as the call of the calling mobile terminal.

The two-way voice call and voice messenger service method according to an embodiment of the present invention further includes transmitting a short message for notifying reception of voice message data to the called terminal before transmitting the voice message data to the called terminal.

In a two-way voice call and voice messenger service system and method according to an embodiment of the present invention, the called terminal is one of a mobile terminal connected to a mobile communication network and a wired terminal connected to a wired communication network.

In the two-way voice call and voice messenger service system and method according to an embodiment of the present invention, the called terminal is set in plurality by selection of the calling mobile terminal.

The mobile terminal for a two-way voice call and voice messenger service according to an embodiment of the present invention includes a key set for voice recording of a subscriber; Voice recording means for recording the subscriber's voice while the key is on; And transmitting and receiving means for transmitting and receiving recorded voice message data.

In a mobile terminal for a two-way voice call and voice messenger service according to an embodiment of the present invention, the voice recording means includes a microphone for converting a subscriber's voice into an electrical signal while the key is kept on; A codec for converting a subscriber's voice signal into digital data, compressing the voice signal to generate voice message data, and converting data from a transmission / reception means into an analog form; A memory for storing voice message data; And a control unit for storing voice message data in the memory and reading data stored in the memory.

The mobile terminal for a two-way voice call and voice messenger service according to an embodiment of the present invention further includes a speaker for outputting data from the codec.

In a mobile terminal for a two-way voice call and voice messenger service according to an embodiment of the present invention, the transmitting and receiving means is connected to an antenna, extracts a baseband signal from a high frequency signal from the antenna, and converts an input signal into a high frequency signal to perform an antenna. A high frequency circuit unit for transmitting through; A modulator / demodulator for modulating the input signal of the high frequency circuit unit by the code division multiple access (CDMA) method and demodulating the signal input from the high frequency circuit unit by the code division multiple access (CDMA) method.

The mobile terminal for two-way voice call and voice messenger service according to an embodiment of the present invention further includes a display unit for displaying data from the control unit.

Other objects and advantages of the present invention in addition to the above objects will become apparent from the detailed description of the embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to FIGS. 1 to 4.

Referring to FIG. 1, a two-way voice call and voice messenger service system according to an embodiment of the present invention includes mobile terminals 1a, 1b, and 1c capable of voice recording and from mobile terminals 1a, 1b, and 1c. Long distance walky-talky server 5 for controlling two-way communication of voice message data (hereinafter referred to as " LDWT server ") 5, a mobile communication packet network 4 connected to LDWT server 5, Internet network (9), Home Location Register (HLR) (6), Voice Mail Service Center (7), and Short Message Service Center (SMSC) (8). .

The mobile terminals 1a, 1b and 1c are connected to the mobile communication packet network 4 and the switching network 3 via the base stations 2a and 2b to transmit and receive voice signals through the voice communication channel in the voice call mode. Short text information can be transmitted and received through the data communication channel through the short message mode. In addition, the mobile terminals 1a, 1b, and 1c record the voice of the subscriber while the subscriber presses a predetermined key in the voice messenger mode, and the voice terminal data of the subscriber is selected through the data communication channel. It can transmit / receive with (1a, 1b, 1c) or a plurality of mobile terminals 1a, 1b, 1c. Detailed description of these mobile terminals (1a, 1b, 1c) will be described later with reference to FIG.

The mobile communication packet network 4 includes data from the mobile terminals 1a, 1b and 1c received via the base stations 2a and 2b or the LDWT server 5, the home location register 6 and the e-mail service center. 7) The data from the short message center 8 is divided and packetized into a predetermined size, and the packet data is transmitted through a designated communication channel.

The switching network 3 performs a subscriber authentication procedure of a mobile communication subscriber, manages a communication channel necessary for data transmission and reception, and is connected to a PSTN (not shown) to relay communication between the mobile communication subscriber and the wired subscriber.

The LDWT server 5 stores and stores a buddy list including the location information of the subscriber, whether the subscriber can communicate, and the communication status of the subscriber as a database. Or provide the subscriber to the inquiry / change (update) / deletion of the buddy list. In addition, the LDWT server 5 transmits the voice message data of the calling party subscriber to the called party mobile terminals 1a, 1b, 1c during the voice messenger service, and sends the voice message service of the mobile terminal 1a, 1b, 1c in the voice messenger service. It checks whether communication is possible, communication status, etc. as session information, and transmits the result to other subscriber's mobile terminals 1a, 1b, and 1c. In addition, the LDWT server 5 transmits multimedia data such as still images, moving images, and music files from the wired terminal 10 received through the Internet network 9 to the mobile terminals 1a, 1b, and 1c. . Also, the LDWT server 5 interoperates with the home location register 6 to inquire about the location of the subscriber, whether the subscriber can communicate, and the communication status according to the response message from the home location register 6, and the e-mail service center ( 7) If the mobile terminal 1a, 1b, 1c cannot receive voice message data or multimedia data in conjunction with the 7), the subscriber can store the data in the e-mail service center 7 so that the subscriber can In the postal service mode, it is possible to receive voice message data or multimedia data transmitted by the called party subscriber. Also, the LDWT server 5 identifies that the voice message data is received by the called party mobile terminal 1a, 1b, 1c so that the called party subscriber knows that the voice message data is received when the voice messenger service is started. By transmitting the short message data assigned with the code (teleservice ID) to the short message service center 8, the called party informs the caller that the voice message of the calling party is received as text information. In addition, the LDWT server 5 stores and manages the billing details including the call start, end time, and usage, and transfers the billing details to a billing processing system (not shown) at the time of billing, thereby charging the voice messenger service. Will be processed.

The functions of the LDWT server 5 are summarized in Table 1 below.

function Detail Buddy list management -By subdividing by subscriber, register the location, communication availability, and communication status in the buddy list and store the buddy list in the database.- When the buddy list is requested from the mobile terminal, the subscriber status in the buddy list is requested to the home location register. Responding to the calling mobile terminal in response to the inquiry result-Provides inquiry / modification / deletion service for buddy list by interworking with web server or other system. Session management -Manages the status (location, communication status, etc.) of mobile terminals in the voice messenger service as session information. CDR processing -Tax breakdown (call start, end time, usage) HLR linkage -Inquires the status of subscriber by requesting home location register (HLR). VMS linkage If the mobile terminal cannot receive the voice message data, the voice message data is stored in the VMS. SMS interworking Alerting the receiving mobile terminal that voice message data is received before voice message data is received.

2 shows the mobile terminal 1a, 1b, 1c in detail.

Referring to FIG. 2, the mobile terminals 1a, 1b, 1c are a high frequency circuit section (hereinafter referred to as an "RF section") 22 connected to the antenna 21, and a codec connected to a microphone and a speaker. 24, a modulator / demodulator (MODEM) 23 connected between the RF unit 22 and the codec 24, a display unit 26, a keypad 27, and a memory 28 connected to the control unit 25. ).

The RF unit 22 extracts the baseband data from the high frequency signal received from the antenna, transmits the baseband data to the modulator / demodulator 23, converts the data from the modulator / demodulator 23 into a high frequency signal, and converts the high frequency signal into an antenna ( 21) is sent to the atmosphere.

The modulator / demodulator 23 modulates and demodulates the data input from the RF unit 22 and the codec 24 in a CDMA manner.

The codec 24 converts analog voice data input from the microphone into digital data, compresses the digital data by the EVRC method or other standard compression method, and supplies the codec 24 to the modulator / demodulator 23. In addition to decoding the digital voice data inputted from the NX, the analog voice data is converted into analog data and output to the speaker.

The controller 25 generates timing control signals such as clock signals required for the RF unit 22, the modulator / demodulator 23, and the codec 24, and stores data from the modulator / demodulator 23 and the codec 24. Data to be stored and displayed at 28 is supplied to the display unit 26. In addition, the controller 25 supplies the data from the keypad 27 to the codec 24 and the demodulator 23, and executes a corresponding command when command data is input from the keypad 27.

The display unit 26 is implemented by LCD, EL, etc. to display the current state of the mobile terminal 1a, 1b, 1c or the current state of the service when the voice messenger service is in progress.

The keypad 27 includes a plurality of number / sign keys and a plurality of function keys. In addition, the keypad 27 includes a walkie talkie key (WTK) that allows a subscriber to record his or her voice. A walkie talkie key (WTK) may be specified in addition to or in addition to existing keys. The subscriber can record his / her voice while holding down the walkie-talkie key (WTK).

The memory 28 temporarily stores the data from the modulator / demodulator 23 and the codec 24 under the control of the controller 25, stores the recorded voice data, and then controls the stored data at the request of the controller 25. Supply to (25).

In the voice messenger service, the LDWT server 5 manages the states of all mobile terminals 1a, 1b, 1c in the communicating group. On the other hand, the mobile terminal (1a, 1b, 1c) can also manage the state of the mobile terminal (1a, 1b, 1c) of the other side by downloading and storing the buddy list from the LDWT server (5).

3 shows a communication state between the LDWT server 5 and the mobile terminals 1a, 1b, 1c.

Referring to FIG. 3, when the LDWT server 5 receives a call message from the calling mobile terminal 1a, 1b, 1c, the LDWT server 5 manages the calling mobile terminals 1a, 1b, 1c in a connected state. After sending an alerting message to the called mobile terminal (1a, 1b, 1c) in response to the call message, the called mobile terminal (1a, 1b, 1c) is managed as a waiting waiting state (Waiting_Answer). do. In the answering waiting state (Waiting_Answer), the LDWT server 5 transitions to the connected state when receiving the response message for the alert message from the destination mobile terminal 1a, 1b, 1c. In the answering waiting state (Waiting_Answer), if the LDWT server 5 does not receive a response message from the destination mobile terminal 1a, 1b, 1c for a predetermined time, it transitions to disconnected state. In the connected state, the LDWT server 5 transitions to the disconnected state upon receiving the call termination message from the mobile terminals 1a, 1b, and 1c.

4 shows a signal flow between the mobile terminals 1a, 1b, 1c and the LDWT server 5 in the voice messenger service.

Referring to FIG. 4, when an originating mobile terminal 1a, 1b, 1c attempts to access a voice messenger service, the originating mobile terminal 1a, 1b, 1c performs an LDWT through a standard communication protocol, for example, TCP / IP. The buddy list is requested to the server 5 (step S1).

When the LDWT server 5 receives the buddy list request message from the calling mobile terminals 1a, 1b, and 1c, the LDWT server 5 inquires the registered subscriber information by referring to the stored buddy list and requests the home location register 6 to request the subscriber. Receives the current location, the current communication availability and the current communication status, and notifies the calling party's mobile terminal 1a, 1b, 1c of the buddy list and the subscriber's presence status (step S2).

The calling party selects a party to be called from among registered subscribers in the buddy list received or stored in its mobile terminal 1a, 1b, 1c, and attempts to connect with the selected party. Here, in the voice message service, the called party subscriber may select a plurality of parties to transmit his / her voice message. At this time, the calling party mobile terminal 1a, 1b, 1c transmits a call message to the LDWT server 5. (Step S3).

When the LDWT server 5 receives the call message from the calling mobile terminal 1a, 1b, or 1c, the LDWT server 5 sends a short message to which a specific identification code (Teleservice ID) is assigned to indicate that the voice message data is received. Send to short message service center (8). The short message service center 8 transmits the alarm message to the selected called party mobile terminals 1a, 1b, and 1c.

The receiving mobile terminal 1a, 1b, 1c receiving the alarm message outputs an alarm message through a speaker or a buzzer, or displays a message indicating that voice message data is received through the display unit 26 to the called party subscriber. Audible / visible notification of the current voice data being received. At the same time, the destination mobile terminal 1a, 1b, 1c transmits an answer message to the LDWT server 5 through a standard communication protocol, for example, TCP / IP, in response to the alert message. )

When the LDWT server receives a response message from the called mobile terminal 1a, 1b, 1c in step S5, the LDWT server forwards the answer message to the calling mobile terminal 1a, 1b, 1c. step)

The LDWT server 5 forwards the response message from the called mobile terminal 1a, 1b, 1c to the calling mobile terminal 1a, 1b, 1c in step S6, and then sends the calling mobile terminal 1a, 1b, 1c. And manages the data communication channel between the called party's mobile terminal 1a, 1b, and 1c in a connected state (Session connection) (step S7).

In the connected state, the calling party mobile terminal 1a, 1b, 1c transmits the prerecorded and stored voice message data of the calling party subscriber to the LDWT server 5 through the data communication channel (step S8). If desired, multimedia data such as a pre-stored moving picture, still picture or music file may be attached to the voice message data.

When the LDWT server 5 receives the voice message data or the multimedia data of the calling party subscriber, the LDWT server 5 transmits the data from the calling party subscriber to the called party mobile terminals 1a, 1b, 1c through the data communication channel. step)

The called party subscriber receives the voice message data of the calling party subscriber or the multimedia data attached thereto from his mobile terminal 1a, 1b, 1c and sends a voice message to the mobile terminal 1a, 1b, 1c. After recording and storing the data, the multimedia data is attached to the voice response message or the voice response message and transmitted. At this time, the called party mobile terminal 1a, 1b, 1c transmits the voice response message of the called party subscriber or the multimedia data attached thereto to the LDWT server 5 through the data communication channel (step S10).

The LDWT server 5 transmits the voice response message of the called party subscriber or the multimedia data attached thereto to the calling mobile terminal 1a, 1b, 1c in step S10.

After repeating steps S7 to S11 until the calling party and the called party want it, when the calling party selects the end of the service, the calling mobile terminal 1a, 1b, 1c sends the call termination message to the LDWT server 5. (S12 step).

When the LDWT server 5 receives the call termination message from the calling mobile terminal 1a, 1b, 1c in step S12, the LDWT server 5 delivers the call ending message to the called mobile terminal 1a, 1b, 1c and provides a voice messenger service. End (S13 step)

In step S12 and S13, the call termination may be selected by the receiving subscriber as well as the calling party first. In the case where a plurality of called subscribers have selected, i.e., a mobile terminal 1a, 1b, 1c receiving a call termination message in a communication group including a plurality of subscribers continuously receiving voice messenger service, When there is no terminal, the voice messenger service is terminated. In other words, when there are a plurality of subscribers who are being provided with voice messenger services, the mobile terminals 1a, 1b, 1c receiving the call termination message are connected to the mobile terminals 1a, 1b, 1c in the communication group. Terminate the service if) is less than one.

In order to increase the data transmission efficiency of data transmitted at one time in steps S7 to S12, the capacity of voice message data stored once in the mobile terminals 1a, 1b and 1c may be limited.

On the other hand, the originating mobile terminal (1a, 1b, 1c) by downloading the buddy list from the LDWT server (5) in advance can save the service connection time by eliminating the steps S1 and S2. In addition, the voice message data or the multimedia data attached thereto is transmitted to the destination mobile terminal 1a, 1b, 1c at the same time as the call request request in the city view of the calling mobile terminal 1a, 1b, 1c. You can also abbreviate

Although the called terminal is described in the embodiment assuming the mobile terminals 1a, 1b, 1c, the called terminal is not limited to the mobile terminal but may be a wired terminal 10 connected to the Internet network 9.

As described above, the two-way voice call and voice messenger service system and method using the mobile communication data network according to the present invention is to record the voice of the subscriber using a mobile terminal and then compressed with a codec and the compressed voice message data or The attached multimedia data is transmitted to the other party's mobile terminal or wired terminal through the data communication channel. Accordingly, the two-way voice call and voice messenger service system and method using the mobile communication data network according to the present invention can reduce the service cost of the subscriber by sending and receiving voice messages at a low cost, as well as moving pictures, still pictures, music files It is possible to transmit and receive multimedia data at low cost. Furthermore, a bidirectional voice call and voice messenger service system using a mobile communication data network according to the present invention and a method thereof are provided by digitally compressing voice message data or multimedia data attached thereto using a codec and then transmitting and receiving data through a data communication channel. By minimizing packet loss and facilitating error correction, the quality of data is improved. The mobile terminal according to the present invention sets a key for allowing the subscriber to record the subscriber's voice and sets the recording period of the subscriber in one of the keys included in the existing keypad or adds it as a separate key and stores voice message data. It is possible to record voice by installing memory and codec for compressing voice message data and transmitting compressed voice message data or attached multimedia data through data communication channel. do.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (27)

A calling party's mobile terminal for recording the subscriber's voice and constructing voice message data including the voice to transmit the voice message data; At least one destination terminal for receiving the voice message data; And a server for controlling bidirectional communication between the calling mobile terminal and the called terminal. The method of claim 1, The called terminal is any one of a mobile terminal connected to a mobile communication network and a wired terminal connected to a wired communication network, wherein the two-way voice call and voice messenger service system using a mobile communication data network. The method of claim 1, And the called terminal is set in plural by selection of the calling mobile terminal. The method of claim 1, The voice message data is a two-way voice call and voice messenger service system using a mobile communication data network, characterized in that attached to the multimedia data including at least one of video data, still image data and music file data. The method of claim 1, And a mobile communication packet network and a switching network for relaying data transmission and reception between the calling mobile terminal and the server. The method of claim 1, The server stores a buddy list including location information of a registered subscriber, communication availability information of the registered subscriber, and a communication status of the registered subscriber; And a buddy list to the calling mobile terminal in response to a request of the calling mobile terminal. The method of claim 1, The server transmits a short message for notifying the reception of the voice message data to the called terminal before transmitting the voice message data to the called terminal. Service system. The method of claim 7, wherein The short message is a two-way voice call and voice messenger service system using a mobile communication data network, characterized in that the identification code for identifying the voice message data is assigned. The method of claim 7, wherein And a short message service center for receiving the short message and transmitting the short message to the called terminal under the control of the server. The method of claim 1, A home location register for notifying the server of the current location of the called terminal in response to a request of the server; And a voice mail service center for storing data to be transmitted to the called terminal under the control of the server and transmitting the stored data to the called terminal in response to a request of the called terminal. Two-way voice call and voice messenger service system. The method of claim 1, The voice message data is a two-way voice call and voice messenger service system using a mobile communication data network, characterized in that the transmission and reception via a data communication channel. The method of claim 1, And the voice message data is compressed by the calling mobile terminal before being transmitted. 2. Recording the voice of the subscriber to the calling mobile terminal and transmitting voice message data including the voice; Receiving the voice message data at at least one called terminal; And transmitting the voice message data through a data communication channel when the voice message data is transmitted and received, and controlling call initiation, data transmission, and call termination between the calling mobile terminal and the called mobile terminal. A two-way voice call and voice messenger service method using a mobile communication data network. The method of claim 13, Controlling data transmission and call termination when initiating a call between the calling mobile terminal and the called mobile terminal, A first step of the calling party requesting a buddy list including location information of the called party subscriber, communication availability information of the called party subscriber, and a communication status of the called party subscriber; In response to a request from the calling mobile terminal, transmitting a current status of the buddy list and the called subscriber to the calling mobile terminal; A third step of the calling mobile terminal requesting a call view; A fourth step of transmitting, to the called terminal, an alarm short message to which the identification code for identifying the voice message data is assigned to the called terminal in response to the call message; A fifth step of generating, by the called terminal, a message responsive to the alarm short message; A sixth step of establishing a data communication channel between the calling mobile terminal and the called terminal when the calling mobile terminal receives the response message; Transmitting the voice message data received from the calling mobile terminal to the called terminal and delivering the voice message data received from the called terminal to the calling mobile terminal; And an eighth step of switching a data communication channel between the calling mobile terminal and the called terminal in response to a call termination message generated from at least one of the calling mobile terminal and the called terminal. Two-way voice call and voice messenger service method using a mobile communication data network. The method of claim 13, And attaching multimedia data including at least one of video data, still image data, and music file data to the voice message data. 2. . The method of claim 13, The data capacity of the voice message data transmitted once through the data communication channel is limited to a specific data capacity. The method of claim 13, The first and second steps are omitted two-way voice call and voice messenger service method using a mobile communication data network. The method of claim 13, The voice message data is a two-way voice call and voice messenger service method using a mobile communication data network, characterized in that transmitted to the called terminal at the same time as the call of the mobile terminal. The method of claim 13, The called terminal is any one of a mobile terminal connected to a mobile communication network and a wired terminal connected to a wired communication network. The method of claim 13, And the called terminal is set in plural by the selection of the calling mobile terminal. The method of claim 13, And transmitting a short message to the called terminal for notifying the reception of the voice message data before transmitting the voice message data to the called terminal. Voice messenger service method. The method of claim 13, And the voice message data is compressed by the calling mobile terminal before being transmitted. A key set for the subscriber's voice recording; Voice recording means for recording the subscriber's voice while the key is on; Mobile terminal for a two-way voice call and voice messenger service using a mobile communication data network, characterized in that it comprises a transmitting and receiving means for transmitting and receiving the recorded voice message data. The method of claim 23, The voice recording means includes a microphone for converting the subscriber's voice into an electrical signal while the key is kept on; A codec for converting the voice signal of the subscriber into digital data, compressing the voice signal to generate the voice message data, and converting data from the transmission / reception means into an analog form; A memory for storing the voice message data; And a control unit for storing the voice message data in the memory and reading the data stored in the memory. 2. A mobile terminal for a two-way voice call and voice messenger service using a mobile communication data network. The method of claim 24, A mobile terminal for a two-way voice call and voice messenger service using a mobile communication data network, further comprising a speaker for outputting data from the codec. The method of claim 23, The transmitting and receiving means includes: a high frequency circuit unit connected to an antenna for extracting a baseband signal from the high frequency signal from the antenna and converting an input signal into the high frequency signal and transmitting the signal through the antenna; And a modulator / demodulator for modulating an input signal of the high frequency circuit unit using a code division multiple access (CDMA) method and demodulating a signal input from the high frequency circuit unit using the code division multiple access (CDMA) method. Mobile terminal for two-way voice call and voice messenger service using mobile data network. The method of claim 24, A mobile terminal for a two-way voice call and voice messenger service using a mobile communication data network, further comprising a display unit for displaying data from the control unit.