KR20060029876A - System and method for offering short message service - Google Patents

Abstract

The present invention provides a method of providing a short message service of a short message service system, which is connected to a plurality of mobile communication terminals including first and second mobile communication terminals in a wireless network to provide a short message service to the mobile communication terminals. Storing the received message when a message including response request information for requesting a response of the second mobile communication terminal is received from a first mobile communication terminal, and transmitting the received message to the second mobile communication terminal; And notifying the first mobile communication terminal of the reception of the notification message when a notification message indicating confirmation of the message including the response request information is received from the second mobile communication terminal. . Accordingly, the present invention can check whether a mobile terminal user receives a short message transmitted to another mobile communication terminal, and the user of the mobile communication terminal responds to a message to be transmitted without inputting a short message to another mobile communication terminal. You can request

Short message, service, response request

Description

SYSTEM AND METHOD FOR PROVIDEING SHORT-MESSAGE SERVICES {SYSTEM AND METHOD FOR OFFERING SHORT MESSAGE SERVICE}             

1 is a block diagram of a system for providing a short message service according to an exemplary embodiment of the present invention.

2 is a block diagram of a short message service server according to an exemplary embodiment of the present invention.

3 is a block diagram of a mobile communication terminal according to an embodiment of the present invention.

4 is a flowchart illustrating a short message service providing process of a short message service providing system according to an exemplary embodiment of the present invention.

5 (a) and 5 (b) are exemplary diagrams for explaining a process of transmitting a message including response request information to a short message service server by a mobile communication terminal according to an exemplary embodiment of the present invention.

6 (a) and 6 (b) are exemplary diagrams for describing a short message service providing process of a short message service providing system according to an exemplary embodiment of the present invention.

The present invention relates to a short message service system, and in particular, a mobile communication terminal user can check whether a short message transmitted to another mobile communication terminal is received, and can request a response from another mobile communication terminal user who has received the message. System and method.

In general, a mobile communication terminal is a cellular phone, a personal digital assistant (PDA), a personal communication services phone (PCS), an IMT-2000 terminal (International Mobile Telecommunication-2000), GSM (Global System For Mobile Communication) It refers to a device that provides a communication function such as a terminal, such as a terminal, to make a call or exchange data while moving.

The mobile communication terminal as described above is a device commonly used anywhere in the world regardless of gender and age, and is recognized as a necessity to carry around at all times. Therefore, the mobile communication terminal has become a miniaturized, slim, and light weight in consideration of portability, and is moving toward multimedia for pursuing more various functions.

Typically, a mobile terminal user can subscribe to a communication service company to perform voice and data communication through the mobile terminal. A user carries a mobile communication terminal and wirelessly transmits and receives information with another subscriber through a base station of a communication service provider subscribed through the mobile communication terminal.                         

As a result, more information is available more conveniently because of the time- and location-constrained advantage of conventional landline phones. Accordingly, the communication service provider may send and receive text messages between subscribers, as well as a short messaging service (SMS) that may receive, for example, news, sports relay, etc. information from the communication service provider. To the user.

The short message service generally transmits a message to a user using a paging channel on a mobile communication network, apart from a call channel, so the amount of data that can be transmitted is limited, but the message can be transmitted even when the user is not connected to the mobile communication system. It can be delivered and has the advantage of delivering information directly to multiple users in a short time.

Therefore, in recent years, the number of users who send and receive short messages using a mobile communication terminal is increasing rapidly, and the short message transmission has gained considerable popularity especially among students because the usage fee is much lower than the voice call fee.

However, in the conventional short message service method as described above, after transmitting a short message written by the user to a specific counterpart, the user cannot confirm whether the other party has received the short message transmitted by the other party. In addition, when a user writes a short message to be transmitted, there is no way to send a short message requesting a reply to the other party unless a user inputs a content requesting a response.

Accordingly, an object of the present invention is to provide a system and method capable of confirming whether a mobile communication terminal user receives a short message transmitted to another mobile communication terminal.

Another object of the present invention is to provide a short message service system and method that enables a mobile communication terminal user to request a response of a short message transmitted to another mobile communication terminal.

It is still another object of the present invention to provide a system and method for promoting user convenience by providing a variety of short message services.

In order to achieve the above object, the present invention provides a short message service system for providing a short message service to the mobile communication terminals by connecting to a plurality of mobile communication terminals including a first and second mobile communication terminals in a wireless network. A method of providing a message service, the method comprising: storing a received message when a message including response request information for requesting a response of a second mobile communication terminal is received from a first mobile communication terminal; Transmitting to the mobile communication terminal; and notifying the first mobile communication terminal of the reception of the notification message when receiving a notification message informing of confirmation of the message including the response request information from the second mobile communication terminal. Characterized in that it comprises a.                     

Preferably, the method of providing a short message service of the short message service system may further include a step of deleting the stored message after notifying the first mobile communication terminal of the reception of the notification message.

The present invention also provides a short message server connected to a plurality of mobile communication terminals including first and second mobile communication terminals in a wireless network to provide a short message service to the mobile communication terminals. A notification for receiving a message including response request information requesting a response of a second mobile communication terminal, transmitting the received message to a second mobile communication terminal, and notifying confirmation of the transmitted message from the second mobile communication terminal; A wireless unit for receiving a message, a storage unit for storing a message including response request information received from the wireless unit, and notifying the first mobile communication terminal when the notification message is received from the second mobile communication terminal; And a server controller for controlling the overall operation of the short message server. Shall be.

The present invention relates to a short message service server providing a short message service and a mobile communication terminal connected through a wireless network, wherein the short message service includes a message including response request information for requesting a response of a message to be transmitted to another mobile communication terminal. A wireless transmission / reception unit which transmits to the server and receives a notification message notifying the acknowledgment of the message including the response request information from other mobile communication terminals, from the short message service server; And a controller configured to display a message including the received response request information, and a controller to control operations of the radio transmitter and receiver.

Preferably, the mobile communication terminal further comprises a storage unit for storing a message including the response request information transmitted to the other mobile communication terminal through the wireless control unit under the control of the controller.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the same elements in the figures are represented by the same numerals wherever possible. In addition, detailed descriptions of well-known functions and configurations that may unnecessarily obscure the subject matter of the present invention will be omitted.

1 is a block diagram of a system for providing a short message service according to an exemplary embodiment of the present invention.

The illustrated short message service providing system includes a short message service server 100, a first mobile communication terminal 200, and a second mobile communication terminal 300.

The short message service server 100 provides a short message service to the first mobile communication terminal 200 and the second mobile communication terminal 300 connected to a wireless network (not shown).

The short message service server 100 stores a message including response request information for requesting a response of the second mobile communication terminal 300 from the first mobile communication terminal 200 and stores the received message, and stores the received message. 2 is transmitted to the mobile communication terminal 300.

If the short message service server 100 receives a notification message indicating the confirmation of the transmitted message (eg, when the user of the second mobile communication terminal 300 reads the transmitted message) from the second mobile communication terminal, The first mobile communication terminal 200 is notified of this.

The short message service server 100 will be described in detail later with reference to FIG. 2.

2 is a block diagram of a system for providing a short message service according to an exemplary embodiment of the present invention.

The illustrated route providing server 100 includes a wireless unit 110, a server controller 120, and a storage unit 130.

1 and 2, the wireless unit 110 receives a message including response request information for requesting a response of the second mobile communication terminal 300 from the first mobile communication terminal 200. In addition, the wireless unit 110 receives a notification message indicating the confirmation of the transmitted message (for example, when the user of the second mobile communication terminal 300 reads the message) from the second mobile communication terminal 300.

The server controller 120 controls the overall operation of the short message service server 100 according to an embodiment of the present invention. In addition, when a message including the response request information is received from the first mobile communication terminal 200, the server controller 120 controls the wireless unit 110 to transfer the received message to the second mobile communication terminal 300. send.

When the server controller 120 receives a notification message indicating confirmation of the transmitted message (eg, when the user of the second mobile communication terminal 300 reads the message) from the second mobile communication terminal 300, the wireless unit ( The control unit 110 controls the notification to the first mobile communication terminal 200. At this time, the server control unit 120 preferably notifies the first mobile communication terminal 200 of the reception of the notification message by a short message.

The storage unit 130 stores various information necessary for controlling the operation of the path providing server 100. The storage unit 130 also stores a message including response request information for requesting a response from another mobile communication terminal among the messages received by the wireless unit 110 under the control of the server controller 120. In this case, the server controller 120 may determine whether the response request information is included in the message received from the first mobile communication terminal 200 in the following manner.

When a predetermined message is received, the server controller 120 checks whether a predetermined code value exists in a predetermined field (for example, an unused field) among the fields constituting a header of the received message, and sets the preset result as a result of the check. If there is a code value, the received message may be determined to be a message including response request information.

Alternatively, in the case of the Global System For Mobile Communication (GSM) type short message service, when the mobile communication terminal transmits the message to the short message service server 100 by setting the protocol ID value of the message to 10, the server controller ( 120 may check the protocol ID value of the received message and determine that the received message is a message including response request information when the value is 10.

Meanwhile, the storage unit 130 stores the message including the response request information for requesting the response of the other mobile communication terminal among the messages received by the wireless unit 110 under the control of the server controller 120. When the unit 110 receives the notification message from the second mobile communication terminal 300, the message corresponding to the notification message is checked among the messages including the response request information transmitted to the second mobile communication terminal 300. This is for notifying the reception of the notification message to the first mobile communication terminal 200.

Meanwhile, the server controller 120 notifies the first mobile communication terminal (ie, the calling mobile terminal) 200 of the reception of the notification message, and then includes a message including a response request stored in the storage 130. Among them, it is preferable to delete the message corresponding to the notification message.

3 is a block diagram of a mobile communication terminal according to an embodiment of the present invention.

The illustrated mobile communication terminal 200 includes a control unit 210, a modem 220, a wireless transmitter / receiver 223, an audio processor 225, a key input unit 227, a memory 230, a camera unit 240, And an image processor 250 and a display unit 260.

The wireless transmitter / receiver 223 is responsible for transmitting and receiving voice data, text data, video data, and control data under the control of the controller 210.

The wireless transmitter / receiver 223 includes an RF transmitter for upconverting and amplifying a frequency of a transmitted signal, an RF receiver for low noise amplifying and downconverting a received signal, and a high frequency processor, an intermediate frequency processor, and a baseband. Means a comprehensive configuration of the processing unit.

In addition, the wireless transmitter / receiver 223 transmits a message including response request information for requesting a response of a message to be transmitted to another mobile communication terminal to the short message service server 100 under the control of the control unit 210, and performs a short message service. The server 100 receives a message including response request information sent by other mobile communication terminals. At this time, the method for including the response request information in the message to be transmitted is as follows.

In the first method, when the control unit 210 transmits a message including the response request information according to a user's request, the control unit 210 selects a predetermined field (eg, an unused field) among the fields constituting a header of the message to be transmitted. This is a method of recording and transmitting a preset code value. In this case, when the predetermined message is received, the short message service server 100 examines the header of the received message, and if a predetermined code value is recorded in a predetermined field constituting the header, the short message service server 100 includes response request information. Judging by the message.

In the second method, when the control unit 210 transmits a message including the response request information according to a user's request, the control unit 210 sets the protocol ID value of the message to 10 and transmits it to the short message service server 100. Way. In this case, the short message service server 100 examines the protocol ID value of the received message, and if the value is 10, determines that the received message is a message including response request information.

Meanwhile, although not shown, the mobile communication terminal according to the embodiment of the present invention may further include a data receiver for receiving digital broadcast data.

The modem 220 includes a transmitter for encoding and modulating the transmitted signal, a receiver for demodulating and decoding the received signal, and the like.

The audio processor 225 may configure a codec, and the codec includes a data codec for processing packet data and an audio codec for processing an audio signal such as voice.

The audio processor 225 converts and reproduces the digital audio signal received from the modem 220 through the audio codec and converts the analog audio signal generated from the microphone into the digital audio signal through the audio codec. The modem 220 transmits the function. The codec may be provided separately or included in the controller 210.

The key input unit 227 has a key matrix structure (not shown) and includes a character key, numeric keys, various function keys, and an external volume key to output a key input signal corresponding to a key input by a user to the controller 210. do.

The memory 230 may include a program memory and a data memory, and stores various information necessary for controlling the operation of the mobile communication terminal. In addition, the memory 230 stores various types of information selected based on user selection information.

The memory 230 stores a message including response request information transmitted to the other mobile communication terminal through the wireless transmitter / receiver 223 under the control of the controller 210.

The controller 210 controls the overall operation of the mobile communication terminal according to an embodiment of the present invention, and may include a modem 220 and a codec.

The control unit 210 displays a message including the response request information transmitted by other mobile communication terminals through the display unit 260 when the message is received by the wireless transmitting / receiving unit 223 through the short message service server 100. The controller 223 controls the short message service server 100 to notify the short message service server 100 of the confirmation of the message including the response request information (for example, when the mobile terminal user reads the message). In this case, the method of determining whether the control unit 210 includes the response request information of the message received by the wireless transmission / reception unit 223 through the short message service server 100 is the same as described above, and thus will be omitted.

When the controller 210 receives a notification from the short message service server 100 through the wireless transmitter / receiver 223 that a notification message transmitted from another mobile communication terminal has been received, the controller 210 displays a mark indicating the message together with the message stored in the memory 230. Control to display as 6 (b). The marker is preferably displayed on the screen when the user reads the message.

The camera module 240 captures image data, and includes a camera sensor for converting the photographed optical signal into an electrical signal, and a signal processor for converting the analog image signal photographed from the camera sensor into digital data. . Herein, it is assumed that the camera sensor is a CCD sensor, and the signal processor may be implemented by a digital signal processor (DSP). In addition, the camera sensor and the signal processor may be integrally implemented or may be separately implemented.

The image processor 250 performs a function of generating screen data for displaying an image signal output from the camera unit 240.

The image processor 250 processes the image signal output from the camera unit 440 in units of frames, and outputs the frame image data according to the characteristics and the size of the display unit 260. In addition, the image processing unit 250 includes an image codec and performs a function of compressing the frame image data displayed on the display unit 260 in a set manner or restoring the compressed frame image data to the original frame image data.

In addition, it is assumed that the image processor 250 has an On Screen Display (OSD) function, and may output on-screen display data according to the screen size displayed by the control of the controller 210.

The display unit 260 displays an image signal output from the image processor 250 on a screen, and displays user data output from the controller 210. In addition, the display unit 260 displays a message including the response request information received by the wireless transmitter / receiver 223 under the control of the controller 210.

In this case, the display unit 260 may use an LCD. In this case, the display unit 260 may include an LCD controller, a memory capable of storing image data, an LCD display device, and the like. Meanwhile, when the LCD is implemented using a touch screen, the display unit 260 may operate as an input unit.

4 is a flowchart illustrating a short message service providing process of a short message service providing system according to an exemplary embodiment of the present invention.

1 to 4, the first mobile communication terminal 200 transmits a message including response request information for requesting a response of the second mobile communication terminal 300 in response to a user request. (S405). In this case, the method of including the response request information in the message to be transmitted is omitted since it has been described with reference to FIG. 2.

The first mobile communication terminal 200 transmits the message including the response request information, and then stores the message (S410).

The short message service server 100 checks whether a response message is included in the message when a predetermined message is transmitted from the first mobile communication terminal 200 (S415). At this time, the short message service server 100 may check whether a predetermined code value is recorded in a predetermined field constituting the header of the received message, and determine the message as a message including response request information. If the protocol ID value of is set to a preset value (eg, 10), the message may be determined to be a message including response request information.

If the short message service server 100 does not include the response request information in the received message, the message is transmitted to the second mobile communication terminal 300 as it is (S420), and the response message includes the response request information. If so, the message is stored (S425) and then transmitted to the second mobile communication terminal (300) (S430). At this time, the short message service server 100 stores a message including the response request information received from the first mobile communication terminal 200, which informs the confirmation of the transmitted message from the second mobile communication terminal 300. When the notification message is received, the message corresponding to the notification message is checked to notify the reception of the notification message to the first mobile communication terminal 200. In this case, the acknowledgment of the message generally refers to a case in which the mobile communication terminal user reads the received message.                     

When a predetermined message is received from the short message service server 100, the second mobile communication terminal 300 checks whether the received message includes response request information (S425).

If the response request information is not included in the message received as a result of the inspection, the second mobile communication terminal 300 determines the received message as a general short message and displays it (S440).

If the message received as a result of the check includes the response request information, the second mobile terminal 300 determines that the received message is a message including the response request information, and notifies that the message including the response request information is received. The marker is displayed together with the received message (S445). The marker is preferably displayed on the screen when the user reads the message as shown in FIG. At this time, the second mobile communication terminal 300, after displaying the marker, in response to the response request included in the received message, it is preferable to switch to the message transmission mode or to the transmission mode for performing the call.

The second mobile communication terminal 300 checks whether there is a user confirmation of the message displayed in step S445 (S450).

If there is a user confirmation of the displayed message, the second mobile communication terminal 300 transmits a notification message informing the user confirmation of the message including the response request information to the short message service server 100 (S455).

When the short message service server 100 receives the notification message from the second mobile communication terminal 300, the short message service server 100 checks a message including the response request information of the previously stored first mobile communication terminal 200 and receives the notification message. The first mobile communication terminal 200 is notified (S460).

The short message service server 100 notifies the first mobile communication terminal 200 of the reception of the notification message, and then deletes the corresponding message corresponding to the notification message from among previously stored messages (S465).

When the first mobile communication terminal 200 is notified that the notification message of the second mobile communication terminal 300 has been received from the short message service server 100, the message corresponding to the notification message among the messages stored in step S410 is received. Check whether is stored (S470).

When the first mobile communication terminal 200 stores a message corresponding to the notification message among previously stored messages, the first mobile communication terminal 200 transmits the message to the second mobile communication terminal 300 by a user request. A message indicating that the user of the second mobile communication terminal 300 confirms the message including the response request information is displayed together with the stored message as shown in FIG. 6 (b) (S475).

According to the embodiment of the present invention, the user can check whether the short message transmitted to the other mobile communication terminal is received, and the user can respond to the message to be transmitted without inputting a short message to the other mobile communication terminal. You can request In addition, the user can use more various short message services, thereby increasing convenience.                     

5 (a) and 5 (b) are exemplary views for explaining a process of transmitting a message including response request information to a short message service server by a mobile communication terminal according to an exemplary embodiment of the present invention.

5 (a) and 5 (b), FIG. 5 (a) shows message contents to be transmitted to another mobile terminal in the message input mode of the mobile terminal in order to transmit a message including response request information. Displays the input screen.

When the user of the mobile communication terminal inputs a confirmation key after inputting the message contents to be transmitted on the screen of FIG. FIG. 5B shows a screen for selecting whether to transmit a message including response request information along with a message.

When the user of the mobile communication terminal enters a confirmation key on the screen of FIG. 5 (b), the message input in FIG. .

6 (a) and 6 (b) are exemplary views for explaining a short message service providing process of a short message service providing system according to an exemplary embodiment of the present invention.

6 (a) and 6 (b) with reference to FIG. 4, FIG. 6 (a) shows that the second mobile communication terminal 300 passes through the first mobile communication terminal 200 through step S445 of FIG. 4. Shows an example of a screen displaying a message containing response request information transmitted by).

In the illustrated screen, an example of a message indicating that a message including response request information has been received is a message content written by a user of the first mobile communication terminal 200 (ie, Hong Gil-dong) together with the message "It is a message for requesting an answer." Let's meet at Gwanghwamun at 5 pm on the 14th "is displayed. At this time, the second mobile communication terminal 300 preferably displays the received message and transmits a notification message to the short message service server 100 indicating that the second mobile communication terminal user has confirmed the message. . In addition, the second mobile communication terminal 300 may transmit the notification message to the short message service server 100 when a user who reads the displayed message inputs a confirmation key.

FIG. 6B illustrates a message including response request information transmitted by the first mobile communication terminal 200 to the second mobile communication terminal 300 through S475 of FIG. 4. 2 shows an example of a screen displaying a mark indicating that the user of the second mobile communication terminal 300 has confirmed with the transmitted message.

In the illustrated screen, as an example of a mark indicating that the message including the response request information has been confirmed by the user of the second mobile communication terminal 300 (ie, Jang Gil-san), the message is " the message confirmed by the other party " 200) The message contents transmitted by the user to the second mobile communication terminal 300 are displayed. Accordingly, a message transmitted to the second mobile communication terminal 300 by the user of the first mobile communication terminal 200 is normally received by the second mobile communication terminal 300, and the user of the second mobile communication terminal 300 receives the message. You can see that you confirmed.

In the above description of the present invention, specific embodiments have been described, but various modifications may be made without departing from the scope of the present invention. Therefore, the scope of the present invention should not be defined by the described embodiments, but should be determined not only by the claims but also by the equivalents of the claims.

As described above, the present invention can check whether the mobile communication terminal user receives the short message transmitted to the other mobile communication terminal.

In addition, the present invention can request the response of the message to be transmitted without inputting additional content to the short message to be transmitted to the other mobile communication terminal user.

In addition, the present invention can provide a variety of short message services to facilitate user convenience.

Claims (18)

A method of providing a short message service of a short message service system, which is connected to a plurality of mobile communication terminals including a first and second mobile communication terminals by a wireless network and provides a short message service to the mobile communication terminals, Storing a received message when a message including response request information for requesting a response of the second mobile communication terminal is received from the first mobile communication terminal; Transmitting the received message to the second mobile communication terminal; And receiving a notification message notifying the confirmation of the message including the response request information from the second mobile communication terminal, notifying the first mobile communication terminal of the reception of the notification message. Method of providing short message service in service providing system. The method of claim 1, And notifying the first mobile communication terminal of the reception of the notification message, and then deleting the stored message. The method of claim 1, wherein the storing process Checking whether the response request information is included in the message received from the first mobile communication terminal; And if the response request information is included in the received message, storing the received message. The method of claim 3, wherein said inspecting step And when a message is received from the first mobile terminal, checking whether a predetermined code value exists in a predetermined field among fields constituting a header of the received message. The method of claim 3, wherein said inspecting step And receiving a message from the first mobile communication terminal, checking whether a protocol ID value of the received message is a preset value. A short message server connected to a plurality of mobile communication terminals including first and second mobile communication terminals by a wireless network to provide a short message service to the mobile communication terminals. Receive a message including response request information for requesting a response of the second mobile communication terminal from the first mobile communication terminal and transmits the received message to the second mobile communication terminal, and transmitted from the second mobile communication terminal A wireless unit for receiving a notification message informing of confirmation of the message, A storage unit which stores a message including response request information received by the wireless unit; And a server controller for notifying the first mobile communication terminal when the notification message is received from the second mobile communication terminal and controlling the overall operation of the short message server. The method of claim 6, wherein the server control unit And when the notification message is received from the second mobile communication terminal, controls the wireless unit to notify the first mobile communication terminal of the reception of the notification message, and then controls to delete the message stored in the storage unit. Short message service server. The method of claim 6, wherein the server control unit When a message is received from the first mobile communication terminal, it is checked whether a predetermined code value exists in a predetermined field among fields constituting a header of the received message. The short message service server, characterized in that it is determined that the message containing the response request information. The method of claim 6, wherein the server control unit When a message is received from the first mobile communication terminal, the protocol ID value of the received message is inspected. If the protocol ID value is a preset value, the received message is determined to be a message including response request information. Short message service server, characterized in that. A mobile communication terminal connected to a short message service server providing a short message service through a wireless network, A message including response request information for requesting a response of a message to be transmitted to another mobile communication terminal is transmitted to the short message service server, and the short message service server receives the message including the response request information from other mobile communication terminals. A wireless transmission and reception unit which receives a notification message informing of confirmation, from the short message service server; A display unit which displays a message including the received response request information; And a control unit for controlling operations of the radio transceiver and the display unit. The method of claim 10, And a memory for storing a message including response request information transmitted to another mobile communication terminal through the wireless unit under control of the controller. The method of claim 10 or 11, wherein the control unit And when the radio transmission and reception unit is notified that the notification message transmitted by the other mobile communication terminal has been received from the short message service server, controls to display an indication indicating the message together with the message stored in the memory. The method of claim 10, wherein the control unit When a message transmitted from another mobile communication terminal is received from the short message service server, it is checked whether a predetermined code value exists in a predetermined field among fields constituting a header of the received message. And determining the received message as a message including response request information. The method of claim 10, wherein the control unit When a message transmitted from another mobile communication terminal is received from the short message service server, the protocol ID value of the received message is inspected. If the protocol ID value is a preset value, the message includes response request information. Mobile terminal, characterized in that determined by. The method of claim 13 or 14, wherein the control unit And if the message received from the short message service server is a message including response request information, controlling to display an indication indicating this together with the message through a display unit. The method of claim 15, wherein the control unit And displaying a mark indicating when a message including response request information transmitted from another mobile communication terminal is received, and switching the mobile communication terminal to a message transmission mode. The method of claim 15, wherein the control unit And displaying a mark indicating when a message including response request information transmitted by another mobile communication terminal is received, and switching the mobile communication terminal to an outgoing mode for performing a call. The method of claim 15, wherein the control unit And transmitting a notification message notifying the user of the message including the response request information displayed on the display unit to the short message service server through the wireless transmitter / receiver.

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