KR20030090033A - System and method for informing to be close together with registration using position information of the mobile communication terminal - Google Patents

Abstract

PURPOSE: A notification object approach notification service system and method using the location information of a mobile terminal is provided to notify a mobile terminal user that a desired object exists at an adjacent distance. CONSTITUTION: A user's mobile terminal(11), a notification object's mobile terminal(12), a base station(20), a communication satellite(30), a location information acquisition server(40), and a notification object approach notification server(50) are mutually and organically connected through wired/wireless networks. The mobile terminals(11,12) transmits their respective location information signals to the base station(20) or the communication satellite(30) periodically. The base station(20) receives mobile signals, containing the location information signals transmitted from the mobile terminals(11,12), transmits the identification information of the mobile terminals(11,12) to the location information acquisition server(40) together with its own identification information. The communication satellite(30), receiving the location information signals transmitted from the mobile terminals(11,12), transmits the location information of the mobile terminals(11,12) to the location information acquisition server(40). The location information acquisition server(40) caches the locations of the mobile terminals(11,12) through the data received from the base station(20) or the communication satellite(30) and transmits the caught location information to the notification object approach notification server(50) with the identifier information of the mobile terminals(11,12). The notification object approach notification server(50), based on the location information of the mobile terminals(11,12), transmits an approach notification signal to the user's mobile terminal(11) if it is judged that the distance between the two mobile terminals(11,12) is within an appointed distance.

Description

System and method for informing to be close together with registration using position information of the mobile communication terminal}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mobile communication service system using a mobile communication network and a service method thereof. In particular, a mobile communication service system and a service for notifying a mobile communication terminal user of the proximity of a desired target by using location information of the mobile communication terminal. It is about a method.

People sometimes recognize that they are staying in close proximity to other people during conversations with others about their experiences. At this time, if you know that the other party was in the proximal position, there is a time that you could miss each other.

In addition, when people wait for the other party at an appointment place, they may feel frustrated because they do not know whether the other party has arrived nearby or is still far from the appointment place. In this case, although the location may be confirmed by talking to the other party using a communication means such as a mobile communication terminal, it may be cumbersome to make a phone call and wait for confirmation without confirmation. At this point, if you can see if the appointment partner has reached the location of the appointment, waiting for the partner will be much less tedious.

Also, if you do not clarify the place of appointment and set the place where the public gathers a lot, if the place of meeting is very crowded, you can find out if the other person is near and looking for you or has not arrived yet. There are times when you may feel insecure that they will cross each other. In particular, if the appointment partner does not know each other's faces, it is often inconvenient to find the other person, and often uncomfortable to stay in one place.

SUMMARY OF THE INVENTION An object of the present invention is to provide a service system and a service method for notifying a mobile communication terminal user of a proximity distance of a desired target by using a mobile communication terminal owned by many people to solve the above problems. have.

Another object of the present invention is to provide a mobile communication terminal and a method of displaying the same, which display the presence of a close range of a notification subject.

1 is a network diagram of a notification subject proximity notification service system according to the present invention;

2 is a block diagram of a notification subject proximity notification server of FIG. 1;

3 is a configuration diagram of the database shown in FIG.

4 is a block diagram of a mobile communication terminal according to the present invention, and

5 to 9 are diagrams illustrating the types of contents displayed on the screen of the mobile communication terminal when the mobile communication terminal user accesses the notification target proximity notification server according to the present invention and uses the service.

* Description of the symbols for the main parts of the drawings *

11, 12: mobile communication terminal 20: base station

30: communication satellite 40: location information acquisition server

50: notification server close notification server 52: Web server

54: database server 56: proximity notification server

58: database 110: input unit

120: transmitter / receiver 130: display

140: control unit

The service system of the present invention for achieving the above object comprises: a database in which a mobile communication terminal identifier of a user and a mobile communication terminal identifier of a notification subject registered by the user are registered, matched with a mobile communication terminal user; Acquires the location information of the mobile communication terminal of the user and the location information of the mobile communication terminal of the notification subject registered by the user, and processes the location information of each of the mobile communication terminals to be stored by matching each identifier of the database; Database server; And calculating a distance between the two mobile communication terminals based on the location information of the mobile communication terminal of the user and the location information of the mobile communication terminal of the notification subject, wherein the distance between the two mobile communication terminals is within a predetermined distance. And a notification subject proximity notification server for notifying the mobile communication terminal of the user that the notification subject is in close proximity to the user.

In addition, the mobile communication service system of the present invention, a web server for providing wireless Internet content and / or wired Internet content to enable the user to register the proximity presence notification service subjects through a mobile communication terminal and / or an Internet terminal; It further includes.

The wired and / or wireless content provided by the web server may be a content that enables the user of the mobile communication terminal to check whether or not the registration of the proximity notification service of others with respect to the mobile communication terminal and the user of the mobile communication terminal. Includes content that can be set so that the proximity presence notification service is not notified of registration of the proximity presence notification service of others to the terminal. Through this, the user of the mobile communication terminal can prevent an unwanted party from being notified of his / her existence.

In addition, the wired and / or wireless content provided by the web server, the user provides the content that allows the user to set the notification distance of the subject, the notification subject proximity notification server, the notification subject from the subscriber The notification may be performed when the content exists within a distance set by the content.

On the other hand, the location information of the mobile communication terminals can be calculated in various ways, preferably, the location information of the base station and / or information obtained through the communication satellite is used. In this case, when providing a proximity notification service using the location information obtained through the base station, the database server obtains the location information of a plurality of base stations in close proximity to each mobile communication terminal, the proximity notification server of the two mobile communication terminals, When the base stations in the proximate location overlap each other, it is determined that the user and the subject of the notification are present in the proximal distance.

In addition, when performing the service using the location information of the mobile communication terminal obtained through the mobile communication satellite, the database server obtains the current coordinates of each mobile communication terminal obtained from the communication satellite, the proximity notification server Calculates the distance between the two mobile communication terminals through each coordinate, and when the calculated distance is within a predetermined distance, it is determined that the user and the subject to be in close proximity.

In addition, the notification subject proximity notification server, the multi-step notification distance from the location of the user mobile communication terminal is set in advance, and can be notified whenever the calculated distance between the two mobile communication terminal is approached by a predetermined distance. . When the calculated distance between the two mobile communication terminals is within a preset predetermined distance, the notification of the proximity presence of the notification subject is stopped.

On the other hand, the mobile communication terminal having a notification subject proximity presence indication function of the present invention for achieving the above another object, the receiving unit for receiving a proximity presence notification signal of the notification subject; A display unit which displays a message included in the received notification signal; And a controller configured to control the message to be displayed on the display unit.

Here, the controller controls to return to the previous state when the message is displayed for a predetermined time.

In addition, the mobile communication terminal, the input unit for receiving a call command of the user of the mobile communication terminal; And a transmitting unit which transmits a call signal for calling the notification target's mobile communication terminal, wherein the control unit inputs a call command through the input unit for a predetermined time during which the notification subject proximity presence notification message is displayed. If so, the transmitter controls the mobile communication terminal number of the notification subject.

According to the mobile communication service system and the mobile communication terminal of the present invention as described above, it is possible to determine whether there is a close distance to the notification target registered by the user of the mobile communication terminal, so that the community between the user and the notification target becomes active. You will be able to solve the boredom and frustration of acquiring the opportunity to accompany and waiting.

Hereinafter, with reference to the accompanying drawings will be described in detail the present invention.

1 is a diagram illustrating a network configuration of a notification subject proximity notification service system using location information of a mobile communication terminal according to the present invention. The system includes a mobile communication terminal 11 of the user, a mobile communication terminal 12 of the notification subject, a base station 20, a communication satellite 30, a location information acquisition server 40, and a notification target proximity notification server 50. Are interconnected organically via the Internet and wired and wireless networks.

Here, the mobile communication terminals 11 and 12 periodically transmit an outgoing signal indicating their location to the base station 20 and / or the communication satellite 30. When the proximity presence notification signal indicating the proximity of the notification subject is received through the base station 20 and / or the communication satellite 30, the proximity presence message of the notification subject is displayed on the display.

The base station 20 receives a mobile communication signal including a location calling signal transmitted from the mobile communication terminals 11 and 12, and acquires location information of the mobile communication terminal together with its own identification information for the location calling signal. Transfer to server 40. In addition, the base station 20 receives the proximity existence notification signal transmitted from the notification subject proximity notification server 40, and transmits the proximity notification signal to the service user mobile communication terminal 11. Here, the base station 20 is represented as one base station, but includes a plurality of base stations, and includes all of the base station, the telephone station and the relay station communicating with the mobile communication terminals. In addition, the base station 20 may be connected to the Internet by wire and / or wireless.

The communication satellite 30 receives the position originating signal transmitted from the mobile communication terminals 11 and 12, and transmits the position information of the mobile communication terminals 11 and 12 to the satellite base station (not shown) on the ground. It transmits to the location information acquisition server 40 through.

The location information acquisition server 40 detects the locations of the mobile communication terminals 11 and 12 based on the information received from the base station 20 and / or the satellite 30 and uses the determined location information as the mobile communication terminal. (11) Matches and stores each identifier according to (12) (for example, a telephone number of a mobile communication terminal), and the location information together with the identifier information of the mobile communication terminals (11) (12) close to the notification subject. Send to notification server 50.

The notification subject proximity notification server 50 stores the location information of the mobile communication terminals 11 and 12 transmitted from the location information acquisition server 40 according to an identifier (for example, the service subscriber's information). Name and / or phone number). When the distance between the two mobile communication terminals 11 and 12 is within a predetermined distance from the location information of the user's mobile communication terminal 11 and the location information of the mobile communication terminal 12 of the notification subject, the user's mobile communication terminal In step (11), the neighboring notification signal of the subject to be notified is transmitted.

Here, the location information acquisition server 40 obtains the location information of the plurality of base stations 20 receiving the outgoing signals of the mobile communication terminals 11 and transmits the location information to the notification subject proximity notification server 50, and the notification subject proximity. The notification server 50 is one or more of the base stations 20 overlapping each other among the plurality of base stations 20 that have received the outgoing signal from the mobile communication terminals 11 and 12 of the user and the notification subject. Notify the proximity of the subject. If all of the base stations 20 receiving the location origination signal match, the notification may be stopped. On the other hand, the position information acquisition server 40, the position of the mobile communication terminals 11, 12 through the base stations 20 that received the outgoing signal from the mobile communication terminals (11) 12, The coordinates are calculated and transmitted to the notification subject proximity notification server 50, and the notification subject proximity notification server 50 is the actual position coordinates of the mobile communication terminals 11 and 12 transmitted from the location information acquisition server 40. The distance between the mobile communication terminal 11 of the user and the mobile communication terminal 12 of the notification subject can be calculated, and the proximity of the notification subject can be notified to the mobile communication terminal 11 of the user through the base station. Alternatively, it is possible to grasp the position coordinates through the base station and perform notification and interruption of notification from preset distances through distance calculation between two mobile communication terminals. Alternatively, the location information acquisition server 40 obtains all of the location information of the mobile communication terminal transmitted from the base station 20 and the communication satellite 30 and delivers the location information to the near notification server 40 to be informed of. The proximity notification server 50 may integrate location information transmitted from the base station 20 and the communication satellite 30, measure the distance from the user to the notification subject more accurately, and perform notification accordingly.

In the above system, the location information acquisition server 40 and the notification subject proximity notification server 50 may be integrated into one system, and the database used in each server may be integrated.

2 is a block diagram of the notification subject proximity notification server 50 shown in FIG. The notification subject proximity notification server 50 includes a web server 52, a database server 54, a proximity notification server 56, and a database 58.

The web server 50 provides wireless Internet content and / or wired Internet content so that a service user can register a proximity presence notification subject through a mobile communication terminal and / or a computer. In the wired and / or wireless content provided by the web server 50, the mobile terminal user can check the registration of the proximity notification service of others to his mobile terminal, and the mobile terminal user can move his or her mobile device. It includes the content that can be set so that the proximity presence is not notified for the registration of the proximity presence notification service of others to the communication terminal. Then, the message received through the content is transferred to the database server 54.

The database server 54 matches the input contents transmitted through the user interface and the history information of the service user and the identification information of the user mobile communication terminal transmitted through the wired / wireless Internet contents to the service user and stored in the database 58. do. In addition, the database 58 is updated or changed according to the user's message transmitted through the web server 52. In addition, the location information of the mobile communication terminals 11 and 12 obtained through the base station 20 and / or the communication satellite 30 may be matched with an identifier of each of the mobile communication terminals 11 and 12 to obtain a database ( 58) to be registered. At this time, the database server 54 updates the database 58 according to the location information of the mobile communication terminals 11 and 12 which are periodically transmitted. 3 is a diagram illustrating an example of the configuration of the database 58.

The proximity notification server 56, in the database 58 as shown in Fig. 3, the location information of each mobile communication terminal 11, 12 that matches the user and the identifier of the mobile communication terminal 12 of the notification subjects according to the user. Determine the proximity between the user and the notification subject. When it is determined that the distance between the user and the mobile communication terminals 11 and 12 of each of the notification targets is within a preset proximity distance, the user's mobile communication terminal notifies the proximity distance existence of the notification target.

4 is a block diagram of a mobile communication terminal according to the present invention. The mobile communication terminal includes an input unit 110, a transmitter / receiver 120, a display 130, and a controller 140.

The input unit 110 includes a plurality of input keys for receiving a user's command. In addition, the microphone may be configured to receive a command through a user's voice. The input key includes a numeric key (1 ~ 0) for receiving the identifier for the notification subject and the identification number of the mobile communication terminal of the notification subject from the user (ㄱ ~ ㅎ, ㅏ ~ ㅣ, A ~ Z, ㆍ). do. It may also be provided with a character key and a numeric key, respectively. In addition, a plurality of keys are provided, such as a selection key (▲ / ▼) for selecting a menu, a 'confirm' key combined with a 'next' key for confirming selection of an item, and an 'upper' key for an upper return menu. .

The transmitter 120 transmits a mobile communication signal according to a message, such as a user's input key selection and a location call signal generated automatically, to the base station 30. The mobile communication signal includes a self-location notification signal periodically transmitted, a message according to a user input, and a call signal for a notification target.

The receiver 120 receives a mobile communication signal transmitted from the base station 30. In this case, the mobile communication signal includes a proximity notification signal transmitted from the notification subject proximity notification server 50. The proximity notification signal includes the proximity notification message of the notification subject and the mobile communication terminal identification number of the notification subject.

The display 130 includes an LCD for displaying a screen, and displays a notification message included in the proximity notification signal on the LCD screen. At this time, the mobile communication terminal identification number of the notification subject may be displayed together, and only the notification target mobile communication number may be displayed without a message. In addition, the display 130 may include a speaker, and may display a notification message by voice through the speaker.

The controller 140 controls the entire mobile communication terminal, and when the proximity presence notification signal of the notification subject is received by the receiver 120, the controller 140 controls the display 130 to display the proximity existence notification message of the notification subject. In addition, when a call command is input through the input unit 110 for a predetermined time during which the notification subject proximity existence notification message is displayed, the transmitter 120 controls to call the notification target's mobile communication terminal. In addition, the controller 140 controls the system to access the wireless Internet contents provided by the notification subject proximity notification server 50.

5 to 10 are diagrams illustrating an example of a screen display according to service use of a mobile communication terminal using a notification subject proximity presence notification service. FIG. 5 is an example of a menu screen provided by the notification subject proximity notification server 50 when the user approaches the notification subject proximity notification server 50 through his mobile communication terminal. The menu on the menu screen contains' 1. Registration of subjects', 2. See who's selected you 'and' 3. You'll see a menu called "View people you choose."

FIG. 6A is a screen displayed when the user selects '1, register notification subject' through the selection key (▲ / ▼) provided in the mobile communication terminal. On the screen, the name of the notification subject and the mobile communication terminal number are displayed to be input by the user. Thereafter, when the user inputs the name of the notification subject and the mobile communication terminal number through the character keys and numeric keys, and selects a key corresponding to 'next', the notification distance between the notification subject and the user is set as shown in FIG. 6B. Is displayed. You can register in meters and / or in kilometers. Next, when the user selects a key corresponding to 'next' in the screen display state of FIG. 6B, a notification period screen as shown in FIG. 6C is displayed. The notification period allows registration in minutes and / or seconds and / or meters. For example, after the target person is approached within the set distance from the user and the initial proximity indication for the target person is reached, the user can be notified of the target person in minutes every minute when the approaching distance approaches. You may be notified. In addition, when the approaching distance is getting closer, it can be notified every set distance. This operation is displayed within the notification distance and can be ignored outside the notification distance. Meanwhile, when the user selects a key corresponding to 'next' in the screen display state of FIG. 6C, a screen for setting a notification interruption distance is displayed as shown in FIG. 6D. This prevents the user from being notified of unnecessary notifications when the notification targets exist within a certain distance from the user. When the user selects confirmation in the screen display state of FIG. 6D, a screen for recognizing the user that registration of the notification subject is completed is displayed as shown in FIG. 6E. Meanwhile, when a key corresponding to 'clear' is selected in the above screens, the previously input contents are deleted, and when a key corresponding to 'upper' is selected, the screen is returned to the previous screen.

On the other hand, in the menu screen of Figure 5 '2. In the case of 'View me selected' menu is selected, a list of people selected to me is displayed on the screen as shown in FIG. 7A. Then, when the user moves the '▶' mark up or down through the selection key (▲ / ▼) to position one person in the list of the selected people and selects the key corresponding to the selection, the user selects me as shown in FIG. 7B. Display the 'Yes' and 'No' menus to allow a person to decide whether to allow the user's notification. Subsequently, when the user selects 'no', the mobile communication terminal may transmit a message to the notification subject proximity notification server 50 so that the user may no longer be notified. In this case, when the notification target proximity notification server 50 receives the proximity notification allowable message transmitted from the mobile communication terminal, the notification is performed so that the corresponding user is no longer notified. For example, an identifier of a user who has not received a notification allowable message may be deleted from a database matched to a registered user, or may be notified by a separate display.

In addition, in the menu screen of Figure 5 '3. If the View my selected person 'menu is selected, a list of people selected by me is displayed on the screen as shown in FIG. And when the user moves the '▶' mark up and down through the select key (▲ / ▼) to position it on any one person in the list of selected people, and selects the key corresponding to 'select', I selected as shown in FIG. 7B. Displays the 'Yes' and 'No' menus to determine if a person is deregistered. Subsequently, if the user selects 'Yes', the mobile communication terminal may transmit a registration deletion request message to the notification subject proximity notification server 50 so that the user can no longer be notified of the mobile communication terminal user. At this time, of course, the notification subject proximity notification server 50 performs a process for the received message.

FIG. 9 shows an example of a screen display in which the proximity presence of the notification destination is displayed on the mobile communication terminal of the notification subject proximity presence notification service user of the present invention.

According to the notification subject proximity presence notification service system and the service method of the present invention as described above, the user of the mobile communication terminal can be notified of the proximity presence when the desired target is present in the proximity, have the opportunity to accompany. In addition, the proximity of the promised object can be identified whether or not to reduce the boredom of waiting.

In addition, even when the meeting place is crowded, it is easy to find the proximity of each other because it is easy to find. In particular, even if the person does not know each other's face, it is possible to determine whether the other party is nearby, thereby reducing the frustration.

In the above description of the preferred embodiment of the present invention, the present invention is not limited to the above-described embodiment, it will be well known that it includes a variety of design changes.

Claims (20)

A database in which a user's mobile communication terminal identifier matched with a user and a mobile communication terminal identifier of a notification subject registered by the user are registered; Acquires the location information of the mobile communication terminal of the user and the location information of the mobile communication terminal of the notification subject registered by the user, and processes the location information of each of the mobile communication terminals to be stored by matching each identifier of the database; Database server; And If it is determined whether there is a proximity between the user and the notification subject through the location information of the mobile communication terminals stored in the database, and if it is determined that the distance between the user mobile communication terminal and the notification target mobile communication terminal is a proximity distance And a proximity notification server for notifying a proximity presence of the notification subject to a mobile communication terminal of the user. The method of claim 1, And a web server for providing wireless internet contents and / or wired internet contents so that the user can register the proximity existence notification service notification subject through a mobile communication terminal and / or an internet terminal. And the database server updates the database according to the registration contents transmitted through the web server. The method of claim 2, The wired and / or wireless content provided by the web server may include a content that a user of the mobile communication terminal may check for registration of a proximity notification service of another person with respect to the mobile communication terminal. Proximity presence notification system. The method of claim 3, The wired and / or wireless content provided by the web server may include content that allows a user of the mobile communication terminal to set such that a proximity presence is not notified of registration of a proximity presence notification service of another person to his mobile communication terminal. Notification subject proximity presence notification service system, characterized in that. The method of claim 1, Further comprising a web server for providing a wired and / or wireless content that the user can set the proximity of the notification subject, The proximity presence notification server, the proximity target notification system for notification of the subject, characterized in that the notification of the proximity of the subject when the subject is present from the user within the proximity set by the wire and / or content. The method of claim 1, The database server obtains the unique information of a plurality of base stations receiving the self-location notification signal periodically sent from each mobile communication terminal, The proximity existence notification server, if there is a base station overlapping each other among the base stations that received the self-location notification signal of the user mobile communication terminal and the notification target mobile communication terminal from the location information of the base station obtained by the database server And determining that the user and the notification subject exist in close proximity to each other. The method of claim 1, The notification subject proximity notification server, the notification distance of the multi-step from the location of the user mobile communication terminal is set in advance, and characterized in that each time the calculated distance between the two mobile communication terminals is approached by a predetermined distance, characterized in that Notification subject proximity presence notification service system. The method of claim 1, The notification subject proximity notification server, the notification subject proximity presence notification service system, characterized in that to stop the notification of the presence of the notification subject, if the calculated distance between the two mobile communication terminal is within a predetermined predetermined distance. Matching an identifier of a mobile communication terminal of a user and an identifier of a notification target mobile communication terminal registered as a service target by the user to the user and storing the identifier; Obtaining location information of the user mobile communication terminal and location information of a notification target mobile communication terminal registered by the user; Storing location information of the mobile communication terminals by matching each identifier; Determining whether there is a proximity between the user and the notification subject based on the obtained position information of the mobile communication terminals; And And when the distance between the user mobile communication terminal and the notification target mobile communication terminal is determined to be a close distance, notifying the proximity presence of the notification target to the user's mobile communication terminal. Presence notification service method. The method of claim 9, Providing wireless Internet content and / or wired Internet content so that the user can register the subject of the proximity notification service through a mobile communication terminal and / or an internet terminal. Notification service method. The method of claim 10, The wireless Internet contents and / or wired Internet contents may include a service content that a user of the mobile communication terminal may include service contents that may be checked for registration of a proximity notification service of another person to the mobile communication terminal. Notification Service Method. The method of claim 11, The wireless Internet contents and / or wired Internet contents may include contents that the user of the mobile communication terminal may set such that the proximity presence notification service is not notified of registration of the proximity presence notification service of another person with respect to the mobile communication terminal. Characterized by proximity notification service method characterized in that the subject. The method of claim 9, Providing the wired and / or wireless content through which the user can set the proximity notification distance of the notification subject; Proximity proximity notification step of the notification subject, the notification subject proximity characterized in that the notification of the proximity distance presence of the notification subject when there is a notification subject from the user within a distance set through the wire and / or content. Presence notification service method. The method of claim 1, The acquiring of the location information of the mobile communication terminals may include obtaining location information of a plurality of base stations receiving the self location notification signal periodically transmitted from the user mobile communication terminal and the notification target mobile communication terminal. , The step of determining whether the user and the notification subject are in close proximity may include the case where the user and the notification subject are close when the base station receiving the self-location notification signal transmitted from the user mobile communication terminal and the notification target mobile communication terminal overlaps each other. Notification subject proximity presence notification service method characterized in that it is determined to exist in the street. The method of claim 9, The step of notifying the proximity presence of the notification subject to the user mobile communication terminal, the notification subject proximity presence notification service method characterized in that each time the calculated distance between the two mobile communication terminals is approached by a predetermined distance. . The method of claim 9, The notifying of the proximity presence of the notification subject to the subscriber mobile communication terminal, if the calculated distance between the two mobile communication terminals is within a predetermined predetermined distance, the proximity presence notification service of the notification subject is suspended. Notification subject proximity presence notification method. A receiver for receiving a proximity presence notification signal of the notification subject; A display unit which displays a message included in the received notification signal; And And a controller for controlling the message to be displayed on the display unit. The method of claim 17, An input unit for receiving a call command of a user of the mobile communication terminal; A storage unit for storing a mobile communication terminal number of a proximity presence notification target included in the proximity presence notification signal; And And a transmitter for transmitting a call signal for calling the notification target's mobile communication terminal. If the call command is input through the input unit for a predetermined time during which the notification subject proximity presence notification message is displayed, the controller controls to call the mobile communication terminal number of the notification subject stored in the storage unit through the transmitter. Mobile communication terminal characterized in that. Receiving a proximity presence notification signal of the notification subject; And And displaying the proximity presence message of the notification subject included in the received notification signal. The method of claim 19, Calling a mobile communication terminal of the notification subject, if a call command is input for a predetermined time during which the notification target proximity presence notification message is displayed, further comprising a method of displaying the notification target proximity presence of the mobile communication terminal. .