JP6534623B2 - Communication terminal, communication system and communication method - Google Patents

Description

  The present invention relates to a communication terminal, a communication system and a communication method.

  In the past, it has been practiced to make a watching target person carry a communication terminal and to notify that effect when the watching target person gets lost by the communication terminal. For example, Patent Document 1 discloses that, in response to the communication terminal carried by the watching target being carried away from the communication terminal carried by the watching person, notification that the watching target is lost is disclosed. There is.

JP, 2000-287265, A

  By the way, there are cases where a plurality of watchers and one watcher go out together. Then, while going out, the watching target person and the first watching person may act together, and the second watching person may take another action. In this case, when the technology described in Patent Document 1 is used, the communication terminal of the watching target person is not getting lost even though the watching target person acts with the first watcher and is not lost. There is a problem in that the second watcher is notified that he or she got lost in response to leaving the communication terminal.

  Therefore, the present invention has been made in view of these points, and in the case where there are a plurality of watchers, a communication terminal and communication that can be appropriately coped with when support for the watch target person becomes necessary. It aims at providing a system and a communication method.

  The communication terminal according to the first aspect of the present invention performs wireless communication by a method different from the first communication unit that performs wireless communication for specifying the degree of separation between itself and another terminal, and the first communication unit. A second communication unit, a storage unit for storing terminal identification information for identifying each of the plurality of other terminals designated as targets to be monitored for the communication status of wireless communication by the first communication unit; and the first communication unit When the communication status of the wireless communication according to the present invention changes to a communication status indicating that the communication terminal itself is separated from each of the plurality of other terminals by a predetermined distance or more, the second communication unit causes the plurality of the plurality of the terminals to And a communication control unit that performs wireless communication with at least one of the other terminals.

  When the communication status of the wireless communication by the first communication unit changes to a communication status indicating that the communication terminal is separated from each of the plurality of other terminals by a predetermined distance or more, the communication terminal performs the second communication unit. A display unit for displaying on the display unit a screen for receiving a start instruction of wireless communication with a plurality of the other terminals according to a second reception unit, and the communication control unit receiving the start instruction; The communication unit may perform wireless communication with at least one of the plurality of other terminals based on the terminal identification information.

  When the communication status of the wireless communication by the first communication unit changes to a communication status indicating that the communication terminal is separated from each of the plurality of other terminals by a predetermined distance or more, the communication terminal performs the plurality of other terminals The communication control unit further includes a reception unit for receiving selection of another terminal performing wireless communication by the second communication unit, and the communication control unit performs wireless communication with the other terminal selected by the second communication unit. It is also good.

  The receiving unit may change the communication status of the wireless communication by the first communication unit to a communication status indicating that the communication terminal is separated from each of the plurality of other terminals by a predetermined distance or more, the plurality of other terminals In response to each of the above, a screen may be displayed that accepts an instruction to start wireless communication by the second communication unit, and selection of another terminal performing wireless communication by the second communication unit may be received via the screen. .

The receiving unit may change the communication status of the wireless communication by the first communication unit to a communication status indicating that the communication terminal is separated from each of the plurality of other terminals by a predetermined distance or more, the plurality of other terminals To display a screen for receiving an instruction to start wireless communication by the second communication unit corresponding to a specific other terminal among the above, and the communication control unit causes the second communication unit to display one screen with the other terminal. Wireless communication may be performed.
The reception unit may specify the other specified terminal based on a predetermined condition, and display a screen for receiving an instruction to start wireless communication by the specified other terminal and the second communication unit.

  An acquisition unit configured to acquire the terminal identification information from each of the plurality of other terminals when an instruction to monitor the communication status of wireless communication with the plurality of other terminals by the first communication unit is received; The storage control unit may further include a storage control unit that stores the plurality of acquired terminal identification information in the storage unit.

  A communication system according to a second aspect of the present invention is a communication system including a plurality of first communication terminals and a second communication terminal, wherein the plurality of first communication terminals and the second communication terminal are: And a second communication unit performing wireless communication by a method different from the first communication unit, the first communication unit performing wireless communication for specifying the degree of separation between itself and another terminal, and the second communication unit A terminal includes a storage unit storing terminal identification information identifying each of the plurality of first communication terminals designated as targets to monitor the communication status of wireless communication by the first communication unit; and a terminal according to the first communication unit When the communication status of the wireless communication changes to a communication status indicating that the second communication terminal is separated from each of the plurality of first communication terminals by a predetermined distance or more, the second communication unit changes the terminal identification information to the terminal identification information. A plurality of the first communication terminals based on Further having at least a communication control unit that performs wireless communication with any of the.

  A storage unit that stores terminal identification information that identifies the second communication terminal designated as a target for monitoring the communication status of wireless communication by the first communication unit, at least one of the plurality of first communication terminals; When the communication status of wireless communication by the first communication unit changes to a communication status indicating that the first communication unit is separated from the second communication terminal by a predetermined distance or more, the wireless communication with the second communication terminal by the second communication unit is performed. A screen for receiving a start instruction of communication is displayed on the display unit, and a reception unit for receiving the start instruction, and the second communication unit, when the start instruction is received, the second communication terminal based on the terminal identification information. And a communication control unit that performs wireless communication with the communication terminal.

A storage unit storing terminal identification information identifying the second communication terminal designated as a target for monitoring the communication status of wireless communication by the first communication unit; When the communication status of the wireless communication by the first communication unit changes to a communication status indicating that the communication terminal itself is separated from the second communication terminal by a predetermined distance or more, the second communication unit performs wireless communication with the second communication terminal When a screen for receiving a start instruction is displayed on the display unit, and a reception unit for receiving the start instruction, and the start instruction is received, the second communication unit performs communication with the second communication terminal based on the terminal identification information. The apparatus may further include a communication control unit that performs wireless communication, and the reception unit may display the screen at different timings on each of the plurality of first communication terminals.
Each of the plurality of first communication terminals communicated with the second communication terminal to the first communication terminal different from itself when performing wireless communication with the second communication terminal by the second communication unit. You may further provide the notification part which notifies the information which shows that.

  A communication method according to a third aspect of the present invention performs wireless communication by a method different from the first communication unit that performs wireless communication for specifying the degree of separation between itself and another terminal, and the first communication unit. A storage unit stores terminal identification information that identifies each of the plurality of other terminals designated as targets to be monitored for the communication status of wireless communication by the first communication unit, which is executed by a computer including a second communication unit. And the second communication unit causes the second communication unit to change the communication state of the wireless communication by the first communication unit to a communication state indicating that the first communication unit is separated from each of the plurality of other terminals by a predetermined distance or more. Wirelessly communicating with at least one of the plurality of other terminals based on terminal identification information.

  ADVANTAGE OF THE INVENTION According to this invention, when there exist several watchers, it is effective in the ability to be made to respond | correspond appropriately, when support to a watch subject is needed.

It is a figure showing an outline of a communication system concerning this embodiment. It is a figure which shows the structure of the 1st communication terminal which concerns on this embodiment. It is a figure which shows the structure of the 2nd communication terminal which concerns on this embodiment. It is a flowchart which shows the flow of the process at the time of pairing. It is a figure which shows an example of a monitoring screen. It is a flowchart which shows the flow of a process at the time of monitoring of the communication condition of the radio | wireless communication with the other terminal by a 1st communication part. It is a figure which shows the example of a notification of the separation degree by a monitoring screen. It is a figure which shows the example of notification of the separation degree with the 1st communication terminal in a 2nd communication terminal. It is a figure which shows an example of the warning screen displayed on a 1st communication terminal. It is a figure which shows an example of the warning screen displayed on a 2nd communication terminal. It is a figure which shows the other display example of the warning screen displayed on a 2nd communication terminal.

[Configuration of Communication System S]
FIG. 1 is a diagram showing an outline of a communication system S according to the present embodiment.
The communication system S includes a plurality of first communication terminals 1 (for example, the first communication terminal 1A and the first communication terminal 1B) possessed by the watcher, and a second communication terminal 2 possessed by the person subject to watching. Here, the watching target is, for example, a child, and the watching target is, for example, a guardian (parent) of the child.

  The first communication terminal 1 is a computer that includes a control unit and a storage unit and can be carried by a watcher. The first communication terminal 1 is, for example, a mobile phone such as a smartphone, and a first communication unit that performs wireless communication for specifying the degree of separation between itself and another terminal (second communication terminal); And a second communication unit configured to perform wireless communication in a method different from the above.

  The second communication terminal 2 includes a control unit and a storage unit, and is, for example, a wearable computer that the watching target can wear on the body. The second communication terminal 2 is, for example, a wristwatch-type mobile phone, and includes the first communication unit and the second communication unit as in the first communication terminal 1.

  Each of a plurality of watchers who possess the first communication terminal 1 operates the first communication terminal 1 when acting with the watching target person who possesses the second communication terminal 2, and the watching target person leaves the watching person Turn on the function (monitoring function) that monitors whether or not it is.

  In response to the monitoring function being turned on, the first communication terminal 1 communicates with the second communication terminal 2 possessed by the person to be watched by wireless communication with the first communication unit. The communicable distance of the first communication unit is, for example, about 50 m, and when the first communication terminal 1 can communicate with the second communication terminal 2 by the first communication unit, the watching target person is away from the watching person It is determined that there is not.

  If the first communication terminal 1 can not communicate with the second communication terminal 2 by wireless communication with the first communication unit, or if the radio wave intensity of radio waves received from the second communication terminal 2 changes to a predetermined threshold or less, the monitoring target It is determined that the person has left the watcher. When the first communication terminal 1 determines that the watching target person is away from the watching person, the second communication unit wirelessly communicates with the second communication terminal 2 to communicate between the watching target person and the watching person by telephone or the like. To be possible.

  Similarly, when the second communication terminal 2 can not communicate with each of the plurality of first communication terminals 1 by wireless communication by the first communication unit, the second communication terminal 2 determines that the watcher has left the watching target person. When the second communication terminal 2 determines that the watcher is away from the watch target person, the second communication unit wirelessly communicates with at least one of the plurality of first communication terminals 1 and watches with the watch target person by telephone etc. Enable communication with other people.

By doing this, the watching target person carrying the second communication terminal 2 is separated from the watching person via the second communication unit when any of a plurality of watching people carrying the first communication terminal 1 is separated. I can communicate. Therefore, the 2nd communication terminal 2 can make a surveillance object person correspond appropriately, when a surveillance object person leaves any of a plurality of surveillance persons.
Subsequently, configurations of the first communication terminal 1 and the second communication terminal 2 will be described.

[Configuration of First Communication Terminal 1]
FIG. 2 is a diagram showing the configuration of the first communication terminal 1 according to the present embodiment. The first communication terminal 1 includes an input unit 11, a display unit 12, a first communication unit 13, a second communication unit 14, a storage unit 15, and a control unit 16.

The input unit 11 is, for example, a button or a touch panel, and receives an operation input from the user of the first communication terminal 1.
The display unit 12 is, for example, a liquid crystal display or an organic EL (Electro-Luminescence) display, and displays various types of information according to the control of the control unit 16.

  The first communication unit 13 performs wireless communication to determine the degree of separation between itself and the second communication terminal 2. The first communication unit 13 performs wireless communication with the second communication terminal 2 by a short distance wireless communication method such as BLE (Bluetooth Low Energy) (registered trademark) whose communicable distance is a predetermined distance (for example, 50 m). Do.

  The first communication unit 13 receives, for example, a beacon signal transmitted from the second communication terminal 2. The first communication unit 13 measures the radio wave intensity of the radio wave corresponding to the received beacon signal. The first communication unit 13 outputs, to the control unit 16, information indicating the measured radio wave intensity and the beacon ID included in the beacon signal.

  The second communication unit 14 performs wireless communication in a method different from that of the first communication unit 13. For example, the second communication unit 14 communicates with the second communication terminal 2 via a communication network such as a cellular phone line or the Internet.

  The storage unit 15 is, for example, a ROM, a RAM, and the like. The storage unit 15 stores various programs for causing the first communication terminal 1 to function. The storage unit 15 causes the control unit 16 of the first communication terminal 1 to function as the first reception unit 161, the acquisition unit 162, the storage control unit 163, the communication control unit 164, the second reception unit 165, and the notification unit 166. Memory program. The storage unit 15 may read and store a program stored in a storage medium such as an external memory, or may store a program downloaded from an external device via a communication network.

  A storage medium connected to the first communication terminal 1 is also included in the storage unit 15. The storage medium connected to the first communication terminal 1 stores, for example, the telephone number of the first communication terminal 1 (hereinafter also referred to as a first telephone number) as identification information for identifying the first communication terminal 1. It is a SIM card.

  The storage unit 15 also uses a user ID pre-assigned to the second communication terminal 2 and the name of the watching target person as terminal identification information for identifying the second communication terminal 2 possessed by the watching target person to be monitored. Remember.

  The control unit 16 is, for example, a CPU. The control unit 16 controls the functions related to the first communication terminal 1 by executing various programs stored in the storage unit 15. The control unit 16 includes a first reception unit 161, an acquisition unit 162, a storage control unit 163, a communication control unit 164, a second reception unit 165, and a notification unit 166. Details of these functions will be described later.

[Configuration of second communication terminal 2]
FIG. 3 is a diagram showing the configuration of the second communication terminal 2 according to the present embodiment. The second communication terminal 2 includes an input unit 21, a display unit 22, a first communication unit 23, a second communication unit 24, a storage unit 25, and a control unit 26.
The functions of the input unit 21, the display unit 22, the first communication unit 23, and the second communication unit 24 are the same as those of the input unit 11, the display unit 12, the first communication unit 13, and the second communication unit 14 of the first communication terminal 1. The description is omitted because it is the same as the function of.

  The storage unit 25 is, for example, a ROM, a RAM, and the like. The storage unit 25 stores various programs for causing the second communication terminal 2 to function. The storage unit 25 stores a watching program that causes the control unit 26 of the second communication terminal 2 to function as the acquisition unit 262, the storage control unit 263, the communication control unit 264, the reception unit 265, and the notification unit 266. The storage unit 25 may read and store a program stored in a storage medium such as an external memory, or may store a program downloaded from an external device via a communication network.

  A storage medium connected to the second communication terminal 2 is also included in the storage unit 25. The storage medium connected to the second communication terminal 2 stores, for example, the telephone number (hereinafter also referred to as a second telephone number) of the second communication terminal 2 as identification information for identifying the second communication terminal 2. It is a SIM card.

  In addition, the storage unit 25 is a terminal identification information identifying the first communication terminal 1 possessed by each of a plurality of watchers, and a watcher and a user ID pre-assigned to each of the plurality of first communication terminals 1 And the name of the person (eg, mother, father, etc.).

The control unit 26 is, for example, a CPU. The control unit 26 controls the functions related to the second communication terminal 2 by executing various programs stored in the storage unit 25. The control unit 26 includes an acquisition unit 262, a storage control unit 263, a communication control unit 264, a reception unit 265, and a notification unit 266.
Subsequently, the details of the functions of the first communication terminal 1 and the second communication terminal 2 will be described with reference to the flowcharts as appropriate.

[Flow of processing at the time of pairing]
First, the flow of processing at the time of pairing performed when monitoring of the second communication terminal 2 is started by the first communication terminal 1 will be described. FIG. 4 is a flowchart showing the flow of processing at the time of pairing. In the example illustrated in FIG. 4, a flow of processing relating to pairing of one first communication terminal 1 and the second communication terminal 2 is illustrated.

  First, the first reception unit 161 of the first communication terminal 1 receives an instruction for monitoring the communication status of wireless communication with the second communication terminal 2 by the first communication unit 13. Specifically, in response to having received the display request for the monitoring screen for monitoring the second communication terminal 2 through the input unit 11, the first receiving unit 161 displays the monitoring screen on the display unit 12 Display on.

  FIG. 5 is a diagram showing an example of the monitoring screen. In the example illustrated in FIG. 5, a fan-shaped distance notification image A1 indicating an approximate distance from the first communication terminal 1 to the second communication terminal 2 and an object P indicating the first communication terminal 1 are displayed. In the example shown in FIG. 5, “ON” is displayed, an on button for receiving a monitoring instruction, and “off” displayed as “OFF”, and an off button for receiving a monitoring end instruction for ending the monitoring are provided. ing.

  The first accepting unit 161 determines whether or not an on button is pressed on the monitoring screen and a monitoring instruction has been received (S1). If the first accepting unit 161 determines that the monitoring instruction has been accepted, the process proceeds to S2, and if it is determined that the monitoring instruction is not accepted, the first accepting unit 161 re-executes S1.

  When the first reception unit 161 receives a monitoring instruction, the acquisition unit 162 of the first communication terminal 1 acquires the second telephone number from the second communication terminal 2. In addition, the acquisition unit 262 of the second communication terminal 2 receives the first telephone number from the first communication terminal 1 when an instruction to monitor the communication state of the wireless communication with the first communication terminal 1 by the first communication unit 23 is received. get.

Specifically, the acquisition unit 162 of the first communication terminal 1 causes the first communication unit 13 to transmit a search signal for searching the second communication terminal 2 (S2).
When the acquisition unit 262 of the second communication terminal 2 receives the search signal (S3), the acquisition unit 262 determines that the instruction to monitor the communication state of the wireless communication with the first communication terminal 1 by the first communication unit 23 is accepted. The acquisition unit 262 causes the first communication unit 23 to transmit a response signal corresponding to the search signal (S4).

  When the acquisition unit 162 of the first communication terminal 1 receives the response signal from the second communication terminal 2 (S5), the first telephone stored in the storage unit 15 of the first communication terminal 1 is a telephone number assigned to itself. The number is acquired (S6) and transmitted to the second communication terminal 2 (S7).

When the acquisition unit 262 of the second communication terminal 2 receives the first telephone number (S8), the storage control unit 263 sets the first telephone number as a target for monitoring the communication status of the wireless communication by the first communication unit 23. It is stored in the storage unit 25 as terminal identification information for identifying the designated first communication terminal 1 (S9).
In addition, the acquisition unit 262 of the second communication terminal 2 acquires the second telephone number, which is a telephone number assigned to itself, stored in the storage unit 25 of the second communication terminal 2 (S10). To (S11).

  When the acquisition unit 162 of the first communication terminal 1 receives the second telephone number (S12), the storage control unit 163 sets the second telephone number as a target for monitoring the communication status of the wireless communication by the first communication unit 13. The storage unit 15 is stored as terminal identification information for identifying the designated second communication terminal 2 (S13). Thereby, pairing of the first communication terminal 1 and the second communication terminal 2 is completed, and the monitoring of the communication state of the wireless communication with the second communication terminal 2 by the first communication unit 13 is started.

  In the present embodiment, the second communication terminal 2 performs pairing with a plurality of first communication terminals 1 (the first communication terminal 1A and the first communication terminal 1B). Thereby, the storage control unit 263 causes the storage unit 25 to store the first telephone number (terminal identification information) acquired from each of the plurality of first communication terminals 1.

[Flow of processing during monitoring]
Subsequently, the communication control unit 164 of the first communication terminal 1 monitors the communication status of the wireless communication with the second communication terminal 2 by the first communication unit 13. The communication control unit 164 controls the second communication terminal based on the terminal identification information (second telephone number) by the second communication unit 14 based on the communication status of the wireless communication with the second communication terminal 2 by the first communication unit 13. Wireless communication with 2 is performed. Similarly, the communication control unit 264 of the second communication terminal 2 monitors the communication status of the wireless communication with each of the plurality of first communication terminals 1 by the first communication unit 23. The communication control unit 264 is based on the terminal identification information (first telephone number) by the second communication unit 24 based on the communication status of the wireless communication with each of the plurality of first communication terminals 1 by the first communication unit 23. Wireless communication with the first communication terminal 1 is performed. FIG. 6 is a flowchart showing the flow of processing when monitoring the communication status of the wireless communication with another terminal by the first communication unit.

First, the communication control unit 264 of the second communication terminal 2 causes the first communication unit 23 to transmit a beacon signal (S21). The first communication unit 23 transmits, for example, a beacon signal including the user ID of the watching target in the beacon ID.
The notification unit 166 of the first communication terminal 1 notifies the watcher of the degree of separation between the first communication terminal 1 and the second communication terminal 2 based on the reception status of the beacon signal by the first communication unit 13 (S22) .

  Specifically, when the first communication unit 13 receives the beacon signal, the notification unit 166 acquires, from the first communication unit 13, information indicating the reception strength of the radio wave corresponding to the beacon signal, and the reception strength The degree of separation from the second communication terminal 2 is determined based on the information indicating. The notification unit 166 causes the object W indicating the second communication terminal 2 to be displayed based on the determined degree of separation within the sector-shaped distance notification image A1 displayed on the monitoring screen.

  FIG. 7 is a diagram showing an example of notification of the degree of separation by the monitoring screen. It can be confirmed in FIG. 7A that the object W indicating the second communication terminal 2 is displayed. If the degree of separation from the second communication terminal 2 is small, the notification unit 166 causes the object W to be displayed at a position near the object P indicating the first communication terminal 1, and the degree of separation from the second communication terminal 2 is large. In this case, the object W is displayed at a position far from the object P.

  In addition, when the first communication unit 13 receives no beacon signal, or when the field intensity of the radio wave received by the first communication unit 13 from the second communication terminal 2 is less than or equal to a predetermined threshold, the notification unit 166 It is estimated that the distance between the first communication terminal 1 and the second communication terminal 2 is equal to or greater than the communicable distance (predetermined distance) of the first communication unit 13. In this case, the notification unit 166 hides the object W as shown in FIG. 7 (b).

Subsequently, the communication control unit 164 of the first communication terminal 1 determines whether the first communication unit 13 has received a beacon signal (S23). If the communication control unit 164 determines that the beacon signal is received, the process proceeds to S24. If it is determined that the beacon signal is not received, the process proceeds to S25.
In S24, the communication control unit 164 causes the first communication unit 13 to transmit a response signal of the beacon signal. The first communication unit 13 transmits, for example, a response signal including the user ID of the watcher. Thereafter, the communication control unit 164 shifts the processing to S22.

  In S25, the communication control unit 164 determines whether or not a predetermined time (for example, 10 seconds) has elapsed since the first communication unit 13 last received the beacon signal. If the communication control unit 164 determines that the predetermined time has elapsed since the beacon signal was last received, the process proceeds to S26, and if it is determined that the predetermined time has not elapsed since the beacon signal was last received, Transfer the process to S22.

  In S26, when a predetermined time has elapsed since the first communication unit 13 last received the beacon signal, the second reception unit 165 determines that the communication state of the first communication terminal 13 is the first communication terminal 1 It determines with having changed into the communication condition which shows that it is separated from the 2nd communication terminal 2 and more than predetermined distance. Then, the second reception unit 165 causes the display unit 12 to display a warning screen for receiving an instruction to start wireless communication with the second communication terminal 2 by the second communication unit 14. The process after displaying the warning screen will be described later.

  The notification unit 266 of the second communication terminal 2 notifies the target person of the separation degree between the first communication terminal 1 and the second communication terminal 2 based on the reception status of the response signal by the first communication unit 23 (S27) ). Similar to the notification unit 166 of the first communication terminal 1, the notification unit 266 acquires information indicating the reception intensity of the radio wave corresponding to the response signal from the first communication unit 23, and based on the information indicating the reception intensity, The degree of separation from the first communication terminal 1 is determined. Here, the notification unit 266 determines the degree of separation from each of the plurality of first communication terminals 1 based on the reception intensity of the radio wave corresponding to the response signal received from each of the plurality of first communication terminals 1.

  FIG. 8 is a diagram showing an example of notification of the degree of separation from the first communication terminal 1 in the second communication terminal 2. As shown in FIG. 8, a fan-shaped distance notification image A2 is displayed on the display unit 22 of the second communication terminal 2. The notification unit 266 causes the object W indicating the second communication terminal 2 to be displayed below the fan-shaped distance notification image A2, and a plurality of first objects are displayed based on the determined degree of separation inside the distance notification image A2. Objects P1 and P2 indicating each of the communication terminals 1 are displayed.

  Subsequently, the communication control unit 264 of the second communication terminal 2 determines whether the first communication unit 23 receives a response signal from at least one of the plurality of first communication terminals 1 (S28). If the communication control unit 264 determines that the response signal is received, the process proceeds to S21, and if it is determined that the response signal is not received, the process proceeds to S29.

  In S29, the communication control unit 264 determines whether a predetermined time (for example, 10 seconds) has elapsed since the first communication unit 23 last received a response signal from at least one of the plurality of first communication terminals 1. Determine If the communication control unit 264 determines that the predetermined time has elapsed since the last reception of the response signal, the process proceeds to S30, and if it is determined that the predetermined time has not elapsed since the last reception of the response signal, Transfer the process to S21.

  In S30, when a predetermined time has elapsed since the first communication unit 23 last received the response signal, the reception unit 265 performs communication of wireless communication with each of the plurality of first communication terminals 1 by the first communication unit 23. It is determined that the state has changed to a communication state indicating that the first communication terminal 1 is separated from the second communication terminal 2 by a predetermined distance or more. Then, the reception unit 265 causes the display unit 22 to display a warning screen for receiving an instruction to start wireless communication with the first communication terminal 1 by the second communication unit 24.

[Process after displaying warning screen]
Subsequently, processing after the warning screen is displayed will be described.
The second reception unit 165 of the first communication terminal 1 determines that the communication state of the wireless communication by the first communication unit 13 indicates that the first communication terminal 1 is separated from the second communication terminal 2 by a predetermined distance or more. When it changes, a warning screen for accepting an instruction to start wireless communication with the second communication terminal 2 by the second communication unit 14 is displayed on the display unit 12 and the start instruction is accepted. In addition, the second reception unit 165 outputs a warning sound from a speaker (not shown) included in the first communication terminal 1 so that the watcher leaves the watch target person carrying the second communication terminal 2 away from himself. Notify that.

  FIG. 9 is a diagram showing an example of the warning screen AL1 displayed on the first communication terminal 1. As shown in FIG. 9, the warning screen AL1 is displayed superimposed on the monitoring screen. A warning button AL1 displays “Telephone”, and a first button for receiving an instruction to start wireless communication with the second communication terminal 2 by the second communication unit 14 and “Stop sound” are displayed. A second button for receiving the output stop of and a third button for displaying an “end” and receiving an instruction to hide the warning screen AL1 are provided.

When the first button is selected, and communication control unit 164 receives an instruction to start wireless communication with second communication terminal 2 by second communication unit 14, communication control unit 164 causes second communication unit 14 to execute a second communication based on the second telephone number. Wireless communication with the communication terminal 2 is performed. Specifically, when the communication control unit 164 receives the start instruction, the communication control unit 164 controls the second communication unit 14 to call the second telephone number stored in the storage unit 15 at the time of pairing. The receiving unit 265 of the second communication terminal 2 causes the display unit 22 to display that the first communication terminal 1 has received a call, in response to the call being received. When the watching target operates the second communication terminal 2 and performs an operation to start a call, the second communication unit 14 of the first communication terminal 1 and the second communication unit 24 of the second communication terminal 2 are wireless Start communication.
Note that the warning screen AL1 may be provided with buttons different from the first to third buttons described above. A button for requesting acquisition of information indicating the current state of the second communication terminal 2 (for example, position information indicating the current position of the second communication terminal 2 or a captured image obtained by imaging the periphery of the second communication terminal 2) May be provided. By doing this, even if the watching target person of the second communication terminal 2 can not respond, the watching person who possesses the first communication terminal 1 can watch the target person based on the information indicating the current state. You can understand the situation of

  Similarly, in the reception unit 265 of the second communication terminal 2, the communication state of the wireless communication by the first communication unit 23 is such that the second communication terminal 2 is separated from each of the plurality of first communication terminals 1 by a predetermined distance or more. When the communication state changes to the second communication unit 24, the display unit 22 displays a warning screen for receiving an instruction to start wireless communication with the first communication terminal 1 by the second communication unit 24, and receives the start instruction. Further, the receiving unit 265 outputs a warning sound from a speaker (not shown) included in the second communication terminal 2 to allow the watching target person to leave the watching person away from the watcher who owns the first communication terminal 1. Notice.

  FIG. 10 is a view showing an example of the warning screen AL2 displayed on the second communication terminal 2. As shown in FIG. As shown in FIG. 10A, the warning screen AL2 displays “Telephone”, and a first button for receiving an instruction to start wireless communication with the first communication terminal 1 by the second communication unit 24, and “ A second button for receiving the stop of the output of the warning sound and a third button for receiving the instruction to turn off the warning screen AL2 are displayed. When the first button is selected on the warning screen AL2, the receiving unit 265 receives the selection of the first communication terminal 1 that performs wireless communication by the second communication unit 24 among the plurality of first communication terminals 1.

  Specifically, when the first button is selected on the warning screen AL2, the receiving unit 265 switches the display of the warning screen AL2, and as shown in FIG. 10B, the plurality of first communication terminals 1 are displayed. A call button indicating the abbreviation (for example, mother, dad) of a watcher who holds each is displayed, and the selection of the first communication terminal 1 to perform wireless communication by the second communication unit 24 is accepted.

  Note that on the second communication terminal 2 side, the warning screen may not display a third button for receiving an instruction to hide the warning screen. By doing this, the second communication terminal 2 does not hide the warning screen, so the watching target selects the first button displayed on the warning screen and starts communication with the watcher. Can increase the possibility of

Moreover, although the reception part 265 displayed warning screen AL2 as shown to FIG. 10B, and received selection of the 1st communication terminal 1 which performs wireless communication by the 2nd communication part 24, it does not restrict to this.
FIG. 11 is a view showing another display example of the warning screen AL2 displayed on the second communication terminal 2. As shown in FIG. As illustrated in FIG. 11A, the reception unit 265 displays a warning screen AL2 for receiving an instruction to start wireless communication by the second communication unit 24 corresponding to each of the plurality of first communication terminals 1, and The selection of the first communication terminal 1 which performs wireless communication by the second communication unit 24 may be accepted via the warning screen AL2. In the warning screen AL2 shown in FIG. 11 (a), instead of displaying the first button on the warning screen AL2 as shown in FIG. 10 (a), “phone to mother” is displayed, and one first communication terminal 1 is displayed. A button for receiving an instruction to start wireless communication with (for example, the first communication terminal 1A), and “Call on Dad” is displayed, and wireless communication with another first communication terminal 1 (for example, the first communication terminal 1B) It can be confirmed that a button for accepting a start instruction of is displayed. By doing this, the watching target person can check the warning screen AL2 and can easily make a phone call with any of a plurality of watchers.

  Further, as shown in FIG. 11B, the reception unit 265 instructs the start of the wireless communication by the second communication unit 24 corresponding to the specific first communication terminal 1 among the plurality of first communication terminals 1. You may make it display warning screen AL2 which receives this. Here, the receiving unit 265 specifies the specific first communication terminal 1 based on a predetermined condition. The predetermined condition is, for example, that there is a high possibility of existing or existing at the closest distance from the second communication terminal 2. In the warning screen AL2 shown in FIG. 11B, “phone to mother” is displayed, and a button for receiving an instruction to start wireless communication with a specific first communication terminal 1 (for example, the first communication terminal 1A) is displayed. It can be confirmed that Note that the receiving unit 265 receives in advance a setting regarding which first communication terminal 1 is to be communicated via the warning screen AL2, and the first communication terminal 1 registered in the setting is subjected to a predetermined condition. It may be specified as a specific first communication terminal to be satisfied. As a result, the watching target can check the warning screen AL2 and can easily make a phone call with the one watching guard set in advance.

  The communication control unit 264 changes the communication state of the wireless communication by the first communication unit 23 to a communication state indicating that the second communication terminal 2 is separated from each of the plurality of first communication terminals 1 by a predetermined distance or more. The second communication unit 24 communicates with at least one of the plurality of first communication terminals 1 based on the first telephone number stored in the storage unit 25. Specifically, when the call control button is selected on the warning screen AL2, the communication control unit 264 selects one first communication terminal 1 and, upon receiving an instruction to start wireless communication, the second communication unit 24. Thus, wireless communication with the first communication terminal 1 is performed based on the first telephone number. When the communication control unit 264 receives the start instruction, the communication control unit 264 controls the second communication unit 24 to select one of the plurality of first telephone numbers stored in the storage unit 25 at the time of pairing with the first communication terminal 1. The first telephone number corresponding to the first communication terminal 1 of the watcher is called.

  The second accepting unit 165 of the first communication terminal 1 causes the display unit 12 to display information indicating that the second communication terminal 2 has received an incoming call, in response to the incoming call. When the watcher operates the first communication terminal 1 and performs an operation to start a call, the second communication unit 24 of the second communication terminal 2 and the second communication unit 14 of the first communication terminal 1 perform wireless communication To start.

  Although the communication control unit 264 performs wireless communication with the selected first communication terminal 1 and the second communication unit 24, the present invention is not limited to this. The communication control unit 264 may perform communication simultaneously with the plurality of first communication terminals 1 using VoLTE (Voice over LTE) so that the watching target person can talk with the plurality of watchers simultaneously. In this way, the watching target and the plurality of watchings can communicate with each other smoothly.

  When the communication state of the wireless communication by the first communication unit 23 changes to a communication state indicating that the second communication terminal 2 is separated from the first communication terminal 1 by a predetermined distance or more, the notification unit 266 transmits the second communication terminal 2. The second communication terminal 2 is notified that the watching target person carrying the call has left the watching person. For example, after the warning screen is displayed, the notification unit 266 displays that the watching target has separated from the watching person in response to the fact that the warning screen is not operated for a predetermined time (for example, one minute). A notification screen showing information indicating the information and information indicating the identity of the watching target is displayed on the display unit 22 and a warning sound is output from the speaker, and the second watching communication terminal indicates that the watching target is separated from the watching person Notify around 2 By doing this, it is possible to make the third party notice that the watching target has left the watching person and to increase the possibility of taking appropriate action on the third party.

  The first communication terminal 1 and the second communication terminal 2 are warned at the same timing by displaying the warning screen based on the signal that the first communication terminal 1 and the second communication terminal 2 mutually transmit and receive. There is a high possibility of displaying the screen. In this case, the watching person and watching target person become talking by giving an instruction to start wireless communication by the second communication unit at the same timing on the warning screen, and the watching person and watching target person can not communicate. There is a fear.

  Therefore, display timings of warning screens in the first communication terminal 1 and the second communication terminal 2 may be different from each other. For example, in the first communication terminal 1, a warning screen is displayed in response to the passage of a first time (for example, 10 seconds) since the first communication unit 13 last received a beacon signal, and the second communication terminal 2 In the above, the warning screen may be displayed in response to the elapse of a second time (for example, 20 seconds) since the first communication unit 23 last received the response signal. In addition, the first communication terminal 1 and the second communication terminal 2 have different times until it becomes possible to select the first button for accepting the start instruction of the wireless communication by the second communication unit displayed on the warning screen. You may control.

  Moreover, when each of the plurality of first communication terminals 1 and the second communication terminal 2 are separated, there is a high possibility that the warning screen is displayed on the plurality of first communication terminals 1 at the same timing. In this case, when a plurality of watchers call the watch target person simultaneously, communication between the plurality of watch target people and the watchers may be complicated. Therefore, the second reception unit 165 of each of the plurality of first communication terminals 1 may display the warning screen at different timings. For example, the second reception unit 165 of the first communication terminal 1A displays a warning screen in response to the passage of a third time (for example, 10 seconds) since the first communication unit 13 last received the beacon signal. The second accepting unit 165 of the first communication terminal 1B displays a warning screen in response to the passage of a fourth time (for example, 30 seconds) since the first communication unit 13 last received the beacon signal. It is also good.

  In this case, when the second communication unit 14 performs wireless communication with the second communication terminal 2 in each of the notification units 166 of the plurality of first communication terminals 1, the notification unit 166 determines itself to the first communication terminal 1 different from itself. And information indicating that the second communication terminal 2 has communicated may be notified. For example, as the notification unit 166 of each of the plurality of first communication terminals 1 indicates that the watcher possessing himself / herself has talked with the watching target person possessing the second communication terminal 2 You may be notified that you are calling. Then, the notification unit 166 of the first communication terminal 1 that has received the information may display the information on its own display unit. Moreover, the 2nd reception part 165 of the 1st communication terminal 1 which received the said information may hide the said warning screen, when the warning screen is displayed when the said information is received.

  In addition, when the watching target person acts with one watching target, when another watching person leaves the watching target person, a warning screen is displayed on the first communication terminal 1 possessed by the other watching person. It will Therefore, even if the communication control unit 164 of each of the plurality of first communication terminals 1 transmits / receives information indicating whether or not the second communication unit 24 receives the beacon ID of the person being watched over by itself. Good. Then, the communication control unit 164 does not display the warning screen when the other first communication terminal 1 receives the response signal, even when the predetermined time has elapsed since the last reception of the response signal. You may do so. By doing this, it is possible to prevent a warning screen from being displayed on the first communication terminal 1 of another watcher when the watch target person acts with one watcher.

  In addition, the first communication terminal 1 warns when the communication state of the wireless communication by the first communication unit 13 changes to a communication state indicating that the first communication terminal 1 is separated from the second communication terminal 2 by a predetermined distance or more. Although the screen is displayed on the display unit 12 and an instruction to start wireless communication with the second communication terminal 2 by the second communication unit 14 is received on the warning screen, the present invention is not limited thereto. For example, the first communication terminal 1 automatically performs wireless communication with the second communication terminal 2 by the second communication unit 14 without receiving an instruction to start wireless communication with the second communication terminal 2 by the second communication unit 14. Communication may be started.

[Display of information showing the status of watching target]
In the first communication terminal 1 and the second communication terminal 2, it indicates that the communication status of the wireless communication by the first communication unit is separated from the communication partner (the second communication terminal 2 or the first communication terminal 1) by a predetermined distance or more When the communication status changes, the watching person who holds the first communication terminal 1 may be notified of status information indicating the status of the watching target.

  For example, the acquisition unit 262 of the second communication terminal 2 may use the communication condition indicating that the communication condition of the wireless communication by the first communication unit 23 indicates that the second communication terminal 2 is separated from the first communication terminal 1 by a predetermined distance or more. If it changes, the information which shows the movement aspect of the watching object person who possesses the 2nd communication terminal 2 will be acquired based on the acceleration information outputted from the acceleration sensor (not shown) with which the 2nd communication terminal 2 is provided. For example, the information indicating the movement mode includes information indicating movement by walk, car or train, and information on movement speed such as whether it is moving slowly or moving quickly. The communication control unit 264 transmits information indicating the movement mode of the watching target person to the first communication terminal 1 via the second communication unit 24 as situation information indicating the situation of the watching target person.

  The communication control unit 164 of the first communication terminal 1 changes the communication status of the wireless communication by the first communication unit 13 to a communication status indicating that the first communication terminal 1 is separated from the second communication terminal 2 by a predetermined distance or more. Then, the second communication unit 14 receives, from the second communication terminal 2, information indicating the movement mode of the watching target person as situation information indicating the situation of the watching target person. The notification unit 166 causes the display unit 12 to display the received information indicating the movement mode of the watching target, or causes the speaker to output the sound indicating the movement mode from the speaker, whereby the watcher who possesses the first communication terminal 1 Notify By doing this, the watching person can grasp the movement mode of the watching target person and grasp what kind of situation the watching target person is in.

In addition, although the 2nd communication terminal 2 transmitted the information which shows the movement aspect of a watching object to the 1st communication terminal 1 as situation information which shows the situation of watching person, it is not restricted to this. For example, the second communication terminal 2 may acquire position information indicating its own position, and may monitor the position information and transmit it to the first communication terminal 1 as status information indicating the status of the target person. In addition, the second communication terminal 2 causes the imaging unit (not shown) provided in itself to capture an image of the surroundings and generates image data, and monitors the image data to obtain information on the condition of the target person. 1 It may be transmitted to the communication terminal 1.
Further, the notification unit 166 of the first communication terminal 1 determines whether the second communication terminal 2 is separated from the first communication terminal 1 based on the position information received from the second communication terminal 2 and the position information of itself. It may be determined. Then, the notification unit 166 may notify, as status information indicating the status of the watching target, whether the second communication terminal 2 (watching target) is approaching or away from itself.

  In addition, position information indicating information indicating the position of the first communication terminal 1 or image data generated by imaging the surroundings of the first communication terminal 1 to the second communication terminal 2 as information indicating the status of the watcher It may be sent. Then, when the notification unit 266 of the second communication terminal 2 receives the information indicating the status of the watcher, the notification unit 266 causes the display unit 22 to display the information or causes the speaker to output a voice indicating the information. By doing this, the watching target may be notified.

[Processing when communication by the first communication unit is restored to the communicable state]
When the communication status of the wireless communication by the first communication unit in the first communication terminal 1 and the second communication terminal 2 changes to a communication status indicating that the communication partner is away from the communication partner by a predetermined distance or more, the first communication terminal 1 The second communication terminal 2 may continue to determine whether communication by the first communication unit is possible.

  For example, the communication control unit 164 of the first communication terminal 1 indicates that the communication condition of the wireless communication by the first communication unit 13 indicates that the first communication terminal 1 is separated from the second communication terminal 2 by a predetermined distance or more. It is determined whether the first communication unit 13 has received a beacon signal even after changing to. The notification unit 166 of the first communication terminal 1 changes the communication state of the wireless communication by the first communication unit 13 to a communication state indicating that the first communication terminal 1 is separated from the second communication terminal 2 by a predetermined distance or more. After that, when it changes to a state in which wireless communication with the second communication terminal 2 can be performed, that is, a communication state indicating that the second communication terminal 2 is not separated by a predetermined distance or more, the second communication terminal 2 with the first communication unit 13 Inform the watchers that they can communicate wirelessly. Note that instead of notifying that the first communication unit 13 can perform wireless communication with the second communication terminal 2, the notification unit 166 of the first communication terminal 1 wirelessly communicates with the second communication terminal 2 by the first communication unit 13. It may be notified to the watcher that the communication can be changed or the distance between the first communication terminal 1 and the second communication terminal 2 has been changed within a predetermined distance.

  Similarly, in the notification unit 266 of the second communication terminal 2, the communication status of the wireless communication by the first communication unit 23 is that the second communication terminal 2 is separated from each of the plurality of first communication terminals 1 by a predetermined distance or more. The wireless communication with the first communication terminal 1 by the first communication unit 23 when it changes to the communication state indicating that the communication state does not separate from at least one of the plurality of first communication terminals 1 by a predetermined distance or more after changing to the communication state indicating Watch what you can do and notify the target person. By doing this, the watcher can grasp that the watcher is approaching himself, and the watcher can also grasp that the watcher is approaching himself.

[Effect in the present embodiment]
As described above, the second communication terminal 2 according to the present embodiment is a terminal identification information that identifies the plurality of first communication terminals 1 designated as targets to monitor the communication status of the wireless communication by the first communication unit 23. Is stored in the storage unit 25 and the communication status of wireless communication with each of the plurality of first communication terminals 1 by the first communication unit 23 is such that the second communication terminal 2 is separated from the first communication terminal 1 by a predetermined distance or more. When the communication state changes to that, the second communication unit 24 performs wireless communication with at least one of the plurality of first communication terminals 1 based on the terminal identification information of the first communication terminal 1.

  By doing this, the watching target person carrying the second communication terminal 2 is watched via the second communication unit 24 when any of the plurality of watching people carrying the first communication terminal 1 is separated. Can communicate with Therefore, the 2nd communication terminal 2 can make a surveillance object person correspond appropriately, when a surveillance object person leaves any of a plurality of surveillance persons.

  Also, when the second communication terminal 2 receives an instruction to monitor the communication status of the wireless communication with the first communication terminal 1 by the first communication unit 23, the second communication terminal 2 receives the first communication terminal from each of the plurality of first communication terminals 1. The first telephone number identifying 1 is acquired, and the first telephone number is stored in the storage unit 25. By doing this, for example, even if the SIM card attached to the first communication terminal 1 is changed, and the first telephone number may change, the second communication terminal 2 can (1) Since the telephone number is acquired, when the watcher leaves, communication can be reliably performed with the first communication terminal 1 using the first telephone number.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. For example, in the above embodiment, when the first communication terminal 1 and the second communication terminal 2 perform wireless communication by the second communication unit, the telephone number is used as the terminal identification information. Not limited to. For example, the terminal identification information may be a mail address or a messenger user ID. Then, in the first communication terminal 1 and the second communication terminal 2, the communication status of the wireless communication by the first communication unit is separated from the communication partner (the second communication terminal 2 or the first communication terminal 1) by a predetermined distance or more. When the communication state changes to the second communication unit, the second communication unit may perform wireless communication with the communication partner based on SMS (Short Message Service), an e-mail address, or a user ID of a messenger. For example, a warning screen for receiving an instruction to start wireless communication with the second communication terminal 2 by the second communication unit 14 may display a button for receiving an SMS message, an e-mail message, or a messenger application message.

Moreover, in the above-mentioned embodiment, although the 1st communication terminal 1 and the 2nd communication terminal 2 acquired and memorize | stored the telephone number of the communicating party at the time of pairing, after storing the communicating party's telephone number once, At the time of pairing, the telephone number of the communication partner may not be acquired. In addition, the first communication terminal 1 may receive the specification of the second communication terminal 2 as a target to monitor the communication status of the wireless communication by the first communication unit 13 in advance. In this case, the first communication terminal 1 may acquire the second telephone number identifying the second communication terminal 2 and store the second telephone number in the storage unit 15 at the timing when the designation is received.
In the above-described embodiment, each of the plurality of first communication terminals 1 corresponds to the storage unit 15, the first reception unit 161, the acquisition unit 162, the storage control unit 163, the communication control unit 164, the second reception unit 165, and Although the notification unit 166 is provided, the present invention is not limited to this. For example, at least one of the plurality of first communication terminals 1 may have these configurations.

  Further, it is apparent to those skilled in the art that various changes or modifications can be added to the above-described embodiment. In particular, the specific embodiment of the distribution and integration of the devices is not limited to the one illustrated above, and all or part of the specific embodiments according to various additions or the like or according to the functional load, in arbitrary units. It can be configured to be distributed or integrated functionally or physically.

1 ... first communication terminal, 11 ... input unit, 12 ... display unit, 13 ... first communication unit, 14 ... second communication unit, 15 ... storage unit, 16 · · Control unit, 161 · · · first reception unit, 162 · · · acquisition unit, 163 · · · storage control unit, 164 · · · communication control unit, 165 · · · second reception unit, 166 · · · Notification unit, 2 ... second communication terminal, 21 ... input unit, 22 ... display unit, 23 ... first communication unit, 24 ... second communication unit, 25 ... storage unit , 26: control unit, 262: acquisition unit, 263: storage control unit, 264: communication control unit, 265: reception unit, 266: notification unit, S: communication system

Claims (10)

A communication terminal that performs wireless communication with another terminal,
A first communication unit for performing wireless communication for specifying the separation degree between the other terminal and the communication terminal,
A second communication unit that performs wireless communication in a method different from the first communication unit;
A storage unit storing terminal identification information identifying each of the plurality of other terminals designated as targets to be monitored for the communication status of wireless communication by the first communication unit;
When the communication status of the wireless communication by the first communication unit changes to a communication status indicating that the communication terminal is separated from each of the plurality of other terminals by a predetermined distance or more, the second one of the plurality of other terminals [2] a receiving unit that receives selection of another terminal that performs wireless communication by the communication unit;
A communication control unit that performs wireless communication with the other terminal whose selection has been received by the reception unit and the second communication unit based on the terminal identification information stored in the storage unit ;
A communication terminal comprising   The receiving unit may change the communication status of the wireless communication by the first communication unit to a communication status indicating that the communication terminal is separated from each of the plurality of other terminals by a predetermined distance or more, the plurality of other terminals To display a screen for receiving an instruction to start wireless communication by the second communication unit, and to receive, through the screen, a selection of another terminal performing wireless communication by the second communication unit,
  The communication terminal according to claim 1.   The receiving unit may change the communication status of the wireless communication by the first communication unit to a communication status indicating that the communication terminal is separated from each of the plurality of other terminals by a predetermined distance or more, the plurality of other terminals Displaying a screen for receiving an instruction to start wireless communication by the second communication unit, corresponding to a specific other terminal of
  The communication control unit performs wireless communication with one other terminal by the second communication unit.
  The communication terminal according to claim 1.   The reception unit identifies the specified other terminal based on a predetermined condition, and displays a screen for receiving an instruction to start wireless communication by the specified other terminal and the second communication unit.
  The communication terminal according to claim 3.   A communication terminal that performs wireless communication with another terminal,
  A first communication unit that performs wireless communication to specify the degree of separation between the communication terminal and the other terminal;
  A second communication unit that performs wireless communication in a method different from the first communication unit;
  A storage unit storing terminal identification information identifying each of the plurality of other terminals designated as targets to be monitored for the communication status of wireless communication by the first communication unit;
  An acquisition unit configured to acquire the terminal identification information from each of the plurality of other terminals when an instruction to monitor the communication status of wireless communication with the plurality of other terminals by the first communication unit is received;
  A storage control unit for storing the plurality of acquired terminal identification information in the storage unit;
  When the communication status of the wireless communication by the first communication unit changes to a communication status indicating that the communication terminal is separated from each of the plurality of other terminals by a predetermined distance or more, the storage unit is operated by the second communication unit. A communication control unit that performs wireless communication with at least one of the plurality of other terminals based on the terminal identification information stored in
  A communication terminal comprising   When the communication status of the wireless communication by the first communication unit changes to a communication status indicating that the communication terminal is separated from each of the plurality of other terminals by a predetermined distance or more, the plurality of the other communication terminals by the second communication unit The display unit further includes a reception unit that displays a screen for receiving a start instruction of wireless communication with the terminal on the display unit, and receives the start instruction.
  When the communication control unit receives the start instruction, the second communication unit performs wireless communication with at least one of the plurality of other terminals based on the terminal identification information.
  The communication terminal according to any one of claims 1 to 5. A communication system comprising a plurality of first communication terminals and a second communication terminal, the communication system comprising:
The plurality of first communication terminals and the second communication terminal include:
A first communication unit that performs wireless communication to specify the degree of separation between itself and another terminal;
And a second communication unit that performs wireless communication in a method different from the first communication unit.
Each of the plurality of first communication terminals is
A storage unit that stores terminal identification information that identifies the second communication terminal designated as a target for monitoring the communication status of wireless communication by the first communication unit;
When the communication status of wireless communication by the first communication unit changes to a communication status indicating that the first communication unit is separated from the second communication terminal by a predetermined distance or more, the wireless communication with the second communication terminal by the second communication unit is performed. A display unit configured to display a screen for receiving a start instruction of communication on the display unit at different timings in each of the plurality of first communication terminals, and a reception unit for receiving the start instruction;
A communication control unit for performing wireless communication with the second communication terminal based on the terminal identification information by the second communication unit when the start instruction is received;
The second communication terminal is
A storage unit that stores terminal identification information that identifies each of the plurality of first communication terminals designated as targets to monitor the communication status of wireless communication by the first communication unit;
When the communication status of the wireless communication by the first communication unit changes to a communication status indicating that the second communication terminal is separated from each of the plurality of first communication terminals by a predetermined distance or more, the second communication unit A communication control unit configured to perform wireless communication with at least one of the plurality of first communication terminals based on the terminal identification information;
Communications system.   Each of the plurality of first communication terminals is
  When wireless communication with the second communication terminal is performed by the second communication unit, the notification unit further notifies the first communication terminal different from itself of information indicating that the first communication terminal has communicated with the second communication terminal. Prepare,
  The communication system according to claim 7. It is executed by a computer including a first communication unit that performs wireless communication for specifying the degree of separation between itself and another terminal, and a second communication unit that performs wireless communication by a method different from the first communication unit.
Storing, in a storage unit, terminal identification information identifying each of the plurality of other terminals designated as targets to monitor the communication status of wireless communication by the first communication unit;
When the communication status of the wireless communication by the first communication unit changes to a communication status indicating that the computer is separated from each of the plurality of other terminals by a predetermined distance or more, the second of the plurality of other terminals is selected. Accepting the selection of another terminal performing wireless communication by the communication unit;
Performing wireless communication with the other terminal whose selection has been accepted based on the terminal identification information stored in the storage unit and the second communication unit ;
A communication method comprising:   It is executed by a computer including a first communication unit that performs wireless communication for specifying the degree of separation between itself and another terminal, and a second communication unit that performs wireless communication by a method different from the first communication unit.
  When an instruction to monitor the communication status of wireless communication with a plurality of other terminals by the first communication unit is received, terminal identification information for identifying each of the plurality of other terminals is acquired from each of the plurality of other terminals. Step to
  Storing the plurality of acquired terminal identification information in a storage unit;
  When the communication status of the wireless communication by the first communication unit changes to a communication status indicating that the computer is separated from each of the plurality of other terminals by a predetermined distance or more, the second communication unit causes the storage unit to Wirelessly communicating with at least one of the plurality of other terminals based on the stored terminal identification information;
  A communication method comprising: