JP2012044450A - Communication system, communication terminal, communication method, and communication program - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication system that enables a supervisor to rapidly grasp a position of a supervised person when there is a possibility of the person may have lost his/her way.SOLUTION: The communication system includes: a first communication terminal having a first communication section, a position information acquisition section and a transmission section; and a second communication terminal having a second communication section communicable in an area within a predetermined distance from the first communication section, and a reception section. If a communication state between the first communication section and the second communication section does not satisfy a predetermined condition, the position information acquisition section acquires position information of the first information terminal; the transmission section transmits position information; and the reception section receives the position information.

Description

  The present invention relates to a communication system, a communication terminal, a communication method, and a communication program that notify position information.

  In recent years, a portable terminal owned by a supervisor (for example, a parent) may be able to acquire position information of the portable terminal of a supervised person (for example, a child) by a positioning function using GPS (Global Positioning System) or cell information. .

  Such a positioning function is used when the supervisor wants to know where the supervisor is. However, if the supervisor is lost from the supervisor, the supervisor himself / herself needs to acquire position information after realizing that the supervisor has been lost. As a result, there arises a problem that discovery of the supervisor is delayed.

  In addition, a system has been proposed in which a supervisor is notified when a supervised person leaves a predetermined route such as a school route. However, it is necessary to set a route in advance, and it is not possible to deal with lost children in areas where the route is not set.

  For example, Patent Literature 1 and Patent Literature 2 describe a technique for automatically notifying information related to a supervisor without setting a route.

  In Patent Literature 1, when the supervisor's terminal deviates from the Bluetooth (registered trademark) piconet of the supervisor's terminal, the supervisor's terminal is notified that the supervisor has been lost.

  In Patent Document 2, when a terminal owned by a supervisor becomes low in battery power or moves from outside the communication area to within the communication area, the position information of the terminal is notified to the supervisor's terminal.

JP 2003-233877 A JP 2007-251439 A

  However, in Patent Document 1, although it is notified that the supervisor is lost, it is unclear where the supervisor is lost. Therefore, it takes time to search for lost children.

  Also in Patent Document 2, even if the terminal of the supervisor is separated from the terminal of the supervisor by a predetermined distance, the supervisor cannot know the position information of the supervisor.

  In view of such a problem, the present invention provides a communication system, a communication terminal, and a communication that enable a supervisor to quickly grasp the position of the supervisor when the supervisor may be lost. It is an object to provide a method and a communication program.

  The communication system according to the present invention includes a first communication terminal having a first communication unit, a position information acquisition unit, and a transmission unit, and a first communication unit capable of communicating with the first communication unit within a predetermined distance. A second communication terminal having a second communication unit and a receiving unit, and when the communication state between the first communication unit and the second communication unit no longer satisfies a predetermined condition, position information is acquired. The unit acquires position information of the first communication terminal, the transmission unit transmits the position information, and the reception unit receives the position information.

  A communication terminal of the present invention includes a communication unit capable of communicating with a partner communication terminal within a predetermined distance from the communication terminal, a communication monitoring unit that monitors a communication state between the partner communication terminal and the communication unit, and a partner communication terminal A location information requesting unit that transmits a location information acquisition instruction to the mobile station, and a receiving unit that receives location information of the partner communication terminal. The communication monitoring unit determines whether the communication state between the communication unit and the partner communication terminal is a predetermined value. When it is determined that the condition is no longer satisfied, the position information request unit transmits a position information acquisition instruction to the partner communication terminal.

  The communication terminal of the present invention includes a communication unit capable of communicating with a partner communication terminal within a predetermined distance from the communication terminal, a communication monitoring unit for monitoring a communication state between the partner communication terminal and the communication unit, and a communication terminal A position information acquisition unit that acquires position information; and a transmission unit that transmits the acquired position information. The communication monitoring unit determines that the communication state between the communication unit and the partner communication terminal no longer satisfies a predetermined condition. In this case, the position information acquisition unit acquires position information.

  The communication method of the present invention includes a communication step of communicating with a communication terminal within a predetermined distance from the communication terminal, a communication monitoring step of monitoring a communication state in the communication step, and acquisition of position information for the communication terminal A position information requesting step for transmitting an instruction and a receiving step for receiving the position information of the partner communication terminal, and in the communication monitoring step, if it is determined that the communication state in the communication step no longer satisfies the predetermined condition, In the information request process, a position information acquisition instruction is transmitted to the partner communication terminal.

  The communication method of the present invention includes a communication step of communicating with a communication terminal and a partner communication terminal within a predetermined distance, a communication monitoring step of monitoring a communication state in the communication step, and a position for acquiring position information of the communication terminal An information acquisition step, and a transmission step for transmitting the acquired position information. When it is determined in the communication monitoring step that the communication state in the communication step no longer satisfies the predetermined condition, the position information acquisition step To get.

  The communication program of the present invention includes a communication process for communicating with a communication terminal within a predetermined distance range from the communication terminal, a communication monitoring process for monitoring a communication state in the communication process, and obtaining position information for the communication terminal. In the communication monitoring step, it is determined that the communication state in the communication step no longer satisfies the predetermined condition, by causing the communication terminal to execute a position information requesting step for transmitting an instruction and a receiving step for receiving the position information of the counterpart communication terminal. In the case of the location information requesting step, a location information acquisition instruction is transmitted to the counterpart communication terminal.

  The communication program of the present invention includes a communication step for communicating with a communication terminal and a counterpart communication terminal within a predetermined distance, a communication monitoring step for monitoring a communication state in the communication step, and a position for acquiring position information of the communication terminal. When the communication terminal executes the information acquisition step and the transmission step for transmitting the acquired position information, and the communication monitoring step determines that the communication state in the communication step no longer satisfies the predetermined condition, the position information acquisition step To obtain position information.

  In the communication terminal according to the present invention, the supervisor can grasp the position of the supervisor when the supervisor is lost or likely to get lost.

An example of the communication system in the 1st Embodiment of this invention is shown. An example of the communication system in the 2nd Embodiment of this invention is shown. It shows about the communicable range of the communication terminal in the 2nd Embodiment of this invention. The other example of the structure of the communication terminal for supervisors in the 2nd Embodiment of this invention is shown. The other example of the structure of the communication terminal for supervisors in the 2nd Embodiment of this invention is shown. An example of the communication system in the 3rd Embodiment of this invention is shown. An example of the structure of the communication terminal for supervisors in the 3rd Embodiment of this invention is shown.

  Embodiments of the present invention will be described with reference to the drawings. However, such a form does not limit the technical scope of the present invention.

[First Embodiment]
The configuration of the communication system in the first embodiment of the present invention will be described with reference to FIG.

  The communication system in the present embodiment includes a first communication terminal 10 and a second communication terminal 20. The first communication terminal 10 includes a first communication unit 11, a position information acquisition unit 12, and a transmission unit 13. The second communication terminal 20 includes a second communication unit 21 and a receiving unit 22.

  In addition, let the user of the 1st communication terminal 10 in this embodiment be a supervisor. Moreover, the user of the 2nd communication terminal 20 in this embodiment is taken as the supervisor of the user of the 1st communication terminal 10, for example.

  The first communication unit 11 and the second communication unit 21 can communicate with each other when they are within a predetermined distance.

  Further, when the communication state between the first communication unit 11 and the second communication unit 21 does not satisfy a predetermined condition, the position information acquisition unit 12 acquires the position information of the first communication terminal 10. The predetermined condition of the communication state may be, for example, that communication is possible. In this case, when communication becomes impossible, the communication state does not satisfy a predetermined condition. Or you may add that the communication speed is more than a fixed value etc. to the predetermined conditions of a communication state. In this case, even if communication is possible, the communication state does not satisfy the predetermined condition if the communication speed is equal to or less than a certain value.

  Whether or not the communication state between the communication unit 11 and the communication unit 21 satisfies a predetermined condition may be determined by the first communication terminal 10 as described in the second embodiment. Alternatively, it may be determined by the second communication terminal 20 as described in the third embodiment.

  The transmission unit 13 of the first communication terminal 10 transmits the position information acquired by the position information acquisition unit 12 to the second communication terminal 20. Then, the receiving unit 22 of the second communication terminal 20 receives the position information transmitted by the transmitting unit 13. In addition, transmission / reception of the positional information by the transmission part 13 and the receiving part 14 is performed via a base station.

  Thereby, the second communication terminal 20 can acquire the position information of the first communication terminal 10.

  As described above, in the present embodiment, when the communication state between the first communication unit 11 and the second communication unit 21 does not satisfy the predetermined condition, the user of the second communication terminal 20 The position information of the communication terminal 10 can be known.

  Therefore, the supervisor who is the user of the second communication terminal quickly grasps the position of the supervisor when the supervisor who is the user of the first communication terminal may be lost. be able to.

  In addition, it is good also as a structure which the control part with which the 1st communication terminal 10 in this embodiment is further equipped controls each component of the 1st communication terminal 10 via a bus | bath. Similarly, the control unit further provided in the second communication terminal 20 may be configured to control each component of the second communication terminal 20 via a bus.

  As described above, the configuration in which the control unit may control each component of the communication terminal is the same in all embodiments described later.

[Second Embodiment]
Next, a communication system according to the second embodiment of the present invention will be described with reference to FIG.

  The communication system in the present embodiment includes a supervisor communication terminal 30 owned by a supervisor such as a child and a supervisor communication terminal 40 used by the supervisor. The supervisor communication terminal 30 includes a communication unit 31, a position information acquisition unit 32, and a transmission unit 33.

  The supervisor communication terminal 40 includes a communication unit 41, a communication monitoring unit 42, a position information request unit 43, and a reception unit 44.

  The communication unit 31 and the communication unit 41 can communicate with each other when they are within a predetermined distance. The communication unit 31 and the communication unit 41 are communication units used for a short-range communication method such as Bluetooth (registered trademark), for example. In this case, the supervisor communication terminal 30 and the supervisor communication terminal 40 perform authentication work for connecting the communication between the communication unit 31 and the communication unit 41, respectively. Therefore, each of the supervisor communication terminal 30 and the supervisor communication terminal 40 includes a recording unit that stores authentication information for performing an authentication operation.

  In the present embodiment, a range in which the supervisor communication terminal 40 can communicate via the communication unit 41 is a communicable range A shown in FIG.

  When the supervisor communication terminal 30 is within the communicable range A of the supervisor communication terminal 40, the communication unit 31 and the communication unit 41 can communicate with each other. That is, the communication unit 31 of the supervisory communication terminal 30 before movement shown in FIG. 3 can communicate with the communication unit 41, but the communication unit 31 of the supervisory communication terminal 30 after movement is the communication unit. 41 cannot be communicated. In the present embodiment, the communicable range A is within a radius of 10 m from the supervisor communication terminal 40.

  The communication monitoring unit 42 monitors the communication state between the communication unit 31 and the communication unit 41 and determines whether the communication state satisfies a predetermined condition. The predetermined condition of the communication state in this embodiment is assumed to be communicable. That is, if the communication unit 31 and the communication unit 41 are in a communicable state, the communication monitoring unit 42 determines that a predetermined condition is satisfied.

  The position information requesting unit 43 requests position information of the supervisory communication terminal 30 from the supervisory communication terminal 30.

  Next, the operation of the communication system in this embodiment will be described.

  First, it is assumed that the communication unit 31 and the communication unit 41 are in a communicable state. That is, it is assumed that the supervisor communication terminal 30 is within the communicable range A of the supervisor communication terminal 40.

  In this case, the communication monitoring unit 42 determines that the communication state between the communication unit 31 and the communication unit 41 satisfies a predetermined condition.

  Next, a case where the communication unit 31 and the communication unit 41 are unable to communicate will be described.

  When the supervisor is separated from the supervisor by a predetermined distance or more and the supervisor communication terminal 30 is located outside the communicable range A of the supervisor communication terminal 40, the communication unit 31 and the communication unit 41 communicate with each other. It becomes impossible.

  In this case, the communication monitoring unit 42 of the supervisor communication terminal 40 determines that the communication state between the communication unit 31 and the communication unit 41 does not satisfy a predetermined condition.

  When the communication monitoring unit 42 determines that the communication state between the communication unit 31 and the communication unit 41 does not satisfy the predetermined condition, the position information request unit 43 requests the position information of the supervisory communication terminal 30. Specifically, the location information required section 43 transmits a location information acquisition instruction to the supervisor communication terminal 30. The transmission of the position information acquisition instruction is performed by, for example, transmitting an e-mail requesting position information to the supervisory communication terminal 30 via the base station.

  The supervisor communication terminal 30 receives the position information acquisition instruction from the supervisor communication terminal 40. The position information acquisition instruction is received, for example, by receiving an e-mail requesting position information. When the supervisory communication terminal 30 receives the position information acquisition instruction, the positional information acquisition unit 32 acquires the positional information of the supervisory communication terminal 30.

  The position information acquisition unit 32 is configured to acquire position information using a satellite such as GPS, for example. In this case, the position information acquisition unit 30 measures the time until a radio wave emitted from a GPS satellite (not shown) reaches the supervisor communication terminal 30, and from this time difference, the GPS satellite and the supervisor communication terminal 30. And the distance is calculated. And position information is acquired by calculating | requiring a position coordinate using the calculated distance. Or the positional information acquisition part 32 is good also as acquiring the positional information on the cell in which the communication terminal 30 for supervisors is located. Then, the position information of the cell may be used as the position information of the supervisor communication terminal 30.

  The transmission unit 33 transmits the position information acquired by the position information acquisition unit 32 to the supervisor communication terminal 40. More specifically, for example, the acquired position information may be sent back by e-mail to the source address of the e-mail requesting position information.

  Then, the receiving unit 44 of the supervisor communication terminal 40 receives the position information of the supervisor communication terminal 30. Thereby, the supervisor who uses the communication terminal 40 for supervisor can grasp | ascertain the position of a to-be-supervised person.

  As described above, in the present embodiment, when the communication unit 31 and the communication unit 41 cannot communicate with each other, the position information of the supervisor communication terminal 30 is transmitted to the supervisor communication terminal 40. This allows the supervisor to know where the supervised person is. Therefore, even if the route is not set in advance, the supervisor can quickly grasp the position of the supervisor if there is a possibility that the supervisor is lost. Thereby, the supervisor can discover the supervised person at an early stage.

  As a modification of the present embodiment, a notification unit 45 may be provided in the supervisor communication terminal 40 as shown in FIG. When the communication monitoring unit 42 determines that the communication state between the communication unit 31 and the communication unit 41 does not satisfy a predetermined condition, the notification unit 45 generates a notification.

  The notification method by the notification unit 45 is such that the supervisor who is the user of the supervisor communication terminal 40 does not satisfy the predetermined condition in the communication state between the communication unit 31 and the communication unit 41, that is, the supervisor Any method can be used as long as it can recognize that there is a possibility of getting lost. For example, the notification unit 45 may notify by generating voice or music. Or it is good also as notifying by generating light or vibration. Furthermore, it is good also as notifying by displaying a predetermined message on the display part of the communication terminal 40 for supervisors. The predetermined message includes, for example, “the supervisor may have been lost”.

  Moreover, the notification part 45 is good also as displaying the information of the communicable distance of the communication part 31 and the communication part 41, for example, the radius of the communicable range A of the communication terminal 40 for supervisors. Thereby, the supervisor can grasp how far the supervisor is away from the supervisor. In the present embodiment, the communicable range A has a radius of 10 m. Therefore, the notification unit 45 may display that “the supervisor is about 10 m or more away”.

  As described above, when the communication unit 31 and the communication unit 41 are unable to communicate with each other, the notification unit 45 of the supervisor communication terminal 40 generates a notification. As a result, the supervisor can know that the supervised person is more than a predetermined distance away from him. Therefore, the supervisor can quickly recognize that the supervised person may have been lost.

  In addition, when the supervisor communication terminal 30 and the supervisor communication terminal 40 are in an environment in which communication is not possible via the base station, the supervisor communication terminal 40 cannot transmit / receive position information. However, when the notification unit 45 generates a notification, the supervisor can know that the supervisor communication terminal 30 is out of the communicable range A of the supervisor communication terminal 40.

  In the present embodiment, it is assumed that communication is possible under a predetermined condition of the communication state, but the present invention is not limited to this. That is, the predetermined condition of the communication state may be added on the condition that the communication speed is a certain level or more. For example, even if the communication unit 31 and the communication unit 41 are communicable, the communication speed may be extremely reduced due to an obstacle such as a building between the communication unit 31 and the communication unit 41. is there. In such a case, the communication monitoring unit 42 may set the predetermined condition so as to determine that the communication state between the communication unit 31 and the communication unit 41 does not satisfy the predetermined condition.

  Furthermore, the supervisor communication terminal 30 and the supervisor communication terminal 40 of the present embodiment further include a broadcast receiving unit, a camera unit, a transmitting unit, a receiving unit, an audio processing unit, a video processing unit, an operation unit, and the like, respectively. It is good also to prepare.

  An example of the configuration of the supervisor communication terminal 40 in this case is shown in FIG.

  The broadcast receiving unit 46 receives a broadcast signal transmitted from a broadcast station such as a ground station or a satellite via an antenna, and performs broadcast signal processing such as video data, audio data, and information data by demodulation of the received signal. .

  As described above, the recording unit 47 records authentication information necessary for communication between the communication unit 31 and the communication unit 41.

  The camera unit 48 acquires (shoots) image information. The transmitter 49 and the receiver 50 are a microphone and a speaker for making a call between communication terminals, for example. The voice processing unit 51 processes a voice signal input / output via the transmitting unit and the receiving unit. The video processing unit 52 performs information display output processing for images, graphics, characters, symbols, and the like. The operation unit 53 includes a numeric keypad, a direction key, a determination key, and the like, and is used when the user inputs various information to the communication terminal. The control unit 54 controls each component included in the supervisor communication terminal 40 via the bus 55.

[Third Embodiment]
Next, the communication system in the 3rd Embodiment of this invention is demonstrated using FIG.

  The communication system in the present embodiment includes a supervisor communication terminal 60 owned by a supervisor and a supervisor communication terminal 70 used by the supervisor.

  The supervisor communication terminal 60 includes a communication unit 61, a communication monitoring unit 62, a position information acquisition unit 63, a transmission unit 64, and a recording unit 65.

  The supervisor communication terminal 70 includes a communication unit 71 and a reception unit 72.

  The communication unit 61 and the communication unit 71 can communicate with each other when they are within a predetermined distance. The communication unit 61 and the communication unit 71 are communication units used for a short-range communication method such as Bluetooth (registered trademark), for example. In the present embodiment, as in the second embodiment, a range in which the supervisor communication terminal 70 can communicate via the communication unit 71 is referred to as a communicable range A. That is, when the supervisor communication terminal 60 is within the communicable range A of the supervisor communication terminal 70, the communication unit 61 and the communication unit 71 can communicate with each other.

  The communication monitoring unit 62 monitors the communication state between the communication unit 61 and the communication unit 71 and determines whether or not the communication state satisfies a predetermined condition. The predetermined condition of the communication state in this embodiment is assumed to be communicable. That is, if the communication unit 61 and the communication unit 71 are in a communicable state, the communication monitoring unit 62 determines that a predetermined condition is satisfied.

  The recording unit 65 records predetermined transmission destination information that is a transmission destination of position information of the supervisory communication terminal 70. In the present embodiment, the recording unit 65 records the mail address of the supervisor communication terminal 70.

  When the configuration of the communication system according to the second embodiment is compared with the configuration of the communication system according to the present embodiment, the following points are different. That is, in the second embodiment, the supervisor communication terminal has the communication monitoring unit, but in this embodiment, the supervisor communication terminal has a communication monitoring unit. In the second embodiment, the supervisor communication terminal has a position information request unit. However, the supervisor communication terminal in the present embodiment is different in that it does not have a position information request unit.

  Next, the operation of the communication system in this embodiment will be described.

  The operation when the communication unit 61 and the communication unit 71 are in a communicable state is the same as that of the second embodiment, and a description thereof will be omitted.

  Next, a case where the supervisor communication terminal 60 and the supervisor communication terminal 70 are separated by a predetermined distance or more will be described.

  When the supervisor communication terminal 60 is located outside the communicable range A of the supervisor communication terminal 70, the communication unit 61 and the communication unit 71 cannot communicate with each other.

  In this case, the communication monitoring unit 62 of the supervisor communication terminal 60 determines that the communication state between the communication unit 61 and the communication unit 71 does not satisfy a predetermined condition.

  When the communication monitoring unit 62 determines that the communication state between the communication unit 61 and the communication unit 71 does not satisfy the predetermined condition, the position information acquisition unit 63 acquires the position information of the supervisory communication terminal 60. The position information is configured to be acquired from a satellite such as GPS, for example.

  Then, the transmission unit 64 transmits the position information acquired by the position information acquisition unit 63 to the transmission destination recorded in the recording unit 65. In the present embodiment, the transmission unit 64 transmits the position information of the supervisor communication terminal 60 to the mail address of the supervisor communication terminal 70 by electronic mail.

  The receiving unit 72 of the supervisor communication terminal 70 receives the position information transmitted from the transmitting unit 64. Thereby, the supervisor who uses the supervisor communication terminal 70 can grasp the position of the supervisor.

  As described above, in the present embodiment, when the communication unit 61 and the communication unit 71 are unable to communicate, the position information of the supervisor communication terminal 60 is transmitted to the supervisor communication terminal 70. Therefore, the supervisor can know where the supervised person is. Thereby, when there is a possibility that the supervisor is lost, the supervisor can quickly grasp the position of the supervisor. The supervisor can discover the supervised person at an early stage.

  As a modification of the present embodiment, a notification unit 66 may be provided in the supervisor communication terminal 60 as shown in FIG. When the communication monitoring unit 62 determines that the communication state between the communication unit 61 and the communication unit 71 does not satisfy a predetermined condition, the notification unit 66 generates a notification.

  The notification method by the notification unit 66 is that the supervisor who is the user of the communication terminal 60 for the supervisor does not satisfy the predetermined condition in the communication state between the communication unit 61 and the communication unit 71, that is, Any method can be used as long as it can recognize that there is a possibility of getting lost. For example, the notification unit 66 may notify by generating voice or music. Or it is good also as notifying by generating light or vibration. Furthermore, it is good also as notifying by carrying out a predetermined display on the display part of the communication terminal 60 for supervisors. At this time, examples of the message displayed by the notification unit 66 include a message “Please call the supervisor” and “Please enter a nearby police box”.

  Moreover, the notification part 66 is good also as displaying the information of the communicable distance of the communication part 61 and the communication part 71, for example, the radius of the communicable range A of the communication terminal 70 for supervisors. For example, it is assumed that the notification unit 66 is a display unit, and the communicable range A is a range within a radius of 10 m from the supervisory communication terminal 70. In this case, the notification unit 66 may display “You are away from the supervisor by a radius of 10 m or more”.

  As described above, when the communication unit 61 and the communication unit 71 are unable to communicate with each other, the notification unit 66 of the supervisory communication terminal 60 generates a notification. As a result, the supervised person can know that he / she has moved away from the supervisor by a predetermined distance or more. Therefore, the supervised person can quickly notice that he / she has lost his / herself, and can quickly take actions such as contacting the supervisor and requesting instructions.

  In addition, when the supervisor communication terminal 60 and the supervisor communication terminal 70 are not in an environment where communication is possible via the base station, the position information cannot be transmitted and received. However, when the notification unit 66 generates a notification, the supervised person can notice that he / she is away from the supervisor.

  In the present embodiment as well, as in the second embodiment, the predetermined communication condition can be communicated. However, the present invention is not limited to this. That is, the predetermined condition of the communication state may be added to the condition that the communication speed is a certain level or more.

  Also, the supervisor communication terminal 70 in the present embodiment may include a communication monitoring unit and a notification unit, as in the second embodiment.

  Further, in the present embodiment as well, as in the second embodiment, the supervisory history terminal 60 and the supervisory communication terminal 70 are respectively a broadcast receiving unit, a camera unit, a transmitting unit, a receiving unit, and an audio processing unit. Further, a video processing unit, an operation unit, and the like may be further provided.

  Further, in the first to third embodiments, a recording medium recording software program codes for realizing the functions of each embodiment is supplied to a communication terminal, and the computer of the communication terminal is stored in the recording medium. Needless to say, this can also be achieved by reading and executing the program code.

  As the recording medium for supplying the program, for example, the above-mentioned program can be stored such as a CD-ROM (Compact Disc Read Only Memory), a DVD-R (Digital Versatile Disk Recordable), an optical disc, a magnetic disc, and a nonvolatile memory card. Anything is fine.

  A part or all of the above-described embodiment can be described as in the following supplementary notes, but is not limited thereto.

  (Supplementary Note 1) A first communication terminal having a first communication unit, a position information acquisition unit, and a transmission unit, and a second communication capable of communicating with the first communication unit within a predetermined distance. A second communication terminal having a communication unit and a reception unit, and when the communication state between the first communication unit and the second communication unit no longer satisfies a predetermined condition, the position information An acquisition unit acquires position information of the first communication terminal, the transmission unit transmits the position information, and the reception unit receives the position information.

  (Additional remark 2) Said 2nd communication terminal is a communication monitoring part which monitors the communication state of said 1st communication part and said 2nd communication part, and positional information acquisition instruction with respect to said 1st communication terminal A position information requesting unit that transmits the information, and when the communication monitoring unit determines that the communication state between the first communication unit and the second communication unit no longer satisfies the predetermined condition, The position information request unit transmits the position information acquisition instruction, and when the first communication terminal receives the position information acquisition instruction, the position information acquisition unit acquires the position information. The communication system according to attachment 1.

  (Supplementary Note 3) The first communication terminal further includes a communication monitoring unit that monitors a communication state between the first communication unit and the second communication unit, and the communication monitoring unit includes the first communication unit. The communication system according to supplementary note 1, wherein the position information acquisition unit acquires the position information when it is determined that the communication state between the communication unit and the second communication unit no longer satisfies a predetermined condition.

  (Supplementary Note 4) The first communication terminal further includes a first notification unit, and when a communication state between the first communication unit and the second communication unit no longer satisfies the predetermined condition, The communication system according to any one of appendices 1 to 3, wherein the first notification unit generates a first notification.

  (Supplementary Note 5) The communication system according to Supplementary Note 4, wherein the first notification includes information on a distance at which the first communication unit and the second communication unit can communicate with each other.

  (Supplementary Note 6) The second communication terminal further includes a second notification unit, and when the communication state between the first communication unit and the second communication unit no longer satisfies the predetermined condition, The communication system according to any one of appendices 1 to 5, wherein the second notification unit generates a second notification.

  (Supplementary note 7) The communication system according to supplementary note 6, wherein the second notification includes information on a distance at which the first communication unit and the second communication unit can communicate with each other.

  (Additional remark 8) In a communication terminal, the communication part which can communicate with the other party communication terminal in the range of the predetermined distance from the said communication terminal, The communication monitoring part which monitors the communication state of the said other party communication terminal and the said communication part, A location information requesting unit that transmits a location information acquisition instruction to the counterpart communication terminal; and a reception unit that receives location information of the counterpart communication terminal, wherein the communication monitoring unit includes the communication unit and the counterpart When it is determined that the communication state with the communication terminal no longer satisfies a predetermined condition, the position information request unit transmits the position information acquisition instruction to the counterpart communication terminal.

  (Additional remark 9) In a communication terminal, the communication part which can communicate with the other party communication terminal in the range of the predetermined distance from the said communication terminal, The communication monitoring part which monitors the communication state of the said other party communication terminal and the said communication part, A position information acquisition unit that acquires the position information of the communication terminal, and a transmission unit that transmits the acquired position information, wherein the communication monitoring unit is in a communication state between the communication unit and the counterpart communication terminal. If it is determined that a predetermined condition is not satisfied, the position information acquisition unit acquires the position information.

  (Additional remark 10) A notification part is further provided, and the notification part sends a predetermined notification when the communication monitoring part determines that the communication state between the communication part and the counterpart communication terminal no longer satisfies the predetermined condition. The communication terminal according to appendix 8 or 9, wherein the communication terminal is performed.

  (Supplementary Note 11) The communication terminal according to Supplementary Note 10, wherein the predetermined notification includes information on a distance at which the communication unit and the counterpart communication terminal can communicate with each other.

  (Additional remark 12) In the communication method of a communication terminal, the communication process which communicates with the other party communication terminal in the range of the said communication terminal and a predetermined distance, the communication monitoring process which monitors the communication state in the said communication process, The said other party communication A position information requesting step for transmitting a position information acquisition instruction to the terminal; and a receiving step for receiving the position information of the counterpart communication terminal. In the communication monitoring step, a communication state in the communication step is a predetermined condition. If it is determined that the condition information is no longer satisfied, the position information acquisition instruction is transmitted to the counterpart communication terminal in the position information requesting step.

  (Additional remark 13) In the communication method of a communication terminal, the communication process which communicates with the other party communication terminal in the range of the said communication terminal and a predetermined distance, the communication monitoring process which monitors the communication state in the said communication process, The said communication terminal A position information acquisition step of acquiring the position information of the device, and a transmission step of transmitting the acquired position information. In the communication monitoring step, it is determined that the communication state in the communication step no longer satisfies a predetermined condition. In this case, in the position information acquisition step, the position information is acquired.

  (Additional remark 14) In the said communication monitoring process, when it determines with the communication state in the said communication process being no longer satisfy | filling the said predetermined conditions, the notification process which performs a predetermined notification is further provided, The additional remark 12 or 13 characterized by the above-mentioned. The communication method described in 1.

  (Supplementary note 15) The communication method according to supplementary note 14, wherein the predetermined notification includes information on a distance at which the communication terminal and the counterpart communication terminal can communicate with each other.

  (Additional remark 16) In the communication program which makes a communication terminal perform predetermined operation | movement, the communication process which communicates with the other party communication terminal in the range of the said communication terminal and a predetermined distance, and the communication monitoring which monitors the communication state in the said communication process In the communication monitoring step, causing the communication terminal to execute a step, a location information requesting step of transmitting a location information acquisition instruction to the counterpart communication terminal, and a reception step of receiving the location information of the counterpart communication terminal. When it is determined that the communication state in the communication process no longer satisfies a predetermined condition, the position information acquisition instruction is transmitted to the counterpart communication terminal in the position information request process.

  (Additional remark 17) In the communication program which makes a communication terminal perform predetermined operation | movement, the communication monitoring which communicates with the other party communication terminal within the range of the said communication terminal and a predetermined distance, and the communication monitoring which monitors the communication state in the said communication process A communication process in the communication step in the communication monitoring step, wherein the communication terminal is caused to execute a step, a position information acquisition step of acquiring the position information of the communication terminal, and a transmission step of transmitting the acquired position information. Is determined to no longer satisfy a predetermined condition, the position information acquisition step acquires the position information.

  (Supplementary note 18) The communication monitoring step further includes a notification step of performing a predetermined notification when it is determined that the communication state in the communication step no longer satisfies the predetermined condition. The communication program described in 1.

  (Supplementary note 19) The communication program according to supplementary note 10, wherein the predetermined notification includes information on a distance at which the communication terminal and the counterpart communication terminal can communicate with each other.

  (Supplementary note 20) A recording medium for recording the communication program according to any one of supplementary notes 16 to 19.

DESCRIPTION OF SYMBOLS 10 1st communication terminal 11 1st communication part 12 Location information acquisition part 13, 33, 64 Transmission part 20 2nd communication terminal 21 2nd communication part 22, 44, 72 Reception part 30, 60 For supervised persons Communication terminal 31, 41, 61, 71 Communication unit 32, 63 Position information acquisition unit 40, 70 Supervisor communication terminal 42, 62 Communication monitoring unit 43 Position information request unit 45, 66 Notification unit 46 Broadcast reception unit 47 Recording unit 48 Camera unit 49 Transmission unit 50 Reception unit 51 Audio processing unit 52 Video processing unit 53 Operation unit 54 Control unit 55 Bus 65 Recording unit

Claims (10)

A first communication terminal having a first communication unit, a position information acquisition unit, and a transmission unit;
A second communication terminal having a second communication unit capable of communicating with the first communication unit within a predetermined distance; and a receiving unit;
When the communication state between the first communication unit and the second communication unit no longer satisfies a predetermined condition, the position information acquisition unit acquires the position information of the first communication terminal, and the transmission unit Transmits the position information, and the receiving unit receives the position information. The second communication terminal includes a communication monitoring unit that monitors a communication state between the first communication unit and the second communication unit, and a position that transmits a position information acquisition instruction to the first communication terminal. An information requesting unit;
When the communication monitoring unit determines that the communication state between the first communication unit and the second communication unit no longer satisfies the predetermined condition, the position information request unit transmits the position information acquisition instruction. And
The communication system according to claim 1, wherein when the first communication terminal receives the position information acquisition instruction, the position information acquisition unit acquires the position information. The first communication terminal further includes a communication monitoring unit that monitors a communication state between the first communication unit and the second communication unit,
When the communication monitoring unit determines that the communication state between the first communication unit and the second communication unit no longer satisfies a predetermined condition, the position information acquisition unit acquires the position information. The communication system according to claim 1. The first communication terminal further includes a first notification unit,
The first notification unit generates a first notification when a communication state between the first communication unit and the second communication unit no longer satisfies the predetermined condition. Item 4. The communication system according to any one of Items 1 to 3. The second communication terminal further includes a second notification unit,
The second notification unit generates a second notification when a communication state between the first communication unit and the second communication unit does not satisfy the predetermined condition. Item 5. The communication system according to any one of Items 1 to 4. In the communication terminal,
A communication unit capable of communicating with a partner communication terminal within a predetermined distance from the communication terminal;
A communication monitoring unit for monitoring a communication state between the counterpart communication terminal and the communication unit;
A location information requesting unit that transmits a location information acquisition instruction to the counterpart communication terminal;
A receiving unit for receiving position information of the counterpart communication terminal,
When the communication monitoring unit determines that the communication state between the communication unit and the counterpart communication terminal no longer satisfies a predetermined condition, the location information request unit transmits the location information acquisition instruction to the counterpart communication terminal. A communication terminal. In the communication terminal,
A communication unit capable of communicating with a partner communication terminal within a predetermined distance from the communication terminal;
A communication monitoring unit for monitoring a communication state between the counterpart communication terminal and the communication unit;
A location information acquisition unit for acquiring location information of the communication terminal;
A transmission unit for transmitting the acquired position information,
When the communication monitoring unit determines that the communication state between the communication unit and the counterpart communication terminal no longer satisfies a predetermined condition, the position information acquisition unit acquires the position information. In the communication method of the communication terminal,
A communication step of communicating with the other communication terminal within a predetermined distance from the communication terminal;
A communication monitoring step of monitoring a communication state in the communication step;
A location information requesting step for transmitting a location information acquisition instruction to the counterpart communication terminal;
Receiving the position information of the counterpart communication terminal,
In the communication monitoring step, when it is determined that the communication state in the communication step no longer satisfies a predetermined condition, the location information requesting step transmits the location information acquisition instruction to the counterpart communication terminal. Communication method. In a communication program for causing a communication terminal to execute a predetermined operation,
A communication step of communicating with the other communication terminal within a predetermined distance from the communication terminal;
A communication monitoring step of monitoring a communication state in the communication step;
A location information requesting step for transmitting a location information acquisition instruction to the counterpart communication terminal;
Receiving the position information of the counterpart communication terminal, and causing the communication terminal to execute,
In the communication monitoring step, when it is determined that the communication state in the communication step no longer satisfies a predetermined condition, the location information requesting step transmits the location information acquisition instruction to the counterpart communication terminal. A communication program.   A recording medium for recording the communication program according to claim 9.

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