JP6367755B2 - In-vehicle terminal device, inter-pedal communication system including the same, and stop method for inter-pedal communication - Google Patents

Description

  The present invention relates to an in-vehicle terminal device for inter-step communication for performing wireless communication between a pedestrian terminal carried by a pedestrian and an in-vehicle terminal mounted on a vehicle, an inter-pedal communication system provided with the same, and an inter-pedal communication It relates to the stopping method.

  According to the traffic safety white paper, the absolute value of the number of traffic accidents in recent years has been on a decreasing trend, but it is pointed out that the percentage of walking is the highest in the breakdown. In order to improve safety for such pedestrians, research and development have been conducted on using an inter-pedal communication system of ITS (Intelligent Transport System), which is a safe driving support radio system.

  An inter-pedal communication device used in an inter-pedal communication system acquires information (current position, traveling direction, moving speed, etc.) of a moving body (pedestrian, vehicle) possessing the inter-pedal communication device and broadcasts its own information. Send with. As a result, the inter-pedal communication device can provide safe driving support for the possibility of traffic jams and collision accidents based on the above information received from other inter-pedal communication devices and the above-described information on itself.

  On the other hand, since the broadcast inter-vehicle communication is performed by one channel using the 700 MHz frequency allocated in the ITS, in busy areas and places with a lot of traffic, for example, communication Difficulties and communication delays may occur. In order to suppress the influence of such line congestion, it is possible to perform short-range wireless communication within a predetermined area by enabling short-range wireless communication in a communication area narrower than the communication area of wireless signals by inter-vehicle communication. In such a case, a system has been proposed in which inter-pedal communication of the inter-pedal communication device is stopped and inter-pedal communication is performed when the vehicle goes out of a predetermined area (for example, see Patent Document 1).

International Publication No. 2012/114568

  In the above-mentioned Patent Document 1, examples of pedestrian crossings and buildings are given as predetermined areas, and base stations are provided in these areas, and when a pedestrian enters and exits these areas, it walks by exchanging signals with the base station apparatus. ON / OFF is controlled for inter-pedal communication of the person terminal device. However, for a predetermined area, a base station equipped with the pedestrian terminal device is accessed by short-range wireless communication, and for example, the pedestrian terminal device is touched (held) over the base station device. Since the operation is necessary, there is not only troublesome handling but also a problem that if the operation is forgotten, communication between pedestrians is continued and power saving is not achieved.

  Also, when a vehicle approaches a place where there are many pedestrians, when pedestrian information is transmitted from each pedestrian terminal device by inter-pedestrian communication, for example, a large amount of pedestrian information is displayed on a car navigation screen. The driver will feel annoyed.

  In the above-mentioned Patent Document 1, when a plurality of pedestrians are lined up and an inter-pedal communication including position information from another pedestrian terminal device is received, an inter-pedal communication from its own pedestrian terminal device is performed. I try to turn it off. In such a case, the other pedestrian terminal device is in a state where broadcast communication between pedestrians is broadcast to a third party, so that the third party walks based on position information from the other pedestrian terminal device. This is a case where the existence of a person can be known. Since there is no need to separately transmit pedestrian information from a nearby pedestrian terminal device, for example, when a third party is a vehicle, there is no problem in providing safe driving support. In this way, it is said that the congestion of the line can be suppressed and the power saving of the pedestrian terminal device with a small remaining battery capacity can be improved.

  However, when pedestrians are lined up, communication between pedestrian terminal devices is required first, and inter-vehicle communication is turned off according to the result. There is a problem that it is enough.

  The present invention has been devised to solve such problems of the prior art, and its main purpose is to eliminate the inconvenience of the driver and provide a pedestrian in assisting safe driving. An object of the present invention is to provide an in-vehicle terminal device configured to be able to improve power saving of a terminal device, an inter-pedal communication system including the same, and an inter-pedal communication stopping method.

An in-vehicle terminal device according to the present invention is an in-vehicle terminal device mounted on a vehicle for performing inter-pedestrian communication with a pedestrian terminal device carried by a pedestrian . a radio signal including a traveling attention notification indicating that there is the pedestrian terminal device to the traveling attention area and the vehicle-mounted terminal communication unit that receives from the pedestrian terminal device, based on the travel note notice received, the traveling A pedestrian number determination unit that determines whether or not there are a plurality of the pedestrian terminal devices in the caution area, and the pedestrian number determination unit determines that the pedestrian terminal devices are the predetermined number or more. A transmission stop notification for stopping transmission of inter-pedestrian communication with respect to a specific pedestrian terminal device that forms at least a part of the plurality of pedestrian terminal devices that have transmitted the wireless signal Sent by A transmission stop processing unit which is configured to have a.

  According to the present invention, when there are a predetermined number or more of pedestrians in the travel attention area, the driver of the vehicle can transmit the inter-pedestrian communication stop notification to the pedestrian terminal device. In addition, the pedestrian terminal device can stop the transmission of inter-pedal communication transmissions as a result of alerting the driver, thus reducing battery consumption due to transmission. It is possible to improve the power saving of the pedestrian terminal device.

Schematic diagram showing an example of an inter-vehicle communication system according to the present invention. (A) is a schematic block diagram of a pedestrian terminal device, (B) is a schematic block diagram of a vehicle-mounted terminal device. The figure which shows the positional relationship of a pedestrian and a vehicle The figure which shows the positional relationship of the pedestrian in the driving | running | working caution area in 1st Example, and the vehicle which drive | works a roadway. Sequence diagram of control of pedestrian terminal device and in-vehicle terminal device in first embodiment (A) is a figure which shows an example of the display example of the screen of a car navigation, (B) is a figure which shows the other example of the display example of a screen. Sequence diagram in the second embodiment The figure which shows the positional relationship of the pedestrian and vehicle in 3rd Example. Sequence diagram in the third embodiment The figure which shows the positional relationship of the pedestrian and vehicle in 4th Example. Sequence diagram in the fourth embodiment The figure which shows the positional relationship of the pedestrian and vehicle in 5th Example. Sequence diagram in the fifth embodiment The figure which shows the positional relationship of the pedestrian and vehicle in 6th Example. Sequence diagram in the sixth embodiment

A first invention made to solve the above-mentioned problem is an in-vehicle terminal device mounted on a vehicle for performing inter-pedestrian communication with a pedestrian terminal device carried by a pedestrian, and the vehicle is careful A vehicle-mounted terminal communication unit that receives from the pedestrian terminal device a radio signal including a travel caution notification indicating that the pedestrian terminal device is within a predetermined travel caution area to be traveled, and the received travel caution Based on the notification , the pedestrian terminal device determines whether the pedestrian terminal device has a plurality of predetermined number or more in the travel attention area, and the pedestrian number determination unit causes the pedestrian terminal device to When it is determined that there is a predetermined number or more, a transmission stop that stops transmission of inter-pedestrian communication with respect to a specific pedestrian terminal device that forms at least a part of the plurality of pedestrian terminal devices that transmitted the wireless signal Notice the car A structure having a transmission stop processing unit for transmitting the terminal communication unit.

  According to this, when there are a predetermined number or more of pedestrians in the driving caution area, the vehicle driver sends notifications from a number of pedestrian terminal devices by sending notification of inter-pedestrian communication stop to the pedestrian terminal devices. In the pedestrian terminal device, it is possible to suppress the battery exhaustion due to the transmission, because the stop transmission transmission between pedestrians is transmitted as a result of alerting the driver. Power saving of the pedestrian terminal device can be improved.

The second invention, the deceleration detecting unit further comprises a detecting a deceleration of the vehicle, the transmission stop processing unit, when the deceleration of the vehicle by the deceleration detecting portion is detected, the pedestrian The transmission stop notification is transmitted to the terminal device by the in- vehicle terminal communication unit .

  According to this, when the driver recognizes the presence of a pedestrian and decelerates, a transmission stop notification is transmitted to the pedestrian terminal device by inter-pedestrian communication, thereby stopping the transmission of the driving attention notification from the pedestrian terminal device Therefore, the transmission of the driving attention notification can be stopped without any problem.

Moreover, 3rd invention is the structure which the said transmission stop process part selects the said specific pedestrian terminal device based on own vehicle positional information and the pedestrian positional information transmitted from the said pedestrian terminal device. And

  According to this, by specifying a pedestrian that is a target to stop transmission of a driving attention notice, for example, a driver for a pedestrian located closer to the vehicle or a pedestrian located in the traveling direction of the vehicle. Therefore, it is possible to stop the transmission from such a pedestrian terminal device and improve power saving.

According to a fourth aspect of the present invention , the wireless signal from the pedestrian terminal device includes battery remaining amount information, and the transmission stop processing unit is configured to transmit the specific pedestrian terminal based on the battery remaining amount information. The device is selected.

  According to this, since the transmission of the driving caution notice is preferentially given priority to the pedestrian terminal device with a small battery remaining amount, the safe driving support for the vehicle by the transmission of the driving caution notification from the pedestrian terminal device with a large battery remaining amount is performed. The battery consumption of the pedestrian terminal device with a small remaining battery capacity can be suppressed while maintaining the above.

In addition, according to a fifth aspect of the present invention , the transmission stop processing unit includes the pedestrian terminal device that is within a predetermined distance from each other based on the pedestrian position information transmitted from the plurality of pedestrian terminal devices. From the above, the specific pedestrian terminal device is selected.

  According to this, even if a large number of caution notices are received, if there are pedestrians located far away, it will be even safer by not stopping the transmission of the caution notices for those distant pedestrians. Driving can be performed.

Further, the sixth invention is configured such that the transmission stop processing unit transmits a communication start notification by the in-vehicle terminal communication unit when the vehicle leaves a predetermined area of the specific pedestrian terminal device. To do.

  According to this, when a vehicle leaves | separates from the pedestrian terminal device which performed transmission stop, the pedestrian terminal device can restart transmission of the travel attention notification with respect to another vehicle.

Moreover, 7th invention is set as the communication system between pedestrians comprised using the said vehicle-mounted terminal device in any one of the said 1st thru | or 6 and the said pedestrian terminal device which performs communication between pedestrians.

In an eighth aspect of the invention , the pedestrian terminal device includes a position information acquisition unit that acquires pedestrian position information by satellite positioning, and a pedestrian terminal communication unit that receives a radio signal transmitted from the in-vehicle terminal device. The pedestrian terminal communication unit receives the transmission stop notification from the in-vehicle terminal communication unit and stops transmission of the inter-pedestrian communication, and then, based on the pedestrian position information, the travel attention area When it is determined that the vehicle has gone out of the vehicle, the transmission of the inter-vehicle communication is resumed.

  According to this, when a pedestrian carrying a pedestrian terminal device that has stopped communication between pedestrians due to a transmission stop notification from the vehicle goes out of the travel attention area, the pedestrian terminal device spontaneously communicates between the pedestrians. And the transmission of the travel warning notice to other vehicles can be resumed.

In a ninth aspect of the invention , the pedestrian terminal device includes a pedestrian terminal communication unit that receives a radio signal transmitted from the in-vehicle terminal device, and the pedestrian terminal communication unit includes a plurality of the in-vehicle terminals. Only when all the radio signals received from the apparatus include the transmission stop notification, the transmission of the inter-pedestrian communication is stopped.

  According to this, when the inter-pedestrian communication transmission stop notification is received from all the vehicles of the plurality of vehicles within the inter-pedestrian communication range of the pedestrian terminal device, all the vehicles can be cautiously run with respect to the pedestrian Therefore, the battery consumption of the pedestrian terminal device can be suppressed by stopping the transmission of the driving attention notification.

Further, in a tenth aspect of the present invention , when the pedestrian terminal communication unit receives a transmission start notification from any of the plurality of in-vehicle terminal devices after stopping transmission of the inter-vehicle communication, the pedestrian terminal communication unit It is set as the structure which restarts transmission of communication between vehicles.

  According to this, the safety of a pedestrian can be ensured by resuming transmission when a transmission start notification is received from any vehicle.

In an eleventh aspect of the invention , the pedestrian terminal device includes a pedestrian terminal communication unit that receives a radio signal transmitted from the in-vehicle terminal device, and a position information acquisition unit that acquires pedestrian position information by satellite positioning. A map information acquisition unit that acquires map information including a safety zone where travel of vehicles is prohibited, and the pedestrian terminal communication unit is based on the pedestrian location information and the map information. While it is determined that a pedestrian is in the safety zone, the transmission of the inter-vehicle communication is stopped.

  According to this, when a pedestrian is in a safety zone, it is not necessary to transmit pedestrian information by transmission of inter-pedestrian communication toward the vehicle, so that wasteful battery consumption due to transmission of inter-pedal communication is suppressed. be able to.

Also, twelfth aspect of the pedestrian a pedestrian terminal device and stop process of step-vehicle communications in-vehicle terminal apparatus mounted on a vehicle in order to perform the step-vehicle communication between the portable, vehicle care Then, a radio signal including a travel attention notification indicating that the pedestrian terminal device is in a predetermined travel attention area to be traveled is received from the pedestrian terminal device, and based on the received travel attention notification , It is determined whether or not there are a plurality of the pedestrian terminal devices in the travel attention area, and the wireless signal is transmitted when it is determined that the pedestrian terminal devices are the predetermined number or more. A method of transmitting a transmission stop notification for stopping transmission of inter-pedestrian communication to a specific pedestrian terminal device that forms at least a part of the plurality of pedestrian terminal devices.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a schematic diagram showing an example of an inter-pedal communication system according to the present invention. As shown in the figure, a pedestrian 1 possesses a portable pedestrian terminal device 2, and a vehicle 3 is equipped with an in-vehicle terminal device 4. The pedestrian terminal device 2 is integrally connected to the portable information terminal 5 such as a smartphone or a mobile phone, but may be built in the portable information terminal 5 in advance. The in-vehicle terminal device 4 is integrally connected to the car navigation 6, but may be built in the car navigation 6 in advance. The pedestrian terminal device 2 and the in-vehicle terminal device 4 may receive signals from a plurality of satellites 7 constituting GPS (Global Positioning Network) and QZSS (Quasi-Zenith Satellite System), and generate their own position information. Each can have a known satellite positioning structure.

  FIG. 2A is a schematic block diagram of the pedestrian terminal device 2. The pedestrian terminal device 2 receives a signal from the satellite 7 and acquires a position information acquisition unit 21 that acquires its own position information, and pedestrian information including its own position information (pedestrian terminal position information) and vehicle waiting information. Is transmitted as a broadcast as a radio signal, and information processing is performed between the communication unit 22 as a pedestrian terminal communication unit for receiving a radio signal transmitted from the in-vehicle terminal device 4 and the portable information terminal 5 It is determined whether the portable terminal processing unit 23, the control unit 25 that performs overall control by program processing using a CPU, and the remaining amount of the battery 2a serving as the power source of the pedestrian terminal device 2 is greater than or equal to a predetermined amount. And a battery remaining amount determination unit 26. An antenna 22 a for performing transmission / reception is connected to the communication unit 22. The control unit 25 stores information on the vehicle 3 (on-vehicle terminal device 4) and other pedestrians 1 (other pedestrian terminal devices 2) in an inter-walk communication range 42 (see FIG. 3) described later. The other terminal information acquisition unit 25a to acquire and the map information acquisition unit 25b to acquire map information are each configured by a program.

  FIG. 3 is a diagram illustrating a positional relationship between the pedestrian 1 and the vehicle 3 in a state where the pedestrian 1 is located on the side of the roadway 8 and the vehicle 3 heading for the pedestrian 1 is traveling on the roadway 8. Further, the figure shows an inter-pedestrian communication area 41 that is an arrival range of radio waves transmitted from the in-vehicle terminal device 4 and an inter-pedestrian communication area 42 that is an arrival range of electric waves transmitted from the pedestrian terminal apparatus 2. Has been. The radii Rc and Rw of the inter-pedestrian communication areas 41 and 42 depend on the magnitude of the output emitted from the respective communication units 22 and 32, but may be about 100 m, for example, in a place with good visibility.

  FIG. 2B is a schematic block diagram of the in-vehicle terminal device 4. The in-vehicle terminal device 4 receives a signal from the satellite 7, receives a position information acquisition unit 31 that acquires its own position information, and broadcasts predetermined vehicle information including its own position information (in-vehicle terminal position information) as a radio signal. And a car navigation processing unit 33 that processes information between the car navigation 6 and a communication unit 32 as an in-vehicle terminal communication unit for receiving a radio signal transmitted from the pedestrian terminal device 2. The position of the pedestrian 1 is displayed on the map displayed on the screen 6a of the car navigation 6 based on the control unit 36 that performs overall control by program processing using, for example, a CPU, and the pedestrian terminal position information, The brake is connected to a notification unit 37 for notifying the driver of the position of the pedestrian 1 and a stroke sensor 14 for detecting the stroke of the brake pedal 13. A deceleration detection unit 38 for detecting that the dull 13 is operated by the output of the stroke sensor 14 is constituted by. An antenna 32a for transmitting and receiving is connected to the communication unit 32. The control unit 36 includes another terminal information acquisition unit 36a that acquires information on the pedestrian 1 (pedestrian terminal device 2) and other vehicles (other in-vehicle terminal devices 4) in the inter-pedal communication area 41. And determining whether or not the number of pedestrians in the travel attention area to be described later is more than a predetermined number based on the pedestrian information from the pedestrian terminal device 2 and the map information acquisition unit 36b that acquires the map information The program includes a pedestrian number determination unit 36c that performs transmission and a transmission stop processing unit 36d that transmits a transmission stop notification that stops transmission of inter-vehicle communication from the pedestrian terminal device 2 using the communication unit 32.

  As a frequency used for a radio signal transmitted from each of the antennas 22a and 32a, a 700 MHz band assigned as one of frequencies for an ITS (Intelligent Transport System) that is a safe driving support radio system is used. By using this frequency band, the amount of diffracted radio waves is large compared to the 5.8 GHz band, which is another frequency used as ITS, and the radio waves wrap around behind obstacles (buildings, large vehicles, etc.). Therefore, even when the pedestrian terminal device 2 and the in-vehicle terminal device 4 are in a positional relationship where they cannot see each other, reliable information transmission is possible.

  In the inter-vehicle communication system configured as described above, a first embodiment according to the present invention will be described with reference to FIGS. FIG. 4 shows a vehicle 3 traveling on a roadway 8 toward an intersection 10 and pedestrians W1, W2, W3,..., Wn (hereinafter simply referred to as pedestrians) on a sidewalk 9 extending along the roadway 8. Is a diagram showing a positional relationship with W.) FIG. 5 is a sequence diagram in the control of signal exchange with the pedestrian terminal device 2 in the in-vehicle terminal device 4. 6A is an example of a display example of the screen 6a of the car navigation 6 when the vehicle 3 approaches the pedestrian 1, and FIG. 6B is another example of the display example of the screen 6a. . The control may be, for example, a program process in a known CPU, and various processes in the following description are also executed by a program process by the control units 25 and 36 unless otherwise specified. It's okay.

  Further, it is assumed that a travel caution area Ad (see FIG. 4) as an area where the vehicle 3 with respect to the pedestrian W should travel with caution is registered in advance in the map information of the portable information terminal 5, for example. The traveling attention area Ad is, for example, a sidewalk 9 extending along the roadway 8 as shown by a shaded area in FIG. 4, and a predetermined range up to the intersection 10 can be considered. It is not limited to. For example, a place where the risk of the pedestrian 1 jumping out or crossing the roadway 8 is high.

  In this embodiment, when it is determined by the pedestrian terminal device 2 possessed by the pedestrian W that the user is in the travel caution area Ad based on the pedestrian position information and the map information, the communication unit 22 issues a travel caution. Pedestrian information including the notification is transmitted by broadcast using a radio signal for inter-pedal communication. When the vehicle-mounted terminal device 4 of the vehicle 3 that has approached the travel caution area Ad receives pedestrian information including a travel caution notification from the pedestrian W, the in-vehicle terminal device 4 notifies that the pedestrian W is in the travel caution area Ad. The driver is notified by the unit 37. For example, the notification is generated by audio by using the function of the car navigation 6 or, as shown in FIG. 6A, a mark (for example, blinking of a circle) M indicating the pedestrian W on the map of the screen 6a. May be displayed, and the pronunciation and the display on the screen 6a may be performed simultaneously.

  In the following description, transmission / reception between the pedestrian terminal device 2 and the in-vehicle terminal device 4 is intended for pedestrians W1, W2, W3,..., Wn and the vehicle 3 as shown in FIG. I will explain. The vertical axis in FIG. 5 corresponds to the time axis (hereinafter the same).

  As shown in FIG. 4, when there are a plurality of pedestrians W1, W2, W3,..., Wn in the travel attention area Ad, the in-vehicle terminal device 4 moves closer to the travel attention area Ad. The pedestrian information including the travel attention notification transmitted from the pedestrian terminal device 2 is sequentially received as shown in FIG. 5, for example. And it is determined by the pedestrian number determination part 36c whether the number of the received pedestrian terminal devices 2 is more than predetermined number N (for example, 3). When it is determined that the number is greater than or equal to the predetermined number N, vehicle information including transmission stop information (pre-communication stop communication notification) defined in advance is generated by the communication unit 32 and transmitted. The transmission stop information includes the identification ID of each pedestrian terminal device 2 that has transmitted the travel attention notification, and the corresponding pedestrian terminal device 2 can receive the information.

  In each pedestrian terminal device 2 of pedestrians W1,..., Wn that has received vehicle information including inter-pedestrian communication stop notification, transmission of inter-pedal communication is stopped (OFF). In addition, in the time axis | shaft of each pedestrian W1, ..., Wn of FIG. 5, the state "ON" which is transmitting the communication between pedestrians is shown as a continuous line, and the state "OFF" which has stopped is shown with a broken line This is shown (the same applies hereinafter).

  In this way, when the travel attention notices from a large number of pedestrians W are received, for example, as shown in FIG. 6A, all the marks M indicating the pedestrians W are displayed on the map of the screen 6a. If the notification is given to the driver, the notification process is performed each time the driver receives it, which makes the driver feel bothersome. In particular, when a sound is accompanied, if the sound is pronounced every time a notice of travel attention is received from each pedestrian W, it becomes even more troublesome.

  On the other hand, if only the pedestrian W is present in the travel caution area Ad, the driver is conscious of approaching the travel caution area Ad where the pedestrian W is present, even if there is no more information (number of people). be able to. In particular, in the case of inter-vehicle communication using the 700 MHz band assigned as one of the ITS frequencies, transmission / reception is performed within the inter-vehicle communication area (41 and 42 in FIG. 3) of about 100 m. Since the inter-pedestrian communication stop notification is transmitted within such a relatively short distance, even if the travel attention notification is not transmitted from the pedestrian W due to the inter-pedal communication stop notification, the driver can Since the vehicle 3 approaches the travel attention area Ad while maintaining the recognition that the pedestrian W to be aware of is approached by the caution notification, the driving with attention directed to the pedestrian W can be continued. In this way, traveling of the vehicle 3 by safe driving support can be executed.

  In the case of notification for displaying the mark M indicating the presence of the pedestrian W on the screen 6a, the mark M indicating the pedestrian W is displayed until the predetermined number N is reached. The driver will drive while recognizing that there is a pedestrian W in the travel attention area Ad. Then, when a predetermined number N or more of travel attention notifications are received, the travel attention notification from the pedestrian terminal device 2 is not transmitted in response to the inter-pedestrian communication transmission stop notification transmitted in that case, and many marks M disappear. Even in this case, for example, only one mark M is left, or as shown in FIG. 6B, the driving attention area Ad is displayed in a conspicuous color at the time of the first reception. It is possible to prevent the alerting from being impaired. Thus, the troublesomeness for the driver can be eliminated by suppressing excessive notification to the driver when there are many pedestrians W in the travel attention area Ad.

  Further, since the pedestrian terminal device 2 is required to be miniaturized to facilitate carrying, the battery 2a is also required to be miniaturized. When the battery 2a having a small capacity is used in accordance with the miniaturization, continuing the transmission state of the communication between the pedestrians that consumes a relatively large amount of power consumes the remaining amount of the battery 2a. On the other hand, when the travel attention notifications from a large number of pedestrian terminal devices 2 are received, transmission of these pedestrian terminal devices 2 is stopped, so that useless power consumption of the pedestrian terminal device 2 can be suppressed. . When the driver receives a large number of travel notices, the driver can fully recognize that there are a large number of pedestrians W in the travel attention area Ad. Even if the transmission of the notification is stopped, it is possible to continue traveling with attention to the pedestrian W without any problem as described above. In this way, driving corresponding to safe driving support can be performed, and the power consumption of the battery 2a in the pedestrian terminal device 2 can be improved.

  FIG. 7 is a sequence diagram in the second embodiment. The second embodiment is similar to the first embodiment in that the inter-pedestrian communication stop notification is transmitted when a driving attention notification is received from the predetermined number N or more of the pedestrian terminal devices 2, but the specific example This is a case in which no pedestrian communication stop notification is transmitted to pedestrians (for example, W1 and W2). In the illustrated example, two (two) pedestrian terminal devices 2 are targeted, but this is an example. When N is two or more, at least one preset number (<N) is set. In addition, about the part similar to the above, the same code | symbol is attached | subjected and the detailed description is abbreviate | omitted.

  The specific pedestrians (W1, W2) may be, for example, in the order of being located closer to the vehicle 3. As shown in FIG. 4, when the pedestrians W1,..., Wn in the travel attention area Ad are close to the vehicle 3 in this order with respect to the traveling direction of the vehicle 3, the vehicle 3 Two pedestrians W1 and W2 are selected from the closest one. In this case, since there is a high possibility that the two pedestrians W1 and W2 will encounter the vehicle 3 for the first time, the transmission of the driving caution notice from the two pedestrians W1 and W2 is maintained. For example, by displaying the mark M representing the pedestrians W1 and W2 on the screen 6a by blinking or the like, it is possible to emphasize attention to the pedestrians W1 and W2 that are likely to encounter first.

  In addition, a predetermined number of pedestrian terminal devices 2 may remain ON in the order in which the in-vehicle terminal device 4 receives the travel attention notification. When the vehicle 3 approaches the travel caution area Ad, only the travel caution notification from the pedestrians W1 and W2 is received by the in-vehicle terminal device 4, and then the travel caution notification from other pedestrians is received and a predetermined number N or more. If it becomes, the two pedestrians W1 and W2 received earlier are selected. The notification may be the same as described above. In this case, for example, a case may be considered in which a pedestrian W other than the two pedestrians W1 and W2 is walking in a store or other sidewalk and enters the travel attention area Ad later. In such a case, the other pedestrians W have just entered the driving attention area Ad, and the two pedestrians W1 and W2 that have been moving from the beginning move within the driving attention area Ad, and approach the roadway 8, for example. Therefore, it is possible to cope with such pedestrians W1 and W2.

  Moreover, you may leave the predetermined number of pedestrian terminal devices 2 with much remaining battery 2a of the pedestrian terminal device 2 ON. If the low-capacity battery 2a is used with priority given to portability, if the inter-step communication is continuously transmitted for a long time, the remaining amount of the battery 2a is rapidly reduced. When there are a large number of pedestrians W, it is not necessary to transmit a driving caution notice from all the pedestrian terminal devices 2, and the driver of the vehicle 3 that has received only a part of the transmission will receive a driving caution area. It can be recognized that there is a pedestrian W in Ad. Thereby, the battery 2a of the pedestrian terminal device 2 in a state where the battery 2a is relatively free can be made to last longer. In addition, the remaining amount of the battery 2a may be determined by the remaining battery amount determination unit 26, and the remaining battery amount information may be included in the pedestrian information and transmitted. The in-vehicle terminal device 4 that has received the pedestrian information selects the pedestrian terminal device 2 having a remaining battery level equal to or greater than a predetermined value, and maintains the transmission of the travel caution notice from the pedestrian terminal device 2.

  Moreover, it is good also considering only the pedestrian terminal device 2 located in the advancing direction of the vehicle 3 as the above-mentioned selection target pedestrian. When the vehicle 3 travels to the position indicated by the two-dot chain line in FIG. 4, the pedestrian W1 is not positioned in the traveling direction of the vehicle 3. Such a pedestrian W1 may be located in the travel caution area Ad or may be excluded from the target of attention in the progress of the vehicle 3. Therefore, the specific pedestrian selection target is the pedestrian W2. , W3,..., Wn. It is good to perform the selection process mentioned above out of those pedestrians W2, ..., Wn. For example, when the pedestrian terminal device 2 that is turned on is a pedestrian W1, wasteful power is consumed when the transmission ON state is maintained even if the vehicle 3 passes, whereas the vehicle 3 By not being positioned in the traveling direction, it can be excluded from the target of transmission ON. By incorporating a program that stops transmission in such a case in the pedestrian terminal device 2, wasteful consumption of the battery 2a can be suppressed.

  Moreover, it is good also considering the pedestrian made into the above-mentioned selection object as the case where the pedestrian terminal devices 2 are within the predetermined distance. For example, in FIG. 4, there is no other pedestrian terminal device 2 between the pedestrian W3 and the pedestrian Wn, and the distance L between the pedestrian W3 and the pedestrian Wn is a predetermined distance (Ld) or more. When away (L> Ld), transmission ON / OFF is selected only for pedestrians W1, W2, and W3. In this way, for example, even when selecting from the vehicle 3 in order of proximity, the pedestrian Wn can be kept on without being turned off. Since the pedestrian Wn is away from the mass of other pedestrians W1, W2, and W3, by maintaining the transmission ON, the driver of the vehicle 3 can surely recognize the presence of the pedestrian Wn. Safe driving support can be reliably performed.

  Further, as a specific pedestrian W that does not transmit the inter-pedestrian communication stop notification, the pedestrian terminal device 2 having a past pop-out history is recorded in the pedestrian terminal device 2 so as to record the pop-out history to the roadway 8. Should not be turned off.

  In addition, it is good to perform combining each selection when not transmitting the above-mentioned communication between steps in 2nd Example. Thereby, the transmission stop process suitable for the situation can be performed.

  Next, a third embodiment will be described with reference to FIGS. FIG. 8 is a diagram illustrating a positional relationship between the vehicle 3 and the pedestrian W that have passed through the travel attention area Ad. FIG. 9 is a sequence diagram in the third embodiment. In addition, about the part similar to the above, the same code | symbol is attached | subjected and the detailed description is abbreviate | omitted.

  In the third embodiment, as shown in FIG. 8, the vehicle 3 has passed through a portion corresponding to the travel attention area Ad on the roadway 8. Thus, when the vehicle 3 has passed the travel attention area Ad, each pedestrian W in the travel attention area Ad transmits a travel attention notification to the vehicle 3 that has passed and driven It is not necessary to call attention to the person.

  A control procedure in the third embodiment will be described with reference to FIG. First, as in the first embodiment, when a predetermined number or more of driving attention notifications transmitted from the pedestrian W in the driving attention area Ad are received, an inter-pedal communication stop notification is transmitted from the vehicle 3, and The pedestrian terminal device 2 (W1,..., Wn in the illustrated example) stops the transmission of inter-pedal communication (OFF).

  As shown in FIG. 8, when the vehicle 3 passes through the travel attention area Ad and all the pedestrians W are no longer located in the traveling direction of the vehicle 3, the pedestrians W are separated from the vehicle 3. Since it is excluded from the notification of the stop of communication between steps, for example, vehicle information including the notification of start of communication between steps is transmitted by inter-step communication in order to return to a normal state in which a notice of travel is given to the following vehicle. The vehicle information includes the identification ID of each pedestrian terminal device 2 that has transmitted the travel attention notice, and the corresponding pedestrian terminal device 2 can receive the vehicle ID.

  In each pedestrian terminal device 2 of each pedestrian W that has received the vehicle information including the inter-pedestrian communication start notification, transmission of inter-pedal communication is started (ON). In the illustrated example, all pedestrians W are targeted. In this case, the transmission of the inter-pedestrian communication start notification from the vehicle 3 is transmitted from the travel attention area Ad to a predetermined area (based on the vehicle position information with respect to the travel attention area Ad in the map information of the car navigation 6). The distance may be determined by determining that the vehicle 3 has left. Moreover, it determines with having passed the predetermined area | region (distance) from each with respect to each pedestrian terminal device 2 (it can determine based on own vehicle position information and the received pedestrian position information), and transmits sequentially. You may make it do.

  Next, a fourth embodiment will be described with reference to FIGS. FIG. 10 shows the positional relationship between the vehicle 3 and the pedestrian W when the pedestrians W1 and W2 are located outside the travel attention area Ad, and other pedestrians W3,. FIG. FIG. 11 is a sequence diagram in the fourth embodiment. In addition, about the part similar to the above, the same code | symbol is attached | subjected and the detailed description is abbreviate | omitted.

  In the fourth embodiment, the vehicle 3 approaches with the pedestrians W1,..., Wn in the travel attention area Ad, and then the pedestrians W1 and W2 are indicated by broken arrows in FIG. This is a case where the vehicle is not in the travel attention area Ad. First, in the same manner as in the first embodiment, when a predetermined number or more of driving attention notifications transmitted from each pedestrian W are received, an inter-pedestrian communication stop notification is transmitted from the vehicle 3, and the target pedestrian terminal device 2 ( In the illustrated example, transmission of inter-pedal communication is stopped (OFF) in W1,..., Wn).

  Thereafter, the pedestrians W1 and W2 are removed from the travel attention area Ad. In the pedestrians W1 and W2 that are out of the travel attention area Ad, the necessity of calling attention to the vehicle 3 traveling on the road 8 is reduced. For example, in order to determine the departure from the travel attention area Ad based on the map information and the pedestrian position information by the own pedestrian terminal device 2 and to inform the existence of the other vehicle, “Outside Ad” is shown in FIG. As shown, the transmission of communication between pedestrians is resumed (ON). Thereby, the pedestrians W3,..., Wn to be recognized by the vehicle 3 improve the power saving of the pedestrian terminal device 2 by stopping transmission of communication between pedestrians and call attention to other vehicles. The pedestrian terminal devices 2 of the pedestrians W1 and W2 who have become can resume communication between pedestrians themselves and can respond to appropriate safe driving support.

  The scenes other than the travel attention area Ad are not limited to moving to different roads in the illustrated example. For example, when crossing a pedestrian bridge or crossing a pedestrian crossing with a green light (in this case) It can be confirmed by inter-pedal communication with an inter-pedal communication terminal provided on the traffic light.

  Next, a fifth embodiment will be described with reference to FIGS. FIG. 12 is a diagram illustrating the positional relationship between the pedestrian W and the vehicle 3a that has traveled in the lane 8a on the travel attention area Ad side and the vehicle 3b that travels in the opposite lane 8b. FIG. 13 is a sequence diagram in the fifth embodiment. In addition, about the part similar to the above, the same code | symbol is attached | subjected and the detailed description is abbreviate | omitted.

  FIG. 12 shows a case where the vehicle 3a that has traveled on the lane 8a on the travel attention area Ad side passes through the travel attention area Ad in the state where the pedestrian W is in the travel attention area Ad as in the third embodiment. Moreover, the case where the notification of stop communication between steps is transmitted from the vehicle 3b which has traveled on the opposite lane 8b is shown. In this case, as in the third embodiment, first, in the vehicle 3a in the lane 8a, as shown in FIG. 13, an inter-pedal communication stop notification is transmitted as the vehicle travels, and after passing through the travel caution area Ad, A communication start notification is transmitted.

  On the other hand, in the example shown in FIG. 13 in the fifth embodiment, the vehicle 3b has entered the inter-pedal communication area 42 before the inter-pedal communication stop notification is transmitted from the vehicle 3a. As a result, the pedestrian terminal device 2 recognizes that a plurality of vehicles are in the inter-pedestrian communication area 42, and sequentially sends a caution notice for traveling to the vehicle 3 b as shown by the two-dot chain line in FIG. 13. The Then, similarly to the above-described embodiment, when the vehicle 3a receives a predetermined number N or more of travel attention notifications, an inter-pedal communication stop notification is transmitted from the vehicle 3a. At that time, if the pedestrian terminal device 2 has not yet received the inter-pedal communication stop notification from the vehicle 3b in the inter-pedal communication area 42, the inter-pedal communication stop notification only from the vehicle 3a. Do not stop inter-vehicle communication due to. As a result, the vehicle 3b continues to recognize that a predetermined number N or more of driving attention notifications have not been received, that is, there is a pedestrian W that should be careful of traveling, and the safety of the pedestrian W is ensured. .

  Also, in the vehicle 3b, when a notice of traveling attention of a predetermined number N or more is received, it becomes possible to sufficiently recognize that a large number of pedestrians W are in the traveling attention area Ad. An inter-pedestrian communication stop notification is transmitted as indicated by the two-dot chain line arrow from the vehicle 3b to the pedestrian W. In this case, the pedestrian terminal device 2 has received inter-pedal communication stop notifications from all the vehicles 3a and 3b in the inter-pedal communication area 42, and for the first time as shown in FIG. Stop communication. Thereby, it is possible to avoid troublesomeness caused by a large number of notifications in each of the vehicles 3a and 3b as described above. Further, power saving of the pedestrian terminal device 2 can be improved also on the pedestrian W side.

  Thereafter, the vehicle 3a goes out of the portion corresponding to the travel attention area Ad and receives the inter-pedestrian communication start notification transmitted from the vehicle 3a, whereby each inter-pedestrian terminal device 2 that has stopped inter-pedal communication. Resumes inter-pedal communication. This restart is performed by receiving an inter-pedestrian communication start notification from one of the vehicles 3a and 3b, and when an inter-pedal communication stop notification from the vehicle 3b is received prior to the vehicle 3a (2 in FIG. 13). The same applies to the dotted line). In the fifth embodiment, the vehicle 3b traveling on the opposite lane 8b is taken as an example, but the same applies to the case where another vehicle 3c (see FIG. 12) travels on the same lane 8a. it can.

  Next, a sixth embodiment will be described with reference to FIGS. FIG. 14 is a diagram illustrating a positional relationship between the vehicle 3 and the pedestrian W when the pedestrian W is located in the safety zone As. FIG. 15 is a sequence diagram in the sixth embodiment. In addition, about the part similar to the above, the same code | symbol is attached | subjected and the detailed description is abbreviate | omitted.

  In the sixth embodiment, the pedestrians W1 and W2 are located in the safety zone As (see FIG. 14) where the vehicle is closed, and the pedestrians W3,..., Wn are in the travel caution area Ad. This is the case when 3 approaches. First, in the same manner as in the first embodiment, when a predetermined number or more of driving attention notifications transmitted from each pedestrian W are received, an inter-pedestrian communication stop notification is transmitted from the vehicle 3, and the target pedestrian terminal device 2 ( In the illustrated example, transmission of inter-pedal communication is stopped (OFF) in W3,..., Wn).

  In the pedestrians W1 and W2 in the safety zone As, there is no need to call attention to the vehicle 3 traveling on the roadway 8. As illustrated in FIG. 15, the pedestrian terminal device 2 of the pedestrians W1 and W2 does not transmit a travel caution notice when it is determined that the pedestrian terminal device 2 is located in the safety zone As based on the map information and the pedestrian position information. Therefore, in the vehicle 3, by receiving a predetermined number N or more of caution notices from the pedestrians W3,..., Wn in the caution area Ad, the pedestrians W3, ..., the inter-pedestrian communication stop notification in a form that Wn can refer to is transmitted.

  Thereby, the pedestrian terminal device 2 of the pedestrians W1 and W2 in the safety zone As can avoid the consumption of the battery 2a due to transmission of useless inter-vehicle communication, and can extend the battery 2a for a long time.

  Although the present invention has been described with reference to the preferred embodiments, the present invention is not limited to such embodiments and can be easily understood by those skilled in the art. It is possible to make appropriate changes without departing from For example, in the above-described embodiment, the description has been given from the state in which the travel attention notification is transmitted from the pedestrian terminal device 2 determined to be located in the travel attention area Ad, but by receiving the inter-vehicle communication from the vehicle 3, It is preferable to determine whether or not the own position is in the travel attention area Ad, and to transmit the travel attention notification only when it is determined to be in the travel attention area Ad. As a result, it is possible to eliminate the waste of transmitting a travel warning notice even when the vehicle 3 is sufficiently separated. Further, all the components shown in the above embodiment are not necessarily essential, and can be appropriately selected without departing from the spirit of the present invention.

  An in-vehicle terminal device according to the present invention, an inter-pedestrian communication system including the same, and an inter-pedal communication stop method include a travel attention notification when the vehicle approaches a travel attention area where the vehicle should travel with caution. The troublesomeness of the driver due to the excess can be eliminated, and the power saving of the pedestrian terminal device can be improved, which is useful for expansion of the inter-pedal communication system.

DESCRIPTION OF SYMBOLS 1 Pedestrian 2 Pedestrian terminal device 3 Vehicle 4 Car-mounted terminal device 5 Portable information terminal 6 Car navigation 6a Screen 21 Position information acquisition part 22 Communication part 25b Map information acquisition part 31 Position information acquisition part 32 Communication part 36a Other terminal information acquisition part 36c Pedestrian number determination unit 36d Transmission stop processing unit 37 Notification unit 38 Deceleration detection unit

Claims (12)

An in-vehicle terminal device mounted on a vehicle for inter-pedestrian communication with a pedestrian terminal device carried by a pedestrian,
An in-vehicle terminal communication unit that receives from the pedestrian terminal device a radio signal including a travel attention notification indicating that the pedestrian terminal device is in a predetermined travel caution area where the vehicle should travel with caution ;
A pedestrian number determination unit that determines whether or not the pedestrian terminal device has a plurality of a predetermined number or more in the travel caution area based on the received travel caution notification ;
A specific pedestrian terminal that forms at least a part of the plurality of pedestrian terminal devices that have transmitted the radio signals when the pedestrian number determination unit determines that the pedestrian terminal device is greater than or equal to the predetermined number. An in-vehicle terminal device comprising: a transmission stop processing unit that causes the in-vehicle terminal communication unit to transmit a transmission stop notification for stopping transmission of inter-vehicle communication to the device. A deceleration detection unit for detecting a deceleration operation of the vehicle;
The transmission stop processing unit, claims when said deceleration of the vehicle is detected by the deceleration detecting unit, wherein the transmission stop notification be transmitted by the vehicle terminal communication unit to the pedestrian terminal device The in-vehicle terminal device according to Item 1 . The transmission stop processing unit, to claim 1, characterized by selecting the self-vehicle position information, the specific pedestrian terminal device on the basis of the pedestrian position information transmitted from the pedestrian terminal device The in-vehicle terminal device described. The wireless signal from the pedestrian terminal device includes battery remaining amount information,
The in-vehicle terminal device according to claim 1, wherein the transmission stop processing unit selects the specific pedestrian terminal device based on the remaining battery amount information. The transmission stop processing unit includes the specific pedestrian terminal device among the pedestrian terminal devices that are within a predetermined distance from each other based on the pedestrian position information transmitted from the plurality of pedestrian terminal devices. The vehicle-mounted terminal device according to claim 1, wherein the vehicle-mounted terminal device is selected. The transmission stop processing unit, when the vehicle has left the predetermined area of the specific pedestrian terminal apparatus according to claim 1, characterized in that transmits a communication start notification by the in-vehicle terminal communication unit In-vehicle terminal device. An inter-pedestrian communication system configured using the in-vehicle terminal device according to any one of claims 1 to 6 and the pedestrian terminal device that performs inter-pedal communication. The pedestrian terminal device
A position information acquisition unit for acquiring pedestrian position information by satellite positioning;
A pedestrian terminal communication unit for receiving a radio signal transmitted from the in-vehicle terminal device,
The pedestrian terminal communication unit receives the transmission stop notification from the in-vehicle terminal communication unit and stops transmission of the inter-pedestrian communication, and then goes out of the travel attention area based on the pedestrian position information. 8. The inter-pedestrian communication system according to claim 7 , wherein when it is determined, transmission of the inter-pedal communication is resumed. The pedestrian terminal device
A pedestrian terminal communication unit that receives a radio signal transmitted from the in-vehicle terminal device,
The pedestrian terminal communication unit stops transmission of the inter-pedestrian communication only when the transmission stop notification is included in all the radio signals received from the plurality of in-vehicle terminal devices. The inter-vehicle communication system according to claim 7 . The pedestrian terminal communication unit resumes transmission of the inter-pedal communication when receiving a transmission start notification from any of the plurality of in-vehicle terminal devices after stopping the transmission of the inter-pedal communication. The inter-pedal communication system according to claim 9 . The pedestrian terminal device
A pedestrian terminal communication unit that receives a radio signal transmitted from the in-vehicle terminal device;
A position information acquisition unit for acquiring pedestrian position information by satellite positioning;
A map information acquisition unit that acquires map information including a safety zone in which traveling of vehicles is prohibited,
The pedestrian terminal communication unit stops transmission of the inter-pedestrian communication while it is determined that the pedestrian is in the safety zone based on the pedestrian position information and the map information. The inter-pedal communication system according to claim 7 . A method for stopping inter-pedal communication of an in-vehicle terminal device mounted on a vehicle in order to perform inter-pedal communication with a pedestrian terminal device carried by a pedestrian,
A radio signal including a travel attention notification indicating that the pedestrian terminal device is in a predetermined travel caution area where the vehicle should travel with caution is received from the pedestrian terminal device ,
Based on the received notice of travel attention, it is determined whether or not the pedestrian terminal device is a plurality of a predetermined number or more in the travel attention area ,
Inter-pedal communication with respect to a specific pedestrian terminal device that forms at least a part of the plurality of pedestrian terminal devices that have transmitted the wireless signals when it is determined that the predetermined number or more of the pedestrian terminal devices are present A method for stopping inter-pedal communication characterized by transmitting a transmission stop notification for stopping transmission of the vehicle.

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