JP5139126B2 - Inter-vehicle communication system, in-vehicle communication device and portable communication device - Google Patents

Description

  The present invention relates to a technology for performing inter-vehicle communication between vehicles and between vehicles and between vehicles using a wireless communication device installed in a vehicle and a wireless device installed in a mobile phone.

Preventive safety technology to prevent accidents from occurring by notifying drivers and pedestrians of approaching vehicles by wirelessly communicating data on vehicle running conditions between vehicles and between vehicles and pedestrians. Consideration is ongoing. For example, Patent Document 1 discloses a technique related to this.
In Patent Literature 1, the in-vehicle wireless communication device determines the risk from the position of the host vehicle specified using a GPS (Global Positioning System) receiver and the pedestrian GPS information received from the wireless communication device carried by the pedestrian. Determines and alerts the driver when there is a possibility of danger, and the mobile radio communication device is similarly identified by using the GPS receiver and the vehicle received from the in-vehicle radio communication device. A technique for determining the degree of danger from the GPS information and inducing a pedestrian when there is a possibility of danger is disclosed.

JP 2004-220143 A

The above-mentioned Patent Document 1 is a wireless communication system that performs direct wireless communication between an in-vehicle wireless communication device mounted on a vehicle and a pedestrian portable wireless communication device carried by a pedestrian. In this wireless system, the pedestrian portable wireless communication device calculates the relative distance between the vehicle and the pedestrian from the pedestrian GPS information mounted on the device and the vehicle GPS information received from the vehicle, and determines that the pedestrian is dangerous. That is what arouses it.
However, when the degree of danger is determined based on the relative distance between the vehicle and the pedestrian, there may be many pedestrians around the vehicle. In this case, the information transmitted from the in-vehicle wireless communication device of the vehicle is also given to a pedestrian who is moving in the direction behind the vehicle or away from the vehicle, and unnecessary notification is given to the pedestrian who does not need to be notified. It will be. In addition, since the notification is unnecessary, it is also a problem that the mobile phone wireless communication apparatus consumes unnecessary power.
The present invention directly communicates vehicle travel information and pedestrian position information between vehicles and between vehicle walkers using an in-vehicle wireless communication device mounted on a vehicle and a portable wireless communication device carried by a pedestrian. A wireless communication system, in which a portable wireless communication device receives only necessary vehicle travel information for a pedestrian and transmits pedestrian information including its own position information only when necessary, thereby It aims at minimizing the power consumption of the device and providing information necessary for preventive safety to drivers and pedestrians.

In order to achieve the above object, the inter-vehicle communication system according to the present invention is an inter-vehicle communication system in which an in-vehicle communication device mounted on a vehicle and a portable communication device possessed by a pedestrian wirelessly perform data communication. The apparatus further includes a navigation unit that acquires at least vehicle position information of the mounted vehicle and vehicle travel information including a vehicle ID that identifies the host vehicle communication device, and the vehicle travel information acquired by the navigation unit. Broadcast transmission to a portable communication device possessed by a pedestrian at predetermined time intervals, and specify at least the position information of the pedestrian received from the portable communication device, the position information of the own portable communication device, and the own portable communication device A communication device that outputs pedestrian information including a terminal ID to the navigation unit, and the navigation unit analyzes the pedestrian information and A control unit that detects that a pedestrian carrying the mobile communication device that transmitted the pedestrian information is approaching the host vehicle, and the control unit displays or voices that the pedestrian is approaching the host vehicle. An output unit for outputting is provided.
Further preferably, in the vehicle communication device of the inter-vehicle communication system according to the invention, the vehicle transmitted by the communication device unit when the navigation unit detects that the pedestrian is approaching the host vehicle. The predetermined time interval for transmitting travel information is shortened.
Preferably, the inter-vehicle communication system according to the present invention sets an out-of-sight area in advance, and the vehicle communication device detects that a pedestrian exists in the out-of-sight area by the navigation unit of the vehicle communication device. In this case, the predetermined time interval transmitted by the vehicle travel information transmitted by the communication device unit is shortened.
Preferably, the portable communication device used in the inter-vehicle communication system according to the invention includes a wireless communication unit that receives the vehicle travel information broadcast by the in-vehicle communication device and transmits pedestrian information to the in-vehicle communication device. A position information acquisition unit for acquiring the position information of the mobile phone, and processing the received vehicle travel information to generate pedestrian information from the position information of the mobile phone acquired by the position information acquisition unit and perform transmission control The vehicle information processing unit and the vehicle information processing unit include an output unit that displays or outputs a sound that the vehicle is approaching.
Preferably, the vehicle information processing unit of the mobile communication device used in the inter-vehicle communication system according to the invention transmits the pedestrian information when the vehicle information is received from the in-vehicle communication device.

Moreover, the in-vehicle communication device of the inter-vehicle communication system according to the present invention is the in-vehicle communication device of the inter-vehicle communication system in which the in-vehicle communication device mounted on the vehicle and the portable communication device possessed by the pedestrian perform data communication wirelessly. A pedestrian possesses a navigation unit that acquires vehicle travel information including at least the position information of the host vehicle and the vehicle ID that identifies the host vehicle communication device, and the vehicle travel information acquired by the navigation unit. A pedestrian including at least the position information of the pedestrian, the position information of the own portable communication device, and the terminal ID for identifying the own portable communication device, which are broadcasted to the portable communication device at predetermined time intervals and received from the portable communication device. A communication device that outputs information to the navigation unit, and the navigation unit analyzes the pedestrian information and transmits the pedestrian information. A control unit that detects that a pedestrian carrying a portable communication device is approaching the host vehicle, and an output unit that displays or outputs a sound to indicate that the pedestrian is approaching the host vehicle. It is a thing.
Preferably, in the in-vehicle communication device of the inter-vehicle communication system according to the invention described above, when the navigation unit detects that the pedestrian is approaching the own vehicle, the vehicle traveling transmitted by the communication device unit. The predetermined time interval for transmitting information is shortened.
Also preferably, the in-vehicle communication device of the inter-vehicle communication system according to the present invention sets an out-of-sight area in advance, and when the navigation unit detects that a pedestrian is present in the out-of-sight area, the communication device The predetermined time interval transmitted by the vehicle traveling information transmitted by the unit is shortened.

  According to the present invention, it is possible to provide a device for notifying a driver and a pedestrian of danger at an appropriate time by reducing transmission / reception of unnecessary information as compared with the prior art.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In each figure, components having common functions are denoted by the same reference numerals, and description thereof is avoided as much as possible to avoid duplication.

An embodiment of the inter-vehicle and inter-vehicle communication system of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing a schematic configuration of one embodiment of the inter-vehicle and inter-vehicle communication system of the present invention. Reference numeral 400 denotes a vehicle, 600 denotes a pedestrian A, 500 denotes a portable communication device possessed by the pedestrian A600, and 300 denotes an in-vehicle communication device mounted on the vehicle 400. The mobile communication device 500 may be, for example, a mobile phone device to which necessary functions are added.
In the in-vehicle communication device 300, 100 is a navigation unit equipped with a navigation function or the like for guiding a driver boarding the vehicle 400 to the destination, and 200 is a vehicle traveling that indicates the traveling state of the vehicle 400 in the portable communication device A 500. It is a communication device unit that transmits information and receives pedestrian information indicating the position information and moving direction of the portable communication device A500 possessed by the pedestrian A600. The communication device unit 200 communicates with the mobile communication device A500 wirelessly.

In the navigation unit 100, 101 is a navigation control unit that performs control processing of each unit in the navigation unit 100, 102 is an output unit that outputs sound and displays image information such as a speaker and a monitor, and 103 is a driver that the navigation unit 100 has a purpose. This is an input unit for performing input operations such as setting the ground.
In the communication device unit 200, 201 is a wireless communication unit that transmits vehicle travel information of the host vehicle and receives pedestrian information from the portable communication device A500, and 202 is an antenna used for wireless data transmission / reception of the wireless communication unit 201. , 203 are communication control units for transmitting and receiving data between the wireless communication unit 201 and the navigation unit 100.

In FIG. 1, a pedestrian A600 has a portable communication device A500. The mobile communication device A 500 performs a voice call with another mobile communication device by wireless communication, downloads music and image content data by connecting to the center device, and the communication device unit 200 mounted on a vehicle traveling in the vicinity. Vehicle travel information indicating the travel status of the vehicle between the vehicle and the pedestrian information indicating the position information and the direction of movement of the vehicle is transmitted wirelessly to the vehicle.
Although there are many pedestrians in the communication area of the communication device unit 200 of the vehicle 400, in this embodiment, the vehicle 400 and the pedestrian A600 will be described as a representative.

The navigation control unit 101 performs processing for guiding the driver to the designated destination based on the input information input from the input unit 103. When the driver inputs a destination from the input unit 103, the road information from the current position of the vehicle 400 to the destination is retrieved and the route information of the road on which the vehicle is traveling is displayed on the output unit 102.
While the vehicle 400 is traveling, the navigation control unit 101 displays the traveling position of the host vehicle on a map displayed on the output unit 102, and also provides traveling guidance information by voice to provide the driver with route guidance to the destination. Output to the output unit 102. The navigation control unit 101 also analyzes the pedestrian information from the portable communication device A500 possessed by the surrounding pedestrian A600 received via the communication control unit 203 and outputs the pedestrian information to the output unit 102.

  The output unit 102 is controlled by the navigation control unit 101 to display an image of various types of information such as map information and road congestion information output from the navigation control unit 101, and voice of route guidance information output from the navigation control unit 101. It is composed of a speaker that performs output. Of course, the present invention is not limited to a device or apparatus that displays these images or a device or apparatus that outputs audio information. For example, it may be another device or apparatus for providing information to an operator such as a driver or other passengers, for example, a vibration device or apparatus that notifies attention and warning information by vibration. There may be.

The input unit 103 includes an operation function for inputting various information necessary for the driver to set a destination which is a destination of the vehicle 400 and a predetermined processing operation request to the navigation unit 100. (Keyboard, touch panel input, etc.).
Various information input by the driver through the input unit 103 is output to the navigation control unit 101. Of course, the present invention is not limited to devices or apparatuses used as these input operation panels or devices or apparatuses that output audio information. For example, it may be another device or apparatus that is operated or input in accordance with the change of the operator's intention, action, or biological information, such as a driver or other vehicle occupant. A device or device that can detect and input biometric information including pulse, blood pressure, etc. May be.

  In the embodiment of FIG. 1, the wireless communication unit 201 wirelessly communicates vehicle travel information with the mobile communication device A500 possessed by the pedestrian A600. However, the wireless communication unit 201 is also connected to another vehicle equipped with the in-vehicle communication device 300 traveling around. The vehicle travel information may be communicated wirelessly.

  FIG. 2 is a diagram illustrating an example of an internal configuration of the navigation control unit 101 described in FIG. 1011 is an acceleration sensor for detecting the vehicle speed, 1012 is the location of the vehicle, GPS (Global Positioning System) for acquiring position information, 1013 is a gyro for detecting the traveling direction of the vehicle, and 1014 is for displaying the current location and destination A map information recording unit that records the map information of the vehicle, 1015 is a vehicle information acquisition unit that acquires vehicle travel information related to the travel state, and 1016 is another vehicle travel information storage that stores vehicle travel information related to the travel state received from other vehicles. , 1017 is a pedestrian information storage unit for storing pedestrian information indicating the position information and the moving direction of the portable communication device A500 possessed by the surrounding pedestrian A600, and 1018 is a control unit for controlling the navigation unit 100. .

In FIG. 2, the acceleration sensor 1011 detects the vehicle speed of the host vehicle 400 and outputs an electric signal indicating the detected vehicle speed information to the control unit 1018.
The GPS 1012 obtains current position information of the host vehicle 400 by communicating with a plurality of GPS satellites, and outputs the acquired current position information of the host vehicle 400 to the control unit 1018.
The gyro 1013 detects the traveling direction of the host vehicle 400 and outputs the detected traveling direction information of the host vehicle 400 to the control unit 1018.
The map information recording unit 1014 records map information for displaying the current position of the host vehicle 400, the destination of the host vehicle 400, and the like on the output unit 102 under the control of the control unit 1018. Further, in response to a request from the control unit 1018, the designated map information is output to the control unit 1018.
The vehicle information acquisition unit 1015 acquires operation state information of the host vehicle 400 such as travel speed, engine speed, torque, brake, and accelerator state in response to a request from the control unit 1018, and outputs the information to the control unit 1018. An example of specific vehicle travel information handled by the control unit 1018 will be described with reference to FIG. 5 (described later).

  The control unit 1018 performs various processes described later in response to various information input from the input unit 103 and requests. While the vehicle 400 is traveling, the vehicle speed detection signal from the acceleration sensor 1011, the current position information of the vehicle 400 from the GPS 1012, and the traveling direction information of the vehicle 400 from the gyro 1013 are acquired and recorded in the map information recording unit 1014. The map information around the travel location of the host vehicle is read from the existing map information, and the travel position of the host vehicle 400 is displayed on the output unit 102. The engine speed and torque may be obtained based on a control signal processed by the engine control system or a detection signal detected during control.

  When the driver inputs a destination from the input unit 103 and sets a request for navigation travel to guide the travel to the destination, the control unit 1018 of the navigation control unit 101 travels from the current position to the destination. The route is calculated, and guidance processing by voice and image output is performed to the destination according to the designated route. In addition, the control unit 1018 analyzes vehicle travel information received by the communication device unit 200 from another vehicle, and outputs information on a vehicle traveling in the vicinity to the output unit 102.

  FIG. 3 is a diagram illustrating an example of an internal configuration of the wireless communication unit 201 described in FIG. 2011 is a transmission unit that performs data transmission processing in response to a request from the wireless communication processing unit 2014, 2012 is a reception unit that receives data from the antenna 202, 2013 is a switch for switching between transmission processing and reception processing, and 2014 is a switch 2013. It is a wireless communication processing unit that performs data input / output with the switching process and the transmission unit 2011, the reception unit 2012, and the communication control unit 203.

In FIG. 3, when receiving a data transmission request from the communication control unit 203, the wireless communication processing unit 2014 confirms the usage status of surrounding wireless transmission channels, and when not in use, transmits the transmission data to the transmitting unit 2011. And the switch 2013 is switched to the transmission unit 2011 side to perform data transmission. Also, when surrounding wireless transmission channels are used, transmission is waited to avoid collision of transmission data, and transmission processing is performed after detecting that it has become unused.
When the transmission processing is completed, the wireless communication processing unit 2014 switches the switch 2013 to the receiving unit 2012 side. In addition, when data is received by the receiving unit 2012, the data is transmitted to the communication control unit 203.
The access control method of this wireless communication is called a CSMA / CA (Carrier Sense Multiple Access with Collision Avoidance) method, and is used as an access control method in the MAC (Media Access Control) layer of a wireless LAN (Local Area Network). 11 is standardized.
Here, the case where the CSMA / CA method is adopted as the communication control method is described. However, another communication method control method such as a slotted-ALOHA method that is a time synchronization type may be used.

  FIG. 4 is a diagram illustrating an example of an internal configuration of the communication control unit 203 described with reference to FIG. Reference numeral 2031 denotes a navigation interface unit, 2032 denotes a communication control processing unit that performs data input / output control processing with the wireless communication unit 201 and the navigation unit 100, 2033 denotes a transmission data storage unit, 2034 denotes a reception data storage unit, and 2035 denotes inter-vehicle communication. It is an interface part.

In FIG. 4, the navigation interface unit 2031 inputs and outputs data between the navigation control unit 101 and the communication control unit 203 of the navigation unit 100. The inter-vehicle communication interface unit 2035 inputs and outputs data between the wireless communication unit 201 and the communication control unit 203.
The communication control processing unit 2032 performs data input / output control processing with the navigation unit 100 via the navigation interface unit 2031, and performs data input / output control processing with the wireless communication unit 201 via the vehicle-to-vehicle communication interface unit 2035. Do.
The transmission data storage unit 2033 temporarily stores transmission data requested by the navigation unit 100. The reception data storage unit 2034 temporarily stores reception data received from the wireless communication unit 201.

FIG. 5 is a diagram showing an example of the contents of the vehicle travel information in the present invention. FIG. 5 (a) is a table showing the contents of vehicle travel information transmitted / received between vehicles and transmitted to pedestrians. FIG. 5B shows a data format when vehicle traveling information is transmitted to the communication device unit 200.
In FIG. 5, as the vehicle travel information data item, a vehicle ID (Identification) that is a number identifying the host vehicle, a vehicle type indicating the model of the host vehicle, a latitude indicating a location where the host vehicle is traveling, It is an accelerator indicating the longitude and altitude, the vehicle speed indicating the traveling speed of the host vehicle, the acceleration indicating the traveling acceleration of the host vehicle, the direction indicating the traveling direction of the host vehicle, the brake indicating the brake use state, and the accelerator use state. The amount of data, units, and other contents for each data item are shown in Fig. 5 (a).
In FIG. 5 (a), the contents of the brake and the accelerator are “ON: OFF”, but the information is not limited to the binary information, and depending on the use state of the brake and the accelerator, Information indicating the data amount in stages may be used.
When obtaining the vehicle travel information, the navigation control unit 101 converts the data into the data format shown in FIG. The communication device unit 200 includes vehicle communication information indicating the traveling state of the host vehicle in the communication device unit 200 mounted on a vehicle traveling around and the inter-vehicle wireless communication unit 504 of a portable communication device possessed by a pedestrian in the vicinity. Send.

  FIG. 6 is a diagram illustrating an example of the overall configuration of a mobile communication device A500 that receives travel information from vehicles traveling around and transmits pedestrian information indicating the position information and movement direction of the device itself to surrounding vehicles. is there. Reference numeral 501 denotes an output unit that displays and outputs voice information and image information, 502 denotes an input unit that performs input operations such as voice input and start of data communication, and 503 denotes a voice call with another portable communication device or a wireless communication with a center device. A mobile phone wireless communication unit that performs communication, 504 is an inter-vehicle wireless communication unit that performs wireless communication with a wireless device unit 200 mounted on a vehicle traveling around, and 505 is a vehicle traveling received from a vehicle traveling around A vehicle information processing unit that performs information processing and pedestrian information generation and performs transmission control, 506 is equipped with GPS, a position information acquisition unit that acquires its own position information (for example, latitude and longitude), and 507 is a portable communication device 500 It is a mobile phone control unit that controls the whole.

In FIG. 6, when the pedestrian A600 performs an input operation on the operation unit 502 of the mobile communication device A500, such as voice call or start of data communication connection, the mobile phone control unit 507 performs mobile phone wireless according to the input content. A wireless communication connection processing request is sent to the communication unit 503.
In response to the connection request requested from the mobile phone control unit 507, the mobile phone wireless communication unit 503 performs a wireless communication connection with the request destination, and then outputs a wireless communication connection completion response to the mobile phone control unit 507.
Upon receiving a wireless communication connection completion response from the mobile phone wireless communication unit 503, the mobile phone control unit 507 controls the output unit 501 to display a wireless communication connection notification. Then, according to the input content of pedestrian A600, a voice call or data communication is implemented.
In addition, when an incoming call notification is received from the mobile phone wireless communication unit 503, the output unit 501 is controlled to display an incoming call and notify the pedestrian A600. After that, the mobile phone control unit 507 performs wireless communication connection according to the input content that the pedestrian A600 inputs through the input unit 502.

FIG. 7 is a diagram showing an example of the contents of pedestrian information such as position information and moving direction of the pedestrian A600 transmitted by the mobile communication device A500 of the present invention shown in FIG. 6 to a vehicle traveling around. It is. FIG. 7A is a table showing the contents of pedestrian information transmitted by the pedestrian's mobile communication device. FIG. 7B shows a data format when pedestrian information is transmitted to the communication device unit 200 of the vehicle 400.
The data items include a mobile ID that is a number that identifies the mobile communication device, a latitude and longitude that indicate the location of the mobile communication device, and a direction that indicates the moving direction of the pedestrian. The amount of data, units, and other contents for each data item are shown in Fig. 7 (a).
The vehicle information processing unit 505 acquires pedestrian information such as location and direction from the position information acquisition unit 506, converts the pedestrian information to the pedestrian information data format shown in FIG. 7, and then inter-vehicle wireless communication unit at a predetermined timing. Request transmission to 504. The vehicle-to-vehicle wireless communication unit 504 establishes wireless communication connection with the wireless device unit 200 mounted on a vehicle traveling in the vicinity, and transmits the pedestrian information acquired by the self-portable communication device A500.

  FIG. 8 is a vehicle pedestrian layout diagram illustrating an embodiment in which the vehicle 400 performs wireless communication with surrounding vehicles and pedestrians. 510 is a portable communication device B having the same configuration and functions as the portable communication device A500, 610 is a pedestrian B carrying the portable communication device B510, and 800 is a wireless communication unit of the in-vehicle wireless device 300 mounted on the vehicle 400. 201, a communication area A that is communicable with the vehicle-to-vehicle wireless communication unit 504 installed in the portable communication device A500 and the portable communication device B510. 810 is an s point that is the current position of the vehicle 400 that is running, 820 is an u point that is the current position of the walking pedestrian A600, and 830 is an x point that is the current position of the walking pedestrian B610. is there.

In FIG. 8, the in-vehicle communication device 300 of the vehicle 400 gives the traveling information of the host vehicle to the portable communication device A500 possessed by the pedestrian A600 existing in the communication area A800 and the portable communication device B510 possessed by the pedestrian B610. Broadcast regularly.
When the mobile communication device A500 and the mobile communication device B510 each receive the travel information from the vehicle 400, the mobile communication device A500 indicates the mobile ID, the position of the pedestrian, and the pedestrian according to the input of the pedestrian A600. Broadcast information wirelessly. Similarly, the mobile communication device B510 receives travel information from the vehicle 400 and makes a call connection with the vehicle 400 in response to an input from the pedestrian B610, and wirelessly transmits its pedestrian information.
If the in-vehicle communication device A500 detects from the pedestrian information received from the portable communication devices A500 and B510 that the pedestrian is approaching the vehicle, the in-vehicle communication device A500 notifies the driver of that fact (displayed on a display or the like). . In the case of FIG. 8, the navigation unit 100 of the vehicle 400 ignores the information on the pedestrian B610 because the pedestrian B610 is moving away from the traveling direction of the host vehicle 400. However, since pedestrian A600 is moving in a direction approaching the traveling direction of host vehicle 400, it is determined that pedestrian A600 is approaching host vehicle 400, and the driver is notified.

9 shows a vehicle 400, a pedestrian A600, and a pedestrian B610 that were moving in FIG. 8, and an example of a position and a communication area after a predetermined time (for example, p [s]) has elapsed. It is a pedestrian arrangement drawing. 900 can communicate with the wireless communication unit 201 of the in-vehicle wireless device 300 mounted on the vehicle 400 at a position after the elapse of a predetermined time, and the inter-vehicle wireless communication unit 504 mounted on the mobile communication device A500 and the mobile communication device B510. It is the communication area B that is in a state. 910 is a current t point of the traveling vehicle 400, 920 is a v point that is the current position of the walking pedestrian A600, and 930 is a y point that is the current position of the walking pedestrian B610.
In FIG. 9, when p [s] has elapsed, the vehicle 400 and the pedestrian A600 are moving closer to each other, and there is a greater possibility of a collision. On the other hand, as seen from the vehicle 400, the pedestrian B610 is moving in the direction of moving away, as before. Note that p is a natural number.

FIG. 10 is a sequence diagram of an embodiment when the vehicle 400 and the portable communication device A500 possessed by the pedestrian A600 transmit and receive vehicle travel information and pedestrian information. The direction in which the time elapses is the direction of progressing from the top to the bottom in FIG.
In FIG. 10, the vehicle 400 performs a vehicle travel information transmission process S1001 during travel. In this case, the vehicle 400 broadcasts the vehicle travel information S101 at time m0, and after that, periodically broadcasts at m [s] intervals. At time m0 and time m1 after m [s], there is no pedestrian's portable communication device A500 that receives the vehicle travel information S101, S102 in the communication area. That is, all the mobile communication devices A500 are outside the communication area. Note that m is a natural number.
However, at time m2 after m [s], the vehicle travel information S103 transmitted by the communication device unit 200 of the vehicle 400 is received by the portable communication device A500 possessed by the pedestrian A600 that has entered the communication area. . The mobile communication device A500 that has received the vehicle travel information S103 transmits the pedestrian information W101 to the communication device unit 200 of the vehicle 400 as a reception response at the time w1 as in the embodiment described with reference to FIG. 6 (S1002).

In addition, when the pedestrian A600 does not intend to change the pedestrian information, the mobile communication device A500 uses information at the time (for example, walking) at a predetermined time interval (for example, t [s] interval). (S1003). And if it is outside the communication area of the vehicle 400, transmission of pedestrian information is stopped (S1004). Moreover, pedestrian information is updated by inputting the intention that the pedestrian A600 makes a right turn into the mobile communication device A500, and transmission is continued at predetermined time intervals. Note that t is a natural number.
The traveling direction of the pedestrian may be input to the mobile communication device A500 by the pedestrian A600 itself, or the mobile communication device A500 automatically detects the moving direction and speed of the pedestrian, such as a gyro or an acceleration sensor. The pedestrian information may be automatically updated.

  The navigation control unit 101 of the navigation unit 100 of the vehicle 400 that has received the pedestrian information W101 analyzes the received pedestrian information W101 and displays it on the output unit 102.

  The vehicle 400 that has received the pedestrian information W101, W102 after the predetermined time interval (for example, t [s] interval), etc., analyzes the pedestrian information received by the navigation unit 100, and is in danger. If it is determined that there is no normal vehicle travel information S104 (time m3), S105 (time m4), S106 (time m5), S107 (time m6), S108 (time m7),. Continue sending until you reach the destination you entered.

FIG. 11 is a flowchart for explaining an embodiment of application processing in which the navigation control unit 101 of the navigation unit 100 according to the present invention transmits / receives vehicle travel information and pedestrian information to / from other vehicles and portable communication devices.
In step S1101, it is determined whether pedestrian information has been received. When pedestrian information is received, the process proceeds to step S1102, and when not received, the process proceeds to step S1103.
In step S1102, pedestrian information reception processing in FIG. 12 (described later) is executed, and the process proceeds to step S1103.

In step S1103, it is determined whether emergency vehicle travel information is to be transmitted to mobile communication device A500 of pedestrian A600 that has received pedestrian information as vehicle travel information reception notification. When it is determined that urgent vehicle travel information is to be transmitted, the process proceeds to step S1104, and when it is determined to be no, the process proceeds to step S1105.
In step S1104, when vehicle travel information is received from a vehicle traveling around the host vehicle, it is displayed that there is a nearby vehicle approaching the output unit 102 of the navigation unit 100 of the host vehicle, and then step S1105. The process is transferred to.

In step S1105, the navigation control unit 101 determines whether or not a predetermined time set in advance has passed by a vehicle travel information update cycle timer of the host vehicle counted by a clock signal or the like. When it is determined that a predetermined time (for example, m [s] in FIG. 10) has elapsed, the process proceeds to step S1106, and when it is determined to be no, the process of FIG. 11 ends.
In step S1106, the vehicle travel information in FIG. 13 (described later) is updated, and the process in FIG. 11 ends.
Note that the timer end confirmation in step S1105 does not necessarily have to be performed in this processing procedure, and may be a processing procedure in which vehicle travel information is updated and transmitted every predetermined time.

FIG. 12 is a flowchart for explaining an embodiment of the processing operation when pedestrian information is received from portable communication device A500 in the application processing of navigation control unit 101 of the present invention. The flowchart in FIG. 12 is an example of the process in step S1102 of the flowchart described in FIG.
When the process of step S1102 is started, in step S1201, the pedestrian information received in the pedestrian information storage unit S1017 is stored. Next, in step S1202, the distance from the host vehicle 400 is calculated from the position and direction information of the pedestrian A600, and the process proceeds to step S1203.

In step S1203, it is determined whether or not the distance between the host vehicle 400 and the pedestrian A600 is closer than when the previous pedestrian information was acquired. When it determines with approaching from the last time, it transfers a process to step S1204, and when it determines with no, it transfers a process to step S1209.
In step S1204, it is determined whether or not the traveling direction of the pedestrian A600 is a direction approaching the host vehicle 400. When it is determined that the direction is approaching, the process proceeds to step S1205, and when it is determined not, the process proceeds to step S1209.

In step S1205, the ID of the mobile communication device A500 of the approaching pedestrian A600 is checked to determine whether the ID has already been output to the output unit 102 or not. If the ID has already been output to the output unit 102, the process proceeds to step S1207, and if not, the process proceeds to step S1206.
In step S1206, the output unit 102 is controlled to perform an output for warning that the pedestrian A600 is approaching, and the traveling position is displayed together with the map information (a display example is shown in FIG. 17). The process proceeds to step S1103 in FIG.
In step S1207, compared to the data in the pedestrian information storage unit 1017, whether or not the pedestrian information received this time has updated content from the pedestrian information of the portable communication device A500 possessed by the pedestrian A600 received last time. Determine. When there is update data, the process proceeds to step S1208, and when it is determined that there is no update data, the process proceeds to step S1103 in FIG. In step S1208, a process for redisplaying the updated portion (for example, the traveling position of the host vehicle and the surrounding vehicles) is performed on the output unit 102.

In step S1209, it is determined whether information indicating that the pedestrian is approaching is being output. If it is being output, the process proceeds to step S1210. If not, the process proceeds to step S1103 in FIG.
In step S1210, the output unit 102 is controlled to end displaying the pedestrian approaching information being displayed, and the process proceeds to step S1103 in FIG.

FIG. 13 is a flowchart for explaining the transmission vehicle travel information update process in the application process of the navigation control unit 101. The flowchart in FIG. 13 is an example of the processing in step 1106 of the flowchart described in FIG.
When the processing of step 1106 is started, in step 1301, as described with reference to FIG. 2, for example, the own vehicle as described with reference to FIG. 5 is obtained from the acceleration sensor 1011, GPS 1012, gyro 1013, vehicle information acquisition unit 1015, and the like. Vehicle travel information is acquired, stored in the vehicle information storage unit 1015, and the process proceeds to step S1302.
In step S1302, an update request for vehicle update information is output to the communication control unit 203 of the communication device unit 200, and the process proceeds to step S1303.
In step S1303, the host vehicle travel information update cycle timer is restarted, and the processing in FIG. 13 and the processing in FIG. 11 are terminated.

FIG. 14 is a flowchart for explaining an embodiment of the control process of the communication control unit 203 of the communication apparatus unit 200 according to the present invention. In the example of FIG. 14, the communication control unit 203 performs data reception processing from the wireless communication unit 201 of the communication device unit 200, vehicle travel information update notification processing from the navigation unit 100, and vehicle travel information transmission request processing. Do.
When the communication control unit 203 of the communication device unit 200 of the vehicle 400 starts processing, in step S1401, it is determined whether data is received from the wireless communication unit 201 of the communication device unit 200. When data is received, the process proceeds to step S1402, and when no, the process proceeds to step S1403.
In step S1402, the communication control unit 203 performs a data reception process shown in FIG. 15 (described later), and the process proceeds to step S1403.

In step S1403, it is determined whether there is a request for updating the vehicle travel information of the host vehicle from the navigation unit 100. If there is a request for updating the vehicle travel information, the process proceeds to step S1404, and if not, the process proceeds to step S1405.
In step S1404, the vehicle travel information received from the navigation unit 100 is stored in the transmission data storage unit 2033, the vehicle travel information update process is executed, and the process proceeds to step S1405.

In step S1405, it is determined by a vehicle travel information update cycle timer of the host vehicle counted by a clock signal or the like whether a predetermined time set in advance has elapsed. When it is determined that a predetermined time (for example, m [s] in FIG. 10) has elapsed, the process proceeds to step S1408, and when it is determined to be no, the process of FIG.
In step S1408, transmission data is set in the wireless communication unit 201, and the process proceeds to step S1410.
In step S1410, the transmission cycle timer is restarted and the processing in FIG. 14 is terminated.

FIG. 15 is a flowchart for explaining details of an embodiment of the data reception process of the communication control unit 203 of the present invention. The flowchart in FIG. 15 is an example of the processing operation in step S1402 of the flowchart described in FIG.
When the process of step S1402 is started, it is determined in step S1501 whether or not there is received data in the received data storage unit 2034. When the received data is stored in the received data storage unit 2034, the process proceeds to step S1502, and when the received data is not stored, the process proceeds to step S1403 in FIG.

In step S1502, it is determined whether the reception data stored in the reception data storage unit 2034 is not newly received data but already received data. When it is determined that the received data has already been received, the process proceeds to step S1503, the received data is discarded, and the process proceeds to step S1403 in FIG. When it is determined that the received data is newly received, the process proceeds to step S1504.
In step S1504, the received data is stored in the received data storage unit 2034, the received data is further output to the navigation unit 100, and the process proceeds to step S1403 in FIG.

FIG. 16 is a flowchart for explaining an embodiment of the inter-vehicle communication processing operation in the vehicle information processing unit 505 of the mobile communication device A500 of the present invention.
In step S1601, it is determined whether the inter-vehicle wireless communication unit 504 has received data. When received, the process proceeds to step S1602, and when not received, the process proceeds to step S1611.

In step S1602, the state of the inter-vehicle wireless communication unit 504 is set during communication, and the process proceeds to step S1603.
In step S1603, it is determined whether the data received by the inter-vehicle wireless communication unit 504 is newly received data or already received data. If it is determined that the received data has already been received, the process proceeds to step S1604. If it is determined that the received data is newly received, the process proceeds to step S1605.
In step S1604, the received data that has already been received is discarded, and the process of the flowchart of FIG. 16 ends.
In step S1605, the vehicle travel information of the transmission source vehicle is analyzed from the received data, the distance to the vehicle is calculated, stored in the position information acquisition unit 506, and the process proceeds to step S1606.

In step S1606, the distance between the corresponding vehicle stored in the position information acquisition unit 506 and the previously calculated distance is compared with the distance calculated from the vehicle travel information received this time, and the distance when the distance to the vehicle was previously acquired is compared. It is determined whether or not it is closer. When it is determined that the distance is closer than the previous acquisition, the process proceeds to step S1607, and when it is determined not, the process proceeds to step S1609.
In step S1607, it is determined whether the traveling direction of the vehicle is a direction approaching a pedestrian. When it is determined that the traveling direction of the vehicle is a direction approaching a pedestrian, the process proceeds to step S1608, and when it is determined NO, the process proceeds to step S1609.
In step S1608, the output unit 501 of the mobile communication device A500 is controlled to output a warning that informs the pedestrian A600 carrying the mobile communication device A500 that the vehicle is approaching.

In step S1609, it is determined whether or not the pedestrian information transmission cycle timer of portable communication device A500 has started. When it is determined that the start has been started, the process proceeds to step S1613, and when it is determined not, the process proceeds to step S1610.
In step S1610, activation of a pedestrian information transmission cycle timer is started, and the process proceeds to step S1613.
In step S1611, it is determined whether or not data has been received for a certain period of time. If there is no data, the process proceeds to step S1612. If there is received data, the process proceeds to step S1613.
In step S1612, in response to the absence of data reception for a certain period, the communication state of the vehicle-to-vehicle wireless unit 504 is set to the communication disconnected state, and then the process proceeds to step S1613.

  In step S1613, it is determined by a pedestrian information transmission cycle timer of portable communication device A500 counted by a clock signal or the like whether a predetermined time set in advance has elapsed. When it is determined that a predetermined time (for example, t [s] in FIG. 10) has elapsed, the process proceeds to step S1614. When it is determined that the predetermined time has not elapsed, the process of the flowchart in FIG.

In step S1614, it is determined whether or not the vehicle-to-vehicle wireless communication unit 504 is set in a communicating state. If it is in a communication state, the process proceeds to step S1615. If it is determined as NO, the process of the flowchart of FIG.
In step S1615, pedestrian information such as location and direction is acquired from the position information acquisition unit 506 of the mobile communication device A500, and the process proceeds to step S1616. In step S1616, after converting into the pedestrian information data format shown in FIG. 7, it transmits from the inter-vehicle wireless communication part 504 at a predetermined timing, and the process proceeds to step S1617. In step S1617, activation of the pedestrian information transmission cycle timer is started, and the processing of the flowchart in FIG.

FIG. 17 shows that the navigation control unit 101 of the navigation unit 100 of the vehicle 400 receives the pedestrian information of the pedestrian A600 who owns the portable communication device A500 from the portable communication device A500, and automatically uses the received pedestrian information. It is a figure which shows one Example when the content which analyzed the pedestrian information is displayed on the display of the output part 102, when the pedestrian approaching a vehicle is detected. Reference numeral 1701 denotes a display A indicating an approaching pedestrian existing on the left of the front intersection.
Thus, since the approaching pedestrian is displayed at the corresponding position on the map together with the road map information on the display of the output unit 102, the passenger such as the driver of the vehicle 400 pays attention to the pedestrian in advance. Can improve safety.

According to the above-described first embodiment, unnecessary pedestrian information is provided to the driver by detecting a pedestrian approaching the own vehicle from a large number of pedestrians present in the vicinity of the host vehicle and notifying the driver. It is possible to provide an in-vehicle communication terminal that is not provided to the user.
That is, when it is detected that a pedestrian approaches the own vehicle, the pedestrian approach information is output to the output unit of the navigation device mounted on the own vehicle.

  In the above embodiment, the unit of the predetermined intervals m and t is [s], but the present invention is not limited to this unit.

  A second embodiment of the inter-vehicle and inter-vehicle communication system of the present invention will be described with reference to FIGS. FIG. 18 is a flowchart for explaining an embodiment of a process for receiving pedestrian information from the mobile communication device A500 in the application process of the navigation control unit 101 of the present invention. The flowchart of FIG. 18 is an example of the process of step S1102 of the flowchart described in FIG. FIG. 19 is a flowchart for explaining an embodiment of the control processing operation of the communication control unit 203 of the present invention.

The processing operation of the flowchart of FIG. 18 is almost the same as the processing operation of the flowchart described in FIG. 12, but the processing of step S1801 is performed instead of step S1103 of FIG. 12, and a new processing is performed after the processing of steps S1209 and S1210. Step S1802 and Step S1803 are added.
Therefore, the same processing as in FIG. 12 will not be described, but only the changed processing operation will be described.

After the process of step S1206 in FIG. 18, in step S1801, a request for changing the transmission interval of the vehicle travel information is output to the communication control unit 203, and then the process proceeds to step S1103 in FIG.
With this request, for example, the predetermined time interval (for example, m [s]) transmitted to the mobile communication device A500 described in FIG. 7 is set to be shorter (for example, m−k [s]). . Note that k is a natural number of m> k.
For example, the predetermined time interval may be divided into a plurality of distances between the vehicle and the pedestrian, and the interval may be changed according to the distance. For example, the distance between the vehicle and the pedestrian is classified as d, and the distance intervals are classified as f1, f2, and f3 (f1 <f2 <f3). If d <f1, the predetermined interval m is defined as m1, and f1 ≦ d <f2, Then, the predetermined interval m is m2, and if f2 ≦ d <f3, the predetermined interval m is m1, and if f1 ≦ d <f2, the predetermined interval m is m3 (m1 <m2 <m3). good.

Next, in FIG. 18, after the process of step S1209 or after the process of step S1210, the process proceeds to step S1802.
In step S1802, it is determined whether the vehicle travel information transmission interval is being changed from a normal time interval to a short time interval. If it is being changed, the process proceeds to step S1803, and if not (a state in which a normal transmission time interval is set), the process proceeds to step S1103 in FIG.
In step S1803, the communication control unit 203 is requested to change the vehicle travel information transmission interval to the time interval in the normal state, and the process proceeds to step S1103 in FIG.

Next, the flowchart of FIG. 19 will be described. The flowchart of FIG. 19 is substantially the same as the processing operation of the flowchart described in FIG. 14, but is obtained by newly adding processes of steps S1901 and S1902 after the processes of steps S1405 and S1410 of FIG. .
Accordingly, the same processing as in FIG. 14 will not be described, but only the changed processing operation will be described.

In FIG. 19, after the process of step S1405 or after the process of step S1410, the process proceeds to the process of step S1901.
In step S1901, it is determined whether a request for changing the transmission cycle of the vehicle travel information of the host vehicle has been received. When the transmission cycle change request is received, the process proceeds to step S1902, and when the result is NO, the process of FIG.
In step S1902, the setting of the transmission cycle timer value of the vehicle travel information of the host vehicle is changed, and the process of FIG. 19 ends.

  According to the second embodiment, in addition to the effects of the first embodiment, when there are a large number of vehicles or pedestrians in the vicinity where the host vehicle travels, a pedestrian approaching the host vehicle is detected. By setting the transmission period of the vehicle travel information to be short, the data transmission frequency to the mobile communication device possessed by the corresponding pedestrian increases more than the transmission frequency by surrounding vehicles, so that It becomes possible to notify the approach of the car.

  A third embodiment of the inter-vehicle and inter-vehicle communication system of the present invention will be described with reference to FIGS. In this embodiment, the transmission cycle is shortened when it is detected that a pedestrian approaches the host vehicle while traveling on an intersection, a curve, or the like with poor visibility. It is also displayed on the navigation screen to notify the driver of driving attention.

  FIG. 20 is a vehicle pedestrian layout diagram when a tall building is present on the left side of the intersection as seen from the traveling direction of the vehicle 400 in the vehicle pedestrian layout diagram described in FIGS. 8 and 9. 2001 is a building installed at an intersection angle where pedestrian A600 is out of line of sight from vehicle 400, and a non-line-of-sight area C2002 in the shaded area is an out-of-line area that is out of line of sight by building 2001. The movement of vehicle 400, pedestrian A600, and pedestrian B610 is the same as in FIG.

  The non-line-of-sight area is an area that cannot be seen due to, for example, an intersection, a curve, or a building with poor line-of-sight. The in-vehicle communication device 300 of the present invention mounted on the vehicle 400 includes map information and building information (size, height, etc.) existing around the place where the vehicle travels, and road information indicating the road visibility. The transmission period of the vehicle travel information may be changed according to the travel location and road information. Further, in the second embodiment, the frequency of transmission is increased when a pedestrian approach is detected, but the vehicle travels in such a place with poor visibility (for example, the presence of a sharp curve or the presence of a high-rise building at an intersection). Among them, the transmission frequency of the vehicle travel information may be increased.

In the case of FIG. 20, which is equivalent to FIG. 8 and FIG. 9, the building 2001 blocks the field of view, and both the passenger such as the driver of the vehicle 400 and the walking pedestrian A600 existing in the non-line-of-sight area C2002 are approaching. I do not notice that. However, when the in-vehicle communication device 300 mounted on the vehicle 400 and the portable communication device A500 possessed by the pedestrian A600 communicate with each other, warnings such as image display and sound output are made by the respective output units 102 and 501. The passenger of the vehicle 400 knows that the pedestrian A600 is approaching, and the pedestrian A600 knows that the vehicle 400 is approaching.
Further, in this case, when a pedestrian existing in the non-line-of-sight area 2002 is found, the mutual information is quickly exchanged by setting the transmission interval of the emergency vehicle travel information shorter than the normal time interval. More suitable inter-vehicle communication can be realized.

  FIG. 21 shows a pedestrian from the mobile communication device A500 in the in-vehicle communication device 300 mounted on the vehicle 400 in which the navigation control unit 101 of the navigation unit 100 exists in the out-of-sight area C2002 of an intersection with poor visibility as shown in FIG. It is a figure which shows an example at the time of receiving the information and displaying the content which analyzed the pedestrian information on the display of the output part 102, when the pedestrian A600 approaching to the own vehicle is detected. Reference numeral 1701 denotes a display A indicating an approaching pedestrian existing on the left of the front intersection. In the display of FIG. 21, the non-line-of-sight area C2002 is indicated by hatching to indicate that it is different from other displays. However, it is not highlighted by hatching or the like, and may be the same as normal display. . Further, the highlighting does not need to be diagonal lines, and any method may be used, and the pedestrian or the display A1701 in the out-of-sight area is highlighted by some method (for example, blinking display, surrounding with a conspicuous color frame, etc.). May be.

FIG. 22 is a flowchart illustrating an example of processing for receiving pedestrian information from the mobile communication device A500 in the application processing of the navigation control unit 101. The processing operation of the flowchart of FIG. 22 is substantially the same as the processing operation of the flowchart described in FIG. 18, and is an embodiment in which step S2201 is added before the processing of step S1102 of the flowchart described in FIG.
Accordingly, the same processing as in FIGS. 12 and 18 will not be described, and only different processing operations will be described.

When the process of step S1102 in FIG. 11 is started, in step S2201, the pedestrian information is acquired, and the position of the mobile communication device A500 possessed by the pedestrian A600 is set to the travel attention area (non-line-of-sight area, for example, It is determined whether or not it is within the non-line-of-sight area C2202). If it is in the non-line-of-sight area, the process proceeds to step S1201. If not, the process in FIG. 22 is terminated, and the process proceeds to step S1103 in FIG.
The non-line-of-sight area setting is not limited to areas that cannot be seen due to poor-looking intersections, curves, buildings, etc., but is set to a driving area adjacent to an elementary school, kindergarten, children's park, nursing home, etc. , Etc. are arbitrary.

  According to the third embodiment described above, in addition to the effects of the first embodiment, when there are a large number of vehicles or pedestrians in the vicinity where the host vehicle travels, walking that is in the non-line-of-sight area and approaches the host vehicle When a person is detected, the driver can be notified to provide necessary pedestrian information, and an in-vehicle communication terminal that does not provide unnecessary pedestrian information to the driver can be provided.

  Furthermore, according to the above-described third embodiment, in addition to the effects of the second embodiment, the in-vehicle communication terminal has the map information and building information (size, height, etc.) existing around the place where the vehicle travels. From the road information indicating the road visibility, change the vehicle driving information transmission cycle according to the driving location and road information, and also drive in places with poor visibility such as the presence of sharp curves and high-rise buildings at intersections. Can increase the transmission frequency, and can provide an in-vehicle communication terminal capable of ensuring safety.

  According to the above embodiment, in a wireless communication system that directly communicates vehicle travel information and pedestrian position information wirelessly using an in-vehicle wireless communication device mounted on a vehicle and a portable wireless communication device carried by the pedestrian. Even when there are many vehicles and pedestrians in the vicinity, information necessary for preventive safety can be appropriately provided to the driver and pedestrian.

The block diagram which shows schematic structure of one Example of the communication system between the vehicles of this invention, and a person-to-vehicle communication. The block diagram which shows the structure of one Example of the navigation control part of the vehicle-mounted communication apparatus of this invention. The block diagram which shows the structure of one Example of the radio | wireless communication part of the vehicle-mounted communication apparatus of this invention. The block diagram which shows the structure of one Example of the communication control part of the vehicle-mounted communication apparatus of this invention. The figure explaining one Example of the content of the vehicle running information in this invention. The block diagram which shows the structure of one Example of the portable communication apparatus of this invention. The figure explaining one Example of the content of the pedestrian information in this invention. The vehicle pedestrian arrangement | positioning figure for demonstrating one Example of this invention about the case where a vehicle performs radio | wireless communication with the surrounding vehicle and pedestrian. The vehicle pedestrian arrangement | positioning figure for demonstrating one Example of this invention about the case where a vehicle performs radio | wireless communication with the surrounding vehicle and pedestrian. The sequence diagram for demonstrating one Example in the portable communication apparatus which a vehicle and a pedestrian possess in this invention transmit / receive vehicle driving information and pedestrian information. The flowchart for demonstrating one Example of the processing operation of the navigation control part in this invention. The flowchart for demonstrating one Example of the processing operation of the navigation control part of this invention. The flowchart for demonstrating one Example of the processing operation of the navigation control part of this invention. The flowchart for demonstrating one Example of the control processing operation | movement of the communication apparatus part in this invention. The flowchart for demonstrating one Example of the control processing operation | movement of the communication apparatus part in this invention. The flowchart for demonstrating one Example of the control processing operation | movement of the portable communication apparatus in this invention. The figure for demonstrating one Example of the display screen displayed on the output part of the navigation part of this invention. The flowchart for demonstrating one Example of the processing operation of the navigation control part of this invention. The flowchart for demonstrating one Example of the control processing operation | movement of the communication apparatus part in this invention. The vehicle pedestrian arrangement | positioning figure for demonstrating one Example of this invention about the case where a vehicle performs radio | wireless communication with the surrounding vehicle and pedestrian. The figure for demonstrating one Example of the display screen displayed on the output part of the navigation part of this invention. The flowchart for demonstrating one Example of the processing operation of the navigation control part of this invention.

Explanation of symbols

  100: navigation unit 101: navigation control unit 102: output unit 103: input unit 200: communication device unit 201: wireless communication unit 202: antenna 203: communication control unit 300: in-vehicle communication device 400 : Vehicle, 500, 510: portable communication device, 600, 610: pedestrian A, 1011: acceleration sensor, 1012: GPS, 1013: gyro, 1014: map information recording unit, 1015: vehicle information acquisition unit, 1016: other vehicle 1017: Pedestrian information storage unit, 1018: Control unit, 2031: Navigation interface unit, 2032: Communication control processing unit, 2033: Transmission data storage unit, 2034: Reception data storage unit, 2035: Inter-vehicle communication Interface part, 501: Output part, 502: Input Force unit, 503: mobile phone wireless communication unit, 504: inter-vehicle wireless communication unit, 505: vehicle information processing unit, 506: position information acquisition unit, 507: mobile phone control unit, 510: mobile communication device B, 610: walking Person B, 800: Communication area A, 810: s point, 820: u point, 830: x point, 900: Communication area B, 910: t point, 920: v point, 930: y point, 1701: Display A, 2001: Building, 2002: Non-line-of-sight area C.

Claims (2)

In an inter-vehicle communication system in which an in-vehicle communication device mounted on a vehicle and a portable communication device possessed by a pedestrian perform data communication wirelessly,
The vehicle communication device is
A navigation unit that acquires vehicle travel information including at least vehicle position information of the mounted vehicle and a vehicle ID that identifies the vehicle communication device;
The vehicle travel information acquired by the navigation unit is broadcast to a mobile communication device possessed by a pedestrian at a predetermined time interval, and at least the position information of the pedestrian received from the mobile communication device, and the mobile communication device A communication device unit that outputs pedestrian information including position information and a terminal ID that identifies the mobile communication device to the navigation unit;
The navigation part
Whether the pedestrian information analyzes the pedestrian carrying the mobile communication device that transmitted the pedestrian information is in the area outside the sight, and a control unit for detecting whether or not close to the vehicle ,
The control unit includes an output unit that displays or outputs a sound indicating that a pedestrian in an out-of-sight area is approaching the host vehicle ,
The communication device unit is configured to set the predetermined time interval transmitted by the vehicle travel information transmitted by the communication device unit when the navigation unit detects an approach of a pedestrian who is in an out-of-sight area to the host vehicle. A human-to-vehicle communication system characterized by shortening . In the in-vehicle communication device of the inter-vehicle communication system in which the in-vehicle communication device mounted on the vehicle and the portable communication device possessed by the pedestrian wirelessly perform data communication,
A navigation unit that acquires vehicle travel information including at least vehicle position information of the mounted vehicle and a vehicle ID that identifies the vehicle communication device;
The vehicle travel information acquired by the navigation unit is broadcasted to a portable communication device held by a pedestrian at predetermined time intervals, and at least the position information of the pedestrian received from the portable communication device, the position of the own portable communication device A communication device unit that outputs pedestrian information including information and a terminal ID that identifies the mobile communication device to the navigation unit;
The navigation part
Whether the pedestrian carrying the analyzes the pedestrian information portable communication device that transmitted the pedestrian information is in the area outside the sight, and a control unit for detecting whether or not close to the vehicle ,
The control unit includes an output unit that displays or outputs a sound indicating that a pedestrian in an out-of-sight area is approaching the host vehicle ,
The communication device unit is configured to set the predetermined time interval transmitted by the vehicle travel information transmitted by the communication device unit when the navigation unit detects an approach of a pedestrian who is in an out-of-sight area to the host vehicle. A vehicle-mounted communication device for a human-to-vehicle communication system, characterized by being shortened .

Images