JPH1151667A - Vehicle-to-vehicle communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle-to-vehicle communication system through which a vehicle can be connected to another vehicle and can deliver and receive data to and from the another vehicle with a light economic burden through a simple operating procedure. SOLUTION: A radio wave beacon transmitter-receiver 7 is connected to a navigation controller 1. The data communicated between vehicles through the beacon receiver 7 contain a large division ID which can be distinguished from ordinary VICS information. In addition, data transmitted from an emergency vehicle, data transmitted from an ordinary vehicle, or data communicated between specific vehicles can be distinguished by including an information identification code in communicated data. For example, the present location or predetermined running course of the emergency vehicle can be informed to peripheral vehicles by acquiring the positional data or guided route data of its own vehicle by means of a transmission-reception control section 50 in the navigation controller 1 and transmitting the acquired data to the peripheral vehicles through the transmitter-receiver 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an inter-vehicle communication system for performing data communication between vehicles.

[0002]

2. Description of the Related Art Generally, an on-vehicle navigation device detects a current position of a vehicle, reads map data near the current position from a CD-ROM, and displays the map data on a screen. Also,
In the center of the screen, a vehicle position mark indicating the vehicle position is displayed, and the map data in the vicinity is scrolled according to the progress of the vehicle around the vehicle position mark so that the map information around the vehicle position can be always understood. Has become.

Recently, by connecting a mobile phone or a radio to a navigation device, a vehicle position and a simple message are transmitted / received to / from another vehicle and another screen is displayed on a screen of the navigation device of the own vehicle. 2. Description of the Related Art A data communication system that displays a position of a vehicle or the like is known.

[0004]

By the way, in the above-mentioned conventional data communication system, when data communication is performed between navigation devices mounted on different vehicles, each of the navigation devices performs communication between vehicles. Since it is necessary to connect a mobile phone or a wireless device as a communication device, the connection becomes complicated and an economic burden is large. In addition, before performing data communication between navigation devices, an operation of connecting a communication line with a communication device of the other party needs to be performed separately from operation of the navigation device, which has led to complication of the operation.

The present invention has been made in view of the above points, and has as its object to transmit and receive data between vehicles by a simple connection and a simple operation procedure with a small economic burden. It is an object of the present invention to provide a vehicle-to-vehicle communication system capable of performing such a communication.

[0006]

In order to solve the above-mentioned problems, an inter-vehicle communication system according to the present invention is used for a specific application, for example, VICS information or automatic charge collection (ETC: Electron collection).
By connecting an in-vehicle communication device for transmitting and receiving data of the IC Toll Collection to the navigation device, data is transmitted and received between the navigation devices of these vehicles.

Specifically, a radio beacon transmitter is mounted on one vehicle and a radio beacon receiver is mounted on the other vehicle, and data is transmitted and received between navigation devices via these transmitters and receivers. Do. Thus VIC
Since radio wave beacon transmitters and radio beacon receivers that transmit and receive S information are used to transmit and receive data between navigation devices of a plurality of vehicles, it is necessary to connect other communication devices such as mobile phones. In addition, the connection can be simplified and the economic burden does not increase. In addition, since the radio beacon transmitter and the like are used by being connected to the navigation device, in which case an operation instruction can be given from the navigation device, the radio beacon transmitter and the like are operated separately from the operation of the navigation device to perform communication. Individual operations such as connecting a line are not required, and the operation procedure can be simplified.

In the inter-vehicle communication system of the present invention, the data transmitted from the radio wave beacon transmitter includes the data of the own vehicle position and the planned traveling route. The position of the own vehicle and the planned travel route of the vehicle that transmitted the data are displayed on the map image. In this way, by displaying the own vehicle position of another vehicle and the planned traveling route, for example, it is possible to facilitate traffic at an intersection with poor visibility. In particular, when the vehicle from which data is transmitted is an emergency vehicle such as an ambulance, appropriate measures can be taken, such as making it possible for other vehicles to know the approach of the emergency vehicle and securing a driving lane for the emergency vehicle. Can be taken.

In the inter-vehicle communication system according to the present invention, the received data is data transmitted from an on-vehicle radio beacon transmitter or data transmitted from a radio beacon transmitter installed on a road. It is possible to determine whether or not the VICS information sent from the VICS center identifies the traveling direction of the own vehicle based on the direction identification signal. Processing suitable for received data, such as not identifying the traveling direction of the own vehicle, can be realized.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A navigation device according to an embodiment to which the inter-vehicle communication system of the present invention is applied, by connecting a radio beacon transceiver, data can be exchanged with a navigation device mounted on another vehicle. It is characterized by sending and receiving. Hereinafter, a navigation device according to an embodiment of the present invention will be described with reference to the drawings.

(1) Overall Configuration of Navigation Apparatus FIG. 1 is a diagram showing a configuration of a navigation apparatus according to an embodiment to which the present invention is applied. The navigation apparatus shown in FIG. 1 includes a navigation controller 1 for controlling the entire system, a CD-ROM 2 on which various map data necessary for map display and route search are recorded, and a CD-ROM 2
2, a disk reading device 3 for reading map data recorded in the vehicle 2, a remote control (remote control) unit 4 as an operation unit for a user to input various instructions, and a GPS reception for detecting a vehicle position and a vehicle direction. Device 5 and autonomous navigation sensor 6, a radio wave beacon transceiver 7 for transmitting and receiving data to and from another vehicle or a VICS center, and a display device 9 for displaying a map image and a guidance route superimposed thereon.
And

The above-described disk reading device 3 can be loaded with one or a plurality of CD-ROMs 2 and any one of the CD-ROMs 2 is controlled by the navigation controller 1.
-Read map data from the ROM 2. The remote control unit 4 has character input keys and various operation keys for inputting a message to be sent to another vehicle, and sends an infrared signal according to the operation state of the keys to the navigation controller 1.
Send to.

The GPS receiver 5 receives radio waves transmitted from a plurality of GPS satellites, performs three-dimensional positioning processing or two-dimensional positioning processing, and calculates the absolute position and direction of the vehicle (the vehicle direction is the current Is calculated based on the own vehicle position and the own vehicle position one sampling time ΔT before), and these are output together with the positioning time. The autonomous navigation sensor 6 includes an angle sensor such as a vibrating gyroscope that detects the vehicle rotation angle as a relative direction, and a distance sensor that outputs one pulse every predetermined traveling distance. Detect orientation.

The radio beacon transceiver 7 transmits and receives various data such as vehicle position information, scheduled travel route information, and messages to and from a radio beacon transceiver of another vehicle, and transmits a radio beacon installed on the road. VICS information sent from the device is received.

The display device 9 displays map information around the own vehicle together with position marks, departure point marks, destination marks, etc. of the own vehicle and other vehicles based on image data output from the navigation controller 1. , A guidance route is displayed on this map.

(2) Detailed Configuration and Operation of Navigation Controller Next, a detailed configuration of the navigation controller 1 shown in FIG. 1 will be described. The navigation controller 1 includes a map buffer 16 for displaying a predetermined map on the display device 9 based on the map data read from the CD-ROM 2, a map reading control unit 18, a map drawing unit 20, a VRAM 22, a reading control unit 24, Image synthesis unit 26
And a vehicle position calculation unit 30 that calculates the position of the vehicle and performs a map matching process, and a route search processing unit 3 that performs a route search process and a route guidance process and displays the results.
6, a guidance route drawing unit 42 and a mark image generation unit 44. Further, the navigation controller 1 includes a remote controller control unit 60 for displaying various operation screens for the user and transmitting operation instructions from the remote control unit 4 to the respective units, a cursor position calculator 62, an operation screen generator 6
4, a transmission / reception control unit 50 for controlling transmission and reception of data via the radio wave beacon transceiver 7 and displaying various information based on the reception data on a map image, and a reception information drawing unit 52.

The map buffer 16 includes the disk reader 3
Is for temporarily storing the map data read from the CD-ROM 2 by the above method. When the screen center position is calculated by the reading control unit 24, an instruction to read map data in a predetermined range including the screen center position is sent from the map reading control unit 18 to the disk reading device 3, and the map necessary for map display is displayed. Data is read from the CD-ROM 2 and stored in the map buffer 16.

The map drawing section 20 creates a map image required for display based on a drawing unit included in the map data stored in the map buffer 16. The created map image data is stored in the VRAM 22, and the read control unit 24
Thereby, map image data for one screen is read. The image synthesizing unit 26 adds the read map image data to
Image data output from each of the mark image generation unit 44, the operation screen generation unit 64, and the reception information drawing unit 52 are superimposed to perform image synthesis, and the synthesized image is displayed on the screen of the display device 9.

The vehicle position calculation unit 30 calculates the position of the vehicle based on the data detected by the GPS receiver 5 and the autonomous navigation sensor 6, and when the calculated position is not on the road in the map data. A map matching process for correcting the own vehicle position is performed.

The route search processing section 36 searches for a traveling route that connects a preset destination and departure place under predetermined conditions. The guide route drawing unit 42 draws the guide route set by the route search processing unit 36 so as to overlap the map image. The mark image generating section 44 generates a vehicle position mark at the position of the own vehicle or generates a cursor mark having a predetermined shape.

The transmission / reception control unit 50 controls the transmission / reception operation of data via the radio wave beacon transceiver 7, and is input by the own vehicle position data, the planned traveling route of the own vehicle, the driver, etc. as necessary. Fetched message
Output to the radio wave beacon transceiver 7. When data from another vehicle is input via the radio beacon transceiver 7, the transmission / reception control unit 50 sends the data to the reception information drawing unit 52. The reception information drawing unit 52 includes a transmission / reception control unit 5
0 on the VRAM 22 based on data input through the VRAM 22 or a message sent from another vehicle in the image synthesizing unit 2.
6 to the display device 9.

(3) Detailed Configuration of Radio Beacon Transceiver Next, the configuration of the radio beacon transceiver 7 will be described. FIG. 2 is a diagram showing a detailed configuration of the radio wave beacon transceiver 7. As shown in the figure, a radio beacon transceiver 7 includes an antenna 80 for transmitting and receiving radio waves, a transmission unit 81 for transmitting data to another vehicle, and a radio beacon installed on another vehicle or on the road. Transmitter (not shown)
And a receiving unit 85 for receiving data sent from the server.

The transmitting section 81 performs a scrambling process on the input data and adds a CRC code as an error detection code, and outputs from the transmitting data processing section 82. A data modulation unit 83 that performs GMSK modulation on data and an RF oscillation unit 84 that superimposes a modulated signal on a carrier wave of a predetermined frequency and outputs the signal from the antenna 80 are provided.

The above-mentioned receiving section 85 is provided with the antenna 8
RF amplifier 86 for amplifying a high-frequency signal input from 0
And a frequency converter 8 that performs frequency conversion on a signal output from the RF amplifier 86 and converts the signal into an intermediate frequency signal.
7, a local oscillator 88, an IF amplifier 89 for amplifying the frequency-converted intermediate frequency signal, and an amplified GMSK
A data demodulation unit 90 that performs demodulation processing on the intermediate frequency signal of the modulated wave, a synchronization detection unit 91 that performs synchronization detection based on the data demodulated by the data demodulation unit 90 and generates a 1 kHz reference signal, By performing AM detection on the intermediate frequency signal output from the amplifying section 89, 1 kHz is obtained.
a 1 kHz demodulation unit 92 for demodulating the z direction identification signal;
a phase determination unit 93 that compares a 1 kHz direction identification signal output from a kHz demodulation unit 92 with a 1 kHz reference signal output from a synchronization detection unit 91 to determine a phase, and a demodulation output from a data demodulation unit 90 A received data processing unit 94 is provided for performing direction identification on the subsequent signal based on the phase determination result, descrambling data, and performing error detection based on a CRC code.

(4) Structure of Transmitted / Received Data Next, the frame structure of data transmitted / received via the radio beacon transceiver 7 will be described. FIG. 3 is a diagram showing a configuration of the transmission / reception data. Radio beacon transceiver 7
Transmits and receives data in units of variable-length large-section data, and the large-section data is divided and transmitted / received in frame units composed of fixed-length packets. As shown in FIG. 3, each frame includes a synchronization code, a frame header part, an actual data part, and a CRC code.
If one large section data has a length equal to or longer than the actual data portion of each frame, the large section data is divided into a plurality of frames.

The large section data includes a large section ID and an information identification code. The large section ID indicates the type of the large section data, and is assigned one of values “01” to “99” in correspondence with the VICS information transmitted from the radio beacon transmitter installed on the road. ing. Also, when sending and receiving data between vehicles,
“A0” is assigned to this large section ID, so that it can be distinguished from VICS information. The information identification code is
When data is transmitted and received between vehicles, the content and the usage of the data are specified, and details will be described later.

(5) Operation at Transmission / Reception Next, the operation of the navigation device when data is transmitted / received via the radio beacon transceiver 7 will be described. For example, when the emergency vehicle transmits data to an unspecified vehicle around the emergency vehicle, the information identification code described above is set to “00”.
When a general vehicle transmits data to an unspecified vehicle in the vicinity, the information identification code is set to “01”. When data is transmitted and received between specific vehicles, the information identification code is set to “02”. To "FF".

(5-1) Operation at Transmission FIG. 4 is a flowchart showing the operation procedure of the navigation device at the time of data transmission, and mainly the operation of the transmission / reception control unit 50 and the radio wave beacon transceiver 7 in the navigation controller 1. It is shown. For example, as the transmission data, one of vehicle position data, planned traveling route data, and message data is considered.

The transmission / reception control unit 50 monitors whether or not a user (driver or passenger) of the navigation device has instructed data transmission to another vehicle (step 100), and operates the remote control unit 4. Accordingly, when data transmission is instructed, the next data to be transmitted is vehicle position data (step 101), planned traveling route data (step 103), and message data. (Step 105). When transmission of vehicle position data is designated by operating the remote control unit 4, the transmission / reception control unit 50
The vehicle position data after the correction processing by the map matching output from the vehicle position calculation unit 30 is acquired as transmission data (step 102). Also, the remote control unit 4
Is operated, the transmission / reception control unit 50 causes the route search processing unit 36
Is acquired as transmission data (step 104). When transmission of message data is instructed by operating remote control unit 4, transmission / reception control unit 50 presses a character input key of remote control unit 4 to input message data or a fixed data prepared in advance. The message data is acquired as transmission data (step 106). In addition, the above-mentioned own vehicle position data and guidance route data need to be described in a common format for all vehicles,
For example, it is preferable to use a normalized longitude, a latitude, a VICS link number, or the like.

When any of the vehicle position data, the scheduled route data, and the message data is obtained in this manner, the transmission / reception control unit 50 creates the large section data shown in FIG. 3 (step 107). The large section ID of the large section data created here is set to “A0” indicating data communication between vehicles. The information identification code is set to “00” when the own vehicle is an emergency vehicle, to “01” when the own vehicle is a general vehicle and to transmit data to another unspecified vehicle, If you want to send data to a specific vehicle, you need to set it in one of "02" to "FF" (it is necessary to determine in advance between two vehicles that you want to send and receive data, for example, "02"). Each is set.

Next, the transmission / reception control section 50 outputs the created large section data to the radio wave beacon transceiver 7. When the large section data is input to the radio beacon transceiver 7, the transmission data processing section 82 in the transmission section 81 divides the large section data into one or a plurality of fixed-length real data sections, and A predetermined frame is created by performing scramble processing and adding a CRC code (step 10).
8). After that, the data of each frame is transmitted to the data
, And a predetermined modulation process is performed.
Is transmitted from the antenna 80 to another vehicle via the antenna (step 109).

(5-2) Operation at the time of reception FIG. 5 is a flowchart showing the operation procedure of the navigation device at the time of data reception, and mainly the operation of the transmission / reception control unit 50 and the radio wave beacon transceiver 7 in the navigation controller 1. It is shown.

When a radio wave transmitted from the radio wave beacon transmitter / receiver 7 of another vehicle or the radio wave beacon transmitter on the road is received via the antenna 80 (step 200), the reception data processing section 94 outputs the data from the data demodulation section 90. To obtain the demodulated frame data (step 201).
Large section data composed of one or a plurality of frames is created (step 202). Next, the reception data processing unit 94
Determines, based on the large section ID included in the large section data, whether the large section data is VICS information transmitted from the radio beacon transmitter on the road (step 2).
03). As described above, the major section IDs are “00” to “9”.
In the case where the VICS information is included in the range of "9", the large section data is VICS information. Is determined (step 20).
4). When the information is unnecessary (for example, when traffic congestion information in the rear section is sent when viewed from the traveling direction of the vehicle)
In this case, the large section data is discarded (step 20).
5) Return to the state of waiting for data reception in step 200. If it is necessary information, the large section data is transferred from the reception data processing unit 94 to the transmission / reception control unit 50 in the navigation controller 1 (step 20).
6).

When the major division ID is "A0", that is, when the received data is transmitted from another vehicle and is not VICS information, data selection based on a direction identification signal or the like is performed. Instead, the large section data is transferred to the transmission / reception control unit 50 in the navigation controller 1 (step 206).

When the large division data is input, the transmission / reception control unit 50 determines whether or not the large division data is VICS information based on the large division ID (step 20).
7) If it is VICS information, normal traffic information or the like is displayed based on this VICS information (step 208).

If the large section data is sent from another vehicle, the transmission / reception control section 50 needs the large section data based on the information identification code included in the large section data. It is determined whether the data is data (step 209). As described above, when information is transmitted and received between specific vehicles, the information identification code is changed from “02” to
It must be determined in advance within the range of “FF”. For example, assuming that the predetermined information identification code is “02”, the large section data including other information identification codes “03” to “FF” is unnecessary information, and such data is discarded. (Step 210).

When the data transmitted from another vehicle and the information identification code is included in the range of "00" to "02", the transmission / reception control unit 50 sets the vehicle included in the received data. The position data, the scheduled route data or the message data is extracted and sent to the reception information drawing section 52. Based on the received data, the reception information drawing unit 52 draws an emergency vehicle mark, another vehicle mark, and a guidance route of another vehicle in the VRAM 22, or draws a message data image. Therefore, these various marks are drawn on the map image and displayed on the display device 9 (step 211).

As described above, by connecting the radio wave beacon transceiver 7 to the navigation controller 1,
It is possible to communicate with other vehicles, and the location of emergency vehicles and other unspecified vehicles or specific vehicles, planned routes, and messages sent from these vehicles can be displayed on the screen of the navigation device of the own vehicle. Can be displayed. In particular, the radio wave beacon transceiver 7 is normally used for obtaining VICS information, and is used for transmitting and receiving data between vehicles, so that data between vehicles such as mobile phones and wireless devices can be used. Since there is no need to connect a communication device dedicated to communication, the economic burden can be reduced. In addition, special wiring such as when a mobile phone or the like is separately connected is not required, and the connection can be simplified. The operation of the radio beacon transceiver 7 is controlled by the navigation controller 1, and the radio beacon transceiver 7 is used to perform line connection and the like.
There is no need to operate itself, and the operation procedure can be simplified.

(6) Screen Display for Each Information Identification Code Next, a specific example of the screen display for each information identification code will be described.

(6-1) When data transmitted from an emergency vehicle to an unspecified vehicle is received (information identification code "00")
The driver of a general vehicle must take measures such as bringing the vehicle to the shoulder of the road when an emergency vehicle such as an ambulance approaches. For this reason, the emergency vehicle sounds a siren or the like to notify that the own vehicle is approaching. However, depending on the situation, it may be difficult for other vehicles to grasp the current position of the emergency vehicle. Therefore, if the current position of the emergency vehicle and the planned traveling route can be displayed on the screen of the navigation device, it is convenient to eliminate such inconvenience. The data of the information identification code “00” is mainly used for such a purpose.

FIG. 6 is a diagram showing a specific example of a screen displayed on an unspecified vehicle based on data transmitted from an emergency vehicle. In the figure, a indicates a vehicle position mark, b indicates an emergency vehicle mark, and c indicates a scheduled travel route of the emergency vehicle. The emergency vehicle has a large section ID of “A0” and an information identification code of “00”, and transmits radio wave beacon transceiver 7 of the own vehicle including data including the own vehicle position data and the scheduled travel route data. . Upon receiving this data, the unspecified vehicle traveling around the emergency vehicle determines that this data was transmitted from the emergency vehicle because the information identification code is "00". Based on the data, an emergency vehicle mark is displayed at the current position of the emergency vehicle, and an arrow mark indicating the planned traveling route is displayed on the traveling route. Therefore, the driver of the unspecified vehicle traveling around the emergency vehicle can take appropriate measures such as temporarily stopping just before the intersection or securing a lane on which the emergency vehicle can travel. The emergency vehicle mark and the like need to be displayed so that the driver can recognize that the display is an emergency vehicle. Therefore, it is desirable that the display be conspicuous and different from other target objects and the like.

(6-2) When data transmitted from an ordinary vehicle to an unspecified vehicle is received (information identification code “0”)
In the case of "1") At an intersection with a poor visibility and a curved road with no visibility, it may not be easy to confirm the intersecting road or the vehicle traveling in the oncoming lane. Therefore, if it is difficult to visually confirm another vehicle directly, it is convenient if such a vehicle's current position and planned traveling route can be displayed without such inconvenience. Information identification code "0
The data of "1" is mainly used for such a use.

FIG. 7 is a diagram showing a specific example of a screen displayed on an unspecified vehicle based on data transmitted from a general vehicle. In the figure, a indicates the own vehicle position mark, b indicates a general vehicle mark as a data transmission source, and c indicates a scheduled traveling route of a general vehicle as a data transmission source. The general vehicle has a large section ID of “A0” and an information identification code of “01”, and transmits from the radio beacon transceiver 7 of the own vehicle, data including the own vehicle position data and the scheduled travel route data. . When an unspecified vehicle running around the general vehicle receives this data,
Since the information identification code is "01", it is determined that this data is transmitted from both general vehicles, and based on this data, the general vehicle mark is set at the current position of the general vehicle, and the vehicle is scheduled to travel on the traveling route. An arrow mark indicating a route is displayed. Therefore, a driver of an unspecified vehicle traveling around this general vehicle can know that this general vehicle is approaching at an intersection with poor visibility or just before a curved road, and decelerate as necessary. Or take appropriate measures such as temporarily stopping. (6-3) When data transmitted from a specific vehicle to a specific vehicle is received (in the case of information identification codes “02” to “FF”) When a plurality of vehicles run toward the same destination It is convenient to be able to know the current position of another vehicle and the planned route. In addition, when only the driver of a specific vehicle knows the travel route to the destination, the other specific vehicle can be informed of the current position of the own vehicle or the planned travel route,
It would be useful if you could send a message. The data of the information identification codes "02" to "FF" is mainly used for such a purpose.

FIG. 8 is a diagram showing a specific example of a screen displayed on another specific vehicle based on data transmitted from one specific vehicle. In the figure, a indicates a vehicle position mark, b indicates a specific vehicle mark as a data transmission source, c indicates a scheduled route of a specific vehicle as a data transmission source, and d indicates a received message. I have. A specific vehicle has a large section ID of “A0”, an information identification code of “02”, and transmits data including a vehicle position mark and travel route data from the radio wave beacon transceiver 7 of the vehicle. . The other specific vehicle running alongside this specific vehicle determines that this data was transmitted from the specific vehicle because the information identification code of this data is "02" specified in advance, Based on this data, a specific vehicle mark is displayed at the current position of the specific vehicle, and an arrow mark indicating that it is a scheduled route is displayed on the traveling route. Further, message data may be included in the transmitted / received data as necessary, and the message may be displayed on a part of the screen in the received specific vehicle. Therefore, the specific vehicles can notify each other of their own vehicle positions, and can exchange messages as needed.

It should be noted that the present invention is not limited to the above embodiment, and various modifications can be made within the scope of the present invention. For example, in the above-described embodiment, the route information set by the route search is transmitted to another vehicle, but by linking with the operation of the direction indicator of the vehicle, information on right turn / left turn and the like is transmitted to other vehicles. May be sent.

Also, in the above-described embodiment, information is transmitted and received between vehicles by the radio beacon transceiver. However, the transmission and reception function of the automatic toll collection (ETC) system is used.
Data may be transmitted and received between the vehicles. In this way, by using a communication device mounted for a specific purpose other than the purpose of transmitting and receiving data between vehicles, it is not necessary to add a communication device dedicated to data communication between vehicles, thereby reducing economic burden. can do.

In the above-described embodiment, the transmission data includes the large section ID and the information identification code,
It is determined whether or not the information is VICS information. If the information is not VICS information, an emergency vehicle, a general vehicle, and a specific vehicle are distinguished. However, if similar identification can be performed, transmission data in another data format may be used.

In the above-described embodiment, the information is directly transmitted and received between the vehicles. However, the radio beacon transmitter installed on the road for transmitting VICS data is provided with a reception function to transmit and receive radio beacons. As a machine, send and receive information between the radio beacon transceiver on this road and the vehicle,
Communication between vehicles may be performed via a VICS center.

[0049]

As described above, according to the present invention, a vehicle-mounted communication device for a specific use, such as a radio beacon transmitter or a radio beacon receiver, is connected to the navigation device of each vehicle, and each of these vehicles is connected. Since data such as the position of the vehicle and the route to be traveled is transmitted and received between the mobile devices, the economic burden can be reduced as compared with the case where a mobile phone or the like is used as a communication device. With simple connections and simple operation procedures, data can be transmitted and received between vehicles.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating an overall configuration of a vehicle-mounted navigation device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of a radio wave beacon transceiver.

FIG. 3 is a diagram showing a configuration of transmission / reception data.

FIG. 4 is a flowchart showing an operation procedure of the navigation device at the time of data transmission.

FIG. 5 is a flowchart showing an operation procedure of the navigation device when receiving data.

FIG. 6 is a diagram showing a specific example of a screen displayed on an unspecified vehicle based on data transmitted from an emergency vehicle.

FIG. 7 is a diagram showing a specific example of a screen displayed on an unspecified vehicle based on data transmitted from a general vehicle.

FIG. 8 is a diagram showing a specific example of a screen displayed on another specific vehicle based on data transmitted from one specific vehicle.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 navigation controller 7 radio beacon transceiver 30 vehicle position calculation unit 36 route search processing unit 50 transmission and reception control unit 52 reception information drawing unit 60 remote control control unit 81 transmission unit 82 transmission data processing unit 85 reception unit 94 reception data processing unit

Claims (5)

[Claims] 1. An inter-vehicle communication device, wherein data is transmitted and received between the navigation devices mounted on a plurality of vehicles by connecting an in-vehicle communication device mounted for a specific use and a navigation device. Communication method. 2. The vehicle-mounted communication device according to claim 1, wherein the on-vehicle communication device is a radio beacon transmitter and a radio beacon receiver, and the radio beacon transmitter mounted on one vehicle and the radio wave beacon mounted on the other vehicle. An inter-vehicle communication system, wherein data is transmitted and received between navigation devices mounted on the plurality of vehicles via respective beacon receivers. 3. The data according to claim 2, wherein the data transmitted from the radio beacon transmitter mounted on the one vehicle includes data of at least one of a vehicle position and a scheduled route. The vehicle-to-vehicle communication system, wherein the navigation device mounted on the other vehicle that has received the vehicle information displays the own vehicle position or the planned traveling route of the one vehicle on a map image. 4. The emergency vehicle according to claim 3, wherein the one vehicle equipped with the radio beacon transmitter is an emergency vehicle, and a navigation device mounted on the other vehicle, wherein the emergency vehicle has its own vehicle position or traveling. An inter-vehicle communication system characterized by displaying a scheduled route. 5. The radio wave beacon receiver according to claim 2, wherein the radio wave beacon receiver or the navigation device connected to the radio wave beacon receiver receives received data from the vehicle-mounted radio wave beacon transmitter. It is possible to determine whether it is transmitted from a radio beacon transmitter installed on the road or if the received data is transmitted from the on-board radio beacon transmitter A vehicle-to-vehicle communication system, wherein the identification of the traveling direction of the vehicle based on the direction identification signal is not performed.