JP4893505B2 - Inter-vehicle communication device using wireless USB - Google Patents

Description

  The present invention relates to an inter-vehicle communication apparatus using a wireless USB.

Conventionally, as described in Patent Document 1, for example, an inter-vehicle communication method for performing data communication between vehicles has been proposed. According to the inter-vehicle communication system disclosed in Patent Document 1, the vehicle-mounted communication device composed of a radio wave beacon transmitter and a radio wave beacon receiver is connected to a navigation device to be mounted on a plurality of vehicles. Data is transmitted and received between the navigation devices.
Japanese Patent Laid-Open No. 11-51667

  Since the inter-vehicle communication method of Patent Document 1 described above can transmit and receive data when a vehicle passes through a place where a radio wave beacon is installed, it cannot transmit and receive data in a place where a radio beacon is not installed. There is a problem. On the other hand, an inter-vehicle communication device using a laser radar has been proposed. However, since the laser has high directivity, it cannot cope with various traveling scenes of the vehicle.

  Here, focusing on wireless USB (Wireless Universal Serial Bus, hereinafter referred to as wireless USB) that transmits and receives data by connecting PCs and peripheral devices wirelessly, wireless USB has a maximum reach of about 10 meters. A transfer speed of about 110 Mbps can be realized and can be expected as one of the inter-vehicle communication systems. For example, when a master (host) vehicle (master vehicle) requesting transmission / reception of data receives a connection request from a partner vehicle, the USB address is given to the partner vehicle (slave vehicle) serving as a slave in accordance with a normal USB standard. As a result, a master / slave network is formed, and communication between vehicles becomes possible.

  However, communication between vehicles is different from a communication mode between a PC and its peripheral devices, and the master / slave relationship is not always fixed, and any vehicle can be a master or a slave. Therefore, when wireless USB is applied to vehicle-to-vehicle communication, it is necessary to mount a wireless USB communication device having both master and slave functions on the vehicle. In this case, there are a plurality of master vehicles that request data transmission / reception. There is a possibility that data may not be transmitted and received successfully.

  The present invention has been made in view of the above problems, and an object thereof is to realize inter-vehicle communication using a wireless USB.

The inter-vehicle communication device using the wireless USB according to claim 1 is:
Road map data storage means for storing road map data;
Position detecting means for detecting the current position of the host vehicle;
Road determination means for determining whether the road on the road map corresponding to the current position detected by the position detection means is a priority road or a non-priority road;
A wireless USB communication device having a wireless USB master function and a slave function, and having function switching means for switching a function to be executed among the master function and the slave function when performing inter-vehicle communication with another vehicle; Prepared,
Function switching means
If the road judged by the road judging means is a priority road, switch to the slave function,
When the road determined by the road determination means is a non-priority road, when the host vehicle becomes the leading vehicle of the non-priority road heading to the intersection or intersection with the priority road, switch to the master function ,
When switching to the slave function, after establishing communication with the master vehicle, send slave vehicle information including information that can identify the current location and vehicle to the master vehicle,
When switching to the master function, based on the slave vehicle information transmitted from the slave vehicle, the current location of the slave vehicle and a vehicle schematic diagram that can identify the vehicle are displayed on the display, and the user can select the vehicle schematic diagram by selecting it. It communicates with the slave vehicle selected .

As a result, the wireless USB communication device of the own vehicle is switched to the master function when it becomes the leading vehicle on the non-priority road. Addresses can be given to other vehicles. As a result, a master / slave network in which the host vehicle that is the leading vehicle of the non-priority road is the master vehicle and the other vehicles of the priority road are slave vehicles is formed at the point where the priority road and the non-priority road intersect. Inter-vehicle communication using USB can be realized.
The inter-vehicle communication device using the wireless USB according to claim 2 displays a message list screen for communication on the display unit after the vehicle schematic diagram is selected by the user when the master function is executed. The message selected by the user from the messages displayed on the message list screen is transmitted to the slave vehicle selected by the user by selecting the vehicle schematic diagram.

The inter-vehicle communication device using the wireless USB according to claim 3 is:
Road map data storage means for storing road map data;
Position detecting means for detecting the current position of the host vehicle;
Traveling direction acquisition means for acquiring the traveling direction of the host vehicle;
Whether there is a right or left turn point on the road map corresponding to the current position detected by the position detection means that the vehicle needs to make a right turn or a left turn within a predetermined distance ahead of the direction of travel of the vehicle Right / left turn point determination means for determining
When performing inter-vehicle communication with other vehicles, having a wireless USB master function and slave function,
A wireless USB communication device having a function switching means for switching a function to be executed out of a master function and a slave function,
Function switching means
If the right / left turn point determination means determines that there is no right / left turn point, switch to the slave function,
If the right / left turn point determination means determines that there is a right / left turn point, the vehicle is the vehicle that is closest to the right / left turn point on the road connected to the right / left turn point. Sometimes it is switched to the master function.

  As a result, the wireless USB communication device of the host vehicle becomes a master when it becomes a vehicle that is closest to the right / left turn point on a road connected to the right / left turn point that needs to make a right turn or a left turn. Since it is switched to the function, it is possible to receive a connection request from another vehicle that transmits the connection request and to give the USB address to the other vehicle. As a result, a master / slave network is formed at this right / left turn point where the host vehicle that approaches the right / left turn point that needs to make a right or left turn is the master vehicle and the other vehicle is the slave vehicle. Inter-vehicle communication using USB can be realized.

The inter-vehicle communication device using the wireless USB according to claim 4 is:
Provided with route search means for searching for a route to the destination of the own vehicle,
The right / left turn point determining means determines whether there is a right / left turn point on the route searched by the route searching means.

  As a result, the master / slave network is formed at the right / left turn point on the searched route with the own vehicle approaching the right / left turn point on the searched route as the master vehicle and the other vehicle as the slave vehicle. become.

The inter-vehicle communication device using the wireless USB according to claim 5 is:
Road map data storage means for storing road map data;
Position detecting means for detecting the current position of the host vehicle;
Traveling direction acquisition means for acquiring the traveling direction of the host vehicle;
In the road on the road map corresponding to the current position detected by the position detection means, if there is an intersecting road that intersects the road within a predetermined distance ahead of the traveling direction of the host vehicle, the degree of congestion of the road and each road of the intersecting road Traffic congestion information acquisition means for acquiring traffic congestion information including
A congestion degree determination means for determining the degree of the congestion degree of the road and the crossing road from the traffic congestion information acquired by the traffic congestion information acquisition means;
A wireless USB communication device having a wireless USB master function and a slave function, and having function switching means for switching a function to be executed among the master function and the slave function when performing inter-vehicle communication with another vehicle; Prepared,
Function switching means
If it is determined by the congestion degree determination means that the degree of congestion on the road is larger than the degree of congestion on the crossing road, switch to the slave function,
If the congestion degree determination means determines that the degree of congestion on the road is smaller than the degree of congestion on the intersection road, the host vehicle becomes the leading vehicle of the vehicle heading for the intersection where the road and the intersection road intersect. It is characterized by switching to the master function.

  As a result, the wireless USB communication device of the host vehicle is switched to the master function when it becomes the leading vehicle on the road with the smaller traffic jam level, so that the other vehicle on the road with the higher traffic jam traffic level for transmitting the connection request. The connection request can be received and the USB address can be given to another vehicle. As a result, the master / slave network has different levels of traffic congestion, with the master vehicle being the leading vehicle of the road with the smaller traffic congestion as the master vehicle and the other vehicle with the greater traffic congestion as the slave vehicle. Inter-vehicle communication using wireless USB can be realized at intersections.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the present embodiment, an example in which an inter-vehicle communication function using a wireless USB (Wireless Universal Serial Bus; hereinafter referred to as a wireless USB) is mounted on a car navigation apparatus will be described. FIG. 1 shows a main configuration of the car navigation apparatus. The car navigation device is configured around the navigation ECU 10. The navigation ECU 10 is configured as a microcomputer, all of which are a known CPU 2, ROM 4, RAM 5, I / O (not shown), a bus line connecting these configurations, a display 1, a wireless USB controller 3, And an HDD 6. The ROM 4 stores a program to be executed by the CPU 2, and the CPU 2 executes predetermined arithmetic processing according to this program.

  The display 1 is capable of full color display and can be configured using liquid crystal, organic EL, or the like. The display 1 uses a touch switch integrated with the display screen, a mechanical switch, or the like, and can input operation signals for executing various functions by a touch operation on the display screen.

  An HDD (Hard Disk Drive) 6 stores road data link data, node data, index data, display data, and the like constituting the road map data. Here, link data and node data of road data will be described in detail.

  First, a link is defined by dividing each road on the road map at a plurality of nodes such as intersections, branches, and merging points, and each node is defined as a link. A road is constructed. Link data includes a unique number (link ID) that identifies a link, a link length that indicates the length of the link, coordinates of the start and end of the link, road name, road type, road width, priority / non-priority road type, etc. It consists of each data.

  On the other hand, the node data describes a node ID, a node coordinate, a node name, and a link ID of all links connected to the node for each node where each road on the road map branches, merges, and intersects. Connection link ID, branch point, junction point, and each type of data indicating a point type indicating its corresponding point and its name.

  In addition, the navigation ECU 10 includes a position detector and a VICS information receiver (not shown). Among these, the position detector is a geomagnetic sensor that detects the direction of the traveling direction of the host vehicle, a gyro sensor that detects an angular velocity around the vertical direction of the host vehicle, a distance sensor that detects a moving distance of the host vehicle, and a satellite. It has a GPS receiver for GPS (Global Positioning System) that detects position information indicating the current position and date / time information indicating the current date and time based on radio waves. Since these have errors of different properties, they are configured to be used while being complemented by a plurality of sensors.

  Also, the VICS information receiver includes, for example, a VICS sensor that receives information provided from a VICS (Vehicle Information and Communication System) (registered trademark) center via a beacon laid on a road or FM broadcast stations in various places. Connected. The information received by the VICS information receiver includes, for example, traffic congestion information related to a traffic congestion section and the degree of the traffic congestion, restriction information such as traffic closures due to accidents and construction, and closing of entrances and exits of highways and the like.

  The wireless USB controller 3 is a wireless USB communication device that transmits and receives data by wirelessly connecting to a car navigation device equipped with a wireless USB inter-vehicle communication function mounted on another vehicle. It has a transfer speed of about 110 Mbps at the maximum reach. When a master (host) vehicle (master vehicle) requesting transmission / reception of data receives a connection request from a partner vehicle, the wireless USB controller 3 is a partner vehicle (slave) whose USB address is a slave in accordance with a normal USB standard. To the vehicle), a master / slave network is formed, and inter-vehicle communication becomes possible.

Here, the wireless USB controller 3 has both a wireless USB master function and a slave function, and when performing inter-vehicle communication with a car navigation device mounted on another vehicle, the master function and the slave function. Among these, the function to be executed is switched according to the following switching determination condition.
[Switching condition 1: priority / non-priority of road]
By referring to the road data stored in the HDD 6, it is determined whether the road on the road map corresponding to the current position of the host vehicle is a priority road or a non-priority road. In the case of a non-priority road, switch to the master function only when the host vehicle becomes the leading vehicle of the non-priority road that joins or intersects the priority road (in addition to the leading vehicle) Non-priority road vehicles may be switched to the slave function.)

As a result, the wireless USB controller 3 of the own vehicle switches to the master function when it becomes the leading vehicle of the non-priority road. Can be given to other vehicles. As a result, a master / slave network in which the host vehicle that is the leading vehicle of the non-priority road is the master vehicle and the other vehicles of the priority road are slave vehicles is formed at the point where the priority road and the non-priority road intersect. Inter-vehicle communication using USB can be realized.
[Switching judgment condition 2: Right / left point]
Does the road on the road map corresponding to the current position of the host vehicle have a right / left turn point where the host vehicle needs to make a right turn or a left turn within a predetermined distance (about 10m) ahead of the traveling direction of the host vehicle? If there is no right / left turn point, switch to the slave function. If there is a right / left turn point, the vehicle will turn right / left turn points on the road connecting to the right / left turn point. When the vehicle is located closest to the vehicle, the master function is switched (in addition, the vehicle that is not closest to the right / left turn point may be switched to the slave function).

  As a result, the wireless USB controller 3 of the own vehicle becomes the master when the vehicle is located closest to the right / left turn point on the road connected to the right / left turn point where the right or left turn is required. Since it is switched to the function, it is possible to receive a connection request from another vehicle that transmits the connection request and to give the USB address to the other vehicle. As a result, a master / slave network is formed at this right / left turn point where the host vehicle that approaches the right / left turn point that needs to make a right or left turn is the master vehicle and the other vehicle is the slave vehicle. Inter-vehicle communication using USB can be realized.

  Whether the vehicle is a right or left turn point where it is necessary to make a right turn or a left turn, when the right or left turn signal of the vehicle is lit, the T-junction or intersection in front of the vehicle is What is necessary is just to determine with the own vehicle being the right / left turn point which needs to make a right turn or a left turn.

Further, in the route to the destination searched by the car navigation device, a point where the own vehicle needs to make a right turn or a left turn along the route may be determined as such. As a result, the master / slave network is formed at the right / left turn point on the searched route with the own vehicle approaching the right / left turn point on the searched route as the master vehicle and the other vehicle as the slave vehicle. become.
[Switching judgment condition 3: Congestion degree]
When a road on the road map corresponding to the current position of the host vehicle has a crossing road that intersects the road of the host vehicle within a predetermined distance (about 10 m) ahead of the traveling direction of the host vehicle, reception by the VICS information receiver When the degree of traffic congestion on the road of the own vehicle and each of the crossing roads is obtained from the traffic congestion information obtained, and the size of the road is judged, and the degree of traffic congestion on the road of the own vehicle is larger than the degree of congestion on the intersecting road Switch to the slave function, and if the traffic congestion level of the host vehicle is small compared to the traffic congestion level of the intersection road, the vehicle heads to the intersection where the vehicle road and the intersection road intersect. When it becomes a vehicle, it is switched to the master function (in addition, a vehicle that is not the leading vehicle on a road with a small traffic congestion level may be switched to the slave function).

  As a result, the wireless USB controller 3 of the own vehicle is switched to the master function when it becomes the leading vehicle on the road with the smaller congestion degree, so that the other vehicle on the road with the greater congestion degree transmitting the connection request. The connection request can be received and the USB address can be given to another vehicle. As a result, the master / slave network has different levels of traffic congestion, with the master vehicle being the leading vehicle of the road with the smaller traffic congestion as the master vehicle and the other vehicle with the greater traffic congestion as the slave vehicle. Inter-vehicle communication using wireless USB can be realized at intersections.

Next, an example of an application by inter-vehicle communication using wireless USB will be described.
(1. Interrupt request)
Hereinafter, an example of an interrupt request when an own vehicle interrupts another train of an intersection road where the own vehicle is congested at an intersection as shown in FIG. 2 will be described with reference to flowcharts shown in FIGS. In this example, as shown in FIG. 2, when the own vehicle interrupts the line of the other vehicle when the intersection stops, data for requesting an interruption from the car navigation device of the own vehicle to the car navigation device mounted on the other vehicle. And the request item is displayed on the display of the car navigation device of the other vehicle.

  Then, the driver of the other vehicle inputs an intention to the requested item to the car navigation device and transmits the input intention to the car navigation device of the own vehicle. In FIG. 9, the other vehicles SC1 to SC4 are slave vehicles by the following processing. However, for the sake of simplicity of explanation, the operation of one other vehicle SC3 among the plurality of other vehicles is represented. I will explain.

  In step S1 and step S2 shown in FIG. 9, whether the host vehicle and other vehicles existing near the intersection correspond to the master vehicle or the slave vehicle according to the master / slave switching determination condition described above. Determine. In this example, the host vehicle is on a road that is not congested, and further becomes the master vehicle because it is the leading vehicle on that road. Accordingly, the function to be executed by the wireless USB controller 3 is switched so as to execute the master function. Further, since the other vehicle is on a congested road, it becomes a slave vehicle because the degree of congestion is larger than that of the own vehicle. Accordingly, the function to be executed by the wireless USB controller 3 is switched so as to execute the slave function.

  Subsequently, the other vehicle SC3 that has become the slave vehicle transmits a connection request to the own vehicle MC that has become the master vehicle, and the own vehicle MC receives the connection request and sends a USB to the slave vehicle SC3. Send address. As a result, a network is formed in which the host vehicle MC is the master vehicle and the other vehicle SC3 is the slave vehicle, and communication is established.

  After the communication is established, the other vehicle SC3 transmits slave vehicle information including the vehicle manufacturer code, the vehicle code, and the current location information to the host vehicle MC that is the master vehicle. Here, the vehicle manufacturer code is, for example, a code determined for each vehicle manufacturer by the Japan Automobile Manufacturers Association, and the vehicle code is a code determined for each model of the vehicle manufacturer, and is stored in the ROM 4 in advance. From these various codes, the vehicle manufacturer and the vehicle name can be specified.

  In step S3 of FIG. 9, the own vehicle draws an intersection schematic diagram (FIG. 3) of the current location on the display 1, and based on the slave vehicle information from the other vehicles SC1 to 4 that are slave vehicles, The current location and a vehicle schematic diagram in which the vehicle can be specified are displayed superimposed on the intersection schematic diagram. In addition, when communication is not performed successfully, for example, when a camera is mounted on the own vehicle and the in-vehicle camera can capture the presence of the vehicle on the junction road, the communication of the vehicle that did not perform communication successfully An image may be displayed (the display image may be user-configurable).

  The vehicle schematic diagram is recorded in the HDD 6 together with the road map data. The corresponding schematic shape is extracted from the HDD 6 with reference to the vehicle manufacturer code and the vehicle code received from the other vehicles SC1 to SC4, and based on the current location information. The display may be positioned and drawn. Or you may make it receive image data of a vehicle model shape from other vehicles SC1-4 with a vehicle maker code, a vehicle code, and present location information.

  In step S4 of FIG. 9, the user (driver, etc.) of the car navigation device of the host vehicle MC communicates the intention to the other vehicle on the congested road (for example, requesting that the other vehicle SC3 request an interruption). For this purpose, the vehicle schematic diagram (other vehicle SC3) to be requested to be interrupted is selected by touching the vehicle schematic diagram displayed in the intersection schematic diagram of FIG. By this touch operation, the other vehicle SC3 is highlighted as shown in FIG.

  Here, when trying to establish communication with other vehicles in the lane on the congested road, another vehicle in a state where the communication from the host vehicle MC can be immediately received and another processing of the car navigation device is in progress. Thus, other vehicles that cannot receive immediate communication may be displayed separately. For example, it may be displayed by changing the color to be colored or adding a symbol or the like. In addition, the other vehicle which cannot receive a communication immediately transmits the information to that effect with respect to the own vehicle MC. In addition, when it is possible to immediately receive a communication of intention, information to that effect is transmitted to the host vehicle MC.

  When the vehicle schematic diagram is selected in step S4 of FIG. 9, in step S5, the display screen of the display 1 is updated, and as shown in FIG. In step S6, as shown in FIG. 6, the user of the host vehicle MC selects an entry request ("vehicle entry") from the list by touching it.

  As a result of the selection operation in step S6, the host vehicle MC, with respect to the selected USB address of the other vehicle SC, master information including the message content of the entry request, the vehicle manufacturer code, the vehicle code, and the current location information of the host vehicle MC. The master vehicle information consisting of

  In step S7, the other vehicle SC3 that has received the master information and the master vehicle information draws a schematic diagram of the intersection of the current location on the display 1 in the same manner as the host vehicle MC. The vehicle manufacturer code, the vehicle code, And based on the present location information, a vehicle schematic diagram capable of specifying the vehicle position and the host vehicle MC is displayed superimposed on the intersection schematic diagram.

  In addition, in the other vehicle SC3, when the master information of the entry request is received, in order to clearly notify the user of the other vehicle SC3 from which vehicle the entry request is made, the vehicle schematic diagram of the corresponding vehicle of the intersection model is enlarged and displayed. Or blinking (highlighted).

  Here, when the user of the other vehicle SC3 performs a touch operation on the highlighted vehicle schematic diagram, in step S9, as shown in FIG. 7, the message content of the entry request as master information is displayed on the display 1. As shown in the figure, by displaying the name of the host vehicle MC that can be identified based on the master vehicle information, the user of the other vehicle SC3 can quickly determine which vehicle the request is from. It becomes possible to grasp.

  In step S9, the user of the other vehicle SC3 touches the display of “permitted” when permitting the entry, and touches the display of “not permitted” when the entry is not permitted. When this touch operation is performed, response information indicating permission / non-permission is transmitted to the host vehicle MC that is the master vehicle.

  The host vehicle MC that has received the response information from the other vehicle SC3 in step S10 of FIG. 10 displays the vehicle schematic diagram of FIG. 4 on the display 1 again, and in step S11, the other vehicle that has transmitted the response information. The fact that the response information is received is displayed by blinking 3 or changing the color to be colored. The user of the host vehicle MC can display the content of the response information on the display 1 by touching the vehicle schematic diagram in which the color to be blinked or changed.

  If the other vehicle SC3 permits entry, a “thank you message” is transmitted to the other vehicle SC3, and the vehicle schematic diagram of the host vehicle MC displayed on the display 1 of the other vehicle SC3 is shown. The thank you message may be displayed. Furthermore, a voice transmission function (microphone, in-vehicle camera, and wired USB (all not shown)) is provided, and the face of the user of the own vehicle MC (driver) is displayed on another vehicle that has permitted entry. Or passengers) and voices may be transmitted to convey gratitude.

  In step S <b> 12 of FIG. 10, the host vehicle opens the communication connection with the other vehicle 3 by displaying the content of the response information on the display 1. As a result, the host vehicle MC is no longer the master vehicle, and as shown in FIG. 8, the other vehicle MC that has not transmitted the connection request becomes the master vehicle, and the other vehicles SC1 to 4 that have transmitted the connection request are the slaves. It becomes a vehicle and a new network of masters and slaves is formed.

As described above, based on the vehicle manufacturer code, the vehicle code, and the current location information, the vehicle schematic diagram is displayed on the intersection schematic diagram on the own vehicle MC and the other vehicles SC1 to SC4, and the vehicle to which data is transmitted and received is displayed. Communication can be made by touching and selecting the schematic diagram.
(2. Transmission and reception of video information)
Hereinafter, when the host vehicle SC stops following the front vehicle MC on a T-shaped road as shown in FIG. 12, information such as video information captured by the front vehicle MC is transmitted to the rear host vehicle SC by wireless USB. Thus, an example in which the situation of the T-junction can be grasped also in the own vehicle SC will be described using the flowchart shown in FIG.

  As shown in FIG. 11, the forward vehicle MC and the host vehicle SC in this example include a front camera 7, a back camera 8, and left and right side cameras 9, and images captured by these cameras are used for car navigation of each vehicle. Connected to the device.

  In step S21 and step S22 shown in FIG. 13, the forward vehicle and the host vehicle existing near the T-junction correspond to the master vehicle or the slave vehicle in accordance with the master / slave switching determination condition described above. Judge whether to do. In the example of FIG. 13, the forward vehicle and the host vehicle are on a non-priority road, but the forward vehicle is a master vehicle because it is the leading vehicle of the road. The function to be executed by the USB controller 3 is switched. The host vehicle is a slave vehicle because it is on the non-priority road but is not the head vehicle. Therefore, in the car navigation device of the host vehicle, the function to be executed by the wireless USB controller 3 is switched so that the slave function is executed as the function of the wireless USB controller 3.

  Subsequently, the host vehicle SC that has become the slave vehicle transmits a connection request to the front vehicle MC that has become the master vehicle, and the front vehicle MC receives the connection request and sends a USB to the host vehicle SC. Send address. As a result, a network is formed in which the preceding vehicle MC is the master vehicle and the host vehicle SC is the slave vehicle, and communication is established.

  After the communication is established, the front vehicle MC transmits information on the camera video (front camera video information) captured by the front camera 7, the back camera 8, and the left and right side cameras 9 to the host vehicle SC. In step S23 of FIG. 13, the host vehicle SC receives the front camera image information transmitted from the preceding vehicle MC, and divides these images into three on the display 1 and displays them simultaneously. Thereby, the user of the own vehicle SC can grasp | ascertain the traffic condition in a T-shaped road.

  In step S24, when the forward vehicle MC passes the T-junction, the forward vehicle MC releases the communication connection with the host vehicle SC. As a result, the host vehicle MC is no longer the master vehicle, so the host vehicle that has not transmitted the connection request becomes the master vehicle, the other vehicle that has transmitted the connection request becomes the slave vehicle, and a new network of masters and slaves is created. It is formed. As described above, the front camera data can be transmitted and received between the front vehicle MC and the host vehicle SC.

  As mentioned above, although the example of two applications was described about preferable embodiment of this invention, this invention is not restrict | limited at all to the embodiment mentioned above, In the range which does not deviate from the main point of this invention, it changes variously. Needless to say, an application using inter-vehicle communication can be realized.

It is the block diagram which showed the main structures of the car navigation apparatus. It is a figure for demonstrating the example of the interruption request | requirement at the time of the own vehicle MC stopped at the intersection interrupting into the row | line | column of the other vehicles SC1-4 on the intersection road in traffic congestion. It is an intersection schematic diagram. It is an intersection schematic diagram at the time of vehicle selection. It is a message list screen. It is a screen when an entry request is selected. It is a display screen in other vehicles SC3. It is a figure explaining formation of a network in which the other vehicle MC is the master vehicle and the other vehicles SC1 to SC4 are slave vehicles after the host vehicle receives entry permission from the other vehicle SC3. It is a figure for demonstrating the flow of the data processing of the own vehicle MC and the other vehicle MC3, and the transmission / reception of data in the interruption request. It is a figure for demonstrating the flow of the data processing of the own vehicle MC and the other vehicle MC3, and the transmission / reception of data in the interruption request. This is a configuration of a car navigation device for a front vehicle MC and a host vehicle SC including a front camera 7, a back camera 8, and left and right side cameras 9. It is a figure which shows the front vehicle MC and the own vehicle SC in a T-shaped road. It is a flowchart for demonstrating operation | movement at the time of transmitting front camera video information from the front vehicle MC to the own vehicle SC, and displaying the camera image on the display 1 of the own vehicle SC.

Explanation of symbols

1 Display 2 CPU
3 Wireless USB controller 4 ROM
5 RAM
6 HDD
10 Navi ECU
MC Master vehicle SC1 to SC4 Slave vehicle

Claims (5)

Road map data storage means for storing road map data;
Position detecting means for detecting the current position of the host vehicle;
Road determination means for determining whether a road on the road map corresponding to the current position detected by the position detection means is a priority road or a non-priority road;
A wireless USB communication device having a wireless USB master function and a slave function, and having function switching means for switching a function to be executed among the master function and the slave function when performing inter-vehicle communication with another vehicle; With
The function switching means switches to the slave function when the road determined by the road determination means is a priority road, and when the road determined by the road determination means is a non-priority road, confluence of a priority road, or when a lead vehicle of the non-priority road going to the place crossing, a vehicle communication device using the non-linear USB Ru switched to the master function,
When switching to the slave function, after establishing communication with the master vehicle, the slave vehicle information including information that can identify the current location and the vehicle is transmitted to the master vehicle,
When switching to the master function, based on the slave vehicle information transmitted from the slave vehicle, the current location of the slave vehicle and a vehicle schematic diagram that can identify the vehicle are displayed on the display, and by selecting the vehicle schematic diagram An inter-vehicle communication device that performs communication with a slave vehicle selected by a user. When the master function is executed, after the vehicle schematic diagram is selected by the user, the message list screen for communication is displayed on the display, and the user selects from the messages shown on the message list screen. The inter-vehicle communication device according to claim 1, wherein the transmitted message is transmitted to a slave vehicle selected by a user by selection of a vehicle schematic diagram. Road map data storage means for storing road map data;
Position detecting means for detecting the current position of the host vehicle;
Traveling direction acquisition means for acquiring the traveling direction of the host vehicle;
On the road on the road map corresponding to the current position detected by the position detection means, there are right and left turn points where the own vehicle needs to make a right turn or a left turn within a predetermined distance ahead of the traveling direction of the own vehicle. Right / left turn point judging means for judging whether or not it exists,
A wireless USB communication device having a wireless USB master function and a slave function, and having function switching means for switching a function to be executed among the master function and the slave function when performing inter-vehicle communication with another vehicle; With
The function switching unit switches to the slave function when the right / left turn point determination unit determines that the right / left turn point does not exist, and the right / left turn point determination unit includes the right / left turn point. If it is determined that the vehicle is located at a position closest to the right / left turn point on the road connected to the right / left turn point, the vehicle is switched to the master function. A vehicle-to-vehicle communication device using a featured wireless USB. Comprising route search means for searching for a route to the destination of the host vehicle,
4. The vehicle-to-vehicle communication using wireless USB according to claim 3, wherein the right / left turn point determination means determines whether the right / left turn point exists on the route searched by the route search means. apparatus. Road map data storage means for storing road map data;
Position detecting means for detecting the current position of the host vehicle;
Traveling direction acquisition means for acquiring the traveling direction of the host vehicle;
In the road on the road map corresponding to the current position detected by the position detection means, if there is an intersection road that intersects the road within a predetermined distance ahead of the traveling direction of the host vehicle, the road and the intersection road Traffic congestion information acquisition means for acquiring traffic congestion information including the congestion degree of each road of
From the traffic congestion information acquired by the traffic congestion information acquisition means, a congestion degree determination means for determining the magnitude of the congestion degree of the road and the intersection road,
A wireless USB communication device having a wireless USB master function and a slave function, and having function switching means for switching a function to be executed among the master function and the slave function when performing inter-vehicle communication with another vehicle; With
The function switching means switches to the slave function when the congestion degree determination means determines that the congestion degree of the road is larger than the congestion degree of the intersection road, and the congestion degree determination means When it is determined that the degree of traffic congestion on the road is small compared to the degree of traffic congestion on the intersection road, the host vehicle becomes the leading vehicle of the vehicle heading for the intersection where the road and the intersection road intersect An inter-vehicle communication apparatus using a wireless USB, characterized by switching to the master function.

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