JP2004139510A - On-vehicle information device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an on-vehicle information device for showing traffic information as appropriate as possible even when an own device cannot receive the traffic information properly. <P>SOLUTION: When traffic information is received by the traffic information communication device, a traffic information calibrator part 134 transmits in the form of broadcast the received traffic information, as the referential traffic information, through an inter-vehicle communication device 12. Appropriateness of the received traffic information is checked with the referential traffic information received from another vehicle through the inter-vehicle communication device 12, and the presumably appropriate traffic information is shown to a user. When the referential traffic information is received from another vehicle through the inter-vehicle communication device 12 and the traffic information is not received by the own vehicle, the traffic information is shown based on the referential traffic information received from another vehicle. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to an in-vehicle information device that presents traffic information to a user.
[0002]
[Prior art]
As an in-vehicle information device that presents traffic information to a user, an in-vehicle information device that presents traffic information such as VICS information transmitted by radio / optical beacon or FM multiplex broadcasting to a user is known.
As such an in-vehicle information device, there is known a technology of displaying the position of another vehicle acquired from another vehicle on a map by inter-vehicle communication (for example, JP-A-11-51667).
[0003]
[Patent Document 1]
Japanese Patent Application Laid-Open No. 11-51667
[Problems to be solved by the invention]
When traffic information is transmitted by a beacon, the on-vehicle information device may not be able to receive the transmitted traffic information due to the influence of the presence of another vehicle. Then, in such a case, the in-vehicle information device cannot present the traffic information to the user. Further, even when a failure occurs on the in-vehicle information device and traffic information cannot be received, the traffic information cannot be presented to the user. Furthermore, the possibility that traffic information is erroneously received due to a surrounding environment or a failure occurring in an onboard information device cannot be completely denied.
[0005]
That is, the reliability of the function of receiving the traffic information and presenting it to the user in the in-vehicle information device is not sufficient.
Therefore, an object of the present invention is to improve the reliability of the function of an in-vehicle information device that receives traffic information and presents it to a user. More specifically, for example, an object of the present invention is to provide an in-vehicle information device capable of presenting traffic information as appropriate as possible even when the device itself cannot receive traffic information correctly. And
[0006]
[Means for Solving the Problems]
In order to achieve the object, the present invention provides an on-board information device that is mounted on an automobile and processes traffic information, a traffic information receiving device that receives traffic information, and a wireless communication with an on-board information device mounted on another vehicle. A vehicle-to-vehicle communication device, a reference information transmitting unit that transmits traffic information received by the traffic information receiving device from the vehicle-to-vehicle communication device to a vehicle-mounted information device mounted on another vehicle, and the traffic information receiving device. Traffic information received in the, from the reference information received from the in-vehicle information device mounted on another vehicle in the inter-vehicle communication device, traffic information verification means for determining an error in the traffic information received by the traffic information receiving device, It is composed of
[0007]
According to such an in-vehicle information device, when traffic information is received by the traffic information receiving device in the in-vehicle information device mounted on the vehicle, whether or not the traffic information is truly correct is determined by inter-vehicle communication as reference information. Since verification can be performed by comparing the traffic information received from another vehicle with the traffic information received by the other vehicle, the reliability of the traffic information with respect to a reception error can be improved.
[0008]
Here, in such an in-vehicle information device, when the traffic information verification unit determines that the traffic information received by the traffic information receiving device is erroneous, the inter-vehicle communication device transmits the traffic information to another vehicle. It is preferable to provide an alternative traffic information presenting means for presenting the traffic information indicated by the reference information received from the onboard information device mounted on the user as an alternative to the traffic information received by the traffic information receiving device.
[0009]
In this way, even if the traffic information received by the own vehicle is incorrect, the user can use the traffic information received from another vehicle by the inter-vehicle communication as reference information instead of using the traffic information. Can be presented.
The present invention further provides a traffic information receiving device for receiving traffic information, an inter-vehicle communication device for performing wireless communication with an on-vehicle information device mounted on another vehicle, and the traffic information receiving device. Reference information transmitting means for transmitting the traffic information received in the inter-vehicle communication device as reference information to the in-vehicle information device mounted on another vehicle, and the reference information transmitted from the on-vehicle information device mounted on another vehicle When the traffic information is received by the inter-vehicle communication device, when the traffic information receiving device does not receive the traffic information corresponding to the traffic information indicated by the reference information, the alternative traffic that presents the traffic information indicated by the reference information to the user An in-vehicle information device provided with information presenting means is also provided.
[0010]
According to such an in-vehicle information device, even when the traffic information cannot be received, the own vehicle receives the traffic information received from the other vehicle by the inter-vehicle communication as the reference information. It is possible to detect the omission of reception of traffic information that should have been performed and to present the traffic information that the host vehicle should have received to the user. That is, even if the traffic information is missed, the traffic information can be presented to the user.
[0011]
Further, in such an in-vehicle information device, when the reference information transmitted from the in-vehicle information device mounted on another vehicle is received by the inter-vehicle communication device, the reference information corresponds to the traffic information indicated by the reference information. Failure detection means for detecting a failure of the traffic information receiving device when the frequency at which the traffic information is not received by the traffic information receiving device exceeds a predetermined frequency may be provided.
[0012]
By doing so, it is possible to properly detect a failure of the traffic information receiving device and notify the user.
Here, the alternative traffic information presenting means in the on-vehicle information device as described above, when there is a plurality of reference information received from the on-vehicle information device mounted on another vehicle in the inter-vehicle communication device, the plurality of reference information It is preferable to select traffic information having the largest number of other matching traffic information from among the plurality of traffic information indicated by, and present it to the user.
[0013]
Thus, by selecting the traffic information estimated to be the most correct from the traffic information indicated by the plurality of reference information by majority logic, the traffic information received from the on-vehicle information device mounted on another vehicle by the inter-vehicle communication device is obtained. When presenting the traffic information indicated by the reference information to the user, the accuracy of the presented traffic information can be improved.
[0014]
Further, the above-mentioned on-vehicle information device may include, as the traffic information receiving device, a beacon receiver that receives the traffic information from a fixedly installed beacon transmitter.
Note that each of the above-described on-board information devices may be configured as an on-board information device that processes arbitrary information instead of traffic information. For example, instead of traffic information, information transmitted from a predetermined information transmission system may be received, and the received information may be processed in the same manner as the above-described processing for traffic information.
[0015]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described.
First, FIG. 1 shows an outline of a road configuration system to which the present embodiment is applied.
As shown in the figure, in the road traffic information system to which the present embodiment is applied, a beacon transmission device 1 that performs data transmission using radio waves / lights fixedly installed on a road side travels at a beacon transmission installation location on a road. It notifies various types of traffic information such as traffic congestion information and traffic regulation information to an on-vehicle information device installed in the vehicle 2.
[0016]
FIG. 2 shows a configuration of an in-vehicle information device mounted on each vehicle 2 in such a road traffic information system in the present embodiment.
As shown in the figure, the in-vehicle information device 10 is a traffic information receiving device 11 that is a beacon receiving device that receives traffic information transmitted from a beacon device, and is mounted on another vehicle located at a short distance by short-range wireless communication. Vehicle-to-vehicle communication device 12, traffic information processing device 13, navigation device 14, display device 15, input device 16, which communicates with the selected on-board information device, the user and the navigation device 14 via the display device 15 or the input device 16, and traffic It has a GUI control unit 17 that performs input / output processing with the information processing device 13.
[0017]
In addition, the traffic information processing device 13 includes a traffic information acquisition unit 131 that acquires the traffic information received by the traffic information receiving device 11, a received other vehicle information memory 132, and information received by the inter-vehicle communication device 12 from other vehicles. The reference information discriminator 133 separately stored in the received other vehicle information memory 132 and presented to the user based on the traffic information obtained by the traffic information obtaining unit 131 and the information received from another vehicle stored in the received other vehicle information memory 132. Traffic information calibrating section 134 for determining traffic information and messages to be transmitted, and a traffic information output section for displaying and outputting traffic information and messages determined to be presented to the user by the traffic information calibrating section 134 to the display device 15 via the GUI processing section. 135.
[0018]
On the other hand, the navigation device 14 includes a map data storage unit 141 that stores map data representing a road map, a GPS receiver 142 that measures a current position based on a radio wave received from a GPS satellite, a traveling speed of the own vehicle, each acceleration, and the like. And a map matching process between the current position measured by the GPS receiver 142 and the map data stored in the map data storage unit 141 in consideration of the running state sensor output and the running state sensor output. A current running state calculation unit 144 for calculating a current running state such as a running road, a current position, and a running direction, and a guide data from the input device 16 to the destination input via the GUI control unit 17 are stored in a map data storage unit 141. Route calculation unit 1 that calculates according to the map data stored in the vehicle and the current driving state calculated by the current driving state calculation unit 144 5. A GUI control unit displays a navigation image representing the current position calculated by the current driving state calculation unit 144 and the guidance route calculated by the guidance route calculation unit 145 on the road map represented by the map data stored in the map data storage unit 141. And a travel guidance processing unit 146 that outputs a display to the display device 15 via the display device 17.
[0019]
Hereinafter, processing of traffic information in such an in-vehicle information device will be described.
When the traffic information calibrating unit 134 of the traffic information processing apparatus 13 is started, the traffic information broadcast processing shown in FIG. 3 and the traffic information guidance processing shown in FIGS.
First, the received traffic information broadcast processing will be described.
As shown in FIG. 3, in this process, the traffic information acquisition unit 131 monitors acquisition of traffic information, that is, reception of traffic information of the traffic information receiving device 11 from the beacon transmitting device 1 (step 302). Then, when the traffic information is received, the current traveling state information indicating the current traveling state such as the current traveling road, the current position, and the traveling direction of the own vehicle is obtained from the current traveling state calculation unit 144 of the navigation device 14 ( Step 304). Then, the traffic information received by the traffic information receiving device 11 is added with the current traveling state information obtained from the current traveling state calculating unit 144 and the current time, and transmitted as reference traffic information from the inter-vehicle communication device 12 in a broadcast format. (Step 306).
[0020]
In this way, the reference traffic information transmitted by the inter-vehicle communication device 12 in the broadcast format is received by the inter-vehicle communication devices 12 of all other vehicles located within the communicable range of the inter-vehicle communication device 12, When the transmission source vehicle 2 is a reference vehicle for the other vehicle, it is stored in the reception other vehicle information memory 132 by the reference information discriminating unit 133 of the traffic information processing device 13 of the other vehicle.
[0021]
Here, whether or not the other vehicle that has transmitted the reference traffic information received by the inter-vehicle communication device 12 is a reference vehicle is determined as if no obstacle has occurred, for a predetermined period before and after receiving the reference traffic information. When the own vehicle receives the same traffic information as that of the other vehicle or is in a state where it is expected to receive the same, the other vehicle is determined as a reference vehicle.
[0022]
That is, for example, the reference information discriminating unit 133 determines whether or not the reference vehicle is present by referring to the current traveling state information of the other vehicle included in the reference traffic information received from the other vehicle and the current traveling state calculating unit of the own vehicle navigation device. The current traveling state information acquired from the vehicle 144 is compared, and the map data stored in the map data storage is referred to, and if another vehicle is traveling in the same direction at a position close to the same road as the own vehicle, the reference is made. This is performed by determining that the vehicle is a car.
[0023]
However, the reference vehicle may be defined by other criteria. For example, the communicable distance of the inter-vehicle communication device 12 is sufficiently small, and the traffic information transmitted from the beacon transmission device 1 does not depend on the traveling direction. In such a case, all the reference traffic information received by the inter-vehicle communication may be used as the reference traffic information from the reference vehicle. It is not necessary to include the traveling state information, the reference information discriminating unit 133 may be omitted, and all the reference traffic information may be stored in the reception other vehicle information memory 132.
[0024]
Next, the traffic information guidance processing will be described.
As shown in FIG. 4, in this process, first, the traffic information of the traffic information receiving device 11 is received from the beacon transmitting device 1 (step 402), and the reference traffic information from the reference vehicle is received by the inter-vehicle communication device 12. (Step 418).
Then, when traffic information of the traffic information receiving device 11 is received from the beacon transmitting device 1, first, the error counter B provided for monitoring a failure of the traffic information receiving device 11 is cleared (step 404). ), And wait for a predetermined time (step 406). After that, it is checked whether or not the reference traffic information received from the reference vehicle during the waiting period is stored in the reception other vehicle information memory 132 (step 408). If the reference traffic information from the reference vehicle is not stored, the traffic information received by the traffic information receiving device 11 is determined as the traffic information to be presented to the user as it is, and the traffic information output unit 135 and the GUI control unit 17 are determined. The display is output to the display device 15 through the display (step 416), and the process returns to step 402.
[0025]
On the other hand, if it is determined in step 408 that the reference traffic information from the reference vehicle is stored during the waiting period, the reference traffic information is selected as the first reference traffic information (step 410). It is checked whether or not the traffic information indicated by the selected first reference traffic information matches the traffic information received by the traffic information receiving device 11 (step 412). If they match, the error counter A provided to monitor the failure of the inter-vehicle communication device 12 is cleared (step 414), and the traffic information received by the traffic information receiving device 11 is presented to the user as it is. Is displayed on the display device 15 via the traffic information output unit 135 and the GUI control unit 17 (step 416), and the process returns to step 402.
[0026]
If the first reference traffic information and the traffic information do not match, the reference traffic information from the reference vehicle received during the waiting period other than the first reference traffic information is stored in the received other vehicle information memory. 132 is checked (step 420). If not, the traffic information received by the traffic information receiving device 11 is determined as the traffic information to be presented to the user as it is, and the traffic information output unit 135 The display is output to the display device 15 via the GUI control unit 17 (step 416), and the process returns to step 402.
[0027]
On the other hand, if the reference traffic information from the reference vehicle other than the first reference traffic information is stored in the received other vehicle information memory 132, the stored reference traffic information is stored in the second one. Is selected as the reference traffic information (step 422), and it is checked whether the traffic information indicated by the selected second reference traffic information matches the traffic information received by the traffic information receiving device 11 (step 424). If they match, the error counter A is cleared (step 436), the traffic information received by the traffic information receiving device 11 is determined as the traffic information to be presented to the user as it is, and the traffic information output unit 135 and the GUI control unit 17 are set. The display is output to the display device 15 through the display (step 416), and the process returns to step 402. If the traffic information indicated by the second reference traffic information does not match the traffic information received by the traffic information receiving device 11, the traffic information indicated by the first reference traffic information and the second It is checked whether or not the traffic information indicated by the reference traffic information matches (step 426). If not, the traffic information received by the traffic information receiving device 11 is determined as the traffic information to be presented to the user as it is, and The information is output to the display device 15 via the information output unit 135 and the GUI control unit 17 (step 416), and the process returns to step 402.
[0028]
If the traffic information indicated by the first reference traffic information matches the traffic information indicated by the second reference traffic information, the error counter A is incremented by 1 (step 428). The traffic information indicated by the traffic information is determined as the traffic information to be presented to the user, and displayed on the display device 15 via the traffic information output unit 135 and the GUI control unit 17 (step 430). Then, it is checked whether or not the error counter A has exceeded the error A threshold value Tha (step 432). If the error counter A has not exceeded the threshold A, the process returns to step 402. Then, the traffic information guidance processing ends. The uncalibrated traffic information guidance processing will be described later.
[0029]
Now, returning to step 418, when the inter-vehicle communication device 12 receives the reference traffic information from the reference vehicle, the process first waits for a predetermined time as shown in FIG. 5 (step 502). Then, it is checked whether or not the traffic information receiving device 11 has received the traffic information during the standby period (step 504). If the traffic information has been received, the error counter B is cleared, and the process proceeds to step 410 in FIG. The processing is performed as described above.
[0030]
On the other hand, when the traffic information is not received by the traffic information receiving apparatus 11 during the standby period, the error counter B is incremented by 1 (step 506), and is stored in the received other vehicle information memory 132. Among the traffic information indicated by all the reference traffic information of the received reference traffic information and the reference traffic information received during the standby period, the traffic information with the highest number of matches is determined as the traffic information to be presented to the user. Then, along with the number of matches, the number of reference traffic information received during the standby period, and a message including a sentence indicating that the corresponding vehicle did not receive the corresponding traffic information, the traffic information is output via the traffic information output unit 135 and the GUI control unit 17. A display is output to the display device 15 (step 508). Then, it is checked whether or not the error counter B has exceeded the error B threshold Thb (step 510). If the error counter B has not exceeded the threshold B, the process returns to step 402 in FIG. The vehicle-dependent traffic information guidance processing is started (step 512), and the traffic information guidance processing ends. The other vehicle dependent traffic information guidance processing will be described later.
[0031]
Hereinafter, the non-calibrated traffic information guidance process started in step 434 of FIG. 4 and the other vehicle dependent traffic information guidance process started in step 512 of FIG. 5 will be described.
First, the uncalibrated traffic information guidance processing will be described.
As shown in FIG. 6A, in this process, first, a message notifying the abnormality of the inter-vehicle communication is displayed on the display device 15 via the traffic information output unit 135 and the GUI control unit 17 (step 602). Thereafter, each time the traffic information receiving device 11 receives the traffic information (step 604), the received traffic information is displayed on the display device 15 via the traffic information output unit 135 and the GUI control unit 17 (step 604). 606).
[0032]
Next, the other vehicle dependent traffic information guidance processing will be described.
As shown in FIG. 6B, in this process, first, a message notifying the abnormality of the traffic information receiving device 11 is displayed on the display device 15 via the traffic information output unit 135 and the GUI control unit 17 (step 652).
After that, every time the inter-vehicle communication device 12 receives the reference traffic information from the reference vehicle (step 654), it waits for a predetermined time (step 656), and receives all the reference traffic received after step 654. Among the traffic information indicated by the information, the traffic information with the largest number of matches is determined as the traffic information to be presented to the user, and a traffic information output unit is provided together with a message including the number of matches and the number of reference traffic information received during the waiting period. A process of outputting a display to the display device 15 via the GUI controller 17 and the GUI 135 (step 658) is performed.
[0033]
The embodiments of the present invention have been described above.
According to the above operation, when the in-vehicle information device mounted on a certain vehicle 2 receives the traffic information from the beacon transmitting device 1, it is determined whether or not the traffic information is truly correct as the reference traffic information. It can be verified by comparing with the traffic information received by another vehicle (reference vehicle), which will receive the same traffic information as the own vehicle, received by the inter-vehicle communication. Then, as a result of the verification, when it is estimated that the traffic information received by the own vehicle is incorrect, the traffic information received from the other vehicle by the inter-vehicle communication as the reference traffic information is used instead of the traffic information. And traffic information can be estimated and presented to the user.
[0034]
Also, there is a discrepancy between the traffic information received by the own vehicle and the traffic information received by another vehicle (reference vehicle) that will receive the same traffic information as the own vehicle received by the inter-vehicle communication as the reference traffic information. Based on the continuity, an abnormality in inter-vehicle communication can be detected and the user can be notified. In the above-described embodiment, such a continuation of the mismatch (count exceeding the error threshold value Tha of the error counter A) may be detected as an abnormality of the inter-vehicle communication or the traffic information receiving function.
[0035]
Also, even if the in-vehicle information device mounted on a certain vehicle 2 cannot receive the traffic information from the beacon transmission device 1, the own vehicle is received as reference traffic information by inter-vehicle communication. From the traffic information that would have been received, it is possible to detect the omission of reception of the traffic information, estimate the traffic information that the vehicle should have received, and present it to the user.
[0036]
Further, based on the continuation of the detection of the reception omission, the traffic information receiving device 11 can be regarded as abnormal and the user can be notified of the abnormality.
In the above embodiment, the case where the traffic information processed by the traffic information processing device 13 is the traffic information transmitted from the beacon transmitting device 1 has been described, but in the present embodiment, the traffic information is processed by the traffic information processing device 13. The present invention can be similarly applied to a case where the traffic information is traffic information transmitted by another communication form, for example, FM multiplex broadcasting. For example, when traffic information transmitted by FM multiplex broadcasting is to be processed, the traffic information receiving device 11 is an FM multiplex broadcast receiver, and all other vehicles communicable by inter-vehicle communication are reference vehicles. What should I do?
[0037]
In addition, the legitimacy of information generated by the own device (traffic information received by the traffic information receiving device 11 in the above embodiment) by exchanging information to be processed with another vehicle of the present embodiment by inter-vehicle communication. The technology that uses the information estimated to be correct received from another vehicle instead of the information generated by the own device according to the verification result is an arbitrary technology that is calculated by correlation in a plurality of vehicles 2 other than traffic information. Can be applied as a processing target.
[0038]
For example, by exchanging the current position of the own vehicle with each other through inter-vehicle communication, if the current position received from a plurality of other vehicles and the current position calculated by the own vehicle become larger, the current position calculated by the own vehicle becomes larger. The sensor outputs for detecting the wrong environment or for detecting the surrounding environment of the vehicle (for example, clear cloudy weather, temperature, altitude, etc.) are exchanged with each other by inter-vehicle communication, and the validity is verified. Accordingly, instead of the sensor output of the own device, a sensor output of another vehicle received from another vehicle may be used.
[0039]
Further, in the above description, the traffic information received by the traffic information receiving device 11 is transmitted in a broadcast format. A dynamic network capable of intercommunicating between information devices is constructed, and the traffic information received by the traffic information receiving device 11 is not transmitted in a broadcast format. The information may be transmitted only to the reference vehicle for the vehicle 2 that has received it. It should be noted that such a network is provided in such a manner that each inter-vehicle communication device 12 functions as a relay device or a router that relays communication between the other inter-vehicle communication devices 12 so that vehicles that cannot directly perform inter-vehicle communication can be provided. The inter-vehicle communication device 12 may enable mutual communication.
[0040]
【The invention's effect】
As described above, according to the present invention, it is possible to improve the reliability of the function of the in-vehicle information device that receives traffic information and presents it to the user. Further, even when the own device cannot correctly receive traffic information, it is possible to provide an in-vehicle information device capable of presenting traffic information as appropriate as possible.
[Brief description of the drawings]
FIG. 1 is a diagram showing an example of a road traffic information system according to an embodiment of the present invention.
FIG. 2 is a block diagram illustrating a configuration of an in-vehicle information device according to an embodiment of the present invention.
FIG. 3 is a flowchart showing a procedure of a received traffic information broadcasting process according to the embodiment of the present invention.
FIG. 4 is a flowchart illustrating a procedure of a traffic information guidance process according to the embodiment of the present invention.
FIG. 5 is a flowchart illustrating a procedure of a traffic information guidance process according to the embodiment of the present invention.
FIG. 6 is a flowchart showing a procedure of a non-configuration traffic information guidance process and another vehicle dependent traffic information guidance process according to the embodiment of the present invention.
[Explanation of symbols]
1: beacon transmitting device, 2: vehicle, 10: on-vehicle information device, 11: traffic information receiving device, 12: inter-vehicle communication device, 13: traffic information processing device, 14: navigation device, 15: display device, 16: Input device, 17: GUI control unit, 131: traffic information acquisition unit, 132: received other vehicle information memory, 133: reference information discrimination unit, 134: traffic information calibration unit, 135: traffic information output unit, 141: map data storage , 142: GPS receiver, 143: running state sensor, 144: current running state calculating section, 145: guide route calculating section, 146: running guide processing section.

Claims (8)

An in-vehicle information device mounted on a car and processing traffic information,
A traffic information receiving device for receiving traffic information;
An inter-vehicle communication device that performs wireless communication with an in-vehicle information device mounted on another vehicle,
Reference information transmitting means for transmitting the traffic information received by the traffic information receiving device as reference information from the inter-vehicle communication device to the in-vehicle information device mounted on another vehicle,
An error of the traffic information received by the traffic information receiving device is determined based on the traffic information received by the traffic information receiving device and reference information received from an in-vehicle information device mounted on another vehicle by the inter-vehicle communication device. An on-vehicle information device, comprising: traffic information verification means. The in-vehicle information device according to claim 1,
If the traffic information verification unit determines that the traffic information received by the traffic information receiving device is incorrect, the traffic information indicated by the reference information received from the on-vehicle information device mounted on another vehicle by the inter-vehicle communication device. An in-vehicle information device comprising an alternative traffic information presenting means for presenting information to a user as an alternative to the traffic information received by the traffic information receiving device. An in-vehicle information device mounted on a car and processing traffic information,
A traffic information receiving device for receiving traffic information;
An inter-vehicle communication device that performs wireless communication with an in-vehicle information device mounted on another vehicle,
Reference information transmitting means for transmitting the traffic information received by the traffic information receiving device as reference information from the inter-vehicle communication device to the in-vehicle information device mounted on another vehicle,
When the reference information transmitted from the in-vehicle information device mounted on another vehicle is received by the inter-vehicle communication device, the traffic information receiving device does not receive the traffic information corresponding to the traffic information indicated by the reference information. An in-vehicle information device having an alternative traffic information presenting means for presenting the traffic information indicated by the reference information to the user. The inter-vehicle communication device according to claim 3, wherein
When the reference information transmitted from the in-vehicle information device mounted on another vehicle is received by the inter-vehicle communication device, the traffic information corresponding to the traffic information indicated by the reference information is not received by the traffic information receiving device. An in-vehicle information device, comprising: a failure detection unit configured to detect a failure of the traffic information receiving device when the frequency exceeds a predetermined frequency. The in-vehicle information device according to claim 2, 3, or 4,
The alternative traffic information presenting means, when there is a plurality of reference information received from the in-vehicle information device mounted on another vehicle in the inter-vehicle communication device, from among the plurality of traffic information indicated by the plurality of reference information, An in-vehicle information device characterized by selecting traffic information with the largest number of other matching traffic information and presenting it to the user. The in-vehicle information device according to claim 1, 2, 3, 4, or 5,
The in-vehicle information device, wherein the traffic information receiving device is a beacon receiver that receives the traffic information from a fixedly installed beacon transmitter. A method for verifying the validity of the received information in an in-vehicle information device that is mounted on an automobile and receives and processes information transmitted from a predetermined information transmission system,
Receiving information transmitted from the predetermined information transmission system;
Transmitting the information received from the predetermined information transmission system by wireless communication as reference information to an in-vehicle information device mounted on another vehicle,
Information received from the predetermined information transmission system, based on information received from the predetermined information transmission system and reference information received from an in-vehicle information device mounted on another vehicle which is presumed to receive the same information as the own vehicle; Determining the error of the received information. A method of processing the received information in an in-vehicle information device that is mounted on an automobile and processes information transmitted from a predetermined information transmission system,
Receiving information transmitted from the predetermined information transmission system;
Transmitting the information received from the predetermined information transmission system by wireless communication as reference information to an in-vehicle information device mounted on another vehicle,
When receiving reference information from an in-vehicle information device mounted on another vehicle that is estimated to receive the same information as the other vehicle and the own vehicle is the other vehicle, the information corresponding to the information indicated by the reference information is referred to as Processing the information indicated by the reference information as a substitute for the information received from the predetermined information transmission system when the information is not received from the predetermined information transmission system. .

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