JP3455781B2 - Road-to-vehicle communication method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention transmits information to a vehicle in order to detect a faulty vehicle on the road, an obstacle such as a falling object, or an oncoming vehicle at a poor visibility point such as a curve and notify the driver of the vehicle. The present invention relates to a road-to-vehicle communication method when doing.

[0002]

2. Description of the Related Art Conventionally, in order to select information from a plurality of roadside communication devices having different service levels, a driver manually selects a channel of a radio device of an in-vehicle device, or a plurality of roadside communication devices are supported. It was necessary to use multiple on-board devices.

In the conventional system as described above, in the case where the driver manually selects, for example, in a service such as assistance for safe driving which provides obstacle information such as the presence of a broken vehicle ahead of a curve, from the viewpoint of real time. There was a problem. Further, when using a plurality of in-vehicle devices, there is a problem in terms of cost of the in-vehicle device, installation space, complicated drivers, and the like.

[0004]

SUMMARY OF THE INVENTION The present invention has been made in order to solve such problems, and includes an old roadside communication device having a low information providing service level and a new roadside communication device having a high information providing service level. However, when the service is provided at the same point at the same time, the in-vehicle device that receives and displays the service information transmitted from the old roadside communication device and the new roadside communication device must always display the service information from the new roadside communication device. It is an object of the present invention to provide a road-to-vehicle communication method .

[0005]

The invention according to claim 1
Is an old roadside communication device having a low information providing service level, a new roadside communication device having a high information providing service level, and the old roadside in an information providing service for a vehicle traveling on a road from a roadside communication device installed on the roadside. In a road-to-vehicle communication method including a communication device and an in-vehicle device that receives and displays information transmitted from the new roadside communication device,
The old roadside communication device and the new roadside communication device are the same
If the information providing service is being provided to the vehicle at the same point at the same time, the fact that the information providing service of the new roadside communication device is being provided is notified to the in-vehicle device of the vehicle.
Serial by notifying the old roadside communication device, the said vehicle unit is a road-to-vehicle communication method characterized by always displaying the service information from the new roadside communication device. Claim 2
The invention according to claim 1 is the information providing service according to claim 1.
Is obstacle information, and the information service level is an obstacle.
It is the positional accuracy of information. The invention according to claim 3 is a claim
In item 2, the obstacle is a vehicle with a forward failure.

[0006]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a diagram showing a concept of operation of the present invention, in which 1 is a road, 2 is a lane, 3 is an old roadside communication device, 4 is a new roadside communication device, 5 is a vehicle, 6 is a broken vehicle, and 7 is a vehicle.
Is the communication area.

A vehicle 5 is traveling in the direction of arrow A on the lane 2 of the road 1, and a broken vehicle 6 is stopped on the lane 2 near the exit of the curve. The old roadside communication device 3 is a roadside communication device that provides old services, communicates with the vehicle 5 in a relatively narrow communication area 7a, and transmits the position information and the like of the failed vehicle 6 to the vehicle 5, but the communication area 7a is narrow. In some cases, when a broken vehicle is moving, it is not possible to continuously provide the information, and thus this information becomes relatively inaccurate over time. The new roadside communication device 4 is a roadside communication device that provides a new service. The new roadside communication device 4 communicates with the vehicle 5 in a relatively wide communication area 7b and transmits the position information of the failed vehicle 6 to the vehicle 5, but the communication area 7b is wide. In some cases, even if the defective vehicle is in motion, the information corresponding to the motion can be continuously provided, so that this information is relatively accurate. Therefore, the vehicle 5 displays only the service information from the new roadside communication device 4 having high information accuracy.

FIG. 2 is a diagram showing the configuration of the in-vehicle apparatus of the present invention. The old service radio 9 for receiving information from the old roadside communication apparatus 3 and the new service for receiving information from the new roadside communication apparatus 4 are shown in FIG. Communication controller 11 for controlling service radio 10, old service radio 9 or new service radio 10.
And a display device 12 for displaying the received service information.

FIG. 3 is a sequence diagram showing the operation of the present invention. Communication is performed with the new roadside communication device 4 when the vehicle-mounted device 8 receives the service provided by the old roadside communication device 3 and the new roadside communication device 4. This is the operation to be performed. The operation sequence will be described with reference to FIGS. 2 and 3. Old roadside communication device 3
The new roadside communication device 4 and the new roadside communication device 4 respectively provide services and constantly send service notifications. The in-vehicle device 8 receives the service notification from the old roadside communication device 3 by the old service wireless device 9, and receives the service notification from the new roadside communication device 4 by the new service wireless device 10. Service notifications from the old service radio 9 and the new service radio 10 are output to the communication control device 11. Here, the communication control device 11 recognizes one of the service notifications first according to the timing of receiving the radio wave carrying the service notification information from the old roadside communication device 3 and the new roadside communication device 4. However, the description will proceed assuming that the service notification from the old roadside communication device 3, which is the output from the old service wireless device 9, is recognized first. The communication control device 11 outputs a communication connection request to the old service radio device 9, and the old service radio device 9 transmits the communication connection request to the old roadside communication device 3. The old roadside communication device 3 transmits a communication connection response to the vehicle-mounted device 8 if communication is possible. Here, information indicating that the service is provided by the new roadside communication device 4 is added to the communication connection response.
In the vehicle-mounted device 8, the old service radio 9 receives the communication connection response from the old roadside communication device 3 and inputs it to the communication control device 11. When the communication control device 11 analyzes the content of the communication connection response and recognizes that the new roadside communication device 4 is providing the service, it determines that the old roadside communication device 3 is not communicating and cancels the communication connection. Output to the old service radio 9. The old service radio 9 transmits a communication connection stop to the old roadside communication device 3 to stop the communication connection. In this series of processing, the service notification from the old roadside communication device 3 is transmitted to the in-vehicle device 8
It is executed every time it is recognized by the communication control device 11.

Next, the description will proceed assuming that the communication control device 11 of the in-vehicle device 8 has recognized the service notification from the new roadside communication device 4 which is the output from the new service radio device 10.
The communication control device 11 outputs a communication connection request to the new service radio device 10, and the new service radio device 10 transmits the communication connection request to the new roadside communication device 4. The new roadside communication device 4 transmits a communication connection response to the vehicle-mounted device 8 if communication is possible. In the vehicle-mounted device 8, the new service radio 10 receives the communication connection response from the new roadside communication device 4, and inputs it to the communication control device 11. Since the communication connection is completed here, the in-vehicle device 8 thereafter communicates with the new roadside communication device 4 to receive the service information by the new service radio 10 and input it to the communication control device 11. The communication control device 11 performs format conversion of the service information and outputs the service information to the display device 12. The display device 12 transmits the service information to the driver by displaying it on a screen such as a display or by voice.

[0011]

According to the present invention, in a service for providing obstacle information such as a vehicle in front failure to a vehicle traveling on a road from a roadside communication device installed on the roadside,
For example, an old roadside communication device having a low information providing service level such as low positional accuracy of obstacle information provided, and a new roadside communication device having a high information providing service level such as high positional accuracy of obstacle information provided, In a road-to-vehicle communication method including an on-vehicle device that receives and displays information transmitted from the old roadside communication device and the new roadside communication device, the old roadside communication device and the new roadside communication device simultaneously provide an information providing service. If yes, the old roadside communication indicates that the information providing service of the new roadside communication device is being performed.
By notifying the vehicle from the device , the vehicle
Since the in- vehicle device always displays the service information from the new roadside communication device, it is possible to automatically display the new service information in one in-vehicle device.

[Brief description of drawings]

FIG. 1 is a diagram showing a concept of operation of a road-to-vehicle communication method of the present invention.

FIG. 2 is a configuration diagram of an in-vehicle device of the road-vehicle communication method of the present invention.

FIG. 3 is a sequence diagram showing an operation of the road-vehicle communication method of the present invention.

[Explanation of symbols]

1 road 2 lanes 3 Old roadside communication device 4 New roadside communication equipment 5 vehicles 6 broken vehicle 7 Communication area 8 In-vehicle device 9 Old service radio 10 New service radio 11 Communication control device 12 Display

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Claims (3)

(57) [Claims] 1. An information providing service for a vehicle traveling on a road from a roadside communication device installed on the roadside,
It is composed of an old roadside communication device having a low information providing service level, a new roadside communication device having a high information providing service level, and an in-vehicle device that receives and displays information transmitted from the old roadside communication device and the new roadside communication device. In the road-to-vehicle communication method , the old roadside communication device and the new roadside communication device are the same.
If the information providing service is being provided to the vehicle at the same point at the same time, the fact that the information providing service of the new roadside communication device is being provided is notified to the in-vehicle device of the vehicle.
The road-to-vehicle communication method , wherein the vehicle-mounted device always displays the service information from the new roadside communication device by notifying from the old roadside communication device . 2. The information providing service is obstacle information,
The road-to-vehicle communication method according to claim 1, wherein the information providing service level is the position accuracy of the obstacle information. 3. The road-to-vehicle communication method according to claim 2, wherein the obstacle is a vehicle in front failure.