JP2020194461A - Roadside machine, on-vehicle machine, and traffic communication system - Google Patents

Abstract

To provide a roadside machine, an on-vehicle machine, and a traffic communication system allowing road-vehicle communication to be applied to an on-vehicle camera control.SOLUTION: A roadside machine 200 used in a traffic communication system comprises: a communication section 21 performing radio communication with a vehicle traveling on a road; and a processor 22a acquiring a pick-up image from a first camera installed around the road. The processor 22a transmits a signal for changing photography conditions of a second camera equipped in the vehicle from the communication section 21 when the vehicle 100 is under a specific condition based on the pick-up image.SELECTED DRAWING: Figure 2

Description

The present invention relates to a roadside unit, an on-board unit, and a transportation communication system.

Patent Document 1 describes a traffic communication system that performs wireless communication (that is, road-to-vehicle communication) between a roadside device that is a communication device installed on the roadside and an in-vehicle device that is a communication device mounted on a vehicle. ing.

In this traffic communication system, signal information indicating a lighting signal of a traffic signal at an intersection is transmitted from a roadside unit to an in-vehicle unit. When the on-board unit determines that the predetermined arrow signal is lit based on the signal information received from the roadside unit, the on-board unit enlarges and displays the arrow signal on the display as driving assistance.

Japanese Unexamined Patent Publication No. 2012-48293

In recent years, in-vehicle cameras have become widespread in applications such as electronic mirrors and drive recorders.

However, although the traffic communication system described in Patent Document 1 supports the driving of a vehicle by using a roadside machine, it does not consider the existence of an in-vehicle camera, so that road-to-vehicle communication cannot be utilized for in-vehicle camera control. There's a problem.

Therefore, an object of the present invention is to provide a roadside unit, an in-vehicle device, and a traffic communication system that enable road-to-vehicle communication to be utilized for in-vehicle camera control.

The roadside unit according to the first aspect is a roadside unit used for a traffic communication system, and is an image captured by a communication unit that performs wireless communication with a vehicle passing through the road and a first camera installed around the road. With at least one processor to obtain. When the at least one processor determines that the vehicle is under a specific situation based on the captured image, the communication unit transmits a signal for changing the shooting conditions of the second camera included in the vehicle.

The roadside unit according to the second aspect is a roadside unit used for a traffic communication system, and transmits a communication unit that performs wireless communication with a vehicle passing through the road and a signal for changing the shooting conditions of a camera included in the vehicle. It includes at least one processor that transmits from the communication unit.

The on-board unit according to the third aspect is an on-board unit used for a traffic communication system, and a notification unit for notifying the occupants of the vehicle and a signal for changing the shooting conditions of the camera included in the vehicle are transmitted from the roadside unit. A communication unit for receiving and at least one processor for notifying the notification unit to change the shooting conditions of the camera when the shooting conditions are different from the shooting conditions currently set for the camera. ..

The traffic communication system according to the fourth aspect includes a roadside machine and a vehicle according to the first aspect.

According to one aspect of the present invention, it is possible to provide a roadside unit, an in-vehicle device, and a traffic communication system that enable road-to-vehicle communication to be utilized for in-vehicle camera control.

It is a figure which shows the structure of the traffic communication system which concerns on one Embodiment. It is a figure which shows the structure of the roadside machine which concerns on one Embodiment. It is a figure which shows the structure of the vehicle which concerns on one Embodiment. It is a figure which shows the angle of view (before change) of the vehicle-mounted camera which concerns on one Embodiment. It is a figure which shows the angle of view (after change) of the vehicle-mounted camera which concerns on one Embodiment. It is a flow chart which shows the operation of the roadside machine which concerns on one Embodiment. It is a figure which shows the example of the specific situation which concerns on one Embodiment. It is a flow figure which shows the operation of the in-vehicle device which concerns on one Embodiment. It is a figure which shows the operation in one Example.

The transportation communication system according to the embodiment will be described with reference to the drawings. In the description of the drawings below, the same or similar parts are designated by the same or similar reference numerals.

(Composition of transportation communication system)
First, the configuration of the transportation communication system according to the embodiment will be described. FIG. 1 is a diagram showing a configuration of a transportation communication system 1 according to an embodiment.

As shown in FIG. 1, the traffic communication system 1 includes a vehicle 100 passing through a road and a roadside machine 200 installed on the roadside around the road. In FIG. 1, vehicles 100A and 100B are illustrated as vehicles 100, and roadside machines 200A and 200B are illustrated as roadside machines 200. Although the vehicle 100 is an example of an automobile such as an ordinary automobile or a light automobile, it may be a vehicle passing through a road, for example, a motorcycle (motorcycle) or the like.

Each vehicle 100 is equipped with an in-vehicle device 150 that performs wireless communication. The on-board unit 150 performs road-to-vehicle communication with the roadside unit 200.

The roadside machine 200 is installed around the road. The roadside machine 200 may be installed at each intersection on a general road or on the roadside of an expressway, but the case where the roadside machine 200 is installed around an intersection will be mainly described below.

In the example shown in FIG. 1, the roadside unit 200A is installed on a traffic signal (traffic signal lamp) 300 or a support column thereof, and operates in cooperation with the traffic signal 300. For example, the roadside unit 200A transmits a radio signal including signal information regarding the traffic signal 300 to the vehicle 100 (vehicle-mounted unit 150).

For such road-to-vehicle communication, wireless communication by broadcasting to an unspecified number of destinations may be used. Alternatively, for road-to-vehicle communication, wireless communication by multicast with a specific majority as a destination may be used, or wireless communication by unicast with a specific singular as a destination may be used.

Each roadside unit 200 is connected to the central device 400 via a communication line. A vehicle detector installed on the roadside may be connected to the central device 400 via a communication line. The central device 400 receives vehicle information from each roadside unit 200, including the position and speed of the vehicle 100 received by the roadside unit 200 from the on-board unit 150. The central device 400 may further receive vehicle detection information from roadside sensors installed on each road.

The central device 400 collects and processes various types of traffic information based on the received information, and integrates and manages road traffic. For example, the central device 400 may transmit signal information to instruct the traffic signal 300 to switch the light color.

(Structure of roadside machine)
Next, the configuration of the roadside machine 200 according to the embodiment will be described. FIG. 2 is a diagram showing a configuration of a roadside machine 200 according to an embodiment.

As shown in FIG. 2, the roadside machine 200 has a communication unit 21, a control unit 22, and an interface 23.

The communication unit 21 has an antenna 21a, a reception unit 21b, and a transmission unit 21c, and performs wireless communication via the antenna 21a. The communication unit 21 performs road-to-vehicle communication with the vehicle 100 (vehicle-mounted device 150). As mentioned above, road-to-vehicle communication is unicast, broadcast, or multicast.

The antenna 21a may be an omnidirectional antenna or a directional antenna having directivity. The antenna 21a may be an adaptive array antenna whose directivity can be dynamically changed.

The communication unit 21 has a reception unit 21b that converts the radio signal received by the antenna 21a into received data and outputs the radio signal to the control unit 22. Further, the communication unit 21 has a transmission unit 21c that converts the transmission data output by the control unit 22 into a wireless signal and transmits it from the antenna 21a.

The wireless communication method of the communication unit 21 may be a method compliant with the T109 standard of ARIB (Association of Radio Industries and Businesses), or V2X (Vehice-) of 3GPP (Third Generation Partnership Project). It may be a method compliant with the wireless LAN (Local Area Network) standard such as the IEEE (Institute of Electrical and Electronics Engineers) 802.11 series. The communication unit 21 may be configured to support all of these communication standards.

The control unit 22 controls various functions of the roadside machine 200. The control unit 22 has at least one memory 22b and at least one processor 22a electrically connected to the memory 22b. The memory 22b includes a volatile memory and a non-volatile memory, and stores information used for processing in the processor 22a and a program executed by the processor 22a. The processor 22a performs various processes by executing the program stored in the memory 22b.

The interface 23 is connected to the roadside camera 500 and the signal controller 600 by wire or wirelessly. The interface 23 is also connected to the centralized device 400.

The roadside camera 500 is a camera (first camera) installed on the roadside around the road. The roadside camera 500 images the road and the vehicle 100 passing through the road. The roadside camera 500 outputs the captured image to the control unit 22 via the interface 23. The captured image shall be a moving image. Although FIG. 2 shows an example in which the roadside camera 500 is configured separately from the roadside machine 200, the roadside camera 500 may be integrally configured with the roadside machine 200.

The signal controller 600 is a device that controls the traffic signal 300. The signal controller 600 may be configured separately from the traffic signal 300, or may be integrally configured with the traffic signal 300. Alternatively, the signal controller 600 may be integrally configured with the roadside unit 200. The signal controller 600 outputs signal information regarding the signal light color for each step of the traffic signal 300 to the control unit 22 via the interface 23. The staircase is the smallest unit for switching the signal display at one intersection.

In the roadside machine 200 configured in this way, the processor 22a acquires the captured image from the roadside camera 500, and if it is determined that the vehicle 100 is under a specific situation based on the captured image, the second vehicle 100 is provided. A signal for changing the shooting conditions of the camera is transmitted from the communication unit 21. For example, the signal for changing the shooting conditions is a signal for widening the angle of view of the camera (vehicle-mounted camera) included in the vehicle 100. Details of such an operation will be described later.

(Vehicle configuration)
Next, the configuration of the vehicle 100 according to the embodiment will be described. FIG. 3 is a diagram showing a configuration of a vehicle 100 according to an embodiment.

As shown in FIG. 3, the vehicle 100 includes a communication unit 11, a GNSS (Global Navigation Satellite System) receiver 12, a notification unit 13, at least one camera 14, a drive control unit 15, and a control unit 16. Has.

The communication unit 11 has an antenna 11a, a reception unit 11b, and a transmission unit 11c, and performs wireless communication via the antenna 11a. The communication unit 11 performs road-to-vehicle communication with the roadside unit 200. As mentioned above, road-to-vehicle communication is unicast, broadcast, or multicast.

The communication unit 11 has a reception unit 11b that converts the radio signal received by the antenna 11a into received data and outputs the radio signal to the control unit 16. Further, the communication unit 11 has a transmission unit 11c that converts the transmission data output by the control unit 16 into a wireless signal and transmits it from the antenna 11a.

The wireless communication method of the communication unit 11 may be a method compliant with the T109 standard of ARIB, a method compliant with the V2X standard of 3GPP, or a wireless LAN standard compliant with the IEEE802.11 series or the like. It may be the method described above. The communication unit 11 may be configured to be compatible with all of these communication standards.

The GNSS receiver 12 performs positioning based on the GNSS satellite signal, and outputs GNSS position information indicating the current geographical position (latitude / longitude) of the vehicle 100 to the control unit 16.

The notification unit 13 notifies the driver of the vehicle 100 of the information under the control of the control unit 16. The notification unit 13 has a display 13a for displaying information and a speaker 13b for outputting information by voice.

The camera 14 is a camera (second camera) installed in the vehicle 100. For example, the camera 14 includes a side camera that images the diagonally rearward and lateral directions of the vehicle, and a rear camera that images the rear part of the vehicle. The camera 14 may further include a front camera that captures the front of the vehicle. The camera 14 outputs the captured image to the control unit 16. The captured image shall be a moving image.

In one embodiment, the camera 14 is used for an electronic mirror function that replaces the physical side mirrors and inner mirrors. Specifically, the control unit 16 causes the display 13a to display the captured image from the camera 14 in real time. The camera 14 may be used for the drive recorder function. Specifically, the control unit 16 stores the captured image from the camera 14 in the memory 16b or an external storage medium.

The drive control unit 15 controls an engine or motor as a power source, a power transmission mechanism, a brake, and the like. When the vehicle 100 is an autonomous driving vehicle, the drive control unit 15 may control the drive of the vehicle 100 in cooperation with the control unit 16.

The control unit 16 controls various functions in the vehicle 100 (vehicle-mounted device 150). The control unit 16 has at least one memory 16b and at least one processor 16a electrically connected to the memory 16b. The memory 16b includes a volatile memory and a non-volatile memory, and stores information used for processing in the processor 16a and a program executed by the processor 16a. The processor 16a performs various processes by executing the program stored in the memory 16b.

In one embodiment, the communication unit 11, the GNSS receiver 12, and the notification unit 13 constitute an on-board unit 150. The on-board unit 150 may include the camera 14.

In the vehicle-mounted device 150 configured in this way, the communication unit 11 receives a signal from the roadside device 200 for changing the shooting conditions of the camera 14 (vehicle-mounted camera) included in the vehicle 100. For example, the signal for changing the shooting conditions is a signal for widening the angle of view of the camera 14. When the shooting conditions indicated by the received signal are different from the shooting conditions currently set for the camera 14, the processor 16a causes the notification unit 13 to notify that the shooting conditions of the camera 14 will be changed. Details of such an operation will be described later.

(Angle of view of in-vehicle camera)
Next, the angle of view of the in-vehicle camera according to the embodiment will be described. 4 and 5 are views showing the angle of view of the vehicle-mounted camera according to the embodiment.

As shown in FIG. 4, the vehicle 100 includes a left side camera 14L, a right side camera 14R, and a rear camera 14B.

The left side camera 14L images the direction diagonally behind the left side of the vehicle 100. The right side camera 14R images the direction diagonally rearward to the right of the vehicle 100. As a default setting, the angle of view of the left side camera 14L and the right side camera 14R is α1.

The rear camera 14B images the rear of the vehicle 100. As a default setting, the angle of view of the rear camera 14B is α2.

As shown in FIG. 5, the vehicle 100 according to the embodiment widens the angle of view of the vehicle-mounted camera based on the signal from the roadside machine 200. Specifically, the angle of view of the left side camera 14L and the right side camera 14R is widened to α11 (α11> α1), and the angle of view of the rear camera 14B is widened to α21 (α21> α2).

(Operation of roadside machine)
Next, the operation of the roadside machine 200 according to the embodiment will be described. FIG. 6 is a flow chart showing the operation of the roadside machine 200 according to the embodiment.

As shown in FIG. 6, in step S11, the processor 22a acquires the captured image from the roadside camera 500.

In step S12, the processor 22a performs image recognition processing on the image captured by the roadside camera 500. For image recognition, pattern matching technology and image recognition technology based on learning such as reinforcement learning (for example, knowledge base, statistics base, neural network base) can be applied. For example, the processor 22a extracts the vehicle and the pedestrian in the captured image and identifies the situation of the vehicle and the pedestrian.

In step S13, the processor 22a acquires the signal information. The process of step S13 is not essential and may be omitted. Further, step S13 may be performed before step S11.

In step S14, the processor 22a determines whether or not the vehicle 100 is under a specific situation, at least based on the captured image. The specific situation means a situation in which the attention of the occupant (driver) of the vehicle 100 is desired to be spread over a wide area. The specific situation can also be considered as a situation in which the possibility of an accident related to the vehicle 100 is increasing.

FIG. 7 is a diagram showing an example of a specific situation according to an embodiment.

As shown in FIG. 7, the specific situation may include a situation where an emergency vehicle, a motorcycle, or a pedestrian is approaching the vehicle 100. For example, the processor 22a recognizes an emergency vehicle, a two-wheeled vehicle, or a pedestrian approaching to the side or the rear of the vehicle 100 by image recognition processing. Then, the processor 22a determines that the vehicle 100 is under a specific situation when an emergency vehicle, a motorcycle, or a pedestrian is approaching to the side or the rear of the vehicle 100. The emergency vehicle is, for example, a police car or an ambulance that is moving while sounding a siren.

The specific situation may include a situation in which a vibration of a certain magnitude is detected for a certain period of time. In this case, the specific situation corresponds to the situation where a large earthquake is detected. For example, the processor 22a recognizes the blurring of the captured image and the blurring width thereof by the image recognition processing, and when the blurring (vibration) of a certain magnitude is recognized for a certain period of time, the vehicle 100 is under a specific situation. judge. When the roadside machine 200 is provided with a vibration sensor, the vibration sensor may also be used in combination to make a determination.

The specific situation may include a situation in which traffic congestion is occurring. For example, the processor 22a recognizes the average vehicle speed of each vehicle on the road on which the vehicle 100 passes by image recognition processing, and when the vehicle speed below a certain speed continues for a certain period of time, the vehicle 100 is under a specific situation. Judge that there is. The processor 22a may make such a determination when the traffic signal 300 indicates the progress permission in consideration of the signal information.

The specific situation may include a situation in which a traffic accident has occurred. For example, when the processor 22a recognizes a traffic accident on the road through which the vehicle 100 passes or in the vicinity of the road by image recognition processing, the processor 22a determines that the vehicle 100 is under a specific situation.

The specific situation may include a situation in which the vehicle 100 is stopped and the vehicle 100 can proceed. For example, in the processor 22a, when the traffic signal 300 indicates the progress permission of the vehicle 100 based on the signal information and the vehicle 100 is stopped for a certain period of time based on the captured image, the vehicle 100 is under a specific situation. Is determined.

If it is determined that the vehicle 100 is under a specific situation (step S14: YES), the process proceeds to step S15, otherwise (step S14: NO), the process returns to step S11.

In step S15, the processor 22a determines the transmission method used for transmission to the vehicle 100 based on the content (type) of the specific situation.

As shown in FIG. 7, when a situation in which an emergency vehicle, a two-wheeled vehicle, or a pedestrian is approaching the vehicle 100 is detected, the processor 22a indicates at least one of the angle of view enlargement and the resolution increase as an instruction to the vehicle 100. One is determined, and unicast is determined as a transmission method used for transmission to the vehicle 100. However, when a plurality of emergency vehicles, motorcycles, or vehicles 100 approaching pedestrians are detected, the processor 22a may determine multicast for these plurality of vehicles.

Here, the angle of view enlargement means transmitting a signal for widening the angle of view of the in-vehicle camera from the communication unit 21 as a signal for changing the shooting conditions of the in-vehicle camera. By transmitting such a signal, the driver's attention can be spread over a wide area under the premise that the in-vehicle camera is used for the electronic mirror function. Specifically, normally, the driver's attention is directed backward using the angle of view as shown in FIG. 4, and under specific circumstances, the angle of view is widened as shown in FIG. 5 to spread the driver's attention to the side. be able to.

The resolution increase means that the communication unit 21 transmits a signal for increasing the resolution of the in-vehicle camera as a signal for changing the shooting conditions of the in-vehicle camera. By transmitting such a signal, it is possible to increase the evidence value of the captured image to be recorded under the premise that the in-vehicle camera is used for the drive recorder function. Specifically, it is possible to record a high resolution captured image under a specific situation while usually recording a captured image using a low resolution in order to save storage capacity.

When a situation is detected in which vibration of a certain magnitude is detected for a certain period of time, the processor 22a determines at least one of the angle of view enlargement and the resolution increase as an instruction to the vehicle 100, and the vehicle 100 is instructed. The broadcast is determined as the transmission method used for the transmission of. In the event of a large earthquake, it is preferable to target as many vehicles as possible, so broadcast is decided as the transmission method.

When a situation in which traffic congestion is occurring is detected, the processor 22a determines the resolution increase as an instruction to the vehicle 100 and the broadcast as a transmission method used for transmission to the vehicle 100. However, the processor 22a may determine the angle of view expansion as an instruction to the vehicle 100.

When a situation in which a traffic accident has occurred is detected, the processor 22a determines at least one of the angle of view enlargement and the resolution increase as an instruction to the vehicle 100, and broadcasts as a transmission method used for transmission to the vehicle 100. To determine.

When the vehicle 100 is stopped and a situation in which the vehicle 100 can proceed is detected, the processor 22a determines at least one of the angle of view enlargement and the resolution increase as an instruction to the vehicle 100, and the vehicle 100 is instructed. Unicast is determined as the transmission method used for transmission of. However, when a plurality of vehicles 100 in the same situation are detected, the processor 22a may determine multicast for these plurality of vehicles.

If the broadcast is determined (step S15: YES), the process proceeds to step S16, otherwise (step S15: NO), the process proceeds to step S17. In step S16, the processor 22a broadcasts a signal including instructions to the vehicle 100. On the other hand, in step S17, the processor 22a transmits a signal including an instruction to the vehicle 100 by unicast or multicast.

(Operation of in-vehicle device)
Next, the operation of the vehicle-mounted device 150 according to the embodiment will be described. FIG. 8 is a flow chart showing the operation of the vehicle-mounted device 150 according to the embodiment.

As shown in FIG. 8, in step S21, whether or not the communication unit 11 has received a signal for changing the shooting conditions (that is, the angle of view and / or the resolution) of the camera 14 which is an in-vehicle camera. To judge.

When the communication unit 11 receives a signal for changing the shooting conditions of the camera 14 (step S21: YES), in step S22, the processor 16a presents the shooting conditions indicated by this signal to the camera 14. Judge whether the shooting conditions are different from the set shooting conditions.

If they are different (step S22: YES), the process proceeds to step S23, otherwise (step S22: NO), the process proceeds to step S24.

In step S23, the processor 16a notifies the notification unit 13 that the shooting conditions of the camera 14 are to be changed. For example, the processor 16a causes the display 13a and / or the speaker 13b to output information to increase the angle of view of the camera 14 and / or to increase the resolution of the camera 14. As a result, it is possible to arouse the attention of the occupant (driver) and notify the occupant that there is an instruction from the outside. Here, the processor 16a may proceed to step S24 when there is a confirmation operation from the occupant.

In step S24, the processor 16a changes the shooting conditions of the camera 14 according to the signal received by the communication unit 11.

The processor 16a may return the shooting conditions of the camera 14 to the original settings (for example, the default settings) after a certain period of time has elapsed after receiving the signal for changing the shooting conditions of the camera 14. ..

Alternatively, the roadside machine 200 (processor 22a) transmits a signal for restoring the shooting conditions of the camera 14 to the vehicle 100, and the processor 16a sets the shooting conditions of the camera 14 to the original in response to the reception of this signal. You may return to.

(Example)
Next, one embodiment will be described. FIG. 9 is a diagram showing an operation in one embodiment.

As shown in FIG. 9, at the intersection, the arrow signal 300a for permitting a right turn is lit, but the vehicle 100 is stopped in front of the stop line without the occupant noticing this signal. Such a situation corresponds to a situation in which the vehicle 100 is stopped and the vehicle 100 can proceed.

Under such circumstances, the following vehicle of the vehicle 100 may be urged to call attention / start by honking or blinking a light, and the vehicle 100 may suddenly start. In such a case, the attention of the occupant is directed to the start, the confirmation of blind spots such as left turn and right turn is neglected, and it is easy to cause an accident involving a pedestrian or a two-wheeled vehicle.

Therefore, the roadside machine 200 is unicast so as to widen the angle of view of the camera 14 with respect to the stopped vehicle 100 under the condition that the arrow signal is output and there is no traffic jam in the traveling direction of the vehicle 100. Instruct with to display a wide range of images. As a result, the attention of the occupants can be expanded to a wide range, and the occurrence of accidents involving pedestrians and motorcycles can be suppressed.

(Other embodiments)
In the above-described embodiment, the roadside machine 200 may include information for identifying the lane to be the target of the signal in the signal broadcast to the vehicle 100. The information for identifying the lane may be lane identification or information indicating the vehicle moving direction. As a result, it is possible to prevent more vehicles 100 from receiving and processing the broadcast signal than necessary.

Further, in the above-described embodiment, when a unicast signal is transmitted to the vehicle 100, the roadside machine 200 acquires address information and position information (and speed information) from the vehicle 100, and uses the position information as an captured image. By collating, the vehicle in the captured image and the address information may be associated with each other, and the unicast signal may be transmitted based on this association.

Alternatively, the roadside machine 200 recognizes the license plate in the captured image and transmits a signal including the license plate information including the license plate (and the character string) described in the license plate as the destination information to transmit unicast. May be realized. When the vehicle 100 receives a signal including destination information matching its license plate information, the vehicle 100 changes the shooting conditions according to this signal.

A program may be provided that causes the computer to execute each process performed by the on-board unit 150 or the roadside unit 200. The program may be recorded on a computer-readable medium. Computer-readable media can be used to install programs on a computer. Here, the computer-readable medium on which the program is recorded may be a non-transient recording medium. The non-transient recording medium is not particularly limited, but may be, for example, a recording medium such as a CD-ROM or a DVD-ROM.

Further, a circuit for executing each process performed by the on-board unit 150 or the roadside unit 200 may be integrated, and at least a part of the on-board unit 150 or the roadside unit 200 may be configured as a semiconductor integrated circuit (chipset, SoC).

Although the embodiments have been described in detail with reference to the drawings, the specific configuration is not limited to the above, and various design changes and the like can be made without departing from the gist.

1: Traffic communication system 11: Communication unit 11a: Antenna 11b: Receiver 11c: Transmission unit 12: GNSS receiver 13: Notification unit 13a: Display 13b: Speaker 14: Camera 14B: Rear camera 14L: Left side camera 14R: Right Side camera 15: Drive control unit 16: Control unit 16a: Processor 16b: Memory 21: Communication unit 21a: Antenna 21b: Reception unit 21c: Transmission unit 22: Control unit 22a: Processor 22b: Memory 23: Interface 100: Vehicle 150: In-vehicle device 200: Roadside machine 300: Traffic signal 300a: Arrow signal 400: Central device 500: Roadside camera 600: Signal controller

Claims (13)

A roadside machine used for traffic communication systems
A communication unit that performs wireless communication with vehicles passing through the road,
It comprises at least one processor that acquires an image captured by a first camera installed around the road.
When the at least one processor determines that the vehicle is under a specific situation based on the captured image, the communication unit transmits a signal for changing the shooting conditions of the second camera included in the vehicle. Roadside machine. The roadside machine according to claim 1, wherein the specific situation includes a situation in which an emergency vehicle, a motorcycle, or a pedestrian is approaching the vehicle. The roadside machine according to claim 1, wherein the specific situation includes a situation in which vibration of a certain magnitude is detected for a certain period of time. The roadside machine according to claim 1, wherein the specific situation includes a situation in which traffic congestion occurs on the road. The roadside machine according to claim 1, wherein the specific situation includes a situation in which a traffic accident occurs on or around the road. The at least one processor
Obtain signal information about traffic signals installed around the road,
When it is determined that the vehicle is stopped and the vehicle is in a state where it can proceed based on the captured image and the signal information, a signal for changing the shooting conditions is transmitted from the communication unit. The roadside machine according to claim 1. The roadside machine according to claim 2 or 6, wherein the at least one processor unicasts or multicasts a signal for changing the shooting conditions from the communication unit to the vehicle. The roadside machine according to any one of claims 3 to 5, wherein the at least one processor broadcasts a signal for changing the shooting conditions from the communication unit. The second camera is a camera used for the electronic mirror function.
According to any one of claims 1 to 8, the at least one processor transmits a signal for widening the angle of view of the second camera as a signal for changing the shooting conditions from the communication unit. The roadside machine described. The second camera is a camera used for the drive recorder function.
The invention according to any one of claims 1 to 8, wherein the at least one processor transmits a signal for increasing the resolution of the second camera as a signal for changing the shooting conditions from the communication unit. Roadside machine. A roadside machine used for traffic communication systems
A communication unit that performs wireless communication with vehicles passing through the road,
A roadside machine including at least one processor that transmits a signal for changing a shooting condition of a camera included in the vehicle from the communication unit. An on-board unit used for transportation communication systems
A notification unit that notifies the occupants of the vehicle and
A communication unit that receives a signal from the roadside unit for changing the shooting conditions of the camera provided in the vehicle, and
An in-vehicle device including at least one processor that notifies from the notification unit that the shooting conditions of the camera are changed when the shooting conditions are different from the shooting conditions currently set for the camera. A traffic communication system comprising the roadside machine and a vehicle according to any one of claims 1 to 11.

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