Information notification device, method, and program

Abstract

The present invention makes it possible to notify information to a mobile object appropriately. A detection means (11) detects an object (20). A warning area setting means (12) sets a warning area around the detected object (20). A notification means (13) issues a notification indicating existence of the detected object (20) to a mobile object in the set warning area. The warning area setting means (12) sets a warning area of a size according to at least one of detection quality information relating to the accuracy of detecting the detected object (20) and notification communication quality information relating to the quality of communication to be used for issuing a notification to the mobile object (30).

Description

[Technical Field]

[0001] The present disclosure relates to an information notification device, a method, and a computer-readable medium. [Background technology]

[0002] In recent years, technological developments have progressed in vehicle-to-vehicle communication, which allows communication between vehicles such as automobiles, and road-to-vehicle communication, which allows communication between vehicles and roadside units (RSUs) installed on roads. As related technology, Patent Document 1 discloses a roadside communication device. The roadside communication device described in Patent Document 1 uses road surveillance cameras to determine whether vehicles other than the vehicle with which vehicle-to-vehicle communication is established are located within the communication area. If vehicles other than the vehicle with which vehicle-to-vehicle communication is established are present within the communication area, the roadside communication device collects data being transmitted and received via vehicle-to-vehicle communication. The roadside communication device transmits the collected data in broadcast mode to all vehicles present within the communication area. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Laid-Open No. 2009-278382 Summary of the Invention [Problem to be solved by the invention]

[0004] In Patent Document 1, a roadside communication device collects data transmitted via vehicle-to-vehicle communication, indicating that "an accident has occurred on the road ahead." The roadside communication device uniformly transmits the collected data indicating that "an accident has occurred on the road ahead" to all vehicles within its communication area. However, in Patent Document 1, since the collected data is uniformly transmitted to all vehicles within its communication area, it is not possible to notify vehicles within an appropriate range of information such as "an accident has occurred on the road ahead."

[0005] In view of the above circumstances, one object of the present disclosure is to provide an information notification device, method, and computer-readable medium that can appropriately notify a mobile object of information. [Means for solving the problem]

[0006] To achieve the above object, the present disclosure provides, as a first aspect, an information notification device. The information notification device includes a detection means for detecting an object, a warning area setting means for setting a warning area around the detected object, and a notification means for notifying a mobile object within the warning area of ​​the presence of the detected object. In the information notification device, the warning area setting means sets the warning area with a size corresponding to at least one of detection quality information related to the accuracy of detection of the detected object and notification communication quality information related to the communication quality of communication used to notify the mobile object.

[0007] In a second aspect, the present disclosure provides an information notification device. The information notification device includes a detection means for detecting an object, a warning area setting means for setting a warning area around the detected object, and a notification means for notifying the detected object of the presence of a moving object within the warning area. In the information notification device, the warning area setting means sets the warning area with a size corresponding to at least one of detection quality information related to the accuracy of detection of the detected object and notification communication quality information related to the communication quality of communication used to notify the object.

[0008] The present disclosure provides, as a third aspect, an information notification method, which includes detecting an object, setting a warning area around the detected object with a size corresponding to at least one of detection quality information relating to the accuracy of detection of the detected object and notification communication quality information relating to the communication quality of communication used when notifying a mobile body of the presence of the object, and notifying a mobile body within the warning area of ​​the presence of the detected object.

[0009] The present disclosure provides, as a fourth aspect, an information notification method, which includes detecting an object, setting a warning area around the detected object with a size corresponding to at least one of detection quality information relating to the accuracy of detection of the detected object and notification communication quality information relating to the communication quality of communication used when notifying a mobile object of the presence of the object, and notifying the detected object of the presence of the mobile object within the warning area.

[0010] In a fifth aspect, the present disclosure provides a computer-readable medium storing a program for causing a computer to execute a process including detecting an object, setting a warning area around the detected object with a size corresponding to at least one of detection quality information related to the accuracy of detection of the detected object and notification communication quality information related to the communication quality of communication used when notifying a mobile body of the presence of the object, and notifying a mobile body within the warning area of ​​the presence of the detected object.

[0011] In a sixth aspect, the present disclosure provides a computer-readable medium storing a program for causing a computer to execute a process including detecting an object, setting a warning area around the detected object with a size corresponding to at least one of detection quality information related to the accuracy of detection of the detected object and notification communication quality information related to the communication quality of communication used when notifying a mobile object of the presence of the object, and notifying the detected object of the presence of the mobile object in the warning area. [Effects of the Invention]

[0012] The information notification device, method, and computer-readable medium according to the present disclosure can appropriately notify information to a mobile object. [Brief explanation of the drawings]

[0013] [Figure 1] 1 is a block diagram showing a schematic configuration example of an information notification device according to the present disclosure. [Figure 2]1 is a block diagram illustrating an information notification system including an information notification device according to an embodiment of the present disclosure. [Figure 3] FIG. 1 is a block diagram showing an example of the configuration of a motorcycle. [Figure 4] FIG. 1 is a block diagram showing an example of the configuration of an information notification device. [Figure 5] 10 is a flowchart showing an operation procedure in the information notification device. [Figure 6] FIG. 10 is a schematic diagram showing an example of setting a warning area. [Figure 7] FIG. 1 is a block diagram showing an example of the configuration of a computer device. DETAILED DESCRIPTION OF THE INVENTION

[0014] Prior to describing the embodiments of the present disclosure, an overview of the present disclosure will be described. FIG. 1 shows a schematic configuration example of an information notification device according to the present disclosure. The information notification device 10 includes a detection unit 11, a warning area setting unit 12, and a notification unit 13. The detection unit 11 detects an object 20. The object 20 is not particularly limited, but may be a vehicle such as a motorcycle. The detection unit 11 may detect the object 20 based on, for example, an image captured using a camera and sensor data output by a sensor that senses vehicles on a road. The detection unit 11 may also detect the object 20 based on, for example, location information transmitted from the object.

[0015] The warning area setting means 12 sets a warning area around the object 20 detected by the detection means 11. The notification means 13 notifies the mobile body 30 within the warning area set by the warning area setting means 12 of the presence of the detected object 20. In the present disclosure, the warning area setting means 12 sets the warning area with a size corresponding to detection quality information related to the detection accuracy of the detected object 20. Alternatively, the warning area setting means 12 sets the warning area with a size corresponding to notification communication quality information related to the communication quality of the communication used for notification to the mobile body 30. The warning area setting means 12 may set the warning area with a size corresponding to both the detection quality information and the communication quality information.

[0016] In the present disclosure, warning area setting means 12 sets a warning area around the detected object 20. Notification means 13 notifies moving bodies 30 within the warning area of ​​the presence of the object 20. In the present disclosure, since moving bodies 30 within the warning area are notified of the presence of the object 20, moving bodies 30 located far from the object 20 are not notified of the presence of the object. Therefore, the present disclosure can suppress notifications unnecessary for moving bodies 30 and can notify moving bodies 30 of information appropriately.

[0017] Furthermore, in the present disclosure, the warning area setting means 12 sets a warning area with a size corresponding to at least one of the detection quality information and the communication quality information. For example, the accuracy of detecting the object 20 may vary depending on the weather. Specifically, the detection accuracy of the object 20 may be lower on rainy days than on sunny days. Furthermore, when the detection means 11 detects the object 20 by collecting location information from the object 20, the detection accuracy of the object 20 may vary depending on the communication environment used to collect the location information. Furthermore, if the communication environment used to notify the mobile object 30 is poor, communication delays may occur, resulting in a delay in notification to the mobile object 30. In the present disclosure, the size of the warning area can be changed depending on at least one of the detection quality information and the communication quality information, and the presence of the object 20 can be notified to mobile objects 30 within an appropriate range depending on the situation.

[0018] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings. Note that the following description and drawings have been omitted and simplified as appropriate for clarity of explanation. In addition, in each drawing, the same or similar elements are designated by the same reference numerals, and duplicate explanations are omitted as necessary.

[0019] FIG. 2 shows an information notification system including an information notification device according to an embodiment of the present disclosure. The information notification system 100 includes an information notification device 110, a camera 210, and a roadside device 220. In this embodiment, the information notification device 110 detects a motorcycle 300 and notifies a moving object 350 around the motorcycle 300 of the presence of the motorcycle 300. Note that while FIG. 2 illustrates one camera 210 and one roadside device 220, the number of cameras 210 and roadside devices 220 is not limited to one. The information notification system 100 may include any number of cameras 210 and roadside devices 220. The information notification device 110 corresponds to the information notification device 10 shown in FIG. 1. The motorcycle 300 corresponds to the object 20 shown in FIG. 1. The moving object 350 corresponds to the moving object 30 shown in FIG. 1.

[0020] The camera 210 and the roadside unit 220 are placed, for example, at an intersection. The camera 210 captures images of vehicles on a road near the intersection, for example. The roadside unit 220 includes a wireless communication device that performs wireless communication with the motorcycle 300 and the moving object 350, each equipped with an on-board communication device. In the information notification system 100, a plurality of cameras 210 and roadside units 220 may be placed at one intersection. Furthermore, one or more cameras 210 and roadside units 220 may be placed at each of a plurality of intersections.

[0021] FIG. 3 shows an example configuration of a motorcycle 300. The motorcycle 300 has an on-board communication device 301 and a display 302. The on-board communication device 301 includes a wireless communication device. The on-board communication device 301 performs, for example, Long Term Evolution (LTE) Vehicle-to-Everything (V2X) direct communication (PC5 communication) with the roadside device 220. The on-board communication device 301 transmits vehicle information including location information of the motorcycle 300 to the roadside device 220. The on-board communication device 301 periodically broadcasts the vehicle information, for example, at intervals of several tens of milliseconds to 100 milliseconds. The roadside device 220 periodically receives the vehicle information transmitted from the on-board communication device 301. The roadside device 220 transmits the received vehicle information of the motorcycle 300 to the information notification device 110.

[0022] The display 302 is a display device for displaying various information to a rider of the motorcycle 300. The display 302 may be, for example, a liquid crystal display device or an OLED (Organic Electro Luminescence Diode) display.

[0023] Like the motorcycle 300, the mobile object 350 includes an on-board communication device and a display. The on-board communication device of the mobile object 350 periodically broadcasts vehicle information including location information of the mobile object 350. The roadside device 220 periodically receives the vehicle information transmitted from the mobile object 350. The roadside device 220 transmits the received vehicle information of the mobile object 350 to the information notification device 110. The mobile object 350 is configured as a vehicle that travels on a road, such as an automobile, bus, taxi, or truck. The mobile object 350 may be configured to be capable of automatic driving (autonomous driving) based on information from sensors mounted on the mobile object. The mobile object 350 may be a motorcycle.

[0024] 2, it is not necessary for all motorcycles 300 and all mobile bodies 350 to be equipped with an on-board communication device. For example, at least some of the motorcycles 300 may be vehicles ridden by users who own portable communication terminals 310, such as smartphones or tablet terminals. Similarly, the mobile bodies 350 may be vehicles ridden by users who own portable communication terminals 360, such as smartphones or tablet terminals. The portable communication terminals 310 and 360 each include a communication unit that wirelessly communicates with the wireless communication network 230 and a display. The wireless communication network 230 includes a wireless communication network using a communication line standard such as a fourth-generation mobile communication system or LTE. The wireless communication network 230 may also include a wireless communication network such as Wi-Fi (registered trademark) or a fifth-generation mobile communication system.

[0025] An application for transmitting vehicle information including location information to the information notification device 110 is installed in each of the portable communication terminals 310 and 360. The portable communication terminal 310 (the application) periodically transmits vehicle information including location information of the motorcycle 300 ridden by the user to the information notification device 110 via the wireless communication network 230. The portable communication terminal 360 periodically transmits vehicle information including location information of the moving object 350 ridden by the user to the information notification device 110 via the wireless communication network 230.

[0026] The motorcycle 300 may be a vehicle equipped with the on-board communication device 301 and ridden by a user who owns the portable communication terminal 310. The motorcycle 300 may also be a vehicle not equipped with the on-board communication device 301 and ridden by a user who does not own the portable communication terminal 310. The mobile object 350 may be a vehicle equipped with the on-board communication device and ridden by a user who owns the portable communication terminals 310 and 360.

[0027] 4 shows an example configuration of the information notification device 110. The information notification device 110 has an information receiving unit 111, a video receiving unit 112, a detection unit 113, a warning area setting unit 114, a notification unit 115, a detection quality information acquisition unit 116, and a communication quality information acquisition unit 117. The information notification device 110 is configured as a device including, for example, one or more processors and one or more memories. At least some of the functions of each unit in the information notification device 110 can be realized by the processor performing processing in accordance with a program read from the memory.

[0028] 2 shows only one information notification device 110, the information notification system 100 may have multiple information notification devices 110. For example, in the information notification system 100, an information notification device 110 may be placed at each intersection where a camera 210 or a roadside device 220 is installed. An information notification device 110 may be placed in each area including multiple intersections. The information notification device 110 may be configured as, for example, a MEC (Mobile / Multi-access Edge Computing) server.

[0029] The information receiving unit 111 receives vehicle information transmitted from the motorcycle 300 and the moving object 350 from the roadside device 220. In other words, the information receiving unit 111 receives the vehicle information of the motorcycle 300 and the moving object 350 from the motorcycle 300 and the moving object 350 via the roadside device 220. The information receiving unit 111 also receives the vehicle information of the motorcycle 300 and the moving object 350 from the portable communication terminals 310 and 360 via the wireless communication network 230. The vehicle information of the motorcycle 300 received by the information receiving unit 111 includes, for example, the position information, speed, acceleration, and traveling direction (heading) of the motorcycle 300. The vehicle information of the moving object 350 received by the information receiving unit 111 includes, for example, the position information, speed, acceleration, and traveling direction of the moving object 350. The video receiving unit 112 receives video captured by the camera 210.

[0030] The detection unit 113 detects the motorcycle 300, which is the detection target. In this embodiment, the detection unit 113 detects the position of the motorcycle 300 based on at least one of the vehicle information of the motorcycle 300 received by the information receiving unit 111 and the video received by the video receiving unit 112. The detection unit 113 can detect the motorcycle 300 using at least one of a plurality of detection methods. The plurality of detection methods includes, for example, a first detection method of detecting the motorcycle 300 using the video from the camera 210. The plurality of detection methods also includes a second detection method of detecting the motorcycle 300 based on position information of the motorcycle 300 received via the wireless communication network 230. The plurality of detection methods also includes a third detection method of detecting the motorcycle 300 based on position information of the motorcycle 300 received via the roadside device 220.

[0031] When detecting motorcycle 300 using the first detection method, detection unit 113 acquires the video captured by camera 210 from video receiving unit 112. Detection unit 113 performs video analysis on the acquired video and detects the position of motorcycle 300 included in the video. Instead of detecting the position of motorcycle 300 from the video of camera 210, detection unit 113 may use a sensor such as LiDAR (light detection and ranging) to detect the position of motorcycle 300 based on sensor data (e.g., three-dimensional point cloud data) obtained from the sensor. When detection unit 113 detects motorcycle 300, it tracks the position of motorcycle 300 as it travels.

[0032] When detecting the motorcycle 300 using the second detection method, the detection unit 113 acquires, from the information receiving unit 111, location information transmitted from the portable communication terminal 310 and received via the wireless communication network 230. The detection unit 113 detects the location indicated by the location information transmitted from the portable communication terminal 310 as the location of the motorcycle 300. When detecting the motorcycle 300 using the third detection method, the detection unit 113 acquires, from the information receiving unit 111, location information of the motorcycle 300 transmitted from the on-vehicle communication device 301 (see FIG. 3 ) and received via the roadside device 220. The detection unit 113 detects the location indicated by the location information transmitted from the on-vehicle communication device 301 as the location of the motorcycle 300. The detection unit 113 may predict the location of the motorcycle 300 after a predetermined time and detect the predicted location as the location of the motorcycle 300. The detection unit 113 corresponds to the detection means 11 shown in FIG.

[0033] The warning area setting unit 114 sets a warning area around the motorcycle 300 detected by the detection unit 113. The warning area setting unit 114 may set a range of several tens of meters to approximately 100 meters from the motorcycle 300, taking into consideration the braking distance of the traveling moving object 350, etc. The warning area setting unit 114 corresponds to the warning area setting means 12 shown in Fig. 1. The setting of the warning area by the warning area setting unit 114 will be described in detail later.

[0034] The notification unit 115 notifies the moving objects 350 within the warning area of ​​the presence of the motorcycle 300. The notification unit 115, for example, compares location information included in the vehicle information received from each of one or more moving objects 350 with the warning area set by the warning area setting unit 114. The notification unit 115 identifies moving objects 350 that exist within the warning area and moving objects 350 that will enter the warning area. The notification unit 115 notifies the identified moving objects 350 of the presence of the motorcycle 300. The notification unit 115 notifies an on-board communication device mounted on the moving object 350 of the presence of the motorcycle 300, for example, via the roadside unit 220. Alternatively, the notification unit 115 may notify the portable communication terminal 360 of the user riding the moving object 350 of the presence of the motorcycle 300 via the wireless communication network 230.

[0035] When the moving body 350 is heading toward an intersection where there is a possibility of collision with the detected motorcycle 300 within the warning area, the notification unit 115 may notify the moving body 350 of the presence of the motorcycle 300. For example, consider a case where the motorcycle 300 and the moving body 350 are traveling in the same direction and the motorcycle 300 is located behind the moving body 350. In this case, when the motorcycle 300 is traveling straight and the moving body 350 is heading toward an intersection where the moving body 350 will turn left (in the case of driving on the right side of the road), the notification unit 115 may notify the moving body 350 of the presence of the motorcycle 300. When the motorcycle 300 and the moving body 350 are traveling in opposite directions and the motorcycle 300 is traveling straight and the moving body 350 is heading toward an intersection where the moving body 350 will turn right (in the case of driving on the right side of the road), the notification unit 115 may notify the moving body 350 of the presence of the motorcycle 300.

[0036] When mobile object 350 includes an on-vehicle communication device and a user riding on mobile object 350 carries portable communication terminal 360, notification unit 115 may notify either on-vehicle communication device or portable communication terminal 360 of the presence of motorcycle 300. For example, notification unit 115 may notify one of on-vehicle communication device or portable communication terminal 360, whichever device the user has set as a priority device in advance, of the presence of motorcycle 300. Alternatively, notification unit 115 may notify both on-vehicle communication device and portable communication terminal 360 of the presence of motorcycle 300. Notification unit 115 corresponds to notification means 13 shown in FIG. 1 .

[0037] Upon receiving the notification, the mobile object 350 displays on its display a message indicating that a motorcycle is nearby. When the notification unit 115 notifies the portable communication terminal 360, the portable communication terminal 360 displays on its display a message indicating that a motorcycle is nearby. The driver of the mobile object 350 can drive the mobile object 350 while paying attention to the motorcycle 300. If the mobile object 350 is an autonomous vehicle, the mobile object 350 may switch the autonomous driving control to a safer control when notified of the presence of the motorcycle 300. For example, when notified of the presence of the motorcycle 300, the mobile object 350 may perform autonomous driving without overtaking or changing lanes.

[0038] The detection quality information acquisition unit 116 acquires detection quality information of the motorcycle 300 detected by the detection unit 113. Here, the detection quality information indicates information related to the accuracy of detection of the detected motorcycle 300. The detection quality information includes, for example, information identifying the detection method used to detect the motorcycle 300. For example, when the position of the motorcycle 300 is detected from the video of the camera 210, the detection quality information acquisition unit 116 includes, in the detection quality information, information indicating that a first detection method was used to detect the motorcycle 300. When the position of the motorcycle 300 is detected based on the position information transmitted from the portable communication terminal 310, the detection quality information acquisition unit 116 includes, in the detection quality information, information indicating that a second detection method was used to detect the motorcycle 300. When the position of the motorcycle 300 is detected based on the position information transmitted from the in-vehicle communication device 301, the detection quality information acquisition unit 116 includes, in the detection quality information, information indicating that the second detection method was used to detect the motorcycle 300.

[0039] The detection quality information may include information about the surrounding environment at the location where the motorcycle 300 was detected. The surrounding environment information includes, for example, information about the weather. The detection quality information includes communication environment information for wireless communication (e.g., PC5 communication) between the roadside device 220 and the motorcycle 300 used to receive the position information. Alternatively or in addition to this, the detection quality information includes communication environment information for the wireless communication network 230 used to receive the position information. The communication environment information may include, for example, at least one of the radio wave strength, transmission interval (cycle), and communication congestion level of base stations included in the roadside device 220 and the wireless communication network 230, which are related to the transmission of the position information. The communication environment information is related to the communication response of the position information.

[0040] The communication quality information acquisition unit 117 acquires notification communication quality information related to the communication quality of communication used for notification to the mobile object 350. The notification communication quality information may include, for example, at least one of radio wave strength, transmission interval (cycle), and communication congestion level of the base stations included in the roadside device 220 and the wireless communication network 230, which are related to the transmission of the notification to the mobile object 350. The notification communication quality information is related to the communication response of the notification transmitted to the mobile object 350.

[0041] Here, it is considered that the detection accuracy of the motorcycle 300 differs between detecting the motorcycle 300 using video from the camera 210 and detecting the motorcycle 300 based on vehicle information (location information) transmitted from the motorcycle 300 or the portable communication terminal 310. It is also considered that the transmission interval of the location information differs between transmitting the location information from the in-vehicle communication device 301 (see FIG. 3 ) and transmitting the location information from the portable communication terminal 310 via the wireless communication network 230. When location information is used, packet retransmission may occur if the communication environment is poor, such as low radio wave strength, resulting in communication delays. It is considered that the accuracy of the detected location of the motorcycle 300 decreases when the reception interval of the location information from the information notification device 110 is long compared to when the reception interval is short.

[0042] In this embodiment, the warning area setting unit 114 sets the warning area with a size corresponding to at least one of the detection quality information and the notification communication quality information. For example, when the detection quality information includes information identifying the detection method used to detect the motorcycle 300, the warning area setting unit 114 may determine the size of the warning area according to the information identifying the detection method. In this case, the warning area setting unit 114 may change the size of the warning area depending on whether the first detection method is used, the second detection method is used, or the third detection method is used. When the detection quality information includes at least one of surrounding environment information and communication environment information, the warning area setting unit 114 may determine the size of the warning area according to at least one of the surrounding environment information and the communication environment information. When the surrounding environment information and the communication environment information indicate poor environmental conditions, the warning area setting unit 114 may set the warning area wider than when the environmental conditions are good.

[0043] Next, the operation procedure will be explained. Fig. 5 shows the operation procedure (information notification method) in the information notification device 110. The detection unit 113 detects the motorcycle 300 that is the detection target (step S1). In step S1, the detection unit 113 detects the position of the motorcycle 300 from the camera video received by the video receiving unit 112. In step S1, the detection unit 113 detects the position of the motorcycle 300 based on the position information of the motorcycle 300 that the information receiving unit 111 receives via the roadside device 220 or the wireless communication network 230.

[0044] The warning area setting unit 114 sets a warning area around the motorcycle 300 detected in step S1 (step S2). In step S2, the warning area setting unit 114 sets the warning area with a size according to at least one of the detection quality information acquired by the detection quality information acquisition unit 116 and the notification communication quality information acquired by the communication quality information acquisition unit 117. If multiple motorcycles 300 are detected in step S1, the warning area setting unit 114 sets a warning area for each of the multiple motorcycles 300. The notification unit 115 notifies the moving object 350 within the warning area set in step S2 of the presence of the motorcycle 300 (step S3).

[0045] FIG. 6 shows an example of setting a warning area. In one aspect, assume that the surrounding environment information included in the detection quality information is first surrounding environment information. In this case, the warning area setting unit 114 sets the first warning area 320A shown in FIG. 6. In another aspect, assume that the surrounding environment information included in the detection quality information is second surrounding environment information. The second surrounding environment information has worse environmental conditions than the first surrounding environment information. The worse environmental conditions of the surrounding environment information may indicate, for example, rain or snow, or low illuminance. If the environmental conditions worsen, the accuracy of detecting the motorcycle 300 may decrease, and the detected position of the motorcycle 300 may fluctuate. In this case, the warning area setting unit 114 sets the warning area to a second warning area 320B that is larger than the first warning area 320A. If the range of the warning area is expanded, the range of moving objects 350 to which notifications are delivered may be expanded accordingly.

[0046] Furthermore, in a certain aspect, it is assumed that the communication environment information included in the detection quality information is first communication environment information. In this case, the warning area setting unit 114 sets the first warning area 320A shown in FIG. 6 . In another aspect, it is assumed that the communication environment information included in the detection quality information is second communication environment information. The second communication environment information has worse environmental conditions than the first communication environment information. A worse environmental condition of the communication environment information indicates, for example, a decrease in radio wave strength, a long interval between transmissions of location information, or congested communication. If the environmental conditions deteriorate, the accuracy of detection of the motorcycle 300 decreases, and the detected position of the motorcycle 300 is likely to fluctuate. In this case, the warning area setting unit 114 sets the warning area to a second warning area 320B that is larger than the first warning area 320A. If the range of the warning area is expanded, the range of moving objects 350 to which notifications are delivered can be expanded accordingly.

[0047] Furthermore, in a certain aspect, it is assumed that the notification communication environment information included in the notification quality information is first notification communication environment information. In this case, the warning area setting unit 114 sets the first warning area 320A shown in FIG. 6 . In another aspect, it is assumed that the notification environment information included in the notification quality information is second notification communication environment information. The second notification communication environment information is assumed to have worse environmental conditions than the first notification communication environment information. The worse environmental conditions of the notification communication environment information indicate, for example, reduced radio wave strength or congested communication. If the environmental conditions deteriorate, it is considered that the notification to the moving object 350 will be delayed. In this case, the warning area setting unit 114 sets the warning area to a second warning area 320B that is larger than the first warning area 320A. If the range of the warning area is expanded, the notification can be delivered to the moving object 350 at a location farther away from the motorcycle 300 by the increased warning area.

[0048] In this embodiment, the warning area setting unit 114 sets a warning area with a size corresponding to at least one of the detection quality information and the notification communication quality information. If the detection accuracy of the motorcycle 300 decreases, there is a possibility that a discrepancy will occur between the detected position and the actual position of the detected motorcycle 300. If the detected position of the motorcycle 300 is inaccurate, if the size of the warning area set accordingly is uniform, there is a possibility that the moving body 350 to which the notification is intended will not be notified of the presence of the motorcycle 300. In this embodiment, the size of the detection area can be set according to the detection quality information, and the moving body 350 can be appropriately notified of the presence of the motorcycle 300. Furthermore, if the communication response for notifying the moving body 350 deteriorates, if the size of the warning area is uniform, there is a possibility that the timing of notification to the moving body 350 will be delayed, resulting in a delay in discovering the motorcycle 300. In this embodiment, the size of the detection area can be set according to the notification quality information, and if the communication response is poor, the range of the warning area can be widened, allowing notification to be sent to the mobile body 350 when there is still some distance to go.

[0049] In the above embodiment, an example has been described in which the detection unit 113 detects the motorcycle 300. However, the present disclosure is not limited to this. The detected object detected by the detection unit 113 is not limited to a motorcycle, and may be a bicycle, a pedestrian, or the like. Alternatively, the detected object may be a vehicle such as a car, bus, or truck traveling on a road, or an emergency vehicle.

[0050] In the above embodiment, an example has been described in which the notification unit 115 notifies the moving body 350 that the motorcycle 300 is nearby. However, the present disclosure is not limited to this. For example, instead of or in addition to notifying the moving body 350, the notification unit 115 may notify the motorcycle 300 or the portable communication terminal 310 that the moving body 350 is nearby. In this case, the display of the motorcycle 300 or the display 302 of the portable communication terminal 310 (see FIG. 3 ) displays a message indicating that the moving body 350 is nearby, thereby alerting the rider of the motorcycle 300. The notification unit 115 may notify the motorcycle 300 of the presence of the moving body 350 when the motorcycle 300 is heading toward an intersection within the warning area where there is a possibility of a collision with the moving body 350.

[0051] In the above embodiment, the information notification device 110 may be configured as a computer device. Fig. 8 shows an example of the configuration of a computer device that may be used as the information notification device 110. The computer device 500 includes a control unit (CPU: Central Processing Unit) 510, a storage unit 520, a ROM (Read Only Memory) 530, a RAM (Random Access Memory) 540, a communication interface (IF: Interface) 550, and a user interface 560.

[0052] The communication interface 550 is an interface for connecting the computer device 500 to a communication network via wired communication means or wireless communication means, etc. The user interface 560 includes a display unit such as a display, and an input unit such as a keyboard, a mouse, and a touch panel.

[0053] The storage unit 520 is an auxiliary storage device that can store various types of data. The storage unit 520 does not necessarily have to be a part of the computer device 500, but may be an external storage device or a cloud storage connected to the computer device 500 via a network.

[0054] The ROM 530 is a non-volatile storage device. For example, a semiconductor storage device with a relatively small capacity, such as a flash memory, is used for the ROM 530. The programs executed by the CPU 510 can be stored in the storage unit 520 or the ROM 530. The storage unit 520 or the ROM 530 stores various programs for realizing the functions of each unit in the information notification device 110, for example.

[0055] The program includes instructions (or software code) that, when loaded into a computer, cause the computer to perform one or more functions described in the embodiments. The program may be stored in a non-transitory computer-readable medium or a tangible storage medium. By way of example and not limitation, computer-readable media or tangible storage media include RAM, ROM, flash memory, solid-state drive (SSD) or other memory technology, Compact Disc (CD)-ROM, digital versatile disc (DVD), Blu-ray® disc or other optical disk storage, magnetic cassette, magnetic tape, magnetic disk storage or other magnetic storage devices. The program may also be transmitted on a transitory computer-readable medium or communication medium. By way of example and not limitation, transitory computer-readable media or communication media include electrical, optical, acoustic, or other forms of propagated signals.

[0056] The RAM 540 is a volatile storage device. Various semiconductor memory devices such as a dynamic random access memory (DRAM) or a static random access memory (SRAM) are used for the RAM 540. The RAM 540 can be used as an internal buffer for temporarily storing data and the like. The CPU 510 loads a program stored in the storage unit 520 or the ROM 530 into the RAM 540 and executes it. The CPU 510 executes the program, thereby realizing the functions of each unit in the information notification device 110. The CPU 510 may have an internal buffer for temporarily storing data and the like.

[0057] The above describes the embodiments of the present disclosure in detail, but the present disclosure is not limited to the above-described embodiments, and changes and modifications to the above-described embodiments that do not deviate from the spirit of the present disclosure are also included in the present disclosure.

[0058] For example, some or all of the above embodiments can be described as, but are not limited to, the following supplementary notes.

[0059] [Appendix 1] a detection means for detecting an object; a warning area setting means for setting a warning area around the detected object; a notification means for notifying a moving body within the warning area of ​​the presence of the detected object, The warning area setting means of the information notification device sets the warning area with a size that corresponds to at least one of detection quality information regarding the accuracy of detection of the detected object and notification communication quality information regarding the communication quality of the communication used to notify the mobile body.

[0060] [Appendix 2] the detection means detects the object using at least one of a plurality of detection techniques; the detection quality information includes information identifying a detection technique used to detect the object; 2. The information notification device according to claim 1, wherein the warning area setting means determines the size of the warning area according to information identifying a detection method included in the detection quality information.

[0061] [Appendix 3] The information notification device described in Appendix 2, wherein the plurality of detection methods include a first detection method of detecting the object using a camera or a sensor, a second detection method of receiving location information transmitted from the object via a wireless communication network and detecting the object based on the received location information, and a third detection method of acquiring location information transmitted from the object via wireless communication between a roadside unit and the object and detecting the object based on the acquired location information.

[0062] [Appendix 4] The information notification device described in Appendix 3, wherein the detection quality information includes at least one of surrounding environment information at the location where the object is detected and communication environment information for at least one of the wireless communication network and the wireless communication.

[0063] [Appendix 5] the detection quality information includes surrounding environment information at a location where the object is detected; The information notification device described in Appendix 4, wherein the warning area setting means sets a warning area wider than the warning area set when the surrounding environment information is second surrounding environment information that is worse than first surrounding environment information.

[0064] [Appendix 6] the detection quality information includes at least one of communication environment information in the wireless communication network and communication environment information in the wireless communication; The information notification device described in Appendix 4 or 5, wherein the warning area setting means sets a warning area wider than the warning area set when the communication environment information is second communication environment information that is worse than first communication environment information.

[0065] [Appendix 7] The information notification device according to any one of appendices 1 to 6, wherein the notification means notifies the mobile body of the presence of the detected object via at least one of a wireless communication network and wireless communication between a roadside device and the mobile body.

[0066] [Appendix 8] the notified communication quality information includes notified communication environment information in the wireless communication network and in wireless communication between the roadside device and the mobile object, The information notification device described in Appendix 7, wherein the warning area setting means sets a warning area wider than the warning area set when the notification communication environment information is second notification communication environment information that is worse than first notification communication environment information.

[0067] [Appendix 9] 9. The information notification device according to any one of Supplementary Notes 1 to 8, wherein the notification means further notifies the detected object of the presence of a moving object within the warning area.

[0068] [Appendix 10] 10. The information notification device according to any one of Supplementary Notes 1 to 9, wherein the object is a two-wheeled vehicle.

[0069] [Appendix 11] a detection means for detecting an object; a warning area setting means for setting a warning area around the detected object; a notification means for notifying the detected object of the presence of a moving object within the warning area, The warning area setting means of the information notification device sets the warning area with a size that corresponds to at least one of detection quality information regarding the accuracy of detection of the detected object and notification communication quality information regarding the communication quality of the communication used to notify the object.

[0070] [Appendix 12] the detection means detects the object using at least one of a plurality of detection techniques; the detection quality information includes information identifying a detection technique used to detect the object; 12. The information notification device according to claim 11, wherein the warning area setting means determines the size of the warning area according to information identifying a detection method included in the detection quality information.

[0071] [Appendix 13] Detect the object, setting a warning area around the detected object with a size corresponding to at least one of detection quality information relating to the accuracy of detection of the detected object and notification communication quality information relating to the communication quality of communication used when notifying a mobile unit of the presence of the object; An information notification method including notifying a mobile body within the warning area of ​​the presence of the detected object.

[0072] [Appendix 14] Detect the object, setting a warning area around the detected object with a size corresponding to at least one of detection quality information relating to the accuracy of detection of the detected object and notification communication quality information relating to the communication quality of communication used when notifying a mobile unit of the presence of the object; an information notification method including notifying the detected object of the presence of a moving object within the warning area;

[0073] [Appendix 15] Detect the object, setting a warning area around the detected object with a size corresponding to at least one of detection quality information relating to the accuracy of detection of the detected object and notification communication quality information relating to the communication quality of communication used when notifying a mobile unit of the presence of the object; A non-transitory computer-readable medium storing a program for causing a computer to execute a process including notifying a mobile body within the warning area of ​​the presence of the detected object.

[0074] [Appendix 16] Detect the object, setting a warning area around the detected object with a size corresponding to at least one of detection quality information relating to the accuracy of detection of the detected object and notification communication quality information relating to the communication quality of communication used when notifying a mobile unit of the presence of the object; A non-transitory computer-readable medium storing a program for causing a computer to execute a process including notifying the detected object of the presence of a moving object within the warning area. [Explanation of symbols]

[0075] 10: Information notification device 11: Detection means 12: Warning area setting means 13: Notification means 20: Object 30: Mobile 100: Information notification system 110: Information notification device 111: Information receiving unit 112: Video receiving unit 113: Detection unit 114: Warning area setting section 115: Notification Department 116: Detection quality information acquisition unit 117: Communication quality information acquisition unit 210: Camera 220: Roadside machine 230: Wireless communication network 300:Motorcycles 301: In-vehicle communication device 302: Display 310: Portable communication terminal 320: Warning Area 350: Mobile 360: Portable communication terminal 500: Computer equipment 510:CPU 520: Storage section 530:ROM 540:RAM 550: Communication interface 560: User Interface

Claims

1. a detection means for detecting an object; a warning area setting means for setting a warning area around the detected object; a notification means for notifying a moving body within the warning area of ​​the presence of the detected object, The warning area setting means of the information notification device sets the warning area with a size that corresponds to at least one of detection quality information regarding the accuracy of detection of the detected object and notification communication quality information regarding the communication quality of the communication used to notify the mobile body.

2. the detection means detects the object using at least one of a plurality of detection techniques; the detection quality information includes information identifying a detection technique used to detect the object; The information notification device according to claim 1 , wherein the warning area setting means determines the size of the warning area in accordance with information identifying a detection method included in the detection quality information.

3. 3. The information notification device according to claim 2, wherein the plurality of detection methods include a first detection method of detecting the object using a camera or a sensor, a second detection method of receiving location information transmitted from the object via a wireless communication network and detecting the object based on the received location information, and a third detection method of acquiring location information transmitted from the object via wireless communication between a roadside unit and the object and detecting the object based on the acquired location information.

4. the notification means notifies the mobile body of the presence of the detected object via at least one of a wireless communication network and wireless communication between the roadside device and the mobile body; the notified communication quality information includes notified communication environment information in the wireless communication network and in wireless communication between the roadside device and the mobile object, The information notification device according to any one of claims 1 to 3, wherein the warning area setting means sets a warning area wider than the warning area set when the notification communication environment information is the first notification communication environment information when the notification communication environment information is second notification communication environment information that is worse than first notification communication environment information.

5. The information notification device according to claim 1 , wherein the notification means further notifies the detected object of the presence of a moving object within the warning area.

6. a detection means for detecting an object; a warning area setting means for setting a warning area around the detected object; a notification means for notifying the detected object of the presence of a moving object within the warning area, The warning area setting means of the information notification device sets the warning area with a size that corresponds to at least one of detection quality information regarding the accuracy of detection of the detected object and notification communication quality information regarding the communication quality of the communication used to notify the object.

7. A computer comprising: Detect the object, setting a warning area around the detected object with a size corresponding to at least one of detection quality information relating to the accuracy of detection of the detected object and notification communication quality information relating to the communication quality of communication used when notifying a mobile unit of the presence of the object; An information notification method including notifying a mobile body within the warning area of ​​the presence of the detected object.

8. A computer comprising: Detect the object, setting a warning area around the detected object with a size corresponding to at least one of detection quality information relating to the accuracy of detection of the detected object and notification communication quality information relating to the communication quality of communication used when notifying a mobile unit of the presence of the object; an information notification method including notifying the detected object of the presence of a moving object within the warning area;

9. Detect the object, setting a warning area around the detected object with a size corresponding to at least one of detection quality information relating to the accuracy of detection of the detected object and notification communication quality information relating to the communication quality of communication used when notifying a mobile unit of the presence of the object; A program for causing a computer to execute a process including notifying a moving body within the warning area of ​​the presence of the detected object.

10. Detect the object, setting a warning area around the detected object with a size corresponding to at least one of detection quality information relating to the accuracy of detection of the detected object and notification communication quality information relating to the communication quality of communication used when notifying a mobile unit of the presence of the object; A program for causing a computer to execute a process including notifying the detected object of the presence of a moving object within the warning area.

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