JP2021114089A - Tag application system, cache server and control method of cache server - Google Patents

Abstract

To provide a tag application system for efficiently acquiring information necessary for tag application to objective data from an information server.SOLUTION: A cache server communicative with a tag application device is controlled so that the cache server includes first position information for specifying a first point which is indicated at objective data which are acquired by a vehicle, an attribute information requirement for requiring the transmission of first attribute information indicating an attribute of the first point is received from the tag application device, a second position indicated at data which are acquired by a sensor on and after the objective data on the basis of the first position information, when the first attribute information is not stored in a storage, second position information for specifying the first position information and the second point is transmitted to an information server, second attribute information indicating attributes of the first attribute information and the second point is received from the information server, the first attribute information and the second attribute information are associated with the first position information and the second position information, respectively, and stored in the storage, and the first attribute information is transmitted to the tag application device.SELECTED DRAWING: Figure 1

Description

The present invention relates to a tagging system, a cache server, and a method of controlling a cache server.

A vehicle control device equipped with artificial intelligence can control the running of a vehicle without the driver's operation based on data collected by sensors mounted on the vehicle (for example, an image of the surroundings of the vehicle acquired by a camera). can. In order to improve the accuracy of control by artificial intelligence, it is required to train artificial intelligence using a large amount of teacher data to which attributes to be identified by artificial intelligence are attached as tags. Teacher data is created by tagging the data collected by the sensor with appropriate attributes.

Patent Document 1 describes a data storage system having an in-vehicle terminal device and an information center, and including a cache for storing data received by the in-vehicle terminal device from an information server. According to the data storage system described in Patent Document 1, the in-vehicle terminal device selects and stores either a temporary cache means for temporarily storing information or a permanent cache means for storing information for a predetermined period of time.

Japanese Unexamined Patent Publication No. 2004-199105

According to the data storage system described in Patent Document 1, the in-vehicle terminal device can efficiently store and reuse the information received from the information server. However, in the data storage system described in Patent Document 1, it is not considered to efficiently acquire information from the information server.

An object of the present invention is to provide a tagging system that efficiently acquires information necessary for tagging target data from an information server.

The tagging system according to the present invention includes a tagging device for tagging target data representing the situation around the vehicle acquired by a sensor installed in the vehicle, and a cache server having storage. In the system, the tagging device requests the cache server to transmit the first attribute information that includes the first position information that identifies the first point represented in the target data and that indicates the attribute of the first point. The cache server predicts the second point represented by the data acquired after the target data by the sensor based on the first position information, and the first attribute information is stored in the storage. If so, the first attribute information is transmitted to the tagging device, and if the first attribute information is not stored in the storage, the first position information and the second position information that identifies the second point are applied to each point. It sends the attribute information indicating the attribute of the point to the information server that stores it in association with it, receives the first attribute information and the second attribute information indicating the attribute of the position specified by the second position information from the information server, and receives the first attribute information. The first attribute information and the second information are stored in the storage in association with the first position information and the second position information, respectively, and the first attribute information is transmitted to the tagging device, and the tagging device receives the first first. Attribute information is added to the target data as a tag.

The cache server according to the present invention is a tagging device that attaches a tag to target data representing the situation around the vehicle acquired by a sensor installed in the vehicle, and attribute information indicating the attribute of the point for each point. The first position information that identifies the first point represented by the target data from the tagging device and the communication unit that can communicate with the information server that stores the data in association with each other, and indicates the attributes of the first point. An attribute information request receiving unit that receives an attribute information request that requests transmission of attribute information, and a second point that predicts a second point represented by data acquired by the sensor after the target data based on the first position information. When the prediction unit and the first attribute information are not stored in the storage, the first position information and the second position information for identifying the second point are transmitted to the information server via the communication unit, and the first attribute information is transmitted. And the second attribute information indicating the attribute of the position specified by the second position information is received from the information server via the communication unit, and the first attribute information and the second attribute information are combined with the first position information, respectively. It includes an attribute information acquisition unit that is associated with the second position information and stored in the storage, and an attribute information transmission unit that transmits the first attribute information to the tagging device via the communication unit.

Further, in the cache server according to the present invention, the attribute information acquisition unit stores the attribute information in the storage in association with the mesh including the point indicated by the position information among the meshes in which the predetermined area is divided into the predetermined size, and stores the attribute information in the storage, and the first position. When the attribute information is stored in the storage in association with the mesh corresponding to the information, it is preferable to determine that the attribute information associated with the first position information is stored in the storage.

Further, in the cache server according to the present invention, the attribute information request receiving unit receives a plurality of attribute information requests including a vehicle identifier that identifies the vehicle and time information indicating the time when the target data is acquired, and predicts the second point. It is preferable that the unit predicts the second point based on the plurality of first position information and the time information included in the plurality of attribute information requests for the plurality of target data acquired by the sensors installed in the vehicle.

Further, in the cache server according to the present invention, it is preferable that the attribute information request further includes the route information indicating the planned travel route of the vehicle, and the second point prediction unit predicts the second point based on the route information. ..

The method for controlling a cache server according to the present invention is a cache server that has storage and can communicate with a tagging device that tags target data representing the situation around the vehicle, which is acquired by a sensor installed in the vehicle. In the control method of, the cache server includes the first position information for specifying the position of the first point represented in the target data from the tagging device, and the first attribute information indicating the attribute of the first point. Receives the attribute information request requesting transmission, predicts the second point represented by the data acquired after the target data by the sensor based on the first position information, and the first attribute information is stored in the storage. If not, the first position information and the second position information that identifies the second point are transmitted to an information server that stores the attribute information indicating the attribute of the point for each point in association with each other, and the first attribute information and the second position information are transmitted. 2 The second attribute information indicating the attribute of the position specified by the position information is received from the information server, and the first attribute information and the second attribute information are associated with the first position information and the second position information, respectively. It includes storing in storage and transmitting the first attribute information to the tagging device.

According to the tagging system according to the present invention, the information necessary for tagging the target data can be efficiently acquired from the information server.

It is operation diagram of the tag addition system. It is a schematic diagram which shows the schematic structure of the tag addition system. It is a hardware schematic diagram of a tag addition device. It is a functional block diagram of the processor which a tagging device has. It is a hardware schematic diagram of a cache server. It is a functional block diagram of the processor which a cache server has. It is a figure explaining the prediction of the 2nd point and the memory of attribute information. It is a processing flowchart of a cache server.

Hereinafter, the tagging system, the cache server, and the control method of the cache server will be described in detail with reference to the drawings. However, it should be understood that the present invention is not limited to the drawings or embodiments described below.

The tagging system according to the present invention includes a tagging device acquired by a sensor installed in a vehicle and tagging target data representing a situation around the vehicle, and a cache server having storage. The tagging device transmits an attribute information request including the first position information and requesting the transmission of the first attribute information to the cache server. The first position information is position information that specifies the position of the first point represented by the target data. The first attribute information is information indicating the characteristics of the first point. Based on the first position information, the cache server predicts the second point represented by the data acquired by the sensor after the target data. When the first attribute information associated with the first location information is not stored in the storage, the cache server has the first attribute information associated with the first location information and the second location information that identifies the second location. And the second attribute information are acquired from the information server and stored in the storage. The cache server transmits the first attribute information to the tagging device. The tag adding device attaches the received first attribute information to the target data as a tag.

FIG. 1 is a schematic operation diagram of the tagging system.

The tagging system 1 includes a tagging device 2 and a cache server 3. The tagging device is mounted on the vehicle 100 and is connected to a camera 110 and a GNSS (Global Navigation Satellite System) sensor 120 installed on the vehicle 100. The cache server 3 has a storage 33. The tagging device 2 can communicate with the cache server 3, and the cache server 3 can communicate with the information server 4.

The tagging device 2 accepts the input of the image data acquired by the camera 110 (1). The camera 110 is installed so as to image the outside (for example, the front) of the vehicle 100, and can acquire image data representing the situation around the vehicle 100. The tagging device 2 associates the position information "N 35.671 E 139.746" (first position information) with the image data. The first position information is information for specifying the position of the first point represented in the image data, and is represented by latitude and longitude in the example of FIG.

The tagging device 2 acquires the position information of the vehicle 100 when the camera 110 acquires the image data from the GNSS sensor 120. Further, the tagging device 2 estimates the directional information indicated by the traveling direction of the vehicle 100 when the camera 110 acquires the image data based on the position information acquired by the GNSS sensor 120. Further, the tagging device 2 stores information such as the shooting direction of the camera 110 and the angle of view of the camera 110 with respect to the vehicle body of the vehicle 100 in advance.

The tagging device 2 obtains the position of the first point represented in the image data based on the position information and orientation information of the vehicle 100, the shooting direction of the camera 110 with respect to the vehicle body of the vehicle 100, and the angle of view of the camera 110. , Associate with image data.

The tagging device 2 transmits an attribute information request requesting transmission of the first attribute information corresponding to the first position information associated with the image data to the cache server 3 (2). The attribute information request includes the first position information.

The first attribute information is information indicating the characteristics of the first point. In the present embodiment, the information for identifying the feature associated with the point represented by the image data corresponds to the attribute information. Further, the attribute information may be information for identifying the land use state at the point represented by the image data.

The cache server 3 predicts the second point represented by the image data acquired after the target image data by the camera 110 based on the first position information included in the attribute information request received from the tagging device 2. .. The prediction of the second point will be described later. In the example of FIG. 1, the point specified by "N 35.672 E 139.751" is predicted as the second point (second position information).

The cache server 3 determines whether or not the first attribute information associated with the first position information is stored in the storage 33. If it is not stored, the first position information and the second position information are transmitted to the information server 4 (3).

The information server 4 stores the location information and the attribute information in association with each other. The information server 4 provides the attribute information "T agency" (first attribute information) and "KS ministry" (second attribute information) associated with the first position information and the second position information transmitted from the cache server 3, respectively. It is transmitted to the cache server 3 (4).

The cache server 3 stores the first attribute information and the second attribute information received from the information server 4 in the storage 33 in association with the first position information and the second position information, respectively.

The cache server 3 transmits the first attribute information stored in the storage 33 in association with the first position information included in the attribute information request received from the tagging device 2 to the tagging device (5).

The tag adding device 2 attaches the received first attribute information to the image data as a tag (6).

By operating in this way, the tagging system 1 according to the present invention can acquire the data necessary for tagging the target data from the information server with a small number of accesses, so that the data required for tagging can be obtained. It can be efficiently obtained from the information server 4.

FIG. 2 is a schematic diagram showing a schematic configuration of a tagging system.

The tagging system 1 includes a tagging device 2 and a cache server 3. The tagging device 2 is mounted on the vehicle 100 and is connected to the camera 110 and the GNSS sensor 120 installed on the vehicle 100. The tagging device 2 may be connected to various sensors (not shown) other than the GNSS sensor installed in the vehicle 100. The tagging device 2 and the cache server 3 can communicate with each other via the network 5. The cache server 3 has a storage 33. The cache server 3 can also communicate with an external device of the tagging system 1 including the information server 4 via the network 5.

The information server 4 is a server that stores attribute information indicating the attributes of the points in association with each other. The information server 4 transmits the attribute information associated with the position information received from the information processing device to the information processing device. In the present embodiment, the information server 4 is an information processing device connected to a database that stores location information and attribute information in association with each other. Further, the information server 4 may be a cloud service provided by a plurality of information processing devices connected to each other.

The network 5 connects the tagging device 2 and the cache server 3 in a communicable manner. The network 5 is, for example, the Internet on which communication by TCP / IP (Transport Control Protocol / Internet Protocol) is performed, and is composed of an optical communication line or the like. The network 5 may include a radio base station (not shown) that provides a wireless connection to a mobile body including the vehicle 100.

FIG. 3 is a schematic hardware diagram of the tagging device.

The tagging device 2 transmits an attribute information request requesting transmission of the first attribute information corresponding to the first position information associated with the image data acquired by the camera 110 installed in the vehicle 100 to the cache server 3. .. Further, the tag adding device 2 attaches the first attribute information received from the cache server 3 to the image data as a tag. Therefore, the tagging device 2 includes an input / output interface 21, a memory 22, and a processor 23.

The input / output interface 21 is an interface circuit for inputting / outputting data between the tagging device 2 and the outside. The input / output interface 21 supplies the received data to the processor 23. Further, the input / output interface 21 outputs the data supplied from the processor 23 to the outside. The input / output interface 21 is, for example, a circuit for performing communication by CAN (Controller Area Network). Further, the input / output interface 21 may be a circuit for connecting peripheral devices such as USB (Universal Serial Bus).

The memory 22 is, for example, at least one of a semiconductor memory, a magnetic disk device, and an optical disk device. The memory 22 stores application programs, data, and the like used for processing by the processor 23. For example, the memory 22 stores an application program for transmitting an attribute information request to the cache server 3, an application program for adding the received first attribute information as a tag to the target data, and the like. The various programs may be installed in the memory 22 from a computer-readable portable recording medium using a known setup program or the like. The computer-readable portable recording medium is, for example, a memory card, a portable hard disk drive, or the like.

The processor 23 is one or more processors and peripheral circuits thereof. The processor 23 comprehensively controls the overall operation of the tagging device 2, and is, for example, a CPU (Central Processing Unit). The processor 23 controls the operation of the input / output interface 21 and the like so that various processes of the tagging device 2 are executed by appropriate means based on the program and the like stored in the memory 22. The processor 23 executes processing based on an application program or the like stored in the memory 22. Further, the processor 23 can execute a plurality of application programs and the like in parallel.

FIG. 3 is a functional block diagram of a processor included in the tagging device.

The processor 23 of the tagging device 2 has an attribute information requesting unit 231 and a tagging unit 232 as functional blocks. Each of these parts of the processor 23 is a functional module implemented by a program executed on the processor 23. Alternatively, each of these parts of the processor 23 may be implemented in the tagging device 2 as an independent integrated circuit, microprocessor, or firmware.

The attribute information request unit 231 transmits the attribute information request to the cache server 3 via the input / output interface 21. The attribute information request is a signal requesting transmission of the first attribute information corresponding to the first position information associated with the image data acquired by the camera 110 installed in the vehicle 100. The attribute information request unit 231 transmits an attribute information request for the image data to which the first position information is associated. The attribute information request unit 231 may transmit an attribute information request each time the first position information is associated with a predetermined number of image data.

The tag adding unit 232 adds the first attribute information received from the cache server 3 via the input / output interface 21 to the image data as a tag. The tagging unit 232 attaches a tag to the image data by writing the first attribute information in the area for storing the metadata in the image data recorded in the EXIF (Exchangeable Image File format) format. The tagged image data is output to an external device via the input / output interface 21. Further, the tagging unit 232 may tag the image data by writing the first attribute information in association with the identifier of the image data in the database stored in the memory 22.

FIG. 5 is a schematic hardware diagram of the cache server.

The cache server 3 predicts the second point based on the first position information included in the attribute information request received from the tagging device 2. Further, the cache server 3 acquires the first attribute information indicating the characteristics of the position specified by the first position information and the second attribute information associated with the second position information specifying the second point from the information server 4. ,Remember. Further, the cache server 3 transmits the first attribute information to the tagging device 2. Therefore, the cache server 3 includes an input / output interface 31, a memory 32, a storage 33, and a processor 34.

The input / output interface 31 is an example of a communication unit, and is an interface circuit for inputting / outputting data between the cache server 3 and the outside. The cache server 3 can communicate with the tagging device 2 and the information server 4 via the input / output interface. The input / output interface 31 supplies the received data to the processor 34. Further, the input / output interface 31 outputs the data supplied from the processor 34 to the outside. The input / output interface 31 is, for example, a circuit for performing TCP / IP communication. Further, the input / output interface 31 may be a circuit for connecting peripheral devices such as USB.

The memory 32 is, for example, a semiconductor memory or a magnetic disk device. The memory 32 stores a driver program, an operating system program, an application program, data, and the like used for processing by the processor 34. For example, the memory 32 stores, as an application program, an application program for predicting a second point, an application program for transmitting the first position information and the second position information to the information server 4, and the like. The various programs may be installed in the memory 32 from a computer-readable portable recording medium using a known setup program or the like. The computer-readable portable recording medium is, for example, a memory card, a hard disk drive, or the like.

The storage 33 is, for example, at least one of a semiconductor memory, a magnetic disk device, and an optical disk device. The storage 33 stores data used for processing by the processor 34. For example, the storage 33 stores the first attribute information and the second attribute information received from the information server 4 in association with the first position information and the second position information, respectively.

The processor 34 is one or more processors and their peripheral circuits. The processor 34 controls the overall operation of the cache server 3 in an integrated manner, and is, for example, a CPU. The processor 34 controls the operation of the input / output interface 31 and the like so that various processes of the cache server 3 are executed by appropriate means based on the program and the like stored in the memory 32. The processor 34 executes processing based on a program (operating system program, driver program, application program, etc.) stored in the memory 32. Further, the processor 34 can execute a plurality of programs (application programs and the like) in parallel.

FIG. 6 is a functional block diagram of a processor included in the cache server.

The processor 34 of the cache server 3 has an attribute information request receiving unit 341, a second point prediction unit 342, an attribute information acquisition unit 343, and an attribute information transmitting unit 344 as functional blocks. Each of these parts of the processor 34 is a functional module implemented by a program running on the processor 34. Alternatively, each of these parts of the processor 34 may be implemented in the cache server 3 as an independent integrated circuit, microprocessor, or firmware.

The attribute information request receiving unit 341 receives the attribute information request from the tagging device 2 via the input / output interface 31. The attribute information request receiving unit 341 stores the received attribute information request in the memory 32.

The second point prediction unit 342 predicts the second point based on the first position information included in the received attribute information request.

FIG. 7 is a diagram for explaining the prediction of the second point and the storage of the attribute information.

The vehicle 100 is traveling from the point S to the point G on the map M shown in FIG. The vehicle 100 acquires images by the camera 110 at a plurality of points on the route from the point S to the point G.

The cache server 3 manages the area shown on the map M by dividing it into meshes of a predetermined size. Specifically, the storage 33 of the cache server 3 stores attribute information associated with points included in the mesh for each mesh.

Here, the operation when the tag adding device 2 attaches a tag using the image data associated with the position information P1 as the target data will be described. The tagging device 2 transmits an attribute information request including the first position information P1 to the cache server 3. The second point prediction unit 342 of the cache server 3 predicts the second point represented by the image data acquired by the camera 110 after the target data based on the position information P1. In the description of FIG. 8, the “point specified by the position information P1” is simply referred to as “P1”.

For example, the second point prediction unit 342 predicts the points included in the meshes D4-F4, D5, F5, and D6-F6 around the mesh E5 corresponding to the first position information P1 as the second point.

Further, the cache server 3 may receive an attribute information request including route information indicating a planned travel route of the vehicle 100 in addition to the position information P1. The route information is information indicating a thick line from the point S to the point G on the map M. In this case, the second point prediction unit 342 predicts each point on the route from P1 to the point G as the second point.

Returning to FIG. 6, the attribute information acquisition unit 343 determines whether or not the first attribute information associated with the first position information is stored in the storage 33. When the first attribute information associated with the first position information is not stored in the storage 33, the attribute information acquisition unit 343 inputs and outputs the first position information and the second position information for specifying the second point. It is transmitted to the information server 4 via 31. Subsequently, the attribute information acquisition unit 343 receives the first attribute information associated with the first position information and the second attribute information associated with the second position information from the information server 4 via the input / output interface 31. do. Further, the attribute information acquisition unit 343 stores the first attribute information and the second attribute information in the storage 33 in association with the first position information and the second position information, respectively.

In the example of FIG. 7, the attribute information acquisition unit 343 determines whether or not the attribute information is stored in the storage 33 in association with the mesh E5 corresponding to the first position information. When the attribute information is stored in the storage 33 in association with the mesh E5, the attribute information acquisition unit 343 determines that the attribute information associated with the first position information P1 is stored in the storage 33.

When it is determined that the attribute information associated with the first position information P1 is not stored in the storage 33, the attribute information acquisition unit 343 determines the attribute information associated with the meshes D4-F4, D5-F5, and D6-F6. Is received from the information server 4. Then, the attribute information acquisition unit 343 stores the received attribute information in the storage 33 in association with the corresponding mesh.

Further, it is assumed that the attribute information request receiving unit 341 has acquired the attribute information request including the time information in addition to the position information for the position information P0 and the position information P1. That is, the cache server 3 has acquired the time information T0 corresponding to the position information P0 and the time information T1 corresponding to the position information P1. In this case, the second point prediction unit 342 transfers the position information P2 of the point obtained by extending the line segment from P0 to P1 in the direction of P1 by the distance between P0 and P1 from the time information T1 (T1-T0). It is predicted as the second point at the lapsed future time T2.

The attribute information acquisition unit 343 receives the attribute information associated with the mesh E5 including P1 and the attribute information associated with the mesh F5 including P2 from the information server 4, and stores them in the storage 33 in association with the corresponding meshes. do.

Further, when the second point prediction unit 342 predicts the second point based on the route information shown in FIG. 7, the attribute information acquisition unit 343 has the attribute information associated with the mesh E5 including P1 and the mesh including the route. The attribute information associated with F5, G5, and G4 is received from the information server 4. Then, the attribute information acquisition unit stores the received attribute information in the storage 33 in association with the corresponding mesh.

Returning to FIG. 6, the attribute information transmission unit 344 transmits the first attribute information stored in the storage 33 in association with the first position information to the tagging device 2 via the input / output interface 31.

FIG. 7 is a processing flowchart of the cache server.

First, the attribute information request receiving unit 341 receives an attribute information request requesting transmission of attribute information corresponding to the image data acquired by the camera 110 installed in the vehicle 100 from the tagging device 2 (step S1). The attribute information request includes the first position information associated with the target data.

Next, the second point prediction unit 342 predicts the second point based on the first position information included in the received attribute information request (step S2).

Next, the attribute information acquisition unit 343 determines whether or not the first attribute information corresponding to the first position information is stored in the storage 33 (step S3).

When it is determined that the first attribute information corresponding to the first position information is not stored in the storage 33 (step S3: N), the attribute information acquisition unit 343 sets the second position information for specifying the second point. It is transmitted to the information server 4. Subsequently, the attribute information acquisition unit 343 receives the first attribute information associated with the first position information and the second attribute information associated with the second position information from the information server 4. Further, the attribute information acquisition unit 343 stores the received first attribute information and the second attribute information in the storage 33 in association with the first position information and the second position information, respectively (step S4).

When it is determined that the attribute information corresponding to the first position information is stored in the storage 33 (step S3: Y), or following step S4, the attribute information transmission unit 344 is stored in the storage 33. The first attribute information is transmitted to the tagging device 2 (step S5).

By processing as described above, the tagging system according to the present embodiment can efficiently acquire the information necessary for tagging the target data from the information server.

A tagging system that is a modification of this embodiment can also be implemented.

For example, the tagging device 2 may not be mounted on the vehicle 100. In this case, the input of the target data to the tagging device 2 is performed via the network 5. Further, the input of the target data to the tagging device 2 may be performed via the storage medium.

Further, the target data may be data obtained by LIDAR (Light Detection and Ranging) or RADAR (Radio Detection and Ranging) installed in the vehicle.

Further, the attribute information may be information specified by the position information and other information. For example, the attribute information may be meteorological data indicating the weather at a certain point at a certain point in time. That is, the meteorological data is specified by the position information and the time information. In this case, the attribute information request includes time information in addition to location information. Then, when the attribute information associated with the current position information and the current time information is not stored in the storage 33, the attribute information acquisition unit 343 receives and stores the current position information and the attribute information associated with the current time information. do.

It will be appreciated by those skilled in the art that various changes, substitutions and modifications can be made to this without departing from the spirit and scope of the invention.

1 Tag assignment system 2 Tag assignment device 231 Attribute information request unit 232 Tag assignment unit 3 Cache server 31 Input / output interface 33 Storage 341 Attribute information request reception unit 342 Second point prediction unit 343 Attribute information acquisition unit 344 Attribute information transmission unit

Claims (6)

A tagging system including a tagging device for tagging target data representing the situation around the vehicle acquired by a sensor installed in the vehicle and a cache server having storage.
The tagging device requests the cache server to transmit first attribute information that includes first position information that identifies the first point represented in the target data and that indicates the attributes of the first point. Send an attribute information request and
The cache server
Based on the first position information, the second point represented by the data acquired by the sensor after the target data is predicted, and the second point is predicted.
When the first attribute information is stored in the storage, the first attribute information is transmitted to the tagging device, and the first attribute information is transmitted to the tagging device.
When the first attribute information is not stored in the storage, the first position information and the second position information for specifying the second point are stored in association with the attribute information indicating the attribute of the point for each point. The first attribute information and the second attribute information indicating the attribute of the position specified by the second position information are received from the information server, and the first attribute information and the second attribute information are received. The attribute information is stored in the storage in association with the first position information and the second position information, respectively, and the first attribute information is transmitted to the tagging device.
The tagging device attaches the received first attribute information to the target data as a tag.
Tagging system. A tagging device that attaches a tag to target data representing the situation around the vehicle acquired by a sensor installed in the vehicle, and an information server that stores attribute information indicating the attribute of the point at each point in association with each other. With a communication unit that can communicate with
From the tagging device, an attribute information request that includes the first position information that identifies the first point represented by the target data and requests the transmission of the first attribute information that indicates the attribute of the first point. The attribute information request receiving unit received via the communication unit and
Based on the first position information, a second point prediction unit that predicts a second point represented by data acquired by the sensor after the target data, and a second point prediction unit.
When the first attribute information is not stored in the storage, the first position information and the second position information that identifies the second point are transmitted to the information server via the communication unit, and the first position information is transmitted. The attribute information and the second attribute information indicating the attribute of the position specified by the second position information are received from the information server via the communication unit, and the first attribute information and the second attribute information are combined. , An attribute information acquisition unit that is stored in the storage in association with the first position information and the second position information, respectively.
An attribute information transmitting unit that transmits the first attribute information to the tagging device via the communication unit, and
A cache server with. The attribute information acquisition unit stores the attribute information in the storage in association with the mesh including the point represented by the position information among the meshes in which the predetermined area is divided into the predetermined sizes, and the mesh corresponding to the first position information. The cache server according to claim 2, wherein when the attribute information associated with the storage is stored in the storage, it is determined that the attribute information associated with the first position information is stored in the storage. The attribute information request receiving unit receives a plurality of the attribute information requests including a vehicle identifier that identifies the vehicle and time information indicating the time when the target data is acquired.
The second point prediction unit is based on the plurality of first position information and the time information included in the plurality of attribute information requests for the plurality of target data acquired by the sensors installed in the vehicle. The cache server according to claim 2 or 3, which predicts a second point. The attribute information request further includes route information indicating a planned travel route of the vehicle.
The cache server according to claim 2 or 3, wherein the second point prediction unit predicts the second point based on the route information. A control method for a cache server that has storage and can communicate with a tagging device that tags target data representing the situation around the vehicle, which is acquired by a sensor installed in the vehicle.
The cache server
Receives an attribute information request from the tagging device that includes first position information that identifies the first point represented by the target data and that requests transmission of first attribute information that indicates the attributes of the first point. death,
Based on the first position information, the second point represented by the data acquired by the sensor after the target data is predicted, and the second point is predicted.
When the first attribute information is not stored in the storage, the first position information and the second position information for specifying the second point are stored in association with the attribute information indicating the attribute of the point for each point. The first attribute information and the second attribute information indicating the attribute of the position specified by the second position information are received from the information server, and the first attribute information and the second attribute information are received. The attribute information is stored in the storage in association with the first position information and the second position information, respectively.
The first attribute information is transmitted to the tagging device.
How to control the cache server, including that.

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