JP2019160059A - Information provision device, information provision method, and computer program - Google Patents

Abstract

To provide an information provision device capable of optimizing a load of update processing without impairing a real time characteristic of information being provided to a vehicle.SOLUTION: An information provision device includes an input unit that receives an input of a sensor value from a sensor, and a production unit that uses the input sensor value to produce first dynamic information in a first cycle. When a specific vehicle exists, the production unit uses a sensor value, which is received from a sensor existing in a peripheral area of the specific vehicle, to produce second dynamic information in a second cycle shorter than the first cycle.SELECTED DRAWING: Figure 8

Description

  The present invention relates to an information providing apparatus, an information providing method, and a computer program.

  Conventionally, for example, in Japanese Unexamined Patent Application Publication No. 2002-314707 (Patent Document 1) and Japanese Unexamined Patent Application Publication No. 2009-206750 (Patent Document 2), a plurality of sensors are installed, and sensor information output from them is displayed on a display device. Various technologies have been proposed.

JP 2002-314707 A JP 2009-206750 A

  In any patent document, sensor information is collected at a predetermined update interval to update the display on the display device. Although the real-time property of the displayed information is inferior as the update interval is widened, the load of the update process is reduced. On the other hand, the shorter the update interval, the better the real-time property of the displayed information, but the load of the update process increases.

  An object of one aspect of the present invention is to provide an information providing apparatus, an information providing method, and a computer program capable of optimizing the load of update processing without impairing the real-time property of information provided to a vehicle.

  According to an embodiment, the information providing device includes an input unit that receives an input of a sensor value from a sensor, a generation unit that generates first dynamic information in a first period using the input sensor value, When the specific vehicle exists, the generation unit uses the sensor value from the sensor existing in the peripheral area of the specific vehicle, and uses the second dynamic information in a second cycle shorter than the first cycle. Is generated.

  According to another embodiment, the information providing method is a method of providing dynamic information to a vehicle, the step of inputting a sensor value from a sensor, and a first period in a first period using the input sensor value. Generating the dynamic information, and when there is a specific vehicle, the sensor information from the sensors existing in the peripheral area of the specific vehicle is used for the second cycle shorter than the first cycle. Generating dynamic information.

  According to another embodiment, the computer program is a computer program for causing a computer to function as an information providing device that provides dynamic information to a vehicle, the computer receiving an input of a sensor value from a sensor, and , Functioning as a generating unit that generates the first dynamic information in the first cycle using the input sensor value, and the generating unit exists in a peripheral area of the specific vehicle when the specific vehicle exists The second dynamic information is generated with a second period shorter than the first period using the sensor value from the sensor.

  According to the present invention, it is possible to optimize the load of update processing without impairing the real-time property of information provided to the vehicle.

1 is an overall configuration diagram of a wireless communication system according to an embodiment. It is a block diagram which shows an example of the internal structure of the edge server and core server which are included in a radio | wireless communications system. It is a block diagram which shows an example of the internal structure of the vehicle-mounted apparatus of the vehicle carrying the communication terminal contained in a radio | wireless communications system. It is a block diagram which shows an example of an internal structure of the pedestrian terminal which is a communication terminal contained in a radio | wireless communications system. It is a block diagram which shows an example of the internal structure of the roadside sensor carrying the communication terminal contained in a radio | wireless communications system. 1 is an overall configuration diagram of an information providing system according to an embodiment. It is a sequence diagram which shows an example of the update process of dynamic information in an information provision system, and a delivery process. It is a block diagram showing an example of a functional structure of an edge server. It is a figure for demonstrating the setting method of the area in the update process of an edge server. It is a figure for demonstrating the production | generation mode of dynamic information. It is a flowchart showing an example of the update process in an edge server.

[Description of Embodiment]
This embodiment includes at least the following. That is,
(1) An information providing apparatus included in the present embodiment generates an input unit that receives an input of a sensor value from a sensor, and generates first dynamic information in a first period using the input sensor value. And when the specific vehicle is present, the generation unit uses the sensor value from the sensor existing in the peripheral area of the specific vehicle to generate the second cycle with a second cycle shorter than the first cycle. Generate dynamic information.
For the peripheral area of the specific vehicle, the dynamic information with high real-time property is generated by generating the second dynamic information in the second cycle shorter than the first cycle. Therefore, when the dynamic information is provided to the specific vehicle, the specific vehicle can perform map display, travel support, and the like using the dynamic information having high real-time characteristics for the surrounding area. On the other hand, the second dynamic information is not generated in the second period over the entire area, and the generation of the first dynamic information in the first period is maintained for the area other than the peripheral area. Therefore, the update processing load is optimized.

(2) Preferably, the information providing apparatus further includes a storage unit that stores identification information of the specific vehicle, and the generation unit sets the vehicle whose identification information matches the identification information stored in the storage unit as the specific vehicle. 2 dynamic information is generated.
Thereby, the vehicle which produces | generates 2nd dynamic information can be limited to a specific vehicle. By being limited to a specific vehicle, the load of the dynamic information generation process can be efficiently reduced.

(3) Preferably, the second cycle includes a plurality of types of cycles according to the distance between the specific vehicle and the sensor, and the generation unit uses the sensor value from the sensor for the sensor existing in the peripheral area. Second dynamic information is generated at a period corresponding to the distance to the specific vehicle.
By setting the cycle stepwise according to the distance between the specific vehicle and the sensor, it is possible to efficiently reduce the load of the dynamic information generation process.

(4) Preferably, a production | generation part further superimposes the produced | generated 1st dynamic information and 2nd dynamic information on map information, and produces | generates the display information of a map.
Accordingly, it is possible to obtain display information of a map having high real-time characteristics around the specific vehicle, particularly useful by the driver of the specific vehicle.

(5) Preferably, a production | generation part changes the display mode of the area | region which superimposed the 1st dynamic information on the map, and the area | region which superimposed the 2nd dynamic information.
Thereby, the real-time property of the dynamic information on the map can be easily visually recognized.

(6) Preferably, an information provision apparatus is further provided with the determination part which determines a 2nd period according to the communication capability of the sensor which exists in a surrounding area.
For example, a sensor value transmitted from a sensor in the area is determined by determining a short cycle for an area where a sensor with high communication capability exists and a long cycle for an area where a sensor having low communication capability exists. Can be used to generate dynamic information.

(7) Preferably, a production | generation part produces | generates 2nd dynamic information according to the request | requirement from a specific vehicle.
Thereby, the vehicle which produces | generates 2nd dynamic information can be limited to a specific vehicle. By being limited to a specific vehicle, the load of the dynamic information generation process can be efficiently reduced.

(8) Preferably, the generation unit generates the second dynamic information when it is detected that the specific vehicle has entered a range in which a sensor having a communication capability corresponding to the second period exists.
Thereby, even if sensors having different communication capabilities are mixed in the peripheral area of the specific vehicle, useful dynamic information can be generated.

(9) The information providing method included in the present embodiment is a method for providing dynamic information to a vehicle in the information providing apparatus according to any one of (1) to (8).
This information providing method has the same effects as the information providing apparatuses (1) to (8).

(10) A computer program included in the present embodiment causes a computer to function as the information providing apparatus described in any one of (1) to (8).
Such a computer program has the same effects as the information providing apparatuses (1) to (8).

[Details of the embodiment]
Hereinafter, preferred embodiments will be described with reference to the drawings. In the following description, the same parts and components are denoted by the same reference numerals. Their names and functions are also the same. Therefore, these descriptions will not be repeated.

<First Embodiment>
[Overall configuration of wireless communication system]
FIG. 1 is a schematic diagram showing an overall configuration of a radio communication system according to the present embodiment. Referring to FIG. 1, a wireless communication system includes a plurality of communication terminals 1 </ b> A to 1 </ b> D capable of wireless communication, one or more base stations 2 that wirelessly communicate with communication terminals 1 </ b> A to 1 </ b> D, and wired or wirelessly with base station 2. It includes one or more edge servers 3 that communicate with each other and one or more core servers 4 that communicate with the edge servers 3 in a wired or wireless manner. Communication terminals 1A to 1D are also referred to as communication terminals 1 as representative.

  The core server 4 is installed in a core data center (DC) of the core network. The edge server 3 is installed in a distributed data center (DC) of a metro network. A metro network is a communication network constructed for each city, for example. Each metro network is connected to a core network. The base station 2 is communicably connected to any edge server 3 of the distributed data center included in the metro network.

  The core server 4 is communicably connected to the core network. The edge server 3 is communicably connected to the metro network. Therefore, the core server 4 can communicate with the edge server 3 and the base station 2 belonging to each metro network via the core network and the metro network. The base station 2 includes at least one of a macro cell base station, a micro cell base station, and a pico cell base station.

  In the wireless communication system according to the present embodiment, the edge server 3 and the core server 4 are general-purpose servers capable of SDN (Software-Defined Networking). The base station 2 and a relay device such as a repeater (not shown) are transport devices capable of SDN. Therefore, a plurality of virtual networks (network slices) S1 to S4 satisfying conflicting service request conditions such as low-latency communication and large-capacity communication can be defined as physical devices of the wireless communication system by network virtualization technology.

  The above-mentioned network virtualization technology is a basic concept of “fifth generation mobile communication system” (hereinafter abbreviated as “5G”) that is currently being standardized. Therefore, the wireless communication system according to the present embodiment includes, for example, 5G.

  However, the radio communication system according to the present embodiment is a mobile communication system capable of defining a plurality of network slices (hereinafter also referred to as “slices”) S1 to S4 according to predetermined service request conditions such as a delay time. What is necessary is not limited to 5G. Moreover, the hierarchy of slices to be defined is not limited to four, but may be five or more.

  In the example of FIG. 1, each network slice S1 to S4 is defined as follows. The slice S1 is a network slice defined so that the communication terminals 1A to 1D communicate directly. The communication terminals 1A to 1D that directly communicate in the slice S1 are also referred to as “node N1”.

  The slice S2 is a network slice defined so that the communication terminals 1A to 1D communicate with the base station 2. The highest communication node in the slice S2 (base station 2 in the illustrated example) is also referred to as “node N2”.

  The slice S3 is a network slice defined so that the communication terminals 1A to 1D communicate with the edge server 3 via the base station 2. The highest communication node (edge server 3 in the example) in the slice S3 is also referred to as “node N3”. In the slice S3, the node N2 becomes a relay node. That is, data communication is performed through an uplink path of node N1 → node N2 → node N3 and a downlink path of node N3 → node N2 → node N1.

  The slice S4 is a network slice defined so that the communication terminals 1A to 1D communicate with the core server 4 via the base station 2 and the edge server 3. The highest communication node in the slice S4 (core server 4 in the figure) is also referred to as “node N4”. In the slice S4, the node N2 and the node N3 are relay nodes. That is, data communication is performed by the uplink path of node N1 → node N2 → node N3 → node N4 and the downlink path of node N4 → node N3 → node N2 → node N1.

  In the slice S4, there is a case where the routing does not use the edge server 3 as a relay node. In this case, data communication is performed through the uplink path of node N1 → node N2 → node N4 and the downlink path of node N4 → node N2 → node N1.

  When a plurality of base stations 2 (node N2) are included in the slice S2, routing for tracing communication between the base stations 2 and 2 is also possible. Similarly, when a plurality of edge servers 3 (node N3) are included in the slice S3, routing for tracing communication between the edge servers 3 and 3 is also possible. When a plurality of core servers 4 (nodes N4) are included in the slice S4, routing that traces communication between the core servers 4 and 4 is also possible.

  The communication terminal 1 </ b> A is a wireless communication device mounted on the vehicle 5. The vehicles 5 include not only ordinary passenger cars but also public vehicles such as route buses and emergency vehicles. The vehicle 5 may be a two-wheeled vehicle (motorcycle) as well as a four-wheeled vehicle. The drive system of the vehicle 5 may be any of engine drive, electric motor drive, and hybrid system. The driving method of the vehicle 5 may be any of normal driving in which the passenger performs operations such as acceleration / deceleration and steering of the steering wheel, and automatic driving in which the operation is performed by software.

  The communication terminal 1 </ b> A of the vehicle 5 may be an existing wireless communication device in the vehicle 5, or may be a portable terminal brought into the vehicle 5 by a passenger. The passenger's portable terminal temporarily becomes an in-vehicle wireless communication device by being connected to an in-vehicle LAN (Local Area Network) of the vehicle 5.

  Communication terminal 1B is a portable terminal (pedestrian terminal) carried by pedestrian 7. The pedestrian 7 is a person who moves on foot such as outdoors on roads and parking lots and indoors such as in buildings and underground shopping streets. The pedestrian 7 includes not only a person walking but also a person who rides on a bicycle having no power source.

  The communication terminal 1 </ b> C is a wireless communication device mounted on the roadside sensor 8. The roadside sensor 8 is an image type vehicle detector installed on the road, a security camera installed outdoors or indoors, and the like. The communication terminal 1D is a wireless communication device mounted on the traffic signal controller 9 at the intersection.

  The service request conditions for the slices S1 to S4 are as follows. Delay times D1 to D4 allowed for the slices S1 to S4 are defined such that D1 <D2 <D3 <D4. For example, D1 = 1 ms, D2 = 10 ms, D3 = 100 ms, and D4 = 1 s. Data communication amounts C1 to C4 per predetermined period (for example, one day) allowed for the slices S1 to S4 are defined to satisfy C1 <C2 <C3 <C4. For example, C1 = 20 GB, C2 = 100 GB, C3 = 2 TB, C4 = 10 TB.

  As described above, in the wireless communication system of FIG. 1, direct wireless communication in the slice S1 (for example, “vehicle-to-vehicle communication” in which the communication terminal 1A of the vehicle 5 directly communicates) and the slice that passes through the base station 2 S2 wireless communication is possible. However, in the present embodiment, an information providing service for users included in a relatively wide service area (for example, an area including a municipality or a prefecture) using slice S3 and slice S4 in the wireless communication system of FIG. Is assumed.

[Internal configuration of edge server and core server]
FIG. 2 is a block diagram illustrating an example of the internal configuration of the edge server 3 and the core server 4. Referring to FIG. 2, the edge server 3 includes a control unit 31 including a CPU (Central Processing Unit), a ROM (Read Only Memory) 32, a RAM (Random Access Memory) 33, a storage unit 34, and a communication unit 35. including.

  The control unit 31 reads one or more programs stored in advance in the ROM 32 into the RAM 33 and executes them, thereby controlling the operation of each hardware and communicating the computer device with the core server 4 or the base station 2. It functions as the edge server 3.

  The RAM 33 is composed of a volatile memory element such as SRAM (Static RAM) or DRAM (Dynamic RAM), and temporarily stores a program executed by the control unit 31 and data necessary for the execution.

  The storage unit 34 includes a nonvolatile memory element such as a flash memory or an EEPROM (Electrically Erasable Programmable Read Only Memory), or a magnetic storage device such as a hard disk.

  The communication unit 35 is a communication device or the like that executes 5G compatible communication processing, and communicates with the core server 4 and the base station 2 via the metro network. The communication unit 35 transmits the information given from the control unit 31 to the external device via the metro network and gives the information received via the metro network to the control unit 31.

  The storage unit 34 stores an information map (hereinafter also simply referred to as “map”) M1. The map M1 is a collection of data (virtual database) in which dynamic information that changes every moment is superimposed on a high-definition digital map that is static information, and is map display information. .

  “Dynamic information” (˜1 second) refers to dynamic data that requires a delay time of 1 second or less. For example, the position information of a moving body (such as a vehicle and a pedestrian) and signal information that are utilized as ITS (Intelligent Transport Systems) look-ahead information correspond to dynamic information.

  “Static information” (˜1 month) refers to static data in which a delay time within one month is allowed. For example, road surface information, lane information, and three-dimensional structure data correspond to static information.

  The control unit 31 of the edge server 3 updates the dynamic information of the map M1 stored in the storage unit 34 every predetermined update cycle (update process). Specifically, the control unit 31 collects, from each communication terminal 1A to 1D, various sensor information measured by the vehicle 5, the roadside sensor 8, and the like within the service area of the own device for each predetermined update period. The dynamic information of the map M1 is updated based on the sensor information.

  When the control unit 31 receives a dynamic information request message from a specific vehicle 5, the control unit 31 updates the dynamic information for each predetermined update period, and the latest dynamic information is mounted on the vehicle 5 (from which the request message is transmitted. Distributed to the communication terminal 1A) (distribution processing). The specific vehicle 5 is a vehicle registered in advance in the storage unit 34.

  Preferably, the control unit 31 collects traffic information and weather information of each location in the service area from a traffic control center, a private weather service support center, and the like, and based on the collected information, dynamic information or static information of the map M1 is collected. Information may be updated.

  Further, referring to FIG. 2, the core server 4 includes a control unit 41 including a CPU, a ROM 42, a RAM 43, a storage unit 44, and a communication unit 45.

  The control unit 41 reads one or more programs stored in advance in the ROM 32 into the RAM 43 and executes them to control the operation of each hardware and function as a core server 4 capable of communicating with the edge server 3. Let

  The RAM 43 is composed of a volatile memory element such as SRAM or DRAM, and temporarily stores a program executed by the control unit 41 and data necessary for the execution.

  The storage unit 44 is configured by a nonvolatile memory element such as a flash memory or an EEPROM, or a magnetic storage device such as a hard disk.

  The communication unit 45 is a communication device that executes 5G-compatible communication processing, and communicates with the edge server 3, the base station 2, and the like via a core network. The communication unit 45 transmits information given from the control unit 41 to the external device via the core network, and gives information received via the core network to the control unit 41.

  As shown in FIG. 2, the storage unit 44 of the core server 4 stores an information map M2. The data structure of the map M2 (data structure including dynamic information and static information) is the same as the data structure of the map M1. The map M2 may be a map of the same service area as the map M1 of the specific edge server 3, or may be a wider area map in which the maps M1 held by the plurality of edge servers 3 are integrated.

  Similar to the control unit 31 of the edge server 3, the control unit 41 of the core server 4 updates the dynamic information of the map M2 stored in the storage unit 44, and sends the dynamic information in response to the request message. Distribution processing for distribution may be performed. That is, the control unit 41 may be able to execute the update process and the distribution process based on the map M2 of its own device independently of the edge server 3.

  Preferably, the control unit 41 collects traffic information and weather information of each location in the service area from a traffic control center, a private weather service support center, and the like, and based on the collected information, dynamic information or static information of the map M2 is collected. Information may be updated.

[Internal configuration of in-vehicle device]
FIG. 3 is a block diagram illustrating an example of an internal configuration of the in-vehicle device 50 of the vehicle 5 on which the communication terminal 1A is mounted. Referring to FIG. 3, an in-vehicle device 50 of a vehicle 5 includes a control unit (ECU: Electronic Control Unit) 51, a GPS receiver 52, a vehicle speed sensor 53, a gyro sensor 54, a storage unit 55, a display 56, a speaker 57, and an input. A device 58, an in-vehicle camera 59, a radar sensor 60, and a communication unit 61 are included.

  The communication unit 61 is the above-described communication terminal 1A, that is, a wireless communication device capable of performing communication processing compatible with 5G, for example. Therefore, the vehicle 5 can communicate with the edge server 3 as a kind of mobile terminal belonging to the slice S3. The vehicle 5 can also communicate with the core server 4 as a kind of mobile terminal belonging to the slice S4.

  The control unit 51 is a computer device that performs route search of the vehicle 5 and control of the other electronic devices 52 to 61. The control unit 51 obtains the vehicle position of the host vehicle from GPS signals that the GPS receiver 52 periodically acquires. Further, the control unit 51 complements the vehicle position and direction based on the input signals of the vehicle speed sensor 53 and the gyro sensor 54, and grasps the accurate current position and direction of the vehicle 5. The GPS receiver 52, the vehicle speed sensor 53, and the gyro sensor 54 are sensors that measure the current position, speed, and direction of the vehicle 5.

  The storage unit 55 includes a map database. The map database provides road map data to the control unit 51. The road map data includes link data and node data, and is stored in a recording medium such as a DVD, CD-ROM, memory card, or HDD. The storage unit 55 reads out necessary road map data from the recording medium and provides it to the control unit 51.

  The display 56 and the speaker 57 are output devices for notifying a user who is a passenger of the vehicle 5 of various information generated by the control unit 51. Specifically, the display 56 displays an input screen for route search, a map image around the host vehicle, route information to the destination, and the like. The speaker 57 outputs an announcement or the like for guiding the vehicle 5 to the destination. These output devices can also notify the passenger of the provision information received by the communication unit 61.

  The input device 58 is a device for a passenger of the vehicle 5 to perform various input operations. The input device 58 includes an operation switch provided on the handle, a touch panel provided on the joystick display 56, and a combination thereof. The input device 58 may be a voice recognition device that receives input by voice recognition of a passenger. The input signal generated by the input device 58 is transmitted to the control unit 51.

  The in-vehicle camera 59 is an image sensor that captures an image in front of the vehicle 5. The in-vehicle camera 59 may be either monocular or compound eye. The radar sensor 60 is a sensor that detects an object existing in front of or around the vehicle 5 by a millimeter wave radar, a LiDAR method, or the like. Based on the measurement data from the in-vehicle camera 59 and the radar sensor 60, the control unit 51 executes driving support control that outputs a warning to the occupant during driving to the display 56 or performs forced braking intervention. be able to.

  The control unit 51 is configured by an arithmetic processing device such as a microcomputer that executes various control programs stored in the storage unit 55. The control unit 51 executes the above-described control program to display a map image on the display 56, a function to calculate a route from the departure point to the destination (including the position if there is a relay point), Various navigation functions such as a function of guiding the vehicle 5 to the destination according to the calculated route can be executed.

  Based on the measurement data of at least one of the in-vehicle camera 59 and the radar sensor 60, the control unit 51 performs object recognition processing for recognizing an object in front of or around the host vehicle, and measurement for calculating a distance to the recognized object. Distance processing can be executed. The control unit 51 can calculate the position information of the object recognized by the object recognition process from the distance calculated by the distance measurement process and the sensor position of the host vehicle.

The control unit 51 can execute the following processes in communication with the edge server 3 (which may be the core server 4).
1) Request message transmission processing 2) Dynamic information reception processing 3) Change point information calculation processing 4) Change point information transmission processing

  The request message transmission process is a process of transmitting, to the edge server 3, a control packet for requesting distribution of dynamic information of the map M1 that is sequentially updated by the edge server 3. The control packet includes the vehicle ID of the host vehicle.

  When the edge server 3 receives a request message including a predetermined vehicle ID, the edge server 3 updates the dynamic information at a predetermined update cycle, and updates the dynamic information to the communication terminal 1A of the vehicle 5 having the transmission source vehicle ID. To deliver. The dynamic information receiving process is a process of receiving the dynamic information distributed by the edge server 3 to the own apparatus.

  The change point information calculation process in the vehicle 5 is a process for calculating a change amount between the received dynamic information and the comparison result between the sensor information of the host vehicle at the time of reception. The change point information calculated by the vehicle 5 is, for example, the following information examples a1 to a2.

Information example a1: Change point information regarding a recognized object The control unit 51 detects the object X by its own object recognition process, although the received dynamic information does not include the object X (vehicle, pedestrian, obstacle, etc.) In such a case, the detected image data of the object X and the position information are used as change point information. When the position information of the object X included in the received dynamic information and the position information of the object X obtained by its own object recognition process are shifted by a predetermined threshold or more, the control unit 51 detects the detected object X And the difference value between the position information of the two are used as change point information.

Information example a2: Change point information regarding own vehicle The control unit 51 deviates the position information of the own vehicle included in the received dynamic information from the vehicle position of the own vehicle calculated by the GPS signal by a predetermined threshold or more. If they are different, the difference value between them is used as change point information. When the direction of the own vehicle included in the received dynamic information and the direction of the own vehicle calculated from the measurement data of the gyro sensor 54 are different from each other by a predetermined threshold or more, the control unit 51 determines the difference between the two. The value is used as change point information.

  When calculating the change point information as described above, the control unit 51 generates a communication packet addressed to the edge server 3 including the calculated change point information. The control unit 51 includes the vehicle ID of the host vehicle in the communication packet. The change point information transmission process is a process of transmitting the communication packet including the change point information in the data to the edge server 3. The change point information transmission processing is performed within the dynamic information update cycle by the edge server 3.

  Based on the dynamic information received from the edge server 3 or the like, the control unit 51 executes driving support control that causes the display 56 to output a warning for a driver who is driving or to perform forced braking intervention. You can also.

[Internal configuration of pedestrian terminal]
FIG. 4 is a block diagram illustrating an example of an internal configuration of the pedestrian terminal 70 that is the communication terminal 1B. The pedestrian terminal 70 in FIG. 4 is a wireless communication device capable of 5G-compatible communication processing, for example. Therefore, the pedestrian terminal 70 can communicate with the edge server 3 as a kind of mobile terminal belonging to the slice S3. The pedestrian terminal 70 can also communicate with the core server 4 as a kind of mobile terminal belonging to the slice S4.

  Referring to FIG. 4, pedestrian terminal 70 includes a control unit 71, a storage unit 72, a display unit 73, an operation unit 74, and a communication unit 75.

  The communication unit 75 is a communication interface that wirelessly communicates with the base station 2 of the carrier that provides the 5G service. The communication unit 75 converts the RF signal from the base station 2 into a digital signal and outputs it to the control unit 71. Further, the communication unit 75 converts the digital signal input from the control unit 71 into an RF signal and transmits the RF signal to the base station 2.

  The control unit 71 includes a CPU, a ROM, and a RAM. The control unit 71 reads out and executes the program stored in the storage unit 72 and controls the overall operation of the pedestrian terminal 70.

  The storage unit 72 includes a hard disk, a nonvolatile memory, and the like, and stores various computer programs and data. In addition, the storage unit 72 stores a mobile ID that is identification information of the pedestrian terminal 70. The mobile ID is, for example, a unique user ID or MAC address of the carrier contractor.

  Furthermore, the storage unit 72 stores various application software arbitrarily installed by the user. The application software stored in the storage unit 72 is, for example, application software for receiving an information providing service for receiving dynamic information of the map M1 by 5G communication with the edge server 3 (or the core server 4). Including.

  The operation unit 74 includes various operation buttons and a touch panel function of the display unit 73. The operation unit 74 outputs an operation signal corresponding to a user operation to the control unit 71.

  The display unit 73 is, for example, a liquid crystal display. The display unit 73 presents various information to the user. For example, the display unit 73 displays the image data of the information maps M1 and M2 transmitted from the servers 3 and 4 on the screen.

  The control unit 71 uses the time synchronization function to acquire the current time from the GPS signal, the position detection function to measure the current position (latitude, longitude, and altitude) of the host vehicle from the GPS signal, and the direction sensor to determine the direction of the pedestrian 7. And a direction detection function for measuring.

The control unit 71 can execute the following processes in communication with the edge server 3 (which may be the core server 4).
1) Request message transmission processing 2) Terminal state information transmission processing 3) Dynamic information reception processing

  The request message transmission process is a process of transmitting, to the edge server 3, a control packet for requesting distribution of dynamic information of the map M1 that is sequentially updated by the edge server 3. The control packet includes the mobile ID of the pedestrian terminal 70.

  When the edge server 3 receives the request message including the predetermined mobile ID, the edge server 3 updates the dynamic information at a predetermined update cycle, and sends the updated dynamic information to the communication terminal 1B of the pedestrian 7 having the mobile ID of the transmission source. Information is distributed. The terminal state information transmission process is a process of transmitting the state information of the pedestrian terminal 70 such as the position and direction information of the own device to the edge server 3.

  The dynamic information receiving process is a process of receiving the dynamic information distributed by the edge server 3 to the own apparatus.

[Internal configuration of roadside sensor]
FIG. 5 is a block diagram showing an example of the internal configuration of the roadside sensor 8 equipped with a wireless communication device that is the communication terminal 1C. Referring to FIG. 5, roadside sensor 8 includes a control unit 81, a storage unit 82, a roadside camera 83, a radar sensor 84, and a communication unit 85.

  The communication unit 85 is the above-described communication terminal 1 </ b> C, that is, a wireless communication device capable of communication processing such as 5G correspondence. Therefore, the roadside sensor 8 can communicate with the edge server 3 as a kind of fixed terminal belonging to the slice S3. The roadside sensor 8 can also communicate with the core server 4 as a kind of fixed terminal belonging to the slice S4.

  The control unit 81 includes a CPU, a ROM, and a RAM. The control unit 81 reads and executes the program stored in the storage unit 82 and controls the overall operation of the roadside sensor 8.

  The storage unit 82 includes a hard disk, a nonvolatile memory, and the like, and stores various computer programs and data. The storage unit 82 stores a sensor ID that is identification information of the roadside sensor 8. The sensor ID is, for example, a user ID unique to the owner of the roadside sensor 8 or a MAC address.

  The roadside camera 83 is an image sensor that captures an image of a predetermined shooting area. The roadside camera 83 may be either monocular or compound eye. The radar sensor 60 is a sensor that detects an object existing in front of or around the vehicle 5 by a millimeter wave radar, a LiDAR method, or the like.

  When the roadside sensor 8 is a security camera, the control unit 81 transmits the captured video data or the like to the security manager computer device. When the roadside sensor 8 is an image type vehicle detector, the control unit 81 transmits the captured video data and the like to the traffic control center.

  The control unit 81 performs object recognition processing for recognizing an object in the shooting area based on at least one measurement data of the roadside camera 83 and the radar sensor 84, and distance measurement processing for calculating a distance to the recognized object. Can be executed. The control unit 51 can calculate the position information of the object recognized by the object recognition process from the distance calculated by the distance measurement process and the sensor position of the host vehicle.

The control unit 81 can execute the following processes in communication with the edge server 3 (which may be the core server 4).
1) Change point information calculation process 2) Change point information transmission process

  The calculation process of the change point information in the roadside sensor 8 is based on the comparison result between the previous sensor information and the current sensor information for each predetermined measurement cycle (for example, the dynamic information update cycle by the edge server 3). This is a process of calculating the amount of change between sensor information. The change point information calculated by the roadside sensor 8 is, for example, the following information example b1.

Information example b1: Change point information regarding the recognized object The control unit 81 detects the object Y by the current object recognition process, although the object Y (vehicle, pedestrian, obstacle, etc.) is not included in the previous object recognition process. In this case, the detected image data and position information of the object Y are used as change point information. When the position information of the object Y obtained by the previous object recognition process and the position information of the object X obtained by the current object recognition process are shifted by a predetermined threshold or more, the control unit 81 detects the detected object Y. And the difference value between them are used as change point information.

  When calculating the change point information as described above, the control unit 81 generates a communication packet addressed to the edge server 3 including the calculated change point information. The control unit 81 includes the sensor ID of its own device in the communication packet. The change point information transmission process is a process of transmitting the communication packet including the change point information in the data to the edge server 3. The change point information transmission processing is performed within the dynamic information update cycle by the edge server 3.

[Overall configuration of information provision system]
FIG. 6 is an overall configuration diagram of the information providing system according to the present embodiment. Referring to FIG. 6, the information providing system according to the present embodiment includes a large number of vehicles 5, pedestrian terminals 70, and roadside sensors 8 scattered in a service area (real word) of edge server 3 that is relatively wide. And an edge server 3 which can perform wireless communication with low delay by 5G communication via these communication nodes and the base station 2 and functions as an information providing apparatus.

  The edge server 3 collects the aforementioned change point information at a predetermined cycle from the vehicle 5 and the roadside sensor 8 in the service area (step S31). The edge server 3 integrates the collected change point information by map matching (integration processing), and updates the dynamic information of the information map M1 being managed (step S32).

  If there is a request from the vehicle 5 or the pedestrian terminal 70, the edge server 3 transmits the latest dynamic information to the requesting communication node (step S33). Thereby, for example, the vehicle 5 that has received the dynamic information can use the dynamic information for driving assistance of the passenger.

  The edge server 3 updates the map M1 by superimposing the updated dynamic information on the static information. In step S33, the edge server 3 adds the updated map M1 to the request source in addition to the dynamic information. You may transmit to a communication node. In the following description, distribution of dynamic information includes distribution of dynamic information and a map M1 generated by superimposing the dynamic information on static information.

  When the vehicle 5 that has received the dynamic information detects change point information with the sensor information of the host vehicle based on the dynamic information, the vehicle 5 transmits the detected change point information to the edge server 3 (step S34).

  Thus, in the information provision system of this embodiment, change point information collection (step S31) → dynamic information update (step S32) → dynamic information distribution (step S33) → change point information detection by a vehicle (Step S34) → Information processing in each communication node circulates in the order of change point information collection (Step S31).

  Although FIG. 6 illustrates an information providing system including only one edge server 3, the information providing system may include a plurality of edge servers 3, instead of the edge server 3, or in addition to the edge server 3. One or a plurality of core servers 4 may be included. The information map M1 managed by the edge server 3 may be a map in which at least dynamic information of an object is superimposed on map information such as a digital map. This also applies to the core server information map M2.

[Dynamic information update processing and distribution processing]
FIG. 7 is a sequence diagram showing an example of dynamic information update processing and distribution processing executed by cooperation of the pedestrian terminal 70, the vehicle 5, the roadside sensor 8, and the edge server 3. In the following description, the execution subject is the pedestrian terminal 70, the vehicle 5, the roadside sensor 8, and the edge server 3, but the actual execution subject is the control units 71, 51, 81, and 31. U in FIG. 7 is a dynamic information update cycle.

  Referring to FIG. 7, when the edge server 3 receives the dynamic information request message from the pedestrian terminal 70 and the vehicle 5 (step S <b> 1), the edge server 3 transmits the latest dynamic information at the time of reception to the pedestrian terminal that is the transmission source. 70 and the vehicle 5 (step S2).

  Preferably, in step S1, the edge server 3 analyzes the received request message, and when the information indicating the request source included in the message is information indicating the communication terminal 1 registered in advance, Send dynamic information to the source.

  If there is a request message from one of the pedestrian terminal 70 and the vehicle 5 in step S1, dynamic information is distributed only to one communication terminal that is the transmission source of the request message in step S2. The

  When the edge server 3 receives the dynamic information request message from the pedestrian terminal 70 and the vehicle 5 (step S1), the specific server 5A (hereinafter referred to as a specific vehicle) is included in the transmission source of the request message (see FIG. 9). If there is, the update period U is determined based on the position of the specific vehicle 5A (step S21).

  When the vehicle 5 that has received the dynamic information distributed in step S2 detects change point information from a comparison result between the dynamic information and its own sensor information (step S3), the detected change point information is transmitted to the edge server 3. (Step S5). Further, when the roadside sensor 8 detects the change point information of its own sensor information, the roadside sensor 8 transmits the detected change point information to the edge server 3 (step S5).

  When the edge server 3 receives the change point information from the vehicle 5 and the roadside sensor 8 within the update cycle U from the distribution in step S2, the edge server 3 updates the previous dynamic information to the dynamic information reflecting the change point information ( Step S6), the updated dynamic information is distributed to the pedestrian terminal 70 and the vehicle 5 (step S7). The cycle determination process in step S21 and the dynamic information update process in step S6 are also referred to as an update process.

  If only the vehicle 5 detects the change point information, only the change point information detected by the vehicle 5 in step S3 is transmitted to the edge server 3 (step S5), and dynamic information reflecting only the change point information. Is updated (step S6). When only the roadside sensor 8 detects the change point information, only the change point information detected by the roadside sensor 8 in step S4 is transmitted to the edge server 3 (step S5), and dynamic information reflecting only the change point information. Is updated (step S6). If neither the vehicle 5 nor the roadside sensor 8 detects the change point information, the processes in steps S3 to S6 are not executed, and the same dynamic information as the dynamic information for the previous transmission (step S2) is displayed. It is distributed to the pedestrian terminal 70 and the vehicle 5 (step S7).

  When the vehicle 5 that has received the dynamic information distributed in step S7 detects change point information from the comparison result between the dynamic information and its own sensor information (step S8), the detected change point information is transmitted to the edge server 3. (Step S10). Further, when the roadside sensor 8 detects the change point information of its own sensor information, the roadside sensor 8 transmits the detected change point information to the edge server 3 (step S10).

  When the edge server 3 receives the change point information from the vehicle 5 and the roadside sensor 8 within the update cycle U from the distribution in step S7, the edge server 3 updates the previous dynamic information to the dynamic information reflecting the change point information ( Step S11), the updated dynamic information is distributed to the pedestrian terminal 70 and the vehicle 5 (step S12).

  When only the vehicle 5 detects the change point information, only the change point information detected by the vehicle 5 in step S8 is transmitted to the edge server 3 (step S10), and the dynamic information that reflects only the change point information is updated. Is performed (step S11). When only the roadside sensor 8 detects the change point information, only the change point information detected by the roadside sensor 8 in step S9 is transmitted to the edge server 3 (step S10), and dynamic information reflecting only the change point information. Is updated (step S11). Also in this case, the updated dynamic information is distributed to the pedestrian terminal 70 and the vehicle 5 (step S12). When both the vehicle 5 and the roadside sensor 8 do not detect the change point information, the processes in steps S8 to S11 are not executed, and the same dynamic information as the previously transmitted dynamic information (step S7) is displayed. It is distributed to the terminal 70 and the vehicle 5 (step S12).

  The sequence similar to the above is repeated until either a dynamic information distribution stop request message is received from both the pedestrian terminal 70 and the vehicle 5 or communication between the pedestrian terminal 70 and the vehicle 5 is interrupted. .

[Functional configuration of edge server]
FIG. 8 is a block diagram illustrating an example of a functional configuration for the edge server 3 to execute the update process. Each function of FIG. 8 is mainly realized by the CPU when the CPU of the control unit 31 of the edge server 3 reads out and executes one or more programs stored in the ROM 32 to the RAM 33.

  Referring to FIG. 8, the control unit 31 of the edge server 3 accepts input of data indicating sensor values from the plurality of sensors of the vehicle 5 and the plurality of roadside sensors 8 as a function for executing the update process. Generated by the generation unit 312 and the generation unit 312 that generate (update) dynamic information by analyzing the sensor value, acquiring change point information from each sensor, and performing integration processing on the change point. The output unit 313 that instructs the communication unit 35 to distribute the dynamic information to the vehicle 5 and the like, and the determination unit 314 that determines the update cycle.

  FIG. 9 is a diagram for explaining a method for determining an update cycle in the determination unit 314, and is a diagram for explaining a method for setting an area. FIG. 9 shows an example of the service area of the edge server 3, and in this example, the edge server 3 represents a case where the request message in step S1 of FIG. 7 is received from the vehicle 5A.

  For convenience, the upward direction in FIG. 9 is north, the downward direction is south, the right direction is east, and the left direction is west. The service area of FIG. 9 includes a north-south road R1, three east-west roads R2, R3, and R4 intersecting the road R1, and a north-south road R5. The roads R2, R3, R4 intersect with the road R1 in this order in the north direction, and constitute intersections CP1, CP2, CP3, respectively. Further, the road R5 extends southward from the east end of the road R3, and intersects the road R2 to form an intersection CP4. Road R5 constitutes an intersection CP5 at the east end of road R3. The vehicle 5A is traveling northward on the south end of the page of the road R1.

  The storage unit 34 of the edge server 3 stores identification information of a specific vehicle in advance. When the determination unit 314 receives the request message in step S1, the determination unit 314 compares the identification information of the transmission source included in the request message with the identification information of the specific vehicle stored in the storage unit 34, and the request message is received from the specific vehicle. It is determined whether it is a thing. When the request message is from the specific vehicle 5A, the determination unit 314 specifies the position of the specific vehicle 5A based on the position information of the specific vehicle 5A included in the request message. Then, the determination unit 314 sets at least two types of areas on the service area according to the distance from the specific vehicle 5A. The two types of areas are composed of a peripheral area with a short distance from the specific vehicle 5A and a non-peripheral area with a long distance. As an example, the determination unit 314 sets an area where the distance from the specific vehicle 5A is equal to or smaller than the threshold as a peripheral area, and an area where the distance from the specific vehicle 5A is larger than the threshold as a non-peripheral area. An area EA in FIG. 9 represents a peripheral area.

  Preferably, the determination unit 314 sets three or more types of areas on the service area of FIG. 9 according to the distance from the specific vehicle 5A. The three or more types of areas are a peripheral area closest to the specific vehicle 5A, an area in the vicinity of the peripheral area closest to the specific vehicle 5A next to the peripheral area, and a peripheral area not far from the specific vehicle 5A. Including nearby areas. As an example, the determination unit 314 has an area where the distance from the specific vehicle 5A is equal to or less than the first threshold as a surrounding area, the distance from the specific vehicle 5A is larger than the first threshold, and (less than the first threshold). An area smaller than the second threshold is set as an area near the surrounding area, and an area whose distance from the specific vehicle 5A is larger than the second threshold is set as an area near the surrounding area. Area EB and area EC in FIG. 9 represent an area in the vicinity of the peripheral area and an area in the vicinity of the peripheral area.

  Referring to FIG. 9, area EA is a peripheral area of specific vehicle 5A, and is a range extending from the position of specific vehicle 5A on road R1 to the south side of intersection CP2, and in a range extending east and west of intersection CP1 on road R2. is there.

  Preferably, when the planned travel route of the specific vehicle 5A can be acquired from a navigation device or a driving support device mounted on the specific vehicle 5A, the determination unit 314 travels in addition to the periphery of the vehicle 5A and the front in the traveling direction. The area extending in front of the planned route and crossing the route is set as area EA.

  The area EB is an area in the vicinity of the peripheral area of the specific vehicle 5A, and is a range extending east-west of the intersection CP2, a range extending north-south, the west end of the road R2, and the vicinity of the intersection CP4.

  The area EC is an area that is not near the peripheral area of the specific vehicle 5A, and is the entire road R4, the west end of the road R3, and a range from the intersection CP5 of the road R5 to the north side of the intersection CP4.

  The update cycle may be defined for each area in advance. Or the determination part 314 may determine an update period about the set areas EA and EB. As an example, the determination unit 314 determines the update cycle according to the protocol for receiving sensor values from the sensors existing in the areas EA and EB, that is, the communication format of the sensors existing in the areas EA and EB. Specifically, for an area where a sensor with high communication capability exists, a short update cycle is determined. For an area where a sensor with low communication capability exists, a long update cycle is determined.

  For the sensors existing in the area EA, the generation unit 312 updates (generates) dynamic information using a sensor value from the sensor at a high update period shorter than a normal period described later. The high period is, for example, about 100 milliseconds. As the dynamic information update period is shorter, the real-time property of the dynamic information is improved. That is, the real-time property of the dynamic information about the specific vehicle 5A peripheral area is improved. Thereby, the usefulness of the dynamic information delivered to the specific vehicle 5A can be improved.

  The generation unit 312 uses the sensor value from the sensor for the sensor existing in the area EB to update the dynamic information with a medium period shorter than the normal period described later and longer than the high period ( Generated). The middle period is, for example, about 500 milliseconds.

  The generation unit 312 updates (generates) dynamic information with respect to a sensor existing in the area EC, using a sensor value from the sensor, at an update cycle of a normal cycle described later. The normal period is, for example, about 10 seconds.

  FIG. 10 is a diagram for describing a dynamic information generation method in the generation unit 312 for each dynamic information generation mode. FIG. 10 illustrates an example in which the generation unit 312 updates dynamic information based on sensor values from three sensors A, B, and C. The sensor value is the above-described change point information detected by each sensor, and is transmitted from each sensor to the edge server 3 in steps S5, S10,.

  In FIG. 7, for the sake of convenience, the sensors are shown to transmit the change point information all at once, but in actuality, as shown in FIG. 10, each sensor changes at the timing when the change point information is detected. The point information is transmitted to the edge server 3. The generation unit 312 updates the dynamic information using sensor values input at a timing corresponding to the period determined by the determination unit 314 among the sensor values input from the sensors to the input unit 311.

  The columns indicated by sensors A, B, and C from the left in FIG. 10 indicate sensor value inputs that the input unit 311 receives from each sensor as time passes from the top to the bottom of the page. The input unit 311 accepts input of sensor values SA1, SA2, SA3,..., SA9 from the sensor A at approximately equal intervals. The input unit 311 accepts input of sensor values SB1, SB2,..., SB8 from the sensor B at approximately equal intervals. The input unit 311 accepts input of sensor values SC1, SC2,..., SC7 from the sensor C at approximately equal intervals.

  The period U1 indicates a normal period. A mode in which the generation unit 312 generates dynamic information in a normal cycle is referred to as a normal mode (first mode). In the normal mode, the generation unit 312 collects sensor values from the sensors A, B, and C in a cycle U1 and updates (generates) dynamic information. The dynamic information generated in the normal mode is also referred to as first dynamic information.

  In FIG. 10, in the normal mode, the generation unit 312 updates the dynamic information at time t1 to generate dynamic information DI11. As the dynamic information DI11, the sensor value SA1 from the sensor A, the sensor value SB1 from the sensor B, and the sensor value SC1 from the sensor C are used.

  Next, the generation unit 312 updates the dynamic information at time t5 after the period U1 has elapsed from time t1, and generates dynamic information DI12. In the dynamic information DI12, the sensor value SA5 from the sensor A, the sensor value SB5 from the sensor B, and the sensor value SC4 from the sensor C are used.

  Next, the generation unit 312 updates the dynamic information at time t9 after the period U1 has elapsed from time t5, and generates dynamic information DI13. In the dynamic information DI13, a sensor value SA9 from the sensor A, a sensor value SB8 from the sensor B, and a sensor value SC7 from the sensor C are used.

  The period U3 indicates a high period (U3 <U1). A mode in which the generation unit 312 generates dynamic information at a high cycle is referred to as a high cycle mode (second mode). In the high cycle mode, the generation unit 312 collects sensor values from the sensors A, B, and C and updates (generates) the dynamic information in the cycle U3. The dynamic information generated in the high cycle mode is also referred to as second dynamic information.

  In FIG. 10, the generation unit 312 updates the dynamic information at time t1 to generate dynamic information DI31 in the high cycle mode. In the dynamic information DI31, the sensor value SA1 from the sensor A, the sensor value SB1 from the sensor B, and the sensor value SC1 from the sensor C are used. In the example of FIG. 10, the dynamic information DI31 is the same information as the dynamic information DI11 generated at time t1 in the normal mode.

  Next, the generation unit 312 updates the dynamic information at time t2 after the period U3 has elapsed from time t1, and generates dynamic information DI32. In the dynamic information DI32, the sensor value SA2 from the sensor A, the sensor value SB1 from the sensor B, and the sensor value SC1 from the sensor C are used.

  Next, the generation unit 312 updates the dynamic information at time t3 after the period U3 has elapsed from time t2, and generates dynamic information DI33. In the dynamic information DI33, the sensor value SA3 from the sensor A, the sensor value SB3 from the sensor B, and the sensor value SC2 from the sensor C are used.

  Thereafter, the generation unit 312 updates the dynamic information for each cycle U3.

  Preferably, the determination unit 314 sets the area EB in the service area as illustrated in FIG. The period U2 indicates a medium period (U3 <U2 <U1). A mode in which the generation unit 312 generates dynamic information in a medium cycle is referred to as a medium cycle mode (second mode). In the medium cycle mode, the generation unit 312 collects sensor values from the sensors A, B, and C and updates (generates) dynamic information in the cycle U2. Dynamic information generated in the medium cycle mode is also referred to as third dynamic information.

  In FIG. 10, in the middle cycle mode, the generation unit 312 updates the dynamic information at time t1 to generate dynamic information DI21. In the dynamic information DI21, the sensor value SA1 from the sensor A, the sensor value SB1 from the sensor B, and the sensor value SC1 from the sensor C are used. In the example of FIG. 10, the dynamic information DI21 is the same information as the dynamic information DI11 generated at the time t1 in the normal mode and the dynamic information DI31 generated at the time t1 in the high cycle mode.

  Next, the generation unit 312 generates dynamic information DI22 by updating the dynamic information at time t3 after the period U2 has elapsed from time t1. In the dynamic information DI22, the sensor value SA3 from the sensor A, the sensor value SB3 from the sensor B, and the sensor value SC3 from the sensor C are used. In the example of FIG. 10, the dynamic information DI22 is the same information as the dynamic information DI33 generated at time t3 in the high cycle mode.

  Next, the generation unit 312 updates the dynamic information at time t5 after the period U2 has elapsed from time t3, and generates dynamic information DI23. In the dynamic information DI23, the sensor value SA5 from the sensor A, the sensor value SB5 from the sensor B, and the sensor value SC4 from the sensor C are used. In the example of FIG. 10, the dynamic information DI23 is the same information as the dynamic information DI12 generated at time t5 in the normal mode and the dynamic information DI35 generated at time t5 in the high cycle mode.

  Thereafter, the generation unit 312 updates the dynamic information for each cycle U2.

  The generation unit 312 generates dynamic information (first dynamic information) in the normal mode in a state where the request message from the specific vehicle 5A is not received, that is, in a state where the area is not set by the determination unit 314. The map M1 stored in the storage unit 34 is updated.

  When the determination unit 314 receives the request message from the specific vehicle 5A in step S1 of FIG. 7, based on the position of the specific vehicle 5A that transmitted the request message, the determination unit 314 at least the area EA (peripheral area) of FIG. Area) and area EC (non-peripheral area) are set. Preferably, the determination unit 314 further sets an area EB (an area in the vicinity of a peripheral area among non-peripheral areas).

  When each area is set by the determination unit 314, the generation unit 312 updates the dynamic information for each area at a cycle corresponding to the area using the sensor value from the sensor existing in the area.

  That is, the generation unit 312 generates dynamic information (second dynamic information) in the high cycle mode using the sensor value from the sensor existing in the area EA. In addition, the generation unit 312 generates dynamic information (first dynamic information) in the normal mode using sensor values from sensors present in the area EC. When the area EB is set, the generation unit 312 generates dynamic information (third dynamic information) in the medium cycle mode using the sensor value from the sensor existing in the area EB.

  The output unit 313 is generated in the normal mode in a state where the area is not set by the determination unit 314, that is, immediately after receiving the request message from the specific vehicle 5A in step S1 in the example of FIG. The communication unit 35 is controlled so as to transmit the stored dynamic information (first dynamic information) to the specific vehicle 5.

  After the area is set by the determination unit 314, the output unit 313, the output unit 313, the dynamic information generated in the normal mode by the generation unit 312 (first dynamic information), the dynamic generated in the high cycle mode The communication unit transmits the information (second dynamic information) and the dynamic information generated in the medium cycle mode (third dynamic information) to the specific vehicle 5A at a timing when each dynamic information is updated. 35 is controlled.

[Operation flow]
FIG. 11 is a flowchart illustrating an example of update processing in the edge server 3. In the processing shown in the flowchart of FIG. 11, the CPU of the control unit 31 of the edge server 3 reads out and executes one or more programs stored in the ROM 32 to the RAM 33, and the CPU mainly performs each function of FIG. 8. Realized by demonstrating. Hereinafter, the process illustrated in FIG. 11 will be described along with an example in which a request message is transmitted from the specific vehicle 5A as illustrated in FIG. Note that step S107 in FIG. 11 will be described in the second embodiment, and the processing according to the first embodiment does not include step S107.

  Referring to FIG. 11, when receiving a request message from specific vehicle 5A (YES in step S101), control unit 31 of edge server 3 performs the following operations.

  The control unit 31 analyzes the request message to identify the position of the specific vehicle 5A (step S103), and sets a peripheral area and a non-peripheral area of the specific vehicle 5A according to the position of the specific vehicle 5A. (Step S105). That is, the area EA in FIG. 9 and at least the area EC are determined.

  When the above area is determined in step S105, the control unit 31 uses the sensor values from the sensors existing in the peripheral area of the specific vehicle 5A (area EA in FIG. 9) to perform dynamic information (second Dynamic information) is generated (step S109).

  Moreover, the control part 31 produces | generates dynamic information (1st dynamic information) with a normal period using the sensor value from the sensor which exists in a non-periphery area (area EC of FIG. 9) (step S111). Moreover, when the area (area EB in FIG. 9) in the vicinity of the peripheral area among the non-peripheral areas of the specific vehicle 5A is set in step S105, the control unit 31 calculates the sensor value from the sensor existing in the area EB. Use to generate dynamic information (third dynamic information) in a medium cycle.

  The generated dynamic information is delivered to the specific vehicle 5A at the generated timing. Thereby, in the vehicle 5A, the dynamic information is updated at a normal cycle, that is, at a relatively long interval in the area EA away from the specific vehicle 5A, whereas the area EC in the vicinity of the specific vehicle 5A is changed from the normal cycle. The dynamic information is updated at a short high cycle, that is, at short intervals.

  When the request message is not transmitted from the specific vehicle 5A (NO in step S101), the control unit 31 does not perform a series of subsequent operations. In this case, the control unit 31 repeats the operation of generating dynamic information in the normal mode and storing it in the storage unit 34 (step S111). Thereby, although not distributed to the specific vehicle 5A, the dynamic information of the entire service area is updated and stored in the edge server 3 at a normal cycle, that is, at a relatively long interval. Therefore, dynamic information can be provided promptly when a request message is received from the specific vehicle 5A.

[Effect of the first embodiment]
In the present embodiment, when receiving the dynamic information request message from the specific vehicle 5A, the edge server 3 updates (generates) the dynamic information of the stored map M1 for the peripheral area of the specific vehicle 5A. The dynamic information is updated at a cycle (high cycle) shorter than the cycle (normal cycle) and distributed to the specific vehicle 5A. For example, as shown in FIG. 9, the peripheral area of the specific vehicle 5 </ b> A is a range such as the front of the specific vehicle 5 </ b> A in the traveling direction or the east-west direction of the intersection CP <b> 1 ahead. The shorter the update cycle, the better the real-time performance of the distributed dynamic information. Therefore, the user of the specific vehicle 5A can obtain information useful for a positional relationship with a vehicle or the like ahead in the traveling direction, an encounter collision at the intersection CP1, and the like.

  The update period for the peripheral area of the specific vehicle 5A may be determined according to a protocol for receiving a sensor value from a sensor existing in the area. For example, a short update cycle may be determined for an area where a sensor with high communication capability exists, and a long update cycle may be determined for an area where a sensor with low communication capability exists. By determining the update period in this way, the dynamic information is updated using the sensor values transmitted from the sensors existing in the area.

  On the other hand, the edge server 3 updates the dynamic information in a normal update cycle when there is no dynamic information request message from the specific vehicle 5A or for a non-peripheral area of the specific vehicle 5A. Therefore, the reduction in processing load on the edge server 3 and the usefulness of the distributed dynamic information are compatible.

  Further, the interval for updating the dynamic information is set to an interval (medium cycle) between the normal interval (normal cycle) and an interval shorter than the normal interval (high cycle) in addition to the two types of intervals. By setting the range, the processing load on the edge server 3 can be reduced more efficiently, and the usefulness of the distributed dynamic information can be further improved.

  Note that the processing load on the edge server 3 can be more efficiently reduced by determining the update cycle and limiting the vehicle 5 that distributes dynamic information to the specific vehicle 5A.

<Second Embodiment>
The communication method in the wireless communication system according to the present embodiment is not limited to 5G. That is, among the plurality of sensors included in the information providing system, communication capable of executing 5G communication (for example, 5G), LTE (Long Term Evolution), or 5G compatible communication such as 3G Those that execute low-speed, low-dose communication processing (non-5G) that is inferior to the capability may be mixed. It is assumed that a sensor that is non-5G does not have a communication capability of transmitting a sensor value within a high cycle interval. Therefore, in the information providing system according to the second embodiment, update processing is performed in consideration of the communication capability of the sensor.

  Referring to FIG. 11, in the information providing system according to the second embodiment, control unit 31 of edge server 3 sets an area according to the position of specific vehicle 5A that has received the request message (steps S101 to S101). S105), it is determined whether there is a sensor that executes non-5G communication processing in the peripheral area (area EA) of the specific vehicle 5A. That is, it is confirmed whether or not the area EA is completely included in the 5G communication range.

  When all the sensors existing in the peripheral area of the specific vehicle 5A can execute the 5G communication process (YES in step S107), the control unit 31 performs the same as the update process described in the first embodiment. Then, dynamic information (second dynamic information) is generated at a high cycle using the sensor values from the sensors existing in the peripheral area of the specific vehicle 5A (step S109).

  On the other hand, when there is a sensor that executes non-5G communication processing in the peripheral area of the specific vehicle 5A (NO in step S107), the control unit 31 is dynamic even if the area EA in FIG. 9 is set. Information is not updated in a high cycle, but is updated in a normal cycle (step S111).

[Effect of the second embodiment]
In this embodiment, when the sensor in the peripheral area of the specific vehicle 5A that has received the request message does not have the communication capability (for example, 5G) corresponding to the update process in the high cycle, the dynamic information of the area The update cycle is maintained at the normal cycle. In this case, the edge server 3 updates (generates) dynamic information in an ordinary cycle even for an area close to the specific vehicle 5A, and distributes the dynamic information to the vehicle 5 or the like.

  In the present embodiment, when the specific vehicle 5A moves (enters) into an area where a sensor having 5G communication capability exists, the edge server 3 uses the sensor values from the sensors existing in the peripheral area of the specific vehicle 5A. The dynamic information is updated at a high cycle shorter than the normal cycle and distributed to the specific vehicle 5A.

  Thereby, even if the sensor which is not made into the sensor corresponding to 5G is mixed in an information provision system, the usefulness of the dynamic information delivered can be made compatible.

<Third Embodiment>
The start of the update process in the edge server 3 is not limited to receiving a request message from the specific vehicle 5A. As another example, in the third embodiment, when the edge server 3 detects that the specific vehicle 5A has entered an area (5G area) where a sensor having 5G communication capability exists, the sensor of the 5G area The dynamic information is updated at a high cycle using the sensor value from and is distributed to the specific vehicle 5A.

  The control unit 31 of the edge server 3 according to the third embodiment uses the sensor value from each sensor in the service area without waiting for the reception of the request request from the specific vehicle 5A in the update process of FIG. Based on this, the position of the specific vehicle 5A existing in the service area is specified (step S103). When there is a specific vehicle 5A existing in the 5G area (YES in step S107), the control unit 31 updates and distributes the dynamic information of the 5G area at a high cycle to the specific vehicle 5A.

  Thereby, useful dynamic information can be generated even when sensors that are not 5G compatible sensors are mixed in the information providing system.

<Fourth embodiment>
In the information providing system according to the fourth embodiment, the dynamic information distributed from the edge server 3 to the specific vehicle 5A is dynamic information (first dynamic information) generated in the normal mode, or high The dynamic information generated in the periodic mode (second dynamic information), the dynamic information generated in the medium cycle mode (third dynamic information), or the dynamic information generation mode Contains identifying information. When the generation unit 312 of the edge server 3 generates dynamic information, it includes identification information for specifying a generation mode in the dynamic information.

  In the specific vehicle 5 </ b> A, the distributed dynamic information is used for driving assistance of the passenger. By including the information specifying the generation mode in the distributed dynamic information, it is possible to vary the utilization method in driving support according to the generation mode. Since the real-time property of the dynamic information is different between the first dynamic information and the second dynamic information, it is possible to realize a utilization method in driving support according to the real-time property.

  As another example, in addition to the dynamic information from the edge server 3, a map M1 generated by superimposing the dynamic information on the static information may be distributed to the specific vehicle 5A. In this case, the generation unit 312 of the edge server 3 generates a region in which the first dynamic information in the map M1 is superimposed and a region in which the second dynamic information is superimposed so as to have different display modes. Different display modes include, for example, changing the display color, changing the transparency, and changing the display size of the object. Thereby, in the specific vehicle 5A to which the map M1 is distributed, when the map is displayed using the map M1, the area where the first dynamic information is superimposed is different from the area where the second dynamic information is superimposed. It becomes an aspect. As a result, it becomes easy for the user to visually recognize that the real-time property is different.

  The disclosed features are realized by one or more modules. For example, the feature can be realized by a circuit element or other hardware module, by a software module that defines processing for realizing the feature, or by a combination of a hardware module and a software module.

  It can also be provided as a program that is a combination of one or more software modules for causing a computer to execute the above-described operation. Such a program is recorded on a computer-readable recording medium such as a flexible disk attached to the computer, a CD-ROM (Compact Disk-Read Only Memory), a ROM, a RAM, and a memory card, and provided as a program product. You can also. Alternatively, the program can be provided by being recorded on a recording medium such as a hard disk built in the computer. A program can also be provided by downloading via a network.

  The program according to the present disclosure is a program module that is provided as a part of a computer operating system (OS) and calls necessary modules in a predetermined arrangement at a predetermined timing to execute processing. Also good. In that case, the program itself does not include the module, and the process is executed in cooperation with the OS. Such a program that does not include a module may also be included in the program according to the present disclosure.

  Further, the program according to the present disclosure may be provided by being incorporated in a part of another program. Even in this case, the program itself does not include the module included in the other program, and the process is executed in cooperation with the other program. A program incorporated in such another program may also be included in the program according to the present disclosure. The provided program product is installed in a program storage unit such as a hard disk and executed. The program product includes the program itself and a recording medium on which the program is recorded.

  The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

DESCRIPTION OF SYMBOLS 1,1A-1D Communication terminal 2 Base station 3 Edge server 4 Core server 5 Vehicle 5A Specific vehicle 7 Pedestrian 8 Roadside sensor 9 Traffic signal controller 31 Control part 32 ROM
33 RAM
34 storage unit 35 communication unit 41 control unit 42 ROM
43 RAM
44 storage unit 45 communication unit 50 in-vehicle device 51 control unit 52 receiver 53 vehicle speed sensor 54 gyro sensor 55 storage unit 56 display 57 speaker 58 input device 59 in-vehicle camera 60 radar sensor 61 communication unit 70 pedestrian terminal 71 control unit 72 storage unit 73 display unit 74 operation unit 75 communication unit 81 control unit 82 storage unit 83 roadside camera 84 radar sensor 85 communication unit 311 input unit 312 generation unit 313 output unit 314 determination unit C1 to C4 data communication amount CP1 to CP5 intersection D1 to D4 delay Time DI11-DI13, DI21-DI25, DI31-DI39 Dynamic information EA, EB, EC area R1-R5 Road S1-S4 Network slice SA1-SA9, SB1-SB8, SC1-SC7 Sensor value M1, M2 map N1 ~ N4 Node N

Claims (10)

An input unit for receiving sensor value input from the sensor;
A generating unit that generates first dynamic information in a first period using the input sensor value;
When the specific vehicle exists, the generation unit uses the sensor value from the sensor existing in the peripheral area of the specific vehicle to generate the second dynamic information in a second cycle shorter than the first cycle. An information providing device to be generated. A storage unit for storing identification information of the specific vehicle;
The information providing apparatus according to claim 1, wherein the generation unit generates the second dynamic information using a vehicle whose identification information matches the identification information stored in the storage unit as the specific vehicle. The second cycle includes a plurality of types of cycles according to the distance between the specific vehicle and the sensor,
The said generation part produces | generates said 2nd dynamic information with the period according to the distance with the said specific vehicle using the sensor value from the said sensor about the sensor which exists in the said surrounding area. Item 3. The information providing apparatus according to Item 2.   The said production | generation part further superimposes the produced | generated said 1st dynamic information and said 2nd dynamic information on map information, and produces | generates the display information of a map in any one of Claims 1-3. The information providing apparatus according to item 1.   The information providing apparatus according to claim 4, wherein the generation unit changes a display mode of an area on which the first dynamic information is superimposed and an area on which the second dynamic information is superimposed on the map.   The information providing apparatus according to claim 1, further comprising a determination unit that determines the second period according to a communication capability of a sensor existing in the peripheral area.   The information providing apparatus according to claim 1, wherein the generation unit generates the second dynamic information in response to a request from the specific vehicle.   The said production | generation part produces | generates a said 2nd dynamic information, if it detects that the said specific vehicle entered into the range where the sensor of the communication capability corresponding to the said 2nd period exists. Item 7. The information providing apparatus according to any one of Items 6 above. A method for providing dynamic information to a vehicle,
Inputting a sensor value from the sensor;
Generating first dynamic information in a first period using the input sensor value;
Generating a second dynamic information in a second period shorter than the first period using a sensor value from a sensor present in a peripheral area of the specific vehicle when the specific vehicle exists; An information providing method comprising: A computer program for causing a computer to function as an information providing device for providing dynamic information to a vehicle,
The computer,
An input unit for receiving sensor value input from the sensor; and
Function as a generation unit that generates first dynamic information in a first period using the input sensor value;
When the specific vehicle exists, the generation unit uses the sensor value from the sensor existing in the peripheral area of the specific vehicle to generate the second dynamic information in a second cycle shorter than the first cycle. A computer program to generate.

Images