WO2023162650A1 - Dispositif de commande monté sur véhicule, système de commande monté sur véhicule, procédé de commande et programme informatique - Google Patents

Dispositif de commande monté sur véhicule, système de commande monté sur véhicule, procédé de commande et programme informatique Download PDF

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Publication number
WO2023162650A1
WO2023162650A1 PCT/JP2023/003802 JP2023003802W WO2023162650A1 WO 2023162650 A1 WO2023162650 A1 WO 2023162650A1 JP 2023003802 W JP2023003802 W JP 2023003802W WO 2023162650 A1 WO2023162650 A1 WO 2023162650A1
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Prior art keywords
vehicle
data
section
control
communication
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PCT/JP2023/003802
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English (en)
Japanese (ja)
Inventor
紀博 尾野
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株式会社オートネットワーク技術研究所
住友電装株式会社
住友電気工業株式会社
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Publication of WO2023162650A1 publication Critical patent/WO2023162650A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L12/00—Data switching networks
    • H04L12/28—Data switching networks characterised by path configuration, e.g. LAN [Local Area Networks] or WAN [Wide Area Networks]

Definitions

  • the present disclosure relates to an in-vehicle control device, an in-vehicle control system, a control method, and a computer program.
  • This application claims priority based on Japanese application No. 2022-25567 filed on February 22, 2022, and incorporates all the descriptions described in the Japanese application.
  • a technology is known that transmits vehicle-related data collected by an in-vehicle control device to an external device provided outside the vehicle.
  • an in-vehicle communication device transmits imaging information (information acquired by an imaging device such as a drive recorder) and vehicle information (information such as the position of the vehicle, the traveling speed of the vehicle, and the amount of brake depression).
  • imaging information information acquired by an imaging device such as a drive recorder
  • vehicle information information such as the position of the vehicle, the traveling speed of the vehicle, and the amount of brake depression.
  • An in-vehicle control device is an in-vehicle control device mounted in a vehicle, outputs data collected in the vehicle to a communication device mounted in the vehicle, and transmits data from the communication device to the outside of the vehicle.
  • a control unit for transmitting the data to an external device provided via a network, wherein the control unit sends the data to the external device according to a first condition in chronological order while the vehicle travels in the first section; while the vehicle travels in a second section in which the communication status between the network and the communication device is more unfavorable than in the first section, the data is transmitted per unit time more than the first condition; a second control for transmitting to the external device in chronological order under a second condition that the amount of data to be transmitted to the device is small; and a third control for transmitting remaining data not transmitted in the control to the external device, wherein the third control collects the remaining data while the vehicle travels a predetermined section.
  • the in-vehicle control device includes priority control for transmitting first data before second data
  • a control method of the present disclosure is a control method for controlling an in-vehicle control device mounted in a vehicle, wherein data collected in the vehicle is output to a communication device mounted in the vehicle, and the a transmitting step of transmitting the data to an external device provided outside the vehicle via a network; a first step of transmitting data to a device in chronological order; a second step of transmitting in chronological order to the external device under a second condition that the amount of data transmitted per unit time is small; and after the second step, while the vehicle travels in the first section and a third step of transmitting remaining data not transmitted in the second step to the external device, wherein the third step transmits the remaining data while the vehicle travels a predetermined section. a priority step of transmitting first data collected during the period before transmission of second data collected while the vehicle travels outside the predetermined section.
  • a computer program of the present disclosure is a computer program for controlling an in-vehicle control device mounted in a vehicle, wherein the computer program causes a computer to transmit data collected in the vehicle to communication mounted in the vehicle. outputting the data to a device and transmitting the data from the communication device to an external device provided outside the vehicle via a network, wherein the transmission step is performed while the vehicle travels a first section.
  • the computer program includes a priority step of transmitting first data collected while the vehicle travels in a predetermined section before transmitting second data collected while the vehicle travels outside the predetermined section. be.
  • FIG. 1 is a schematic diagram illustrating an in-vehicle control system according to an embodiment.
  • FIG. 2 is a flow chart illustrating a control method according to an embodiment.
  • FIG. 3 is a schematic diagram explaining a control method according to the embodiment.
  • FIG. 4 is a schematic diagram illustrating a control method according to a modification.
  • the present disclosure has been made in view of such circumstances, and aims to solve the lack of data in the external device while maintaining the real-time nature of the data transmitted from the vehicle-mounted control device to the external device.
  • An in-vehicle control device of the present disclosure is an in-vehicle control device mounted on a vehicle, which outputs data collected by the vehicle to a communication device mounted on the vehicle, and outputs data collected by the vehicle to a communication device mounted on the vehicle.
  • a control unit configured to transmit the data to an external device provided outside the vehicle via a network, wherein the control unit transmits the data to the external device under a first condition while the vehicle travels in the first section while the vehicle travels in a second section in which the communication status between the network and the communication device is more unfavorable than the first section, the data is transmitted in chronological order from the first condition.
  • the in-vehicle control device includes priority control for transmitting the first data collected during the period before the second data collected while the vehicle travels outside the predetermined section.
  • the predetermined section includes a section registered as an area where vehicle accidents frequently occur in the external device or the vehicle-mounted control device, a section including intersections, tunnels, bridges or railroad crossings, and a road whose radius of curvature exceeds a predetermined curvature. and at least one of the intervals exceeding
  • a predetermined section is a section in which there is a high need for more detailed data analysis in an external device. By preferentially transmitting the data collected in the predetermined section to the external device when the communication status recovers, the shortage of data in the external device can be resolved more quickly.
  • the first section may include a third section in which the communication status is more suitable than the first indicator, and the control unit performs the first control and The third control may be executed, and the first control may be executed without executing the third control while the vehicle travels in the first section that is not the third section.
  • the first section may be a section in which the communication speed between the communication device and the network exceeds the first speed
  • the second section may be a section in which the communication speed is lower than the first speed
  • the third section may be a section in which the communication speed exceeds a second speed higher than the first speed.
  • the first section may be a section in which the strength of radio waves reaching the communication device from the network exceeds the first strength
  • the second section may be a section in which the strength of the radio waves is less than the first strength
  • the third section may be a section in which the radio wave intensity exceeds a second intensity that is stronger than the first intensity
  • the signal strength has a relationship that is linked to the communication speed. Based on other values that affect the communication speed in this way, it may be determined whether or not the communication status in the section in which the vehicle is running hinders real-time transmission.
  • the first section may be a section in which the distance between the vehicle and a base station closest to the vehicle among a plurality of base stations included in the network is less than the first distance.
  • the second section may be a section in which the distance exceeds the first distance, and the third section may be a section in which the distance is less than the second distance, which is shorter than the first distance.
  • the distance between the base station and the vehicle is linked with the communication speed. Based on other values that affect the communication speed in this way, it may be determined whether or not the communication status in the section in which the vehicle is running hinders real-time transmission.
  • the first condition may include setting a transmission interval of the data to a first interval, and the second condition thins the data so that the transmission interval is longer than the first interval.
  • a second interval may be included.
  • the amount of data to be transmitted can be reduced without editing the data content, so the processing load on the control unit can be reduced.
  • the reduced data can be transmitted to the external device as it is, thereby complementing the data, so that the processing load on the external device can be reduced.
  • the data may include video data
  • the first condition may include setting the frame rate of the data to a predetermined rate or higher
  • the second condition may include setting the frame rate to less than the predetermined rate.
  • the data may include image data
  • the first condition may include setting the number of pixels of the data to a predetermined number of pixels or more
  • the second condition may include setting the number of pixels to the predetermined number of pixels. may include less than a number.
  • An in-vehicle control system of the present disclosure is an in-vehicle control system including the in-vehicle control device according to any one of (1) to (9) above and the communication device.
  • the communication device may communicate with the external device via the network by a mobile communication system of a predetermined generation.
  • the communication situation may deteriorate depending on the vehicle's driving position.
  • the amount of data to be transmitted to the external device is temporarily reduced, and when the communication situation recovers after that, priority is given to data with higher importance among the reduced data. Since the data is transmitted to the external device in a timely manner, even if the communication situation deteriorates as the vehicle runs, it is possible to solve the shortage of data in the external device while maintaining real-time data transmission.
  • the communication device may include a first communication device fixed to the vehicle and a second communication device carried by a passenger of the vehicle, wherein the first communication device
  • the data received from the in-vehicle control device may be transmitted to the second communication device by a short-distance communication method having a radio wave range shorter than that of the mobile communication system, wherein the second communication device receives the data from the first communication device.
  • the data received from the device may be transmitted by the mobile communication system through the network to the external device.
  • a control method of the present disclosure is a control method for controlling an in-vehicle control device mounted in a vehicle, wherein data collected in the vehicle is output to a communication device mounted in the vehicle, and the communication a transmission step of transmitting the data from the device to an external device provided outside the vehicle via a network, wherein the transmission step transmits the data under a first condition while the vehicle travels in the first section; a first step of transmitting the data to the external device in chronological order by the method; and transmitting the data to the external device while the vehicle travels in a second section in which the communication status between the network and the communication device is more unfavorable than the first section.
  • the control method includes a priority step of transmitting first data collected while the vehicle is traveling before transmitting second data collected while the vehicle is traveling outside the predetermined section.
  • a computer program of the present disclosure is a computer program for controlling an in-vehicle control device installed in a vehicle, the computer program causing a computer to store data collected in the vehicle and installed in the vehicle. outputting the data to a communication device provided outside the vehicle, and transmitting the data from the communication device to an external device provided outside the vehicle via a network; a first step of transmitting the data to the external device in chronological order under a first condition; a second step of transmitting the data to the external device in chronological order under a second condition that the amount of data transmitted per unit time is smaller than that of the first condition while the vehicle is running; and a third step of transmitting remaining data not transmitted in the second step to the external device while the vehicle travels the first section, wherein the third step comprises the remaining Among the data, the first data collected while the vehicle travels in the predetermined section is transmitted before the second data collected while the vehicle travels outside the predetermined section.
  • FIG. 1 is a schematic diagram illustrating an in-vehicle control system 1 according to an embodiment.
  • the in-vehicle control system 1 is a system installed in the vehicle V1 and is a system that transmits data D collected in the vehicle V1 to the external device 70 .
  • the in-vehicle control system 1 includes an in-vehicle control device 10 , a communication device 20 , one or more ECUs 30 , and a sensor 40 .
  • the vehicle V1 is, for example, an automobile, but the type of the vehicle V1 is not particularly limited.
  • the vehicle V1 may be an automobile using an engine such as a gasoline engine or a diesel engine as a power source, an automobile using an electric motor as a power source, or a hybrid type vehicle combining these power sources. It may be an automobile.
  • the in-vehicle control device 10 is a device mounted on the vehicle V1, and is also called an ECU (Electronic Control Unit).
  • the in-vehicle control device 10 includes a control section 11 , a storage section 12 , an input/output section 13 and a reading section 14 . These units 11 to 14 are electrically connected by a bus 15 .
  • the control unit 11 includes a circuit configuration such as a processor, for example.
  • the control unit 11 specifically includes one or more CPUs (Central Processing Units).
  • the processor included in the control unit 11 may be a GPU (Graphics Processing Unit).
  • the control unit 11 reads computer programs stored in the storage unit 12 and executes various calculations and controls.
  • the control unit 11 may include a processor in which a predetermined program is written in advance.
  • the control unit 11 may be an integrated circuit such as CPLD (Complex Programmable Logic Device), FPGA (Field-Programmable Gate Array), or ASIC (Application Specific Integrated Circuit). In this case, the control unit 11 executes various calculations and controls based on prewritten programs.
  • the storage unit 12 has a volatile memory and a nonvolatile memory, and stores various data.
  • Volatile memory includes, for example, RAM (Random Access Memory).
  • the non-volatile memory includes, for example, flash memory, HDD (Hard Disk Drive), SSD (Solid State Drive), ROM (Read Only Memory), and the like.
  • the storage unit 12 stores computer programs and various parameters in, for example, a non-volatile memory.
  • the input/output unit 13 is connected to the communication device 20, the ECU 30, and the sensor 40 via communication lines 13a, 13b, and 13c.
  • the input/output unit 13 converts various types of information input from the communication lines 13a, 13b, and 13c into signals readable by a computer such as the control unit 11, and loads the signals into the in-vehicle control device 10.
  • FIG. Various kinds of information taken into the in-vehicle control device 10 are stored in the storage unit 12, for example.
  • the reading unit 14 reads information from a computer-readable recording medium 16 .
  • the recording medium 16 is, for example, an optical disc such as a CD or DVD, or a USB flash memory.
  • the reading unit 14 is, for example, an optical drive or a USB terminal.
  • a computer program and various parameters are recorded in the recording medium 16 , and the computer program and various parameters are stored in the non-volatile memory of the storage section 12 by causing the reading section 14 to read the recording medium 16 .
  • the computer program may be transmitted from the external device 70 and stored in the storage section 12 via the communication device 20 and the input/output section 13 .
  • the communication device 20 is a device that performs wireless communication with the external device 70 via the network N1.
  • Network N1 is a telecommunications network such as the Internet, and includes a plurality of base stations.
  • the communication device 20 communicates with the base station of the network N1 by the communication system 91 for mobile.
  • the external device 70 is a device provided outside the vehicle V1.
  • the external device 70 is installed, for example, in a facility managed by a service provider who provides various services (eg, road guidance service, driving support service, etc.) to the vehicle V1.
  • the external device 70 is, for example, a server that includes a control unit, a storage unit, and a communication unit (all not shown).
  • the external device 70 communicates with the plurality of vehicles V1 via the network N1, for example, and stores the data D transmitted from each of the plurality of vehicles V1 to the external device 70 in the storage unit of the external device 70 . Based on the data D, the external device 70 performs various types of analysis (for example, determination of traffic conditions, abnormality of the vehicle V1, etc.).
  • the communication device 20 includes a first communication device 21 and a second communication device 22.
  • the first communication device 21 is a device fixed to the vehicle V1, such as a TCU (Telematics Communication Unit).
  • the first communication device 21 is connected to the in-vehicle control device 10 via a communication line 13a.
  • the second communication device 22 is a device carried by the passenger of the vehicle V1, such as a smartphone, tablet, notebook computer, or router.
  • the second communication device 22 may be carried out of the vehicle V1, but the control method described later is executed while the second communication device 22 is mounted on the vehicle V1.
  • the first communication device 21 transmits the data D output from the input/output unit 13 of the in-vehicle control device 10 to the external device 70 through the first route or the second route.
  • a first route is a route for transmitting data D directly from the first communication device 21 to the external device 70 via the network N1.
  • the first communication device 21 communicates with the base station of the network N1 using the mobile communication method 91 .
  • the second route transmits data D from the first communication device 21 to the second communication device 22 using the short-range communication method 92, and transmits data D from the second communication device 22 to the external device 70 via the network N1. Root.
  • the second communication device 22 communicates with the base station of the network N1 using the mobile communication method 91 .
  • the first communication device 21 may transmit the data D to the external device 70 only through the first route.
  • the communication device 20 may not include the second communication device 22 .
  • the mobile communication system 91 is, for example, 3G (third generation mobile communication system), 4G/LTE (fourth generation mobile communication system/Long Term Evolution, LTE is a registered trademark), or 5G (fifth generation mobile communication system). is a communication system by a mobile communication system of a predetermined generation.
  • the short-distance communication method 92 is, for example, a wireless LAN (Local Area Network) such as Wi-Fi (registered trademark).
  • the short-distance communication method 92 may be a communication method such as ZigBee (registered trademark) or Bluetooth (registered trademark).
  • the range of radio waves emitted from the antenna of the communication device 20 using the short-distance communication method 92 is, for example, within 100 m, which is shorter than the range of radio waves emitted when using the mobile communication method 91 .
  • the ECU 30 is, for example, a device that collects operation records (logs) of each part of the vehicle V1.
  • the ECU 30 collects communication logs flowing through the communication line 13b or the like in time series, and sequentially outputs the collected communication logs to the in-vehicle control device 10 via the communication line 13b.
  • the communication log is configured in the vehicle V1 according to a communication protocol such as CAN (Controller Area Network), CAN-FD (CAN with Flexible Data Rate), LIN (Local Interconnect Network), or Ethernet (registered trademark).
  • CAN Controller Area Network
  • CAN-FD CAN with Flexible Data Rate
  • LIN Local Interconnect Network
  • Ethernet registered trademark
  • the ECU 30 may be a device (operation system ECU) that controls actuators (for example, a braking device, a door opening/closing mechanism, an air conditioner, etc.) mounted on the vehicle V1.
  • actuators for example, a braking device, a door opening/closing mechanism, an air conditioner, etc.
  • the ECU 30 collects control logs of the actuators in time series and sequentially outputs the collected control logs to the in-vehicle control device 10 via the communication line 13b.
  • the control log may include, for example, the traveling speed of the vehicle V1, and may include the amount of depression of the brake pedal in the vehicle V1.
  • the sensor 40 is a device that detects the state of the vehicle V1 itself or the state of the interior and exterior of the vehicle V1 and outputs the detected time-series information to the in-vehicle control device 10 .
  • sensor 40 is a drive recorder that collects video logs outside or inside vehicle V1.
  • the video log may include audio outside or inside vehicle V1.
  • the sensor 40 collects video logs in chronological order and sequentially outputs the collected video logs to the in-vehicle control device 10 via the communication line 13c.
  • the sensor 40 may be, for example, a LiDAR (Light Detection and Ranging) for monitoring the surroundings of the vehicle V1. Also in this case, the sensor 40 records information in time series and sequentially outputs the recorded information to the vehicle-mounted controller 10 via the communication line 13c.
  • LiDAR Light Detection and Ranging
  • the sensor 40 is directly connected to the input/output unit 13 by the communication line 13c.
  • the specific mode is not particularly limited.
  • the control unit 11 transmits data D to the external device 70 based on various types of information (communication log, control log, and video log) that are taken into the in-vehicle control device 10 from the input/output unit 13 and stored in the storage unit 12. to create
  • the data D may be the various information itself, or may be data obtained by subjecting the various information to predetermined processing (for example, compression).
  • the control unit 11 outputs the data D from the input/output unit 13 to the communication device 20, and causes the communication device 20 to transmit the data D to the external device 70 via the network N1.
  • the storage unit of the external device 70 stores the received data D. FIG. Thereby, the data D collected by the in-vehicle control device 10 can be accumulated in the external device 70 .
  • the in-vehicle control device 10 receives various types of information from the input/output unit 13, and based on the information, transmits the data D to the external device 70 in rapid succession.
  • the in-vehicle control device 10 can transmit the data D to the external device 70 in real time.
  • the communication situation may deteriorate.
  • the communication speed between the in-vehicle control device 10 and the external device 70 may decrease, and the transmission of the data D from the in-vehicle control device 10 to the external device 70 may be delayed.
  • the communication capacity by thinning out the data D to be transmitted according to the amount of decrease in the communication speed.
  • the data D is a video log
  • the volume of the data D to be transmitted is reduced by lowering the image quality of the video or reducing the frame rate.
  • the external device 70 may not be able to perform good data analysis due to lack of data.
  • the external device 70 analyzes based on the data D transmitted in real time, it may be possible to quickly detect a vehicle that is traveling abnormally (for example, traveling in the wrong direction). In this case, there is a risk that the license plate of the vehicle cannot be analyzed satisfactorily due to deterioration in image quality, etc., resulting in an insufficient analysis result.
  • the in-vehicle control device 10 of the present embodiment maintains real-time transmission by temporarily reducing the capacity of the data D to be transmitted to the external device 70 when the communication situation deteriorates, and then changes the communication situation. is recovered, the data shortage in the external device 70 is resolved by preferentially transmitting to the external device 70 the data of high importance among the reduced data D.
  • FIG. 2 is a flow chart illustrating a control method according to an embodiment.
  • FIG. 2 shows various controls executed by the control unit 11 . These controls are realized by the control unit 11 reading a computer program from the storage unit 12 (or according to a program pre-written in the control unit 11) and executing various calculations and processes. The steps shown in FIG. 2 may be changed in order as appropriate.
  • FIG. 3 is a schematic diagram explaining the control method according to the embodiment.
  • the horizontal axis indicates time and sections T1 to T6 through which the vehicle V1 passes for each time.
  • the vehicle V1 passes through the sections T1 to T6 in this order, for example, as shown in order from (a) to (f) in FIG.
  • the in-vehicle control device 10 transmits the collected data D to the external device 70 in real time.
  • the in-vehicle control device 10 divides the data D into a plurality of divided data D1 to D24 while passing through the sections T1 to T6, and sends the divided data D1 to D24 to the external device 70 in chronological order. Transmit via the communication device 20 .
  • the in-vehicle control device 10 (or the control unit 11) transmitting the data D to the external device 70 via the communication device 20, the phrase “via the communication device 20” will be omitted as appropriate. explain.
  • the divided data D1 to D24 are stored in the storage unit 12 as separate files for each data capacity (or each time), for example.
  • data D acquired between 10:00 and 10:05 is stored in the storage unit 12 as divided data D1 (file D1)
  • data D acquired between 10:05 and 10:10 is divided. It is stored in the storage unit 12 as data D2 (file D2).
  • each of the sections T1 to T6 includes four pieces of divided data D1 to D24.
  • the control unit 11 determines whether or not the vehicle V1 is running (step S10). For example, the control unit 11 determines whether or not the ignition switch of the vehicle V1 is on. If the ignition switch is off (NO in step S10), the vehicle V1 is parked, so there is little need to transmit the data D to the external device 70 in real time. Therefore, in this case, the control unit 11 does not execute each step described later. If it is necessary to transmit the data D to the external device 70 in real time even while the vehicle V1 is parked (for example, if the sensor 40 monitors the parked vehicle V1 for crime prevention or the like), step S10 is omitted. Then, the process may be started from the next step S11.
  • step S10 When the ignition switch of the vehicle V1 is on (YES in step S10), the control unit 11 determines whether the section in which the vehicle V1 is traveling is the first section A1 or the second section A2. Control is executed (step S11). When determining in the determination control that the section in which the vehicle V1 is traveling is the first section A1, the control unit 11 may further determine whether or not the section corresponds to the third section A3.
  • the second section A2 is a section in which the communication status between the communication device 20 and the network N1 is less suitable than the first section A1. That is, the first section A1 is a section in which the communication situation does not hinder normal real-time transmission of the data D from the communication device 20 to the external device 70, and the second section A2 is a section in which the communication situation is higher than that in the first section A1. Since there is a possibility that a delay may occur if this real-time transmission is performed, measures such as reducing the data amount of the data D are required in this section.
  • the third section A3 is a section included in the first section A1, and is a section in which the communication status between the communication device 20 and the network N1 is more suitable than the first index. That is, in the third section A3 of the first section A1, the data D can be normally transmitted from the communication device 20 to the external device 70 in real time, and there is an excess amount of data that can be transmitted (i.e., transmission It is a section with spare capacity).
  • the control unit 11 determines whether the section in which the vehicle V1 is traveling is the first section A1 or the second section A2 based on the communication speed between the communication device 20 and the network N1. do. In this case, the control unit 11 determines that the communication speed is the first section A1 when the communication speed is equal to or higher than the first speed V1 (for example, 10 Mbps), and determines that the communication speed is the second section A2 when the communication speed is less than the first speed V1. Determine that there is. Furthermore, the control unit 11 determines that it is the third section A3 when the communication speed is equal to or higher than a second speed V2 (for example, 20 Mbps) faster than the first speed V1. In this case, the second speed V2 corresponds to the above first index.
  • the first speed V1 and the second speed V2 may be fixed values stored as parameters in advance in the storage unit 12, or may be variable values calculated by the control unit 11 each time according to the amount of data D to be transmitted. may be The controller 11 may set the first speed V1 and the second speed V2 to higher values as the amount of data D per unit time increases. Further, the control unit 11 may set the first speed V1 and the second speed V2 to lower values as the capacity of the data D per unit time is smaller.
  • control unit 11 determines whether the traveling section of the vehicle V1 is the first section A1 or the second section A2, not based directly on the communication speed but based on other values that affect the communication speed. may be determined.
  • the "other value" may be, for example, the intensity of radio waves reaching the communication device 20 from the network N1, the distance between the base station included in the network N1 and the vehicle V1, or the distance of the vehicle V1. It may be in the running position.
  • the communication device 20 outputs information about the radio wave intensity received from the network N1 (specifically, the base station) to the in-vehicle control device 10 at any time.
  • the stronger the radio wave intensity the faster the communication speed.
  • the control unit 11 determines that the vehicle V1 is traveling in the first section A1 when the radio wave intensity is equal to or greater than the first intensity X1, and determines that the radio wave intensity is less than the first intensity X1. Alternatively, it may be determined that the vehicle V1 is traveling in the second section A2.
  • the first intensity X1 is, for example, a value of -100 dBmW (decibel milliwatt) or more and less than -80 dBmW.
  • the control unit 11 may determine that the vehicle V1 is traveling in the third section A3 when the radio wave has a second intensity X2 or higher, which is stronger than the first intensity X1.
  • the second intensity X2 is, for example, a value of ⁇ 80 dBmW or higher. In this case, the second intensity X2 corresponds to the above first index.
  • the radio waves received from the network N1 As the “closest base station"
  • the distance between the closest base station and vehicle V1 has a relationship linked with the communication speed. Therefore, when the distance between the closest base station and the vehicle V1 is less than the first distance L1 (for example, 3 km), the control unit 11 determines that the vehicle V1 is traveling in the first section A1, If the distance is greater than or equal to the first distance L1, it may be determined that the vehicle V1 is traveling in the second section A2. In this case, the control unit 11 determines that the vehicle V1 is traveling in the third section A3 when the distance is less than a second distance L2 (for example, 1.5 km) shorter than the first distance L1. You may In this case, the second distance L2 corresponds to the above first index.
  • the first distance L1 for example, 3 km
  • the control unit 11 determines that the vehicle V1 is traveling in the second section A2 when the traveling position of the vehicle V1 falls within the troubled section Ax where communication troubles are likely to occur, and determines that the traveling position is outside the troubled section Ax. , it may be determined that the vehicle is traveling in the first section A1.
  • the faulty section Ax is generally a section in which radio waves are difficult to reach the vehicle V1, such as in a tunnel, in a mountainous area, or between high-rise buildings.
  • the failure section Ax may be a section in which the communication speed actually becomes lower than the first speed V1 as a result of the test vehicle traveling in advance. Information about the faulty section Ax is stored in advance as a parameter in the storage unit 12, for example.
  • step S11 When the determination control determines that the travel section in which the vehicle V1 travels is the second section A2 (YES in step S11), the control unit 11 controls the data D according to the second condition while traveling in the travel section. A second control for transmitting to the external device 70 in chronological order is executed (step S12), and the process returns to step S10.
  • the control unit 11 causes the travel section to travel.
  • the first control is executed to transmit the data D to the external device 70 in chronological order under the first condition (step S13).
  • the first condition is a transmission condition for data D during normal operation, and is not particularly limited.
  • the second condition is a condition that the amount of data D transmitted per unit time is smaller than that of the first condition. For example, if the first condition is to set the transmission interval of the data D to a predetermined first interval Y1, the second condition is to thin the data D so that the transmission interval of the data D is longer than the first interval Y1. and providing a second spacing Y2.
  • step S13 the control unit 11 determines whether or not there is remaining data WD (hereinafter referred to as "remaining data WD") that has not been transmitted in the previously executed second control (step S12). (Step S14). If there is remaining data WD (YES in step S14), the controller 11 proceeds to step S15, which will be described later. If there is no remaining data WD (NO in step S14), the controller 11 returns to step S10.
  • control unit 11 may execute step S11 periodically (for example, every 5 minutes) in addition to the timing shown in FIG.
  • the control unit 11 may forcibly execute step S11 during steps S12, S13, and the like.
  • the control unit 11 can check the communication status of the section in which the vehicle V1 is traveling at an appropriate timing, and execute control (for example, first control or second control) according to the communication status. can.
  • the sections T1, T4 to T6 are the first section A1, and particularly the sections T4, T6 are also the third section A3.
  • Sections T2 and T3 are the second section A2. That is, while the vehicle V1 is traveling in the section T1, the communication situation is normal, and then the communication situation worsens while traveling in the sections T2 and T3. communication status is maintained normally.
  • the control unit 11 executes determination control (step S11) to determine that the section T1 is the first section A1. .
  • the control unit 11 transmits the data D to the external device 70 via the communication device 20 according to the first condition (step S13). For example, the control unit 11 divides the data D collected in the interval T1 into four pieces of divided data D1 to D4, and divides the data D1 to D4 into four pieces of divided data D1 to D4. 70.
  • the data D may be collected in a state in which it has already been divided into the divided data D1 to D4. In this case, the control unit 11 does not need to divide the data D.
  • the divided data D5 to D24 described below may also be collected in the in-vehicle control device 10 in an already divided state.
  • step S14 the control unit 11 determines whether or not there is remaining data WD. Since the data D collected in the interval T1 are all transmitted to the external device 70 as divided data D1 to D4, there is no remaining data WD in FIG. 3(a). Therefore, the control unit 11 returns to step S10. Since the vehicle V1 is running, the controller 11 proceeds from step S10 to step S11.
  • step S11 determines whether the sections T2 and T3 are It is determined to be the second section A2.
  • the control unit 11 transmits the data D to the external device 70 via the communication device 20 according to the second condition (step S12).
  • the control unit 11 divides the data D collected in the intervals T2 and T3 into eight pieces of divided data D5 to D12, further thins out the divided data D5 to D12, and divides the divided data D5 to D12 into each second interval Y2. It transmits to the external device 70 in real time in chronological order. For example, the control unit 11 thins out the divided data D6, D8, D10 and D12 without transmitting them, and transmits the divided data D5, D7, D9 and D11. That is, in the example of FIG. 3, the divided data D5 to D12 are thinned out by half, and the second interval Y2 is twice the first interval Y1.
  • the control unit 11 may simply extract and transmit the divided data D5, D7, D9, and D11, so it is necessary to edit the contents of the divided data D5 to D12. There is no For example, there is no need to perform editing such as lowering the image quality of the divided data D5 or compressing it. Therefore, the processing load on the control unit 11 can be reduced.
  • control unit 11 transmits divided data D6, D8, D10, and D12 (divided data reduced in step S12) to the external device 70 in steps S16 and S17, which will be described later.
  • the external device 70 can complement the data D by adding the already received divided data D5, D7, D9 and D11 without editing the divided data D6, D8, D10 and D12.
  • the processing load at 70 can also be reduced.
  • step S11 the control unit 11 determines that the section T4 is the first section A1 through determination control.
  • the data D collected at T4 is divided into four pieces of divided data D13 to D16 and transmitted to the external device 70 in real time in chronological order every first interval Y1 (step S13).
  • step S14 the control unit 11 determines whether or not there is remaining data WD.
  • Data D collected in sections T2 and T3 passed before section T4 includes divided data D6, D8, D10 and D12 that were not transmitted in the second control, and these divided data D6 and D8 , D10 and D12 are the remaining data WD. Therefore, in FIG. 3(d), since there is remaining data WD, the control unit 11 determines whether or not there is a remaining transmission capacity (step S15). If there is no remaining transmission capacity, the control unit 11 returns to step S10.
  • control unit 11 determines whether the section T4 in which the vehicle V1 travels is the third section A3. In this example, since the section T4 is the third section A3 (YES in step S15), the control unit 11 executes the third control of transmitting the remaining data WD to the external device 70 while traveling in the section T4 ( Steps S16, S17).
  • control unit 11 replaces the first data WD1 collected while the vehicle V1 travels in the predetermined section R1 among the remaining data WD with the first data WD1 collected while the vehicle V1 travels outside the predetermined section R1.
  • Priority control (step S16) is executed to transmit before the two data WD2.
  • the predetermined section R1 is a section in which it is highly necessary for the external device 70 to analyze the data D in more detail, specifically a section in which vehicle accidents are likely to occur (an area where vehicle accidents frequently occur).
  • the predetermined section R1 may be, for example, a section registered as an area where vehicle accidents frequently occur in the storage unit of the external device 70 or the storage unit 12 of the in-vehicle control device 10, or may include an intersection, a tunnel, a bridge, or a railroad crossing. It may be a section including the road, or a section (a sharp curve section) in which the radius of curvature of the road exceeds a predetermined curvature.
  • the sections T3 and T4 are the predetermined section R1.
  • the first data WD1 collected while the vehicle V1 travels the predetermined section R1 among the remaining data WD that is, the divided data D6, D8, D10, and D12
  • the second data WD2 collected while the vehicle V1 is traveling outside the predetermined section R1 among the remaining data WD are divided data D6 and D8. Therefore, the control unit 11 transmits the divided data D10 and D12 to the external device 70 before the divided data D6 and D8 while traveling in the section T4 (the third section A3).
  • the third control is executed in parallel with the first control.
  • the control unit 11 transmits the divided data D10 and D12 using the remaining transmission capacity in parallel with the control for transmitting the divided data D13 to D16 in chronological order.
  • the control unit 11 transmits the data D to the external device 70 with the capacity of the data D reduced. By doing so, the real-time property is maintained. Then, when the communication status is recovered and there is a surplus in the capacity of the data D to be transmitted (that is, while the vehicle V1 travels in the third section A3 after traveling in the second section A2), the control unit 11 Since the remaining data WD is transmitted in parallel with the real-time transmission of the data D, the data shortage in the external device 70 can be resolved, and the external device 70 can perform more suitable analysis.
  • step S11 when the vehicle V1 travels in the section T5, the control unit 11 determines that the section T5 is the first section A1 through determination control (step S11).
  • the data D collected at T5 is divided into four pieces of divided data D17 to D20 and transmitted to the external device 70 in real time in chronological order every first interval Y1 (step S13).
  • step S14 after determining that there is remaining data WD (divided data D6 and D8) (YES in step S14), the control unit 11 determines that the section T5 is the first section A1, not the third section A3, so the remaining transmission capacity It is determined that there is no (NO in step S15), and the process returns to step S10.
  • step S11 when the vehicle V1 travels in the section T6, the control unit 11 determines that the section T6 is the first section A1 through determination control (step S11).
  • the data D collected in step S13 is divided into four pieces of divided data D21 to D24 and transmitted to the external device 70 in real time in chronological order every first interval Y1 (step S13).
  • step S14 the control unit 11 determines that there is an extra transmission capacity because the section T6 is the third section A3.
  • the remaining data WD is transmitted to the external device 70 (steps S16 and S17).
  • the control unit 11 skips step S16 and transmits the second data WD2 (divided data D6 and D8) to the external device 70 while the vehicle V1 travels in the section T6. After that, the control unit 11 returns to the process of step S10.
  • step S17 may be omitted.
  • the second data WD2 may be transmitted in order from divided data collected at positions close to the predetermined section R1.
  • the control section 11 may first transmit the divided data D8 and then transmit the divided data D6.
  • the second data WD2 need not be entirely transmitted in step S17, and only part of the second data WD2 may be transmitted. For example, among the divided data D6 and D8, the divided data D8 collected at a position closer to the predetermined section R1 may be transmitted, and the divided data D6 farther from the predetermined region R1 than the divided data D8 may be discarded without being transmitted. .
  • the lack of data in the external device 70 can be resolved earlier by transmitting to the external device 70 in order from the data D that is more useful for data analysis.
  • step S12 the divided data D6, D8, D10 and D12 are thinned without being transmitted, and the divided data D5, D7, D9 and D11 are transmitted. That is, in the above-described embodiment, the second condition for transmitting the data D is a part (D6, D8, D10, D12 ) is not transmitted at all, and the remaining divided data D5, D7, D9, and D11 are transmitted to the external device 70 in chronological order.
  • the second condition is not limited to this.
  • the data D includes moving image data such as drive recorder data
  • the first condition is that the frame rate of the data D is set to a predetermined rate B1 (eg, 30 fps) or higher.
  • the second condition may include transmitting the data D at a frame rate lower than the predetermined rate B1.
  • the second condition is that the number of pixels of the data D should be the predetermined number of pixels. It may include transmitting as less than number B2.
  • the second condition may be a condition in which at least one of the frame rate and the number of pixels is lower than the first condition. .
  • FIG. 4 is a schematic diagram explaining a control method according to a modification.
  • the description of the portions that perform the same control as in FIG. 3 will be omitted as appropriate.
  • the control unit 11 executes determination control (step S11) so that the sections T2 and T3 are the second sections. A2 is determined.
  • the control unit 11 transmits the data D to the external device 70 via the communication device 20 according to the second condition (step S12).
  • the control unit 11 divides the data D collected in the intervals T2 and T3 into eight pieces of divided data D5 to D12, and reduces the data amount of each of these divided data D5 to D12. , in real time to the external device 70 in chronological order. Specifically, when the divided data D5 to D12 are moving image data, the control unit 11 reduces the frame rate of each of the divided data D5 to D12 to half of the first condition, and converts the divided data D5 to D12. Send.
  • the control unit 11 transmits the divided data D5 to D12 with the number of pixels of the divided data D5 to D12 reduced to half of the first condition.
  • the data D transmitted according to the second condition is coarse, the delay in the transmission of the data D can be suppressed.
  • the remaining data WD that has not been transmitted to the external device 70 is stored in the storage unit 12.
  • the remaining half of the divided data D9-D12 is the first data WD1
  • the remaining half of the divided data D5-D8 is the second data WD2.
  • the first data WD1 is transmitted preferentially over the second data WD2.
  • step S15 the control unit 11 determines whether or not there is an extra transmission capacity based on whether or not it is the third section A3. As a result, it is possible to uniformly determine whether or not there is a remaining transmission capacity, so that the processing load on the control unit 11 can be reduced.
  • the control unit 11 may dynamically determine whether or not there is an extra transmission capacity based on the communication status and the transmission speed of the data D.
  • the control unit 11 subtracts the average value Av1 of the transmission speed of the most recent predetermined time (for example, the most recent 10 minutes) from the average value Av2 of the transmission speed of the data D under the first condition in the predetermined time ( If Av1-Av2) is greater than a predetermined threshold value, it may be determined that there is an available transmission capacity.
  • the control unit 11 can flexibly determine whether or not to execute the third control according to the communication status and the data D transmission status.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Small-Scale Networks (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Un dispositif de commande monté sur véhicule selon la présente divulgation est pourvu d'une unité de commande pour amener des données collectées par un véhicule à être transmises d'un dispositif de communication à un dispositif externe, dans lequel : l'unité de commande exécute une première commande, tandis que le véhicule se déplace à travers un premier secteur, pour transmettre les données au dispositif externe dans l'ordre chronologique conformément à une première condition, une seconde commande, tandis que le véhicule se déplace à travers un second secteur dans lequel un état de communication entre un réseau et le dispositif de communication est moins approprié que dans le premier secteur, pour transmettre les données au dispositif externe dans l'ordre chronologique conformément à une seconde condition selon laquelle une quantité de données transmises par unité de temps est inférieure à la première condition, et une troisième commande, tandis que le véhicule se déplace à travers le premier secteur après la seconde commande, pour transmettre au dispositif externe des données restantes qui n'ont pas été transmises sous la seconde commande ; et la troisième commande comprend une commande de priorité pour transmettre des premières données collectées pendant que le véhicule se déplace à travers un secteur prescrit, parmi les données restantes, à l'avance de secondes données collectées tandis que le véhicule se déplace à l'extérieur du secteur prescrit.
PCT/JP2023/003802 2022-02-22 2023-02-06 Dispositif de commande monté sur véhicule, système de commande monté sur véhicule, procédé de commande et programme informatique WO2023162650A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019040506A (ja) * 2017-08-28 2019-03-14 株式会社デンソーテン 車載用装置、通信システム、収集装置および通信方法
WO2019188343A1 (fr) * 2018-03-28 2019-10-03 住友電気工業株式会社 Système d'aide à la conduite, dispositif embarqué, procédé et programme informatique
JP2020048297A (ja) * 2018-09-18 2020-03-26 トヨタ自動車株式会社 充電システム

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019040506A (ja) * 2017-08-28 2019-03-14 株式会社デンソーテン 車載用装置、通信システム、収集装置および通信方法
WO2019188343A1 (fr) * 2018-03-28 2019-10-03 住友電気工業株式会社 Système d'aide à la conduite, dispositif embarqué, procédé et programme informatique
JP2020048297A (ja) * 2018-09-18 2020-03-26 トヨタ自動車株式会社 充電システム

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