JP2024055296A - On-vehicle device, communication control method, and communication system - Google Patents

Abstract

[Problem] To improve the accuracy of detecting abnormalities related to a vehicle. [Solution] An on-board device mounted on a vehicle includes an acquisition unit that acquires vehicle information related to the vehicle and measurement result information related to the on-board device, the measurement result information including the measurement result of a measurement target that affects the transmission of the vehicle information, and a communication unit that transmits the vehicle information and the measurement result information acquired by the acquisition unit to a management device. [Selected Figure] Figure 2

Description

This disclosure relates to an in-vehicle device, a communication control method, and a communication system.

Conventionally, technologies for detecting abnormalities related to vehicles have been developed. For example, JP 4107238 A (Patent Document 1) discloses the following vehicle communication system. That is, the vehicle communication system is a vehicle communication system that communicates between each vehicle-mounted terminal device mounted on a plurality of vehicles and an information center via a network, and is characterized by comprising the steps of periodically transmitting vehicle position information, vehicle cumulative mileage information, etc., as information on the actual driving environment from each vehicle-mounted terminal device to the information center, transmitting failure occurrence information and diagnostic information from the vehicle-mounted terminal device of the vehicle in which a failure has occurred to the information center, extracting vehicles from the vehicle information database in the information center that have manufacturing conditions and environmental conditions such as information on the actual driving environment and information on the vehicle environment similar to those of the vehicle in which the failure has occurred, requesting the extracted vehicles to transmit diagnostic information to the information center, transmitting diagnostic information from the vehicle-mounted terminal device of the extracted vehicles to the information center, and analyzing the diagnostic information of the extracted vehicles, the position information of the extracted vehicles, and meteorological information and topographical information of the location, etc., in association with each other in the information center.

Japanese Patent No. 4107238

There is a need for technology that can improve the accuracy of detecting abnormalities in vehicles beyond the technology described in Patent Document 1.

This disclosure has been made to solve the above-mentioned problems, and its purpose is to provide an in-vehicle device, a communication control method, and a communication system that can improve the accuracy of detecting abnormalities related to a vehicle.

The on-board device of the present disclosure is an on-board device mounted on a vehicle, and includes an acquisition unit that acquires vehicle information related to the vehicle and measurement result information related to the on-board device, the measurement result information including the measurement results of a measurement target that affects the transmission of the vehicle information, and a communication unit that transmits the vehicle information and the measurement result information acquired by the acquisition unit.

One aspect of the present disclosure can be realized not only as an in-vehicle device having such a characteristic processing unit, but also as a program for causing a computer to execute the steps of such a characteristic process. Also, one aspect of the present disclosure can be realized as a semiconductor integrated circuit that realizes part or all of the in-vehicle device.

This disclosure makes it possible to improve the accuracy of detecting abnormalities in vehicles.

FIG. 1 is a diagram illustrating a configuration of a communication system according to an embodiment of the present disclosure. FIG. 2 is a diagram illustrating a configuration of an in-vehicle device according to an embodiment of the present disclosure. FIG. 3 is a diagram illustrating an example of a configuration of a vehicle information acquisition unit in the in-vehicle device according to the embodiment of the present disclosure. FIG. 4 is a diagram illustrating another example of the configuration of the vehicle information acquisition unit in the in-vehicle device according to the embodiment of the present disclosure. FIG. 5 is a diagram illustrating an example of a CAN table stored in the in-vehicle device according to the embodiment of the present disclosure. FIG. 6 is a diagram illustrating an example of the configuration of a measurement result information acquisition unit in an in-vehicle device according to an embodiment of the present disclosure. FIG. 7 is a diagram for explaining a process of calculating the ratio of power supply time per unit time by the in-vehicle device according to the embodiment of the present disclosure. FIG. 8 is a diagram illustrating an example of measurement result information transmitted by the in-vehicle device according to the embodiment of the present disclosure. FIG. 9 is a diagram illustrating a configuration of a management device according to an embodiment of the present disclosure. FIG. 10 is a diagram illustrating an example of setting information stored in a management device according to an embodiment of the present disclosure. FIG. 11 is a diagram illustrating another example of the setting information stored in the management device according to the embodiment of the present disclosure. FIG. 12 is a diagram illustrating an example of a theory table stored in the management device according to the embodiment of the present disclosure. FIG. 13 is a diagram illustrating an example of a collection record table stored by the management device according to the embodiment of the present disclosure. FIG. 14 is a flowchart defining an operational procedure when the vehicle information and the measurement result information are transmitted to the management device by the in-vehicle device according to the embodiment of the present disclosure. FIG. 15 is a diagram illustrating a sequence of processes performed by an in-vehicle device and a management device in a communication system according to an embodiment of the present disclosure. FIG. 16 is a diagram illustrating a sequence of a process for updating setting information in a communication system according to an embodiment of the present disclosure. FIG. 17 is a diagram illustrating an example of a collection record table stored in the management device according to the first modification of the embodiment of the present disclosure. FIG. 18 is a diagram illustrating a configuration of a second modified example of an in-vehicle device according to an embodiment of the present disclosure. FIG. 19 is a diagram illustrating an example of a collection record table stored in the management device according to the second modification of the embodiment of the present disclosure. FIG. 20 is a diagram illustrating a sequence of a setting process in the communication system according to the third modification of the embodiment of the present disclosure.

First, the contents of the embodiments of the present disclosure will be listed and described.
(1) An on-board device according to an embodiment of the present disclosure is an on-board device mounted on a vehicle, and includes an acquisition unit that acquires vehicle information related to the vehicle and measurement result information related to the on-board device, the measurement result information including the measurement results of a measurement target that affects the transmission of the vehicle information, and a communication unit that transmits the vehicle information and the measurement result information acquired by the acquisition unit to a management device.

In this manner, by transmitting vehicle information and measurement result information of measurement objects that affect the transmission of vehicle information to the management device, the management device can grasp the situation in which the transmission of vehicle information is affected, and therefore can detect abnormalities related to the vehicle more accurately. Therefore, the accuracy of detecting abnormalities related to the vehicle can be improved.

(2) In (1) above, the measurement result information may include measurement results related to a power supply unit that supplies power to the vehicle.

This configuration allows the management device to grasp the state of the power supply unit that affects the transmission of vehicle information, making it possible to more accurately detect abnormalities related to the vehicle.

(3) In (2) above, the measurement results regarding the power supply unit may include the proportion of time during which the power is supplied by the power supply unit per predetermined unit time.

This configuration makes it possible to more accurately grasp the status of vehicle information transmission depending on the length of time that power is being supplied by the power supply unit.

(4) In (2) or (3) above, the measurement results regarding the power supply unit may include the number of times the power supply unit is started per a predetermined unit time.

This configuration allows the vehicle information transmission status to be more accurately determined depending on the number of times the power supply unit has been started.

(5) In any of (1) to (4) above, the measurement result information may include a measurement result regarding communication quality between the communication unit and the management device.

This configuration makes it possible to more accurately grasp the transmission status of vehicle information depending on the communication quality between the communication unit and the management device.

(6) In any of (1) to (5) above, the acquisition unit may acquire the vehicle information based on setting information transmitted from the management device.

With this configuration, for example, even if an on-board device is added to a vehicle after the vehicle is shipped, it can send vehicle information to the management device in the same way as an on-board device that is installed in the vehicle before the shipment. In addition, for example, the type of vehicle information to be sent can be set, making it easy to identify the location where an abnormality has occurred.

(7) In the above (6), the communication unit may transmit version information indicating the version of the retained setting information to the management device, and the communication unit may request the management device to transmit new setting information based on judgment information transmitted from the management device indicating a judgment result of the version indicated by the version information.

This configuration makes it possible to reflect, for example, the latest setting information when transmitting vehicle information to the management device, thereby further improving the accuracy of detection of vehicle abnormalities in the management device.

(8) In any of (1) to (7) above, the acquisition unit may acquire the vehicle information based on setting information transmitted from another device other than the management device, and the communication unit may further transmit the vehicle information acquired by the acquisition unit to the other device.

With this configuration, for example, vehicle information requested by a vehicle user can be transmitted to a device other than the management device, thereby improving user convenience.

(9) A communication control method according to an embodiment of the present disclosure may be a communication control method in an on-board device mounted on a vehicle, and may include a step of acquiring vehicle information about the vehicle and measurement result information about the on-board device, the measurement result information including the measurement result of a measurement target that affects the transmission of the vehicle information, and a step of transmitting the acquired vehicle information and the measurement result information to a management device.

In this manner, by transmitting vehicle information and measurement result information of measurement objects that affect the transmission of vehicle information to the management device, the management device can grasp the situation in which the transmission of vehicle information is affected, and therefore can detect abnormalities related to the vehicle more accurately. Therefore, the accuracy of detecting abnormalities related to the vehicle can be improved.

(10) A communication system according to an embodiment of the present disclosure includes an on-board device mounted on a vehicle and a management device that detects an abnormality related to the vehicle, the on-board device includes an acquisition unit that acquires vehicle information related to the vehicle and measurement result information related to the on-board device, the measurement result information including the measurement result of a measurement target that affects the transmission of the vehicle information, and a communication unit that transmits the vehicle information and the measurement result information acquired by the acquisition unit to the management device, and the management device detects the abnormality based on the vehicle information and the measurement result information received from the communication unit.

In this manner, by transmitting vehicle information and measurement result information of measurement objects that affect the transmission of vehicle information to the management device, the management device can grasp the situation in which the transmission of vehicle information is affected, and therefore can detect abnormalities related to the vehicle more accurately. Therefore, the accuracy of detecting abnormalities related to the vehicle can be improved.

The following describes embodiments of the present disclosure with reference to the drawings. Note that the same or corresponding parts in the drawings are given the same reference numerals and their description will not be repeated. In addition, at least some of the embodiments described below may be combined in any manner.

[Communications system]
Fig. 1 is a diagram showing a configuration of a communication system according to an embodiment of the present disclosure. Referring to Fig. 1, a communication system 501 includes one or more in-vehicle devices 101, a management device 201, and a terminal device 301. Each in-vehicle device 101 and the management device 201 can transmit and receive information via an external network 161 such as the Internet. The in-vehicle device 101 is mounted on a vehicle 10.

The management device 201 and the terminal device 301 are used, for example, by a business operator who manages the operation of vehicles, or by an individual (hereinafter, collectively referred to as a user). The management device 201 is, for example, a server. The terminal device 301 is, for example, a communication terminal device such as a smartphone or a tablet.

The management device 201 receives vehicle information related to the corresponding vehicle 10 from one or more in-vehicle devices 101. The management device 201 transmits setting information indicating the setting contents of the vehicle 10 related to the transmission of vehicle information to the in-vehicle device 101. The management device 201 then detects abnormalities related to the vehicle 10, such as malfunctions of the vehicle 10, based on the vehicle information received from the in-vehicle device 101. Details of the setting information will be described later.

The in-vehicle device 101 transmits vehicle information about the vehicle 10, including identification information about the vehicle 10, to the management device 201. The vehicle information includes, for example, information about the running of the vehicle 10.

Specifically, the in-vehicle device 101 transmits, for example, position information and vehicle speed information of the corresponding vehicle 10 to the management device 201. Note that the vehicle information is not limited to position information and vehicle speed information, but may also be driving control information such as braking operation in the vehicle 10. Furthermore, the vehicle information is not limited to information related to the traveling of the vehicle 10, but may also be information showing images captured by a camera mounted on the vehicle 10 and information showing the measurement results of a sensor mounted on the vehicle 10.

[In-vehicle device]
2 is a diagram showing a configuration of an in-vehicle device according to an embodiment of the present disclosure. Referring to Fig. 2, the in-vehicle device 101 is connected to a plurality of in-vehicle devices 111 via a CAN bus 51 that conforms to the CAN (Controller Area Network) (registered trademark) standard, for example.

The in-vehicle devices 111 include, for example, an autonomous driving ECU (Electronic Control Unit), an engine ECU, a TCU (Telematics Communication Unit), a sensor, a navigation device, a human-machine interface, and a camera.

In the example shown in FIG. 2, the in-vehicle device 101 is connected to multiple in-vehicle devices 111, 111A, 111B, and 111C.

The in-vehicle device 101 and the in-vehicle equipment 111 operate using power supplied from, for example, the battery 71 of the vehicle 10.

The in-vehicle device 101 includes a first communication unit 11, a setting unit 12, an acquisition unit 13, a second communication unit 14, a power supply circuit 15, and a memory unit 16. The acquisition unit 13 includes a vehicle information acquisition unit 31 and a measurement result information acquisition unit 32. Some or all of the first communication unit 11, the setting unit 12, the acquisition unit 13, and the second communication unit 14 are realized, for example, by a processing circuit (Circuitry) including one or more processors. The memory unit 16 is, for example, a non-volatile memory included in the processing circuit.

(First communication unit)
The first communication unit 11 communicates with the management device 201 via the external network 161 by performing wireless communication with a wireless base station (not shown) according to a communication method such as WiFi (registered trademark), LTE (Long Term Evolution) (registered trademark), or 5G. For example, the first communication unit 11 receives setting information transmitted from the management device 201 via the external network 161 and outputs the received setting information to the setting unit 12. Note that the first communication unit 11 is not limited to a configuration in which it communicates with the management device 201 via a wireless base station and the external network 161, but may be a configuration in which it communicates with the management device 201 via a wired line. In addition, the first communication unit 11 may be a configuration in which it communicates with the management device 201 further via another in-vehicle device.

(Vehicle information acquisition unit)
The vehicle information acquisition unit 31 acquires vehicle information related to the vehicle 10. The vehicle information acquisition unit 31 communicates with one or more in-vehicle devices 111 in accordance with the CAN standard.

In the example shown in FIG. 2, the vehicle information acquisition unit 31 is connected to the in-vehicle devices 111A, 111B, and 111C via three CAN buses 51, CAN buses 51A, 51B, and 51C, respectively. Hereinafter, the CAN bus 51A is also referred to as "CAN1," the CAN bus 51B as "CAN2," and the CAN bus 51C as "CAN3."

The in-vehicle device 101 is not limited to a configuration in which three CAN buses 51 are connected to the vehicle information acquisition unit 31, but may be configured to connect one or more CAN buses 51.

In addition, the in-vehicle device 101 and each in-vehicle device 111 may be configured to communicate in accordance with standards other than CAN, such as CAN FD (CAN with Flexible Data Rate), Ethernet (registered trademark), FlexRay (registered trademark), MOST (Media Oriented System Transport) (registered trademark), and LIN (Local Interconnect Network).

The in-vehicle devices 111 transmit their own vehicle information to the vehicle information acquisition unit 31. The vehicle information transmitted from each in-vehicle device 111 via the CAN bus 51 is stored in a CAN frame with a CAN-ID (Identifier) indicating the type of data, etc. In the following, it is assumed that the CAN-ID of the CAN frame storing the vehicle information of the in-vehicle device 111A is "001", the CAN-ID of the CAN frame storing the vehicle information of the in-vehicle device 111B is "002", and the CAN-ID of the CAN frame storing the vehicle information of the in-vehicle device 111C is "003".

When the setting unit 12 receives the setting information from the first communication unit 11, it stores the setting information in the storage unit 16 and performs a setting process related to the transmission of vehicle information based on the setting information. For example, as the setting process, the setting unit 12 performs a setting so that vehicle information corresponding to the type of data indicated by the setting information is transmitted to the management device 201.

For example, when the setting unit 12 receives setting information indicating CAN-ID "001", as a setting process, it sets the vehicle information acquisition unit 31 so that the vehicle information contained in the CAN frame with CAN-ID "001" is sent to the management device 201.

More specifically, when the vehicle information acquisition unit 31 regularly or irregularly acquires vehicle information transmitted from the in-vehicle device 111A, the setting unit 12 sets the vehicle information acquisition unit 31 to output the vehicle information contained in the CAN frame with CAN-ID "001" to the first communication unit 11. The setting unit 12 also sets the first communication unit 11 to transmit the vehicle information received from the vehicle information acquisition unit 31 to the management device 201.

On the other hand, when the vehicle information acquisition unit 31 has not acquired vehicle information from the in-vehicle device 111A, the setting unit 12 requests the in-vehicle device 111A to transmit vehicle information via the vehicle information acquisition unit 31 as a setting process. Upon receiving a request from the in-vehicle device 101, the in-vehicle device 111A transmits a CAN frame with CAN-ID "001" to the in-vehicle device 101 periodically or irregularly. The setting unit 12 also sets the vehicle information acquisition unit 31 to output the vehicle information contained in the CAN frame with CAN-ID "001" to the first communication unit 11. The setting unit 12 also sets the first communication unit 11 to transmit the vehicle information received from the vehicle information acquisition unit 31 to the management device 201.

FIG. 3 is a diagram illustrating an example of the configuration of a vehicle information acquisition unit in an in-vehicle device according to an embodiment of the present disclosure. With reference to FIG. 3, the vehicle information acquisition unit 31 includes a plurality of receiving units 41 and a processing unit 42.

The multiple receivers 41 are provided corresponding to the multiple CAN buses 51, respectively. In the example shown in FIG. 4, the vehicle information acquisition unit 31 includes three receivers 41A, 41B, and 41C as the multiple receivers 41. The receivers 41A, 41B, and 41C are provided corresponding to the CAN buses 51A, 51B, and 51C, respectively.

When each receiver 41 receives a CAN frame from an in-vehicle device 111 via the corresponding CAN bus 51, it stores the received CAN frame in a buffer (not shown) and notifies the processor 42 that the frame has been stored.

When the processing unit 42 receives a notification from the receiving unit 41 that the CAN frame has been stored, if the CAN-ID included in the setting information in the memory unit 16 matches the CAN-ID of the CAN frame stored in the buffer of the receiving unit 41, the processing unit 42 selects the vehicle information included in the CAN frame stored in the buffer as the vehicle information to be transmitted to the management device 201. The processing unit 42 outputs the selected vehicle information to the first communication unit 11 and the second communication unit 14.

Figure 4 is a diagram showing another example of the configuration of the vehicle information acquisition unit in the in-vehicle device according to the embodiment of the present disclosure. With reference to Figure 4, the vehicle information acquisition unit 31 includes one receiving unit 141 and a processing unit 42.

When the receiving unit 141 receives a CAN frame via each CAN bus 51, it stores the received CAN frame in a buffer (not shown) and outputs a notification to the processing unit 42 that the frame has been stored.

Figure 5 shows an example of a CAN table stored by an in-vehicle device according to an embodiment of the present disclosure.

Referring to FIG. 5, the memory unit 16 stores a CAN table Tb1 that indicates the correspondence between CAN-IDs and CAN buses 51. For example, the CAN table Tb1 indicates the correspondence between the type of data included in a CAN frame and the CAN bus 51 through which the CAN frame is transmitted.

In CAN table Tb1, the CAN bus 51 through which the CAN frame with CAN-ID "001" is transmitted is "CAN1". The CAN bus 51 through which the CAN frame with CAN-ID "002" is transmitted is "CAN2". The CAN bus 51 through which the CAN frame with CAN-ID "003" is transmitted is "CAN3".

When the processing unit 42 receives a notification from the receiving unit 141 that the CAN frame has been stored, it reads out the CAN frame stored in the buffer of the receiving unit 141. The processing unit 42 refers to the CAN table in the storage unit 16 to identify the CAN bus 51 corresponding to the CAN-ID included in the read CAN frame. As a result, the processing unit 42 determines that the CAN frame transmitted on the identified CAN bus 51 has been received. Then, if the CAN frame of the CAN-ID set in the setting process matches the CAN-ID of the CAN frame stored in the buffer of the receiving unit 141, the processing unit 42 selects the vehicle information included in the CAN frame stored in the buffer as the vehicle information to be transmitted to the management device 201. The processing unit 42 outputs the selected vehicle information to the first communication unit 11 and the second communication unit 14.

Referring again to FIG. 2, the first communication unit 11 transmits the vehicle information received from the vehicle information acquisition unit 31 to the management device 201.

(Second communication unit)
For example, the second communication unit 14 communicates with the terminal device 301 according to a USB (Universal Serial Bus) communication method. Note that the second communication unit 14 and the terminal device 301 may be configured to perform wireless communication according to a standard such as Bluetooth (registered trademark).

The second communication unit 14 transmits the vehicle information received from the vehicle information acquisition unit 31, i.e., the vehicle information acquired by the vehicle information acquisition unit 31, to the terminal device 301.

The terminal device 301 outputs the received vehicle information. For example, the terminal device 301 displays the contents of the received vehicle information on its own display unit.

(Power supply circuit)
The power supply circuit 15 supplies power to each unit in the in-vehicle device 101. For example, the power supply circuit 15 converts the voltage supplied from a battery 71 mounted on the vehicle 10 to a voltage of a predetermined level and outputs it to each unit.

The ignition power supply 72 is switched between an ON state in which power is supplied to the power supply circuit 15 and an OFF state in which the supply of power to the power supply circuit 15 is stopped in accordance with a predetermined operation by the user. The ignition power supply 72 is an example of a power supply unit that supplies power to the vehicle 10.

[Problem Description]
Japanese Patent Application Laid-Open No. 2003-233693 discloses a technique for detecting an abnormality in a vehicle based on position information and distance information of the vehicle.

However, in a configuration that detects abnormalities using vehicle position information and distance information, such as the system described in Patent Document 1, it is difficult to identify the location of the abnormality in the vehicle. Also, in the system described in Patent Document 1, for example, if a device without a diagnostic function, such as a camera, is installed in the vehicle after the vehicle is shipped, it is difficult to detect an abnormality related to the device.

In response to this, the in-vehicle device 101 according to the embodiment of the present disclosure solves this problem through the following configuration and operation.

[Measurement result information acquisition unit]
2 again, the measurement result information acquisition unit 32 acquires measurement result information that is related to the in-vehicle device 101 and includes the measurement result of a measurement object that affects the transmission of vehicle information. Here, a case will be described in which the measurement object is the ignition power supply 72. Note that the measurement object is not limited to the ignition power supply 72, and may be another power supply unit.

The measurement result information includes measurement results related to the ignition power supply 72. For example, the measurement results related to the ignition power supply 72 include the proportion of time during which power is supplied by the ignition power supply 72 per a given unit time. Hereinafter, the proportion of time during which power is supplied by the ignition power supply 72 per unit time is also referred to as the "power supply proportion."

FIG. 6 is a diagram showing an example of the configuration of a measurement result information acquisition unit in an in-vehicle device according to an embodiment of the present disclosure. With reference to FIG. 6, the measurement result information acquisition unit 32 includes a detection unit 61 and a measurement unit 62.

The detection unit 61 detects when the ignition power supply 72 is switched on and off by monitoring the output voltage of the ignition power supply 72.

More specifically, for example, the detection unit 61 detects whether the ignition power supply 72 is on or off by measuring the output voltage of the ignition power supply 72. If the measured voltage value is equal to or greater than a predetermined threshold, the detection unit 61 determines that the ignition power supply 72 is on, and if the measured voltage value is less than the threshold, the detection unit 61 determines that the ignition power supply 72 is off. The detection unit 61 notifies the measurement unit 62 that the ignition power supply 72 has switched from an on state to an off state, or from an off state to an on state.

Figure 7 is a diagram illustrating the process of calculating the ratio of power supply time per unit time by an in-vehicle device according to an embodiment of the present disclosure.

Referring to FIG. 7, when the measurement unit 62 is notified by the detection unit 61 that the ignition power supply 72 has been switched to the on state, the measurement unit 62 starts a calculation process to calculate the ratio of power supply time per unit time. In the example shown in FIG. 7, the "unit time" is one hour. Hereinafter, the ratio of power supply time per unit time is also referred to as the "power supply ratio."

Next, the measurement unit 62 performs time synchronization between its own in-vehicle device 101 and a GPS (Global Positioning System) receiver, which is an example of an in-vehicle device 111. For example, the measurement unit 62 performs time synchronization with the GPS receiver based on time synchronization information received from the GPS receiver, sets the current time of its own in-vehicle device 101, and stores the current time as the start time in the memory unit 16. In the example shown in FIG. 7, the start time is "1:30."

Next, the measurement unit 62 calculates the power supply ratio every time one hour has elapsed since a predetermined reference time. The measurement unit 62 stores the calculation result in the storage unit 16. In the example shown in FIG. 7, the reference time is "0:00", and the calculation process is performed from "2:00".

Next, when the measurement unit 62 is notified by the detection unit 61 that the ignition power supply 72 has been switched to the off state, the measurement unit 62 stores the current time in the memory unit 16 as the end time. The measurement unit 62 also calculates the power supply ratio at the end time. In the example shown in FIG. 7, the end time is "3:30."

The measurement unit 62 creates measurement result information including the calculation results obtained from the start time to the end time, and outputs the created measurement result information to the first communication unit 11.

The first communication unit 11 transmits the measurement result information received from the measurement unit 62 to the management device 201. The measurement unit 62 may create the measurement result information based on information acquired from an in-vehicle device that monitors the on/off switching of the ignition power supply 72.

Figure 8 shows an example of measurement result information transmitted by an in-vehicle device according to an embodiment of the present disclosure.

Referring to FIG. 7 and FIG. 8, at the time "0:00-1:00", the ignition power supply 72 is in the OFF state, so the power supply rate per hour is "0%". At the time "1:00-2:00", the ignition power supply 72 is switched to the ON state at "1:30", and power is supplied for 30 minutes from "1:30" to "2:00", so the power supply rate per hour is "50%". At the time "2:00-3:00", power is constantly supplied by the ignition power supply 72, so the power supply rate per hour is "100%". At the time "3:00-4:00", the ignition power supply 72 is switched to the OFF state at "3:30", and power is supplied for 30 minutes from "3:00" to "3:30", so the power supply rate is "50%".

[Management device]
Fig. 9 is a diagram showing a configuration of a management device according to an embodiment of the present disclosure. Referring to Fig. 9, the management device 201 includes a communication unit 1, a detection unit 2, an analysis unit 3, and a storage unit 4. A part or all of the communication unit 1, the detection unit 2, and the analysis unit 3 are realized, for example, by a processing circuit including one or more processors. The storage unit 4 is, for example, a non-volatile memory included in the processing circuit.

The communication unit 1 transmits and receives information to and from the in-vehicle device 101 via the external network 161. The communication unit 1 transmits setting information to the in-vehicle device 101. The setting information is registered and updated in the storage unit 4 by, for example, a user.

Figure 10 shows an example of configuration information stored by a management device according to an embodiment of the present disclosure.

Referring to FIG. 10, the setting information indicates, for example, the correspondence between vehicle identification information, version information indicating the version of the setting information to be applied to the in-vehicle device 101, for example the latest version, transmission cycle information indicating the transmission cycle of the vehicle information to the management device 201, and data information for identifying the vehicle information. The data information indicates, for example, the correspondence between the CAN bus 51 through which the CAN frame including the vehicle information is transmitted, the CAN-ID of the CAN frame, the data length, and the bit position of the vehicle information in the CAN frame.

In the example shown in FIG. 10, the version of the setting information to be applied to the in-vehicle device 101 of the vehicle 10 with the vehicle ID "ID-A" is "Ver1". The transmission period of the vehicle information is 500 milliseconds. The in-vehicle device 101 uploads vehicle information stored in a CAN frame with a CAN-ID of "001" transmitted on the CAN bus "CAN1" that has a data length of "1 byte" and a bit position of "3". The in-vehicle device 101 uploads vehicle information stored in a CAN frame with a CAN-ID of "002" transmitted on the CAN bus "CAN2" that has a data length of "1 byte" and a bit position of "6". The in-vehicle device 101 uploads vehicle information stored in a CAN frame with a CAN-ID of "003" transmitted on the CAN bus "CAN3" that has a data length of "2 bytes" and a bit position of "5".

Figure 11 is a diagram showing another example of configuration information stored by a management device according to an embodiment of the present disclosure.

Figure 11 shows the setting information when the in-vehicle device 101 and each in-vehicle device 111 communicate according to the LIN standard. In this case, the vehicle information transmitted from each in-vehicle device 111 via the bus is stored in a frame with an LID-ID that indicates the type of data, etc.

Referring to FIG. 11, the setting information indicates, for example, the correspondence between vehicle identification information, version information indicating the version of the setting information to be applied to the in-vehicle device 101 (for example, the latest version), transmission cycle information indicating the transmission cycle of the vehicle information to the management device 201, and data information for identifying the vehicle information. The data information indicates, for example, the correspondence between the LID-ID of the frame, the data length, and the bit position of the vehicle information in the frame.

In the example shown in FIG. 11, the version of the setting information to be applied to the in-vehicle device 101 of the vehicle 10 with the vehicle ID "ID-A" is "Ver1". The transmission period of the vehicle information is 500 milliseconds. The in-vehicle device 101 uploads vehicle information stored in a frame with LID-ID "051" that has a data length of "1 byte" and a bit position of "5". The in-vehicle device 101 uploads vehicle information stored in a frame with LID-ID "052" that has a data length of "2 bytes" and a bit position of "3".

Referring again to FIG. 9, the communication unit 1 stores the information received from the in-vehicle device 101 in the memory unit 4. More specifically, the communication unit 1 receives vehicle information and measurement result information from the in-vehicle device 101, and stores the received vehicle information and measurement result information in the memory unit 4.

The detection unit 2 performs a detection process to detect abnormalities related to the vehicle 10 based on the vehicle information and measurement result information received from the in-vehicle device 101.

More specifically, the detection unit 2 acquires a theoretical value of the number of uploads of vehicle information of the vehicle 10 corresponding to the identification information included in the vehicle information received by the communication unit 1. More specifically, for example, the detection unit 2 acquires from the storage unit 4 a theoretical table Tb20 indicating a theoretical value of the number of uploads of vehicle information per unit time for each vehicle 10. The theoretical table Tb20 is, for example, registered in advance in the storage unit 4 by a user.

Figure 12 shows an example of a theory table stored by a management device according to an embodiment of the present disclosure.

Referring to FIG. 12, theoretical table Tb20 shows theoretical values for the number of uploads of vehicle information transmitted on each CAN bus 51 for multiple time intervals. In theoretical table Tb20, the time interval is, for example, one hour, similar to the unit time in the calculation process by the in-vehicle device 101.

In theoretical table Tb20, the theoretical value of the number of uploads of vehicle information transmitted on CAN bus "CAN1" is "100" from 0:00 to 1:00, 1:00 to 2:00, and 2:00 to 3:00. The theoretical value of the number of uploads of vehicle information transmitted on CAN bus "CAN2" is "200" from 0:00 to 1:00, 1:00 to 2:00, and 2:00 to 3:00. The theoretical value of the number of uploads of vehicle information transmitted on CAN bus "CAN3" is "300" from 0:00 to 1:00, 1:00 to 2:00, and 2:00 to 3:00.

The analysis unit 3 acquires a collection record table Tb21 that indicates the correspondence between the collection record of the vehicle information received by the communication unit 1 and the measurement result information. In more detail, for example, the analysis unit 3 periodically or irregularly creates a collection record table Tb21 that indicates the correspondence between the collection record of the vehicle information and the measurement result information for each vehicle 10 based on the vehicle information and the measurement result information stored in the storage unit 4, and stores the table in the storage unit 4.

Figure 13 shows an example of a collection history table stored by a management device according to an embodiment of the present disclosure.

Referring to FIG. 13, in the collection record table Tb21, the collection record is divided into a plurality of time intervals. The time interval is, for example, one hour, like the time interval in the theoretical table Tb20. In the vehicle 10 with the vehicle ID "ID-A", the actual value of the number of uploads for the CAN bus "CAN1" is "50" from 0:00 to 1:00, "99" from 1:00 to 2:00, and "98" from 2:00 to 3:00. The actual value of the number of uploads for the CAN bus "CAN2" is "100" from 0:00 to 1:00, "201" from 1:00 to 2:00, and "199" from 2:00 to 3:00. The actual value of the number of uploads for the CAN bus "CAN3" is "150" from 0:00 to 1:00, "12" from 1:00 to 2:00, and "0" from 2:00 to 3:00.

In addition, for vehicle 10 with vehicle ID "ID-A", the actual power supply ratio is "50%" from 0:00 to 1:00, "100%" from 1:00 to 2:00, and "100%" from 2:00 to 3:00.

The detection unit 2 performs detection processing based on the theory table Tb20 and the collection history table Tb21.

More specifically, the detection unit 2, for example, performs an abnormality determination for the number of uploads. For example, when the actual value of the number of uploads in the collection history table Tb21 is equal to or greater than the threshold value Th, the detection unit 2 determines that the number of uploads is normal. On the other hand, when the actual value of the number of uploads in the collection history table Tb21 is less than the threshold value Th, the detection unit 2 determines that the number of uploads is abnormal.

Here, the threshold value Th is, for example, a value obtained by multiplying the theoretical value of the number of uploads of vehicle information transmitted via the CAN bus 51 in the time period targeted by the detection process by the power supply rate in that time period, minus a predetermined value. This allows the detection unit 2 to determine, for example, that the number of uploads is low because the period during which power is supplied by the ignition power supply 72 is short and the period during which vehicle information is uploaded is short.

The predetermined value is, for example, 2. In the following, the thresholds Th for determining whether there is an abnormality in the number of uploads of vehicle information transmitted on the CAN buses "CAN1", "CAN2", and "CAN3", respectively, are set to thresholds Th1, Th2, and Th3.

(Abnormality determination in the time interval from 0:00 to 1:00)
12 and 13, the threshold values Th1, Th2, and Th3 in the time interval from 0:00 to 1:00 are 48, 98, and 148, respectively, because the theoretical values of the corresponding number of uploads in that time interval are "100", "200", and "300", the power supply ratio in that time interval is "50%", and the predetermined value is "2".

Detection unit 2 determines that the number of uploads from 0:00 to 1:00 on CAN bus "CAN1" is normal because the actual number of uploads, "50", is greater than or equal to threshold value Th1, "48".

In addition, because the actual number of uploads from 0:00 to 1:00 on CAN bus "CAN2" is "100", which is greater than or equal to threshold value Th2 "98", detection unit 2 determines that the number of uploads is normal.

In addition, because the actual number of uploads from 0:00 to 1:00 on CAN bus "CAN3" is "150", which is equal to or greater than threshold value Th3 "148", detection unit 2 determines that the number of uploads is normal.

(Abnormality determination in the time period from 1:00 to 2:00)
The threshold values Th1, Th2, and Th3 in the time interval from 1:00 to 2:00 are 98, 198, and 298, respectively, because the theoretical values of the corresponding number of uploads in that time interval are "100", "200", and "300", the power supply ratio in that time interval is "100%", and the specified value is "2".

Detection unit 2 determines that the number of uploads from 1:00 to 2:00 on CAN bus "CAN1" is normal because the actual number of uploads, "99", is greater than or equal to threshold value Th1, "98".

In addition, because the actual number of uploads from 1:00 to 2:00 on CAN bus "CAN2" ("201") is equal to or greater than threshold value Th2 ("198"), detection unit 2 determines that the number of uploads is normal.

In addition, the detection unit 2 determines that the actual number of uploads from 1:00 to 2:00 on the CAN bus "CAN3" is abnormal because the actual number of uploads, "12," is less than the threshold value Th3, "298," for that time period.

(Abnormality determination in the time period from 2:00 to 3:00)
The threshold values Th1, Th2, and Th3 in the time interval from 2:00 to 3:00 are 98, 198, and 298, respectively, because the theoretical values of the corresponding number of uploads in that time interval are "100", "200", and "300", the power supply ratio in that time interval is "100%", and the specified value is "2".

Detection unit 2 determines that the number of uploads from 2:00 to 3:00 on CAN bus "CAN1" is normal because the actual number of uploads, "98", is greater than or equal to threshold value Th1, "98".

In addition, because the actual number of uploads from 2:00 to 3:00 on CAN bus "CAN2" is "199", which is equal to or greater than threshold value Th2 "198", detection unit 2 determines that the number of uploads is normal.

In addition, the detection unit 2 determines that the number of uploads from 2:00 to 3:00 on the CAN bus "CAN3" is abnormal because the actual value "0" of the number of uploads is less than the threshold value Th3 "298" for that time period.

The detection unit 2 outputs the abnormality detection result. For example, the detection unit 2 stores the abnormality detection result in the storage unit 4 or notifies the abnormality detection result.

[Request for new configuration information]
2, 4 and 12 again, in the in-vehicle device 101, for example, the first communication unit 11 transmits version information indicating the version of the retained setting information to the management device 201. Then, the first communication unit 11 requests the management device 201 to transmit new setting information based on the determination information indicating the determination result of the version indicated by the version information transmitted from the management device 201. That is, in the communication system 501, the setting information is updated.

More specifically, the first communication unit 11 periodically or irregularly transmits the version information contained in the setting information in the memory unit 16 to the management device 201.

The management device 201 determines whether the version indicated by the version information received from the in-vehicle device 101 is the same as the version of the setting information held by the management device 201. If the version indicated by the version information received from the in-vehicle device 101 is different from the version of the setting information held by the management device 201, the management device 201 transmits to the in-vehicle device 101 a negative determination information indicating a determination result that the versions are different.

In the in-vehicle device 101, when the first communication unit 11 receives negative determination information from the management device 201, the first communication unit 11 transmits request information to the management device 201, requesting the management device 201 to transmit new setting information. For example, the first communication unit 11 transmits request information including the ID of the vehicle 10 in which the in-vehicle device 101 is mounted to the management device 201.

When the management device 201 receives the request information from the in-vehicle device 101, it transmits new setting information to the in-vehicle device 101.

In more detail, for example, when the management device 201 receives request information from the in-vehicle device 101, the management device 201 transmits, as new setting information, setting information stored in the memory unit 4 that corresponds to the ID of the vehicle 10 included in the received request information to the in-vehicle device 101.

In the in-vehicle device 101, when the first communication unit 11 receives new setting information from the management device 201, it outputs the received setting information to the setting unit 12.

When the setting unit 12 receives new setting information from the first communication unit 11, it stores the new setting information in the storage unit 16 and updates the setting contents related to the transmission of vehicle information based on the new setting information. The vehicle information acquisition unit 31 acquires vehicle information according to the new setting contents.

<Operation flow>
FIG. 14 is a flowchart defining an operational procedure when the vehicle information and the measurement result information are transmitted to the management device by the in-vehicle device according to the embodiment of the present disclosure.

Referring to FIG. 14, first, the in-vehicle device 101 waits to transmit vehicle information until it receives setting information from the management device 201 (NO in step S101).

Next, when the in-vehicle device 101 receives setting information from the management device 201 (YES in step S101), the in-vehicle device 101 performs setting processing related to the transmission of vehicle information based on the received setting information. For example, as described above, as part of the setting processing, the in-vehicle device 101 performs setting so that vehicle information corresponding to the type of data indicated by the setting information is transmitted to the management device 201 (step S102).

Next, the in-vehicle device 101 acquires vehicle information periodically or irregularly (step S103).

Next, the in-vehicle device 101 selects vehicle information from the acquired vehicle information according to the settings, and transmits the selected vehicle information to the management device 201 (step S104).

Next, the in-vehicle device 101 acquires the measurement result information and transmits it to the management device 201. For example, as described above, the in-vehicle device 101 transmits the measurement result information including the measurement result related to the ignition power supply 72 to the management device 201. Specifically, the in-vehicle device 101 calculates the power supply ratio and transmits the measurement result information including the calculation result to the management device 201 (step S105). Note that steps S104 and S105 may be executed in a reverse order or in parallel.

Next, the in-vehicle device 101 repeats sending the acquired vehicle information and measurement result information (steps S103 to S105) until new setting information is received from the management device 201 (NO in step S106).

On the other hand, when the in-vehicle device 101 receives new setting information from the management device 201 (YES in step S106), it performs setting processing related to the transmission of vehicle information based on the received new setting information (step S102).

In this way, the in-vehicle device 101 performs setting processing related to the transmission of vehicle information based on the setting information transmitted from the management device 201. Even in a situation where the in-vehicle device 101 is installed in the vehicle 10 after the vehicle 10 is shipped and the vehicle information to be transmitted to the management device 201 is unknown, the in-vehicle device 101 can select the vehicle information to be transmitted to the management device 201 in the same way as an in-vehicle device installed before the vehicle 10 is shipped.

Figure 15 is a diagram showing an example of a processing sequence of an in-vehicle device and a management device in a communication system according to an embodiment of the present disclosure.

Referring to FIG. 15, first, the in-vehicle device 101 starts up when power is supplied from the battery 71 (step S201). Also, the in-vehicle device 111 starts up when power is supplied from the battery 71 (step S202).

Next, the in-vehicle device 101 starts a calculation process to calculate the power supply ratio. The in-vehicle device 101 sequentially stores the calculation results in the memory unit 16 (step S203).

Next, the in-vehicle device 101 periodically or irregularly acquires vehicle information from the in-vehicle equipment 111 (step S204).

Next, the management device 201 transmits setting information indicating the settings of the vehicle 10 regarding the transmission of vehicle information to the in-vehicle device 101 (step S205).

Next, the in-vehicle device 101 performs a setting process related to the transmission of vehicle information based on the setting information received from the management device 201. For example, as described above, the in-vehicle device 101 performs a setting process so that the vehicle information corresponding to the CAN-ID indicated in the received setting information is transmitted to the management device 201 (step S206).

Next, the in-vehicle device 101 selects vehicle information from the acquired vehicle information according to the settings, and transmits the selected vehicle information to the management device 201 (step S207).

Next, when the in-vehicle device 101 detects that the ignition power supply 72 has been switched to the on state, it performs time synchronization with other devices and stores the current time in the memory unit 16 as the start time of the calculation process for calculating the power supply ratio (step S208).

Next, the in-vehicle device 101 performs a calculation process. For example, as described above, the in-vehicle device 101 calculates the power supply ratio each time a unit of time has elapsed since a predetermined reference time. The in-vehicle device 101 stores the calculation result in the memory unit 16 (step S209).

Next, when the in-vehicle device 101 detects that the ignition power supply 72 has been switched to the off state (step S210), the in-vehicle device 101 stores the current time at which the switch to the off state is detected as the end time in the memory unit 16. The in-vehicle device 101 then calculates the power supply ratio at the end time. The in-vehicle device 101 stores the calculation result in the memory unit 16 (step S211).

Next, the in-vehicle device 101 creates measurement result information including the calculation results obtained from the start time to the end time, and transmits the created measurement result information to the management device 201 (step S212).

Next, the management device 201 performs detection processing based on the vehicle information and measurement result information received from the in-vehicle device 101 (step S213).

Next, the management device 201 outputs the abnormality detection result. For example, the management device 201 stores the abnormality detection result in the memory unit 4 or notifies the abnormality detection result (step S214).

Figure 16 is a diagram showing the sequence of the process of updating configuration information in a communication system according to an embodiment of the present disclosure.

Referring to FIG. 16, first, the in-vehicle device 101 acquires vehicle information from the in-vehicle equipment 111 on a regular or irregular basis (step S301).

Next, the in-vehicle device 101 selects vehicle information from the acquired vehicle information according to the settings. The in-vehicle device 101 then transmits the selected vehicle information to the management device 201 (step S302).

Next, the in-vehicle device 101 transmits version information indicating the version of the configuration information it holds to the management device 201 (step S303).

Next, the management device 201 performs a determination process to determine whether the version indicated by the version information received from the in-vehicle device 101 is the same as the version of the setting information held by the management device 201 (step S304).

Next, the management device 201 transmits to the in-vehicle device 101 judgment information indicating the judgment result of the version indicated by the version information received from the in-vehicle device 101. Here, the management device 201 transmits, as the judgment information, judgment negation information indicating the judgment result that the version indicated by the version information received from the in-vehicle device 101 is different from the version of the setting information held by the management device 201 (step S305).

Next, when the in-vehicle device 101 receives the negative determination information, it transmits request information to the management device 201 requesting the management device 201 to transmit new setting information (step S306).

Next, when the management device 201 receives the request information from the in-vehicle device 101, it transmits new setting information to the in-vehicle device 101 (step S307).

Next, the in-vehicle device 101 updates the settings related to the transmission of vehicle information based on the new setting information received from the management device 201 (step S308).

Next, the in-vehicle device 101 acquires new vehicle information (step S309).

Next, the in-vehicle device 101 selects vehicle information from the newly acquired vehicle information according to the updated settings. Then, the in-vehicle device 101 transmits the selected vehicle information to the management device 201 (step S310).

[Modification 1]
In the in-vehicle device 101 according to the embodiment of the present disclosure, the measurement result information acquiring unit 32 is configured to acquire information including the power supply ratio as the measurement result information including the measurement result related to the ignition power supply 72, but this is not limited thereto. The acquiring unit 13 may acquire information including the number of times the ignition power supply 72 is started per a predetermined unit time as the measurement result information.

In the first modified example, the measurement unit 62 in the measurement result information acquisition unit 32 counts the number of times the ignition power supply 72 is started per unit time. For example, when the measurement unit 62 establishes time synchronization between its own in-vehicle device 101 and the GPS receiver, it counts the number of times the ignition power supply 72 is switched from an off state to an on state per unit time.

Figure 17 shows an example of a collection history table stored by variant 1 of a management device according to an embodiment of the present disclosure.

In the collection record table Tb22 shown in FIG. 17, the record value of the number of uploads on the CAN bus "CAN1" of the vehicle 10 with the vehicle ID "ID-A" is "82" from 0:00 to 1:00, "99" from 1:00 to 2:00, and "98" from 2:00 to 3:00. The record value of the number of uploads on the CAN bus "CAN2" of the vehicle 10 with the vehicle ID "ID-A" is "167" from 0:00 to 1:00, "201" from 1:00 to 2:00, and "199" from 2:00 to 3:00. The record value of the number of uploads on the CAN bus "CAN3" of the vehicle 10 with the vehicle ID "ID-A" is "249" from 0:00 to 1:00, "12" from 1:00 to 2:00, and "0" from 2:00 to 3:00.

In addition, in the collected record table Tb22 shown in FIG. 17, the record value of the number of startups for the vehicle 10 with the vehicle ID "ID-A" is "2" from 0:00 to 1:00, "0" from 1:00 to 2:00, and "0" from 2:00 to 3:00.

In variant example 1, the detection unit 2 in the management device 201 performs detection processing based on the theory table Tb20 and the collection history table Tb22.

In the vehicle 10, it takes time for the in-vehicle system including the in-vehicle device 101 and the in-vehicle equipment 111 to start up and for the in-vehicle system to shut down. Therefore, the period during which power is supplied to the in-vehicle device 101 is, for example, the time obtained by subtracting from the unit time the value obtained by multiplying the total time required for the in-vehicle system to start up and the time required for the in-vehicle system to shut down by the number of startups.

For example, consider a case where the unit time is 1 hour, the total time is 5 minutes, and the number of startups is 2. In this case, the time during which power is supplied to the in-vehicle device 101 is 50 minutes, which is 1 hour minus 10 minutes. In other words, the proportion of power supply time per unit time when the number of startups is 2 is approximately 80%.

In the first modification, the detection unit 2 determines that the number of uploads is abnormal when the actual value of the number of uploads in the collection history table Tb22 is less than the threshold value Th. In the first modification, the threshold value Th is, for example, a value obtained by multiplying a theoretical value of the number of uploads of vehicle information transmitted via the CAN bus 51 in the time period targeted by the detection process by a power supply rate according to the number of startups in that time period. In this way, in the first modification, the detection unit 2 can determine, for example, that the number of uploads is low because the ignition power supply 72 is started many times and the period during which vehicle information is uploaded is short.

In the examples shown in Figures 12 and 17, for example, the power supply ratio according to the number of startups is 80% when the number of startups is "2", and is 100% when the number of startups is "0".

(Abnormality determination in the time interval from 0:00 to 1:00)
In the examples shown in Figures 12 and 17, the thresholds Th1, Th2, and Th3 in the time interval from 0:00 to 1:00 are 80, 160, and 240, respectively, because the corresponding theoretical values of the number of uploads in that time interval are "100,""200," and "300," respectively, and the number of activations in that time interval is "2."

Detection unit 2 determines that the number of uploads from 0:00 to 1:00 on CAN bus "CAN1" is normal because the actual number of uploads, "82", is greater than or equal to threshold value Th1, "80".

In addition, because the actual number of uploads from 0:00 to 1:00 on CAN bus "CAN2" is "167", which is greater than or equal to threshold value Th2 "160", detection unit 2 determines that the number of uploads is normal.

In addition, because the actual number of uploads from 0:00 to 1:00 on CAN bus "CAN3" is "249", which is greater than or equal to threshold value Th3 "240", detection unit 2 determines that the number of uploads is normal.

In addition, in the first modified example, the results of the abnormality determination in the time period from 1:00 to 2:00 and the results of the abnormality determination in the time period from 2:00 to 3:00 are the same as those in FIG. 13.

[Modification 2]
In the in-vehicle device 101 according to the embodiment of the present disclosure, the measurement result information acquiring unit 32 is configured to acquire information including the measurement result regarding the ignition power supply 72 as the measurement result information, but this is not limited to this. The measurement result information acquiring unit 32 may acquire information including the measurement result regarding the communication quality between the first communication unit 11 and the management device 201.

Figure 18 is a diagram showing the configuration of variant 2 of an in-vehicle device according to an embodiment of the present disclosure. With reference to Figure 18, the first communication unit 11 in the in-vehicle device 101A measures, for example, the SNR (signal to noise ratio) of a wireless signal received from a wireless base station (not shown) that includes information from the management device 201. That is, in variant 2, the measurement target that affects the transmission of vehicle information is the first communication unit 11. Here, the larger the SNR value, the smaller the noise and the better the wireless signal quality.

The first communication unit 11 measures the SNR of the wireless signal received by the first communication unit 11 for each unit time during a predetermined measurement period. Here, the unit time is, for example, one hour. The first communication unit 11 outputs the measurement results for each unit time to the measurement result information acquisition unit 32.

The measurement result information acquisition unit 32 acquires the measurement results of the SNR of the wireless signal by the first communication unit 11. More specifically, the measurement result information acquisition unit 32 creates measurement result information including the measurement results for each unit time in a predetermined period, and transmits the created measurement result information to the management device 201 via the first communication unit 11.

Figure 19 shows an example of a collection history table stored by variant 2 of a management device according to an embodiment of the present disclosure.

In the collection record table Tb23 shown in FIG. 19, the record value of the number of uploads on the CAN bus "CAN1" of the vehicle 10 with the vehicle ID "ID-A" is "10" from 0:00 to 1:00, "99" from 1:00 to 2:00, and "100" from 2:00 to 3:00. The record value of the number of uploads on the CAN bus "CAN2" of the vehicle 10 with the vehicle ID "ID-A" is "21" from 0:00 to 1:00, "201" from 1:00 to 2:00, and "198" from 2:00 to 3:00. The record value of the number of uploads on the CAN bus "CAN3" of the vehicle 10 with the vehicle ID "ID-A" is "29" from 0:00 to 1:00, "300" from 1:00 to 2:00, and "298" from 2:00 to 3:00.

In addition, in the collected results table Tb23 shown in FIG. 19, the communication method between the vehicle 10 and the management device 201 is "LTE." In addition, in the collected results table Tb23 shown in FIG. 16, the results value of the communication quality for the vehicle 10 with vehicle ID "ID-A" is "10" from 0:00 to 1:00, "99" from 1:00 to 2:00, and "99" from 2:00 to 3:00.

In variant 2, the detection unit 2 in the management device 201 performs detection processing based on the theory table Tb20 and the collection history table Tb23.

More specifically, in variant 2, when the actual value of the number of uploads in the collection history table Tb23 is less than the threshold value Th, the detection unit 2 determines that the number of uploads is abnormal. In variant 2, the threshold value Th is a value obtained by multiplying the theoretical value of the number of uploads of vehicle information transmitted via the CAN bus 51 in the time period targeted by the detection process by the percentage of the actual value of the communication quality in that time period, minus a predetermined value. Here, the predetermined value is, for example, 2.

(Abnormality determination in the time interval from 0:00 to 1:00)
12 and 19, the thresholds Th1, Th2, and Th3 in the time interval from 0:00 to 1:00 are 8, 18, and 28, respectively, because the theoretical values of the corresponding number of uploads in that time interval are "100", "200", and "300", the communication quality in that time interval is "10", and the predetermined value is "2".

Detection unit 2 determines that the number of uploads from 0:00 to 1:00 on CAN bus "CAN1" is normal because the actual number of uploads, "10", is greater than or equal to threshold value Th1, "8".

In addition, because the actual number of uploads from 0:00 to 1:00 on CAN bus "CAN2" is "21", which is equal to or greater than threshold value Th2 "18", detection unit 2 determines that the number of uploads is normal.

In addition, because the actual number of uploads from 0:00 to 1:00 on CAN bus "CAN3" is "29", which is equal to or greater than threshold value Th3 "28", detection unit 2 determines that the number of uploads is normal.

In addition, in the second modification, the results of the abnormality determination in the time period from 1:00 to 2:00 and the results of the abnormality determination in the time period from 2:00 to 3:00 are the same as those in FIG. 13.

[Modification 3]
Although the in-vehicle device 101 according to the embodiment of the present disclosure is configured to receive the setting information from the management device 201, this is not limited thereto. The in-vehicle device 101 may be configured to receive the setting information from the terminal device 301.

In variant 3, the vehicle information acquisition unit 31 in the acquisition unit 13 acquires vehicle information based on setting information transmitted from a terminal device 301, which is another device different from the management device 201.

More specifically, the second communication unit 14 outputs the setting information received from the terminal device 301 to the setting unit 12. When the setting unit 12 receives the setting information from the second communication unit 14, it stores the setting information in the storage unit 16 and performs setting processing related to the transmission of vehicle information based on the setting information.

Figure 20 is a diagram showing the sequence of the setting process in variant 3 of the communication system according to the embodiment of the present disclosure.

Referring to FIG. 20, first, the in-vehicle device 101 acquires vehicle information from the in-vehicle equipment 111 on a regular or irregular basis (step S401).

Next, the terminal device 301 transmits setting information indicating the setting contents of the vehicle 10 regarding the transmission of vehicle information to the in-vehicle device 101. For example, the setting information is stored in the terminal device 301 according to the user's operation (step S402).

Next, the in-vehicle device 101 performs a setting process related to the transmission of vehicle information based on the setting information received from the terminal device 301. For example, the in-vehicle device 101 performs a setting process so that the vehicle information corresponding to the CAN-ID indicated in the received setting information is transmitted to the terminal device 301 (step S403).

Next, the in-vehicle device 101 selects vehicle information from the acquired vehicle information in accordance with the setting contents, and transmits the selected vehicle information to the terminal device 301 (step S404). The in-vehicle device 101 also transmits the selected vehicle information to the management device 201 (step S405).

Next, when the terminal device 301 receives the vehicle information from the in-vehicle device 101, it displays the contents of the received vehicle information, for example, on its own display unit (step S406).

Next, the terminal device 301 transmits a setting change notification to the in-vehicle device 101 to change the setting information, for example, in accordance with a user operation (step S407).

Next, the in-vehicle device 101 transmits a changeability notification indicating whether the setting can be changed to the terminal device 301 as a response to the setting change notification received from the terminal device 301. Here, the in-vehicle device 101 transmits a notification to the terminal device 301 indicating that the setting can be changed as the changeability notification (step S408).

Next, when the terminal device 301 receives a change permission/non-permission notification from the in-vehicle device 101, it transmits the changed setting information to the in-vehicle device 101 (step S409).

Next, the in-vehicle device 101 updates the settings based on the new setting information received from the terminal device 301 (step S410).

Next, the in-vehicle device 101 transmits an update completion notification to the terminal device 301 to notify the terminal device 301 that the update of the setting contents has been completed. The in-vehicle device 101 may also transmit the update completion notification to the management device 201 (step S411).

Next, the in-vehicle device 101 acquires new vehicle information (step S412).

Next, the in-vehicle device 101 selects vehicle information from the newly acquired vehicle information according to the updated settings, and transmits the selected vehicle information to the terminal device 301 (step S413). The in-vehicle device 101 also transmits the selected vehicle information to the management device 201 (step S414).

Next, when the terminal device 301 receives new vehicle information from the in-vehicle device 101, it displays the contents of the received vehicle information on its display unit or the like (step S415).

Note that some or all of the functions of the management device 201 according to the embodiment of the present disclosure may be provided by cloud computing. That is, the management device 201 according to the embodiment of the present disclosure may be a cloud server configured by multiple servers.

In addition, in the communication system 501 according to the embodiment of the present disclosure, the measurement object that affects the transmission of vehicle information is the ignition power supply 72, but this is not limited to this. The measurement object that affects the transmission of vehicle information may be another power supply unit.

In addition, in the communication system 501 according to the embodiment of the present disclosure, the first communication unit 11 is configured to transmit version information indicating the version of the retained setting information to the management device 201, but this is not limited to the above. The first communication unit 11 may be configured not to transmit version information to the management device 201. In other words, the setting contents related to the transmission of vehicle information do not need to be updated in the in-vehicle device 101.

In addition, in the communication system 501 according to the embodiment of the present disclosure, the in-vehicle device 101 is configured to include a second communication unit 14 that transmits vehicle information to the terminal device 301, but this is not limited to this. The in-vehicle device 101 may not include the second communication unit 14 and may not transmit vehicle information to the terminal device 301.

The above-described embodiments should be considered to be illustrative and not restrictive in all respects. The scope of the present invention is indicated by the claims rather than the above description, and is intended to include all modifications within the meaning and scope of the claims.

Each process (each function) in the above-mentioned embodiments is realized by a processing circuit including one or more processors. The processing circuit may be composed of an integrated circuit or the like that combines one or more memories, various analog circuits, and various digital circuits in addition to the one or more processors. The one or more memories store programs (instructions) that cause the one or more processors to execute each of the above processes. The one or more processors may execute each of the above processes according to the programs read from the one or more memories, or may execute each of the above processes according to a logic circuit that has been designed in advance to execute each of the above processes. The processor may be any of various processors suitable for computer control, such as a CPU (Central Processing Unit), a GPU (Graphics Processing Unit), a DSP (Digital Signal Processor), an FPGA (Field Programmable Gate Array), and an ASIC (Application Specific Integrated Circuit). The physically separated processors may cooperate with each other to execute the above processes. For example, the processors mounted on each of the physically separated computers may cooperate with each other via a network such as a LAN (Local Area Network), a WAN (Wide Area Network), or the Internet to execute the above processes. The program may be installed into the memory from an external server device or the like via the network, or may be distributed in a state stored on a recording medium such as a CD-ROM (Compact Disc Read Only Memory), a DVD-ROM (Digital Versatile Disc Read Only Memory), or a semiconductor memory, and may be installed into the memory from the recording medium.

The above description includes the following additional features.
[Appendix 1]
An in-vehicle device mounted in a vehicle,
A processing circuit is provided,
The processing circuitry includes:
Acquire vehicle information relating to the vehicle and measurement result information including measurement results of a measurement target that affects transmission of the vehicle information, the measurement result being related to the in-vehicle device;
The vehicle-mounted device transmits the vehicle information and the measurement result information acquired by the acquisition unit to the management device.

[Appendix 2]
A communication control program for use in an in-vehicle device mounted in a vehicle,
Computer,
an acquisition unit that acquires vehicle information related to the vehicle and measurement result information related to the in-vehicle device, the measurement result including the measurement result of a measurement target that affects transmission of the vehicle information;
a communication unit that transmits the vehicle information and the measurement result information acquired by the acquisition unit to a management device;
A communication control program that functions as a

REFERENCE SIGNS LIST 1 Communication unit 2 Detection unit 3 Analysis unit 4, 16 Memory unit 10 Vehicle 11 First communication unit 12 Setting unit 13 Acquisition unit 14 Second communication unit 15 Power supply circuit 31 Vehicle information acquisition unit 32 Measurement result information acquisition unit 41, 41A, 41B, 41C, 141 Receiving unit 42 Processing unit 51, 51A, 51B, 51C CAN bus 61 Detection unit 62 Measurement unit 71 Battery 72 Ignition power supply 101, 101A Vehicle-mounted device 111, 111A, 111B, 111C Vehicle-mounted equipment 161 External network 201 Management device 301 Terminal device

Claims (10)

An in-vehicle device mounted in a vehicle,
an acquisition unit that acquires vehicle information related to the vehicle and measurement result information related to the in-vehicle device, the measurement result including the measurement result of a measurement target that affects transmission of the vehicle information;
a communication unit configured to transmit the vehicle information and the measurement result information acquired by the acquisition unit to a management device. The in-vehicle device according to claim 1, wherein the measurement result information includes measurement results relating to a power supply unit that supplies power to the vehicle. The in-vehicle device according to claim 2, wherein the measurement result regarding the power supply unit includes a proportion of time during which the power is supplied by the power supply unit per predetermined unit time. The in-vehicle device according to claim 2 or 3, wherein the measurement results regarding the power supply unit include the number of times the power supply unit is started per predetermined unit time. The in-vehicle device according to claim 1 or 2, wherein the measurement result information includes a measurement result regarding communication quality between the communication unit and the management device. The in-vehicle device according to claim 1, wherein the acquisition unit acquires the vehicle information based on the setting information transmitted from the management device. The communication unit transmits version information indicating a version of the stored setting information to the management device,
The in-vehicle device according to claim 6 , wherein the communication unit requests the management device to transmit new setting information based on determination information indicating a determination result of the version indicated by the version information transmitted from the management device. The acquisition unit acquires the vehicle information based on setting information transmitted from another device other than the management device,
The in-vehicle device according to claim 1 , wherein the communication unit is further configured to transmit the vehicle information acquired by the acquisition unit to the other device. A communication control method for an in-vehicle device mounted in a vehicle, comprising:
acquiring vehicle information relating to the vehicle and measurement result information including measurement results of a measurement object that affects transmission of the vehicle information and that is related to the in-vehicle device;
and transmitting the acquired vehicle information and the acquired measurement result information to a management device. An on-board device mounted in a vehicle;
a management device that detects an abnormality related to the vehicle;
The in-vehicle device includes:
an acquisition unit that acquires vehicle information related to the vehicle and measurement result information related to the in-vehicle device, the measurement result including the measurement result of a measurement target that affects transmission of the vehicle information;
a communication unit that transmits the vehicle information and the measurement result information acquired by the acquisition unit to a management device,
The management device detects the abnormality based on the vehicle information and the measurement result information received from the communication unit.

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