JP2022118597A - On-vehicle relay device, abnormality determination system, abnormality determination method, and program - Google Patents

Abstract

To provide an on-vehicle relay device or the like which can properly determine an abnormality of a communication line.SOLUTION: An on-vehicle relay device is connected to a plurality of on-vehicle apparatuses and relays communication of the plurality of the on-vehicle apparatuses. The on-vehicle relay device includes a control section which controls the relay of the communication. The control section performs abnormality determination for a communication line for connecting an own device to the on-vehicle apparatuses when a communication state of the communication line is in an inactive state in which communication is not performed through the communication line.SELECTED DRAWING: Figure 1

Description

The present disclosure relates to an in-vehicle relay device, an abnormality determination system, an abnormality determination method, and a program.

A vehicle is equipped with a plurality of in-vehicle devices including an in-vehicle ECU (Electronic Control Unit) for controlling in-vehicle devices such as a power train system such as engine control and a body system such as air conditioner control. A plurality of in-vehicle devices are connected to the in-vehicle repeater via communication lines. An in-vehicle relay device relays communication between a plurality of in-vehicle devices (for example, Patent Literature 1).

JP 2017-47835 A

In the in-vehicle relay device of Patent Literature 1, no consideration is given to determining an abnormality in the connected communication line.

The present disclosure has been made in view of such circumstances, and it is an object of the present disclosure to provide an in-vehicle relay device or the like that can appropriately determine an abnormality in a communication line.

An in-vehicle relay device according to an aspect of the present disclosure is an in-vehicle relay device that is connected to a plurality of in-vehicle devices and relays communication of the plurality of in-vehicle devices, comprising a control unit that controls the relay of the communication, When the communication state of the communication line connecting the own device and the in-vehicle device is in an inactive state in which communication via the communication line is not performed, the control unit determines that the communication line is abnormal.

According to one aspect of the present disclosure, an abnormality in a communication line can be appropriately determined.

1 is a schematic diagram illustrating the configuration of an in-vehicle system according to Embodiment 1; FIG. 3 is a block diagram illustrating internal configurations of an in-vehicle relay device and an in-vehicle ECU; FIG. 4 is a conceptual diagram showing an example of contents of a routing table; FIG. 6 is a flowchart illustrating processing related to communication line abnormality detection performed by a control unit of an in-vehicle relay device; 4 is a conceptual diagram showing an example of contents of a communication state table; FIG. 9 is a flowchart illustrating processing related to abnormality determination processing performed by a control unit according to the second embodiment; FIG. 4 is a conceptual diagram showing an example of contents of a determination routing table; 10 is a flowchart illustrating processing related to abnormality determination processing performed by a control unit according to the third embodiment; FIG. 12 is a schematic diagram illustrating the configuration of an in-vehicle system according to Embodiment 4;

[Description of Embodiments of the Present Disclosure]
First, embodiments of the present disclosure will be enumerated and described. Moreover, at least part of the embodiments described below may be combined arbitrarily.

(1) An in-vehicle relay device according to an aspect of the present disclosure is an in-vehicle relay device that is connected to a plurality of in-vehicle devices and relays communication of the plurality of in-vehicle devices, and includes a control unit that controls the relay of the communication. wherein, when a communication state of a communication line connecting the device and the vehicle-mounted device is in an inactive state in which communication is not performed via the communication line, the control unit determines that the communication line is abnormal. I do.

In this aspect, the in-vehicle relay device and the in-vehicle equipment are connected by a communication line. When the communication state of the communication line is in an inactive state, no communication is performed between the vehicle-mounted repeater and the vehicle-mounted device. When the communication state of the communication line is in an inactive state, the control unit performs abnormality determination on the communication line. Since the communication line is not used for communication at the time of abnormality determination, the in-vehicle relay device can appropriately determine abnormality of the communication line.

(2) In the in-vehicle relay device according to an aspect of the present disclosure, the communication state of the communication line is changed from the active state in which communication via the communication line is performed when the on-vehicle device receives a sleep signal. The controller outputs the sleep signal to the in-vehicle device when the self-device transitions from the active state to the sleep state, and performs the abnormality determination after outputting the sleep signal.

In this aspect, when the communication state of the communication line is active, communication is performed between the in-vehicle relay device and the in-vehicle equipment. When the in-vehicle relay device transitions from the active state to the hibernation state, the control unit outputs a sleep signal to the in-vehicle device and performs abnormality determination. Since the in-vehicle device transitions from the activated state to the dormant state by receiving the sleep signal, the state of the communication line connecting the in-vehicle device receiving the sleep signal and the in-vehicle relay device transitions from the active state to the inactive state. . After outputting the sleep signal, the control unit performs an abnormality determination on the communication line, so it is possible to determine an abnormality on the communication line whose communication state is inactive.

(3) In the in-vehicle relay device according to an aspect of the present disclosure, the control unit stores the determination result of the abnormality determination in a predetermined storage area accessible from the self device, and the self device changes from the rest state to the When transitioning to the activated state, predetermined processing is performed according to the determination result stored in the predetermined storage area.

In this aspect, the determination result of the abnormality determination performed when the in-vehicle relay device transitions from the activated state to the idle state is stored in a predetermined storage area. When the in-vehicle relay device transitions from the hibernation state to the activation state, the control unit performs predetermined processing based on the determination result stored in the predetermined storage area. For example, when there is no abnormality in the communication line, the control unit outputs a start signal to the vehicle-mounted device connected to the vehicle-mounted relay device to start relaying communication. When the in-vehicle relay device transitions from the hibernation state to the active state, the control unit refers to the determination result stored in the predetermined storage area. It is possible to determine whether or not there is an abnormality in the communication line more quickly than when performing an abnormality determination. Since the in-vehicle relay device can start relaying communication earlier than in the above case, it is possible to start control of the vehicle earlier. That is, the vehicle can be started quickly.

(4) An in-vehicle relay device according to an aspect of the present disclosure is connected to a plurality of the communication lines, and the control unit stores a communication state of each of the plurality of communication lines in a communication state table. Based on this, the communication line in the inactive state is identified, and the abnormality determination is performed for the identified communication line.

In this aspect, a plurality of communication lines are connected to the in-vehicle relay device. The control unit identifies a communication line whose communication state is inactive based on a communication state table that stores the communication state of each communication line. The control unit performs abnormality determination on the specified communication line whose communication state is inactive. Based on the communication status table, the control unit determines whether the communication line is in an inactive state. Abnormality judgment can be performed on the line.

(5) In the in-vehicle relay device according to one aspect of the present disclosure, the communication state table is stored in a predetermined storage area accessible from the device itself, and the control unit is connected to each of the plurality of communication lines. The communication state of the communication line stored in the communication state table is updated according to the state of the vehicle-mounted device.

In this aspect, the communication status table is stored in a predetermined storage area that can be accessed by the in-vehicle relay device. The control unit updates the communication state of the communication line stored in the communication state table according to the state of the vehicle-mounted device connected to each communication line. When the state of the in-vehicle device is in the activated state and processing such as communication is being performed, the communication state of the communication line connecting the above-mentioned in-vehicle device and the in-vehicle repeater is active in the communication state table. status is updated. If the state of the on-vehicle device is in the active state and no processing such as communication is being performed, the communication state of the communication line connecting the on-vehicle device and the on-vehicle repeater is not in the communication state table. Updated to active state. When the state of the in-vehicle device is in the dormant state, the communication state of the communication line connecting the in-vehicle device and the in-vehicle repeater is updated to the inactive state in the communication state table. The in-vehicle relay device can perform abnormality determination for the communication line according to the state of the connected in-vehicle equipment.

(6) In the in-vehicle relay device according to one aspect of the present disclosure, the control unit outputs that there is an abnormality in the communication line when there is an abnormality in the communication line.

In this aspect, if the abnormality determination reveals that there is an abnormality in the communication line, the control unit notifies the communication line that there is an abnormality, for example, on the display of the navigation system provided in the vehicle, or by the driver of the vehicle. Output to your mobile device. It is possible to notify the driver that there is an abnormality in the communication line.

(7) In the in-vehicle relay device according to one aspect of the present disclosure, Ethernet communication protocol is used for the communication.

In this aspect, since the Ethernet communication protocol is used for communication, fast communication can be performed. Generally, when the Ethernet communication protocol is used, the in-vehicle relay device and one in-vehicle device are connected by one communication line compatible with the Ethernet communication protocol, so it is easy to determine the communication state of the communication line.

(8) In the in-vehicle relay device according to one aspect of the present disclosure, the abnormality determination is based on a measurement result of specific impedance of the communication line.

In this aspect, the abnormality of the communication line is determined by determination based on the measurement result of the specific impedance of the communication line, for example, TDR (Time domain reflectometry). By using the TDR, it is possible to accurately determine communication line abnormalities such as disconnection and poor contact.

(9) An abnormality determination system according to an aspect of the present disclosure is included in the in-vehicle device, connects the plurality of in-vehicle relay devices to the plurality of in-vehicle relay devices, and includes a communication trunk line included in the communication line. wherein each of the in-vehicle relay devices is connected to a plurality of the communication trunk lines, the in-vehicle relay device and the in-vehicle ECU included in the in-vehicle equipment are connected by communication branch lines included in the communication lines, and the When the communication state of the connected communication trunk line is in the inactive state, the in-vehicle relay device performs the abnormality determination for the communication trunk line, and determines that the communication state of the connected communication branch line is in the inactive state. If there is, the abnormality determination is performed for the communication branch line.

In this aspect, a plurality of in-vehicle relay devices are connected by a communication trunk line. Each in-vehicle relay device and the in-vehicle ECU are connected by a communication branch line. Communications of multiple in-vehicle ECUs are relayed via one or more in-vehicle relay devices. A plurality of communication trunk lines are connected to each in-vehicle relay device. Since communication can be relayed using a plurality of routes in relaying communication via a plurality of in-vehicle relay devices, redundancy can be achieved in relaying communication. When the communication state of the communication trunk line connected to the in-vehicle relay device is inactive, the in-vehicle relay device determines that the communication trunk line is abnormal. Since the communication trunk line is not used for communication at the time of the abnormality judgment, the abnormality judgment system can appropriately judge the abnormality of the communication trunk line. The in-vehicle relay device performs abnormality determination for the communication branch line when the communication state of the communication branch line connected to the own device is inactive. Since the communication branch line is not used for communication at the time of the abnormality determination, the abnormality determination system can appropriately determine the abnormality of the communication branch line.

(10) In the abnormality determination system according to one aspect of the present disclosure, the in-vehicle relay device, when performing the abnormality determination on one of the plurality of connected communication trunk lines, The communication of the in-vehicle ECU is relayed via another of the plurality of communication trunk lines.

In this aspect, when the in-vehicle relay device performs abnormality determination for one communication trunk line among the plurality of communication trunk lines connected to the self-device, other communication trunk lines among the plurality of communication trunk lines connected to the self-device are used. It relays the communication of the in-vehicle ECU via the main line. At this time, one of the plurality of communication trunk lines connected to the in-vehicle relay device is not used for communication, so the communication state of the one communication trunk line is inactive. Therefore, the abnormality determination is performed for the inactive communication trunk line. The in-vehicle relay device relays the communication of the in-vehicle ECU via one communication trunk line when performing an abnormality determination on another communication trunk line. The in-vehicle relay device can determine abnormality of the communication trunk line at any time.

(11) An abnormality determination method according to an aspect of the present disclosure is an abnormality determination method performed by an in-vehicle relay device that is connected to a plurality of in-vehicle devices and relays communication between the plurality of in-vehicle devices. When the communication state of the communication line connecting with the vehicle-mounted device is in an inactive state in which communication via the communication line is not performed, an abnormality determination is made for the communication line.

In this aspect, as in the case of aspect (1), it is possible to appropriately determine whether the communication line is abnormal.

(12) A program according to an aspect of the present disclosure causes a computer connected to a plurality of in-vehicle devices via a communication line to perform If there is, it causes the communication line to execute a process of determining whether there is an abnormality.

In this aspect, as in the case of aspect (1), it is possible to appropriately determine whether the communication line is abnormal.

[Details of Embodiments of the Present Disclosure]
The present disclosure will be specifically described based on the drawings showing the embodiments thereof. An in-vehicle device according to an embodiment of the present disclosure will be described below with reference to the drawings. The present disclosure is not limited to these examples, but is indicated by the scope of the claims, and is intended to include all modifications within the scope and meaning equivalent to the scope of the claims.

(Embodiment 1)
Embodiments will be described below with reference to the drawings. FIG. 1 is a schematic diagram illustrating the configuration of an in-vehicle system S according to the first embodiment. In-vehicle system S includes in-vehicle repeaters 1a, 1b, 1c and 1d mounted in vehicle C. As shown in FIG. The in-vehicle relay device 1a and the in-vehicle relay device 1b are connected by a communication trunk line 50a. The in-vehicle relay device 1a and the in-vehicle relay device 1c are connected by a communication trunk line 50b. The in-vehicle relay device 1b and the in-vehicle relay device 1d are connected by a communication trunk line 50c. The in-vehicle relay device 1c and the in-vehicle relay device 1d are connected by a communication trunk line 50d. The in-vehicle system S corresponds to an abnormality determination system.

Since the in-vehicle repeaters 1a, 1b, 1c, and 1d have the same configuration, they are collectively referred to as the in-vehicle repeater 1 below. Since the communication trunk lines 50a, 50b, 50c, and 50d have the same configuration, they are collectively referred to as the communication trunk line 50 below. As described above, two communication trunk lines 50 are connected to each in-vehicle relay device 1 . The four in-vehicle relay devices 1 are connected in a ring by a communication trunk line 50 .

The in-vehicle relay device 1a is connected to the in-vehicle ECU 2a by a communication branch line 51a, and is connected to the in-vehicle ECU 2b by a communication branch line 51b. The in-vehicle relay device 1b is connected to the in-vehicle ECU 2c by a communication branch line 51c, and is connected to the in-vehicle ECU 2d by a communication branch line 51d. The in-vehicle relay device 1c is connected to the in-vehicle ECU 2e by a communication branch line 51e, and is connected to the in-vehicle ECU 2f by a communication branch line 51f. The in-vehicle relay device 1d is connected to the in-vehicle ECU 2g by a communication branch line 51g, and is connected to the in-vehicle ECU 2h by a communication branch line 51h.

Since the in-vehicle ECUs 2a, 2b, 2c, 2d, 2e, 2f, 2g and 2h have the same configuration, they are collectively referred to as the in-vehicle ECU 2 below. Since the communication branch lines 51a, 51b, 51c, 51d, 51e, 51f, 51g, and 51h have the same configuration, they are also collectively referred to as the communication branch line 51 below. The in-vehicle ECU 2 is mounted on the vehicle C.

In-vehicle ECU2 is arranged in each area in vehicles C, for example. The in-vehicle ECU 2 is connected to an in-vehicle device 3 mounted on the vehicle C. As shown in FIG. The in-vehicle ECU 2 transmits and receives signals or data to and from the in-vehicle device 3 connected to the in-vehicle ECU 2 to control driving of the in-vehicle device 3 . Also, the in-vehicle ECU 2 communicates with the in-vehicle relay device 1 . The in-vehicle ECU 2 communicates with another in-vehicle ECU 2 via the in-vehicle relay device 1 .

The in-vehicle device 3 includes various sensors 30 such as LiDAR (Light Detection and Ranging), a light sensor, a CMOS camera, and an infrared sensor. The in-vehicle device 3 is not limited to the above example, and may include actuators such as a door opening/closing device and a motor device, switches such as a door SW (switch) and a lamp SW, and may include a lamp.

The in-vehicle ECU 2 performs drive control of the in-vehicle device 3 . For example, the in-vehicle ECU 2 connected to the sensor 30 acquires the detection value of the sensor 30 and transmits the acquired detection value to the in-vehicle ECU 2 connected to the in-vehicle device 3 such as an actuator via the in-vehicle relay device 1 . The in-vehicle ECU 2 connected to the in-vehicle device 3 such as an actuator controls the driving of the in-vehicle device 3 based on the transmitted detected value.

The in-vehicle relay device 1 is a relay device such as a gateway or ether switch that relays communication between a plurality of in-vehicle ECUs 2 . For example, the in-vehicle relay device 1a relays communication between the in-vehicle ECU 2a and the in-vehicle ECU 2b. Moreover, the in-vehicle relay device 1a cooperates with the in-vehicle relay device 1b to relay communication between the in-vehicle ECU 2a or the in-vehicle ECU 2b and the in-vehicle ECU 2c or the in-vehicle ECU 2d. The in-vehicle relay device 1 performs abnormality determination for the communication line 5 including the communication trunk line 50 and the communication branch line 51 .

The communication line 5 including the communication trunk line 50 and the communication branch line 51 is, for example, a wire harness compatible with the Ethernet communication protocol. In this embodiment, an example in which an Ethernet (registered trademark) communication protocol is used for communication will be described, but the communication protocol used for communication is not limited to Ethernet. For example, CAN (Controller Area Network), CAN-FD (Controller Are Network with Flexible Data rate), LIN (Local Interconnect Network), or FlexRay communication protocol may be used for communication.

FIG. 2 is a block diagram illustrating the internal configurations of the in-vehicle relay device 1 and the in-vehicle ECU 2. As shown in FIG. The in-vehicle relay device 1 includes a control section 10, a storage section 11, and communication sections 12a, 12b, 12c and 12d. The control unit 10, the storage unit 11, and the communication units 12a, 12b, 12c and 12d are connected. The control unit 10 is an arithmetic processing device such as a CPU (Central Processing Unit) or an MPU (Micro Processing Unit). The control unit 10 reads out and executes a program 110 and data stored in advance in the storage unit 11, thereby performing various control processing, arithmetic processing, and the like.

The storage unit 11 is composed of a volatile memory element such as a RAM (Random Access Memory), or a non-volatile memory element such as a ROM (Read Only Memory), an EEPROM (Electrically Erasable Programmable ROM), or a flash memory. The storage unit 11 stores in advance a program 110 executed by the control unit 10 and data referred to by the control unit 10 during processing. The program 110 stored in the storage unit 11 may be the program 110 read from the recording medium 4 readable by the in-vehicle relay device 1 . Alternatively, the program 110 may be downloaded from an external computer (not shown) connected to a communication network (not shown) and stored in the storage unit 11 .

The communication units 12 a , 12 b , 12 c and 12 d are input/output interfaces for communicating with in-vehicle equipment including the in-vehicle ECU 2 and other in-vehicle relay devices 1 . For example, the communication units 12a, 12b, 12c, and 12d are input/output interfaces using Ethernet communication protocols, and include Ethernet PHY units that support packets such as TCP/IP or UDP/IP.

As described above, one in-vehicle relay device 1 is connected to two in-vehicle ECUs 2 and two other in-vehicle relay devices 1 . One in-vehicle ECU 2 is connected to the communication unit 12a via a communication branch line 51 in FIG. The other in-vehicle ECU 2 is connected via a communication branch line 51 to the communication unit 12b. One other in-vehicle relay device 1 is connected to the communication unit 12c via the communication trunk line 50 . The other in-vehicle relay device 1 is connected to the communication unit 12d via the communication trunk line 50. As shown in FIG. Since the communication units 12a, 12b, 12c and 12d have the same configuration, they are collectively referred to as the communication unit 12 below. The control unit 10 communicates with the connected in-vehicle ECU 2 and other in-vehicle relay devices 1 via the communication unit 12 .

The in-vehicle ECU 2 includes a control section 20 , a storage section 21 , a communication section 22 and an input/output I/F (interface) 23 . The control unit 20, storage unit 21, communication unit 22 and input/output I/F 23 are connected. The control unit 20 is an arithmetic processing device such as a CPU or MPU. The control unit 20 reads and executes programs and data pre-stored in the storage unit 21 to perform various control processing, arithmetic processing, and the like.

The storage unit 21 is composed of a volatile memory element such as RAM, or a non-volatile memory element such as ROM, EEPROM, or flash memory. The storage unit 21 stores in advance programs executed by the control unit 20 and data referred to by the control unit 20 during processing.

The communication unit 22 is an input/output interface for communicating with the in-vehicle relay device 1 . For example, the communication unit 22 is an input/output interface using an Ethernet communication protocol and includes an Ethernet PHY unit. The communication section 22 is connected to the communication section 12 via a communication branch line 51 . The input/output I/F 23 is a communication interface for communicating with the in-vehicle device 3 . The input/output I/F 23 is connected to the in-vehicle device 3 .

The control unit 20 of the in-vehicle ECU 2 acquires a signal output from the in-vehicle device 3 connected to the own ECU by executing a program stored in the storage unit 21 of the own ECU, and generates a signal based on the signal. The obtained data is output to another in-vehicle ECU 2 via the in-vehicle relay device 1 and the communication line 5 . Further, the in-vehicle ECU 2 acquires data output from another in-vehicle ECU 2 via the in-vehicle relay device 1 and the communication line 5, and outputs a signal generated based on the data to the in-vehicle device 3 connected to the own ECU. , to drive and control the in-vehicle device 3 .

When an IG (ignition) switch (not shown) provided in the vehicle C is in an off state, the in-vehicle devices including the in-vehicle relay device 1 and the in-vehicle ECU 2 are in a rest state. The hibernation state includes a state in which functions are restricted in order to suppress power consumption. The hibernation state is a so-called sleep state. The hibernation state may include a state in which power is not supplied to the in-vehicle device, that is, a so-called power-off state. When the IG switch is on, the in-vehicle devices including the in-vehicle relay device 1 and the in-vehicle ECU 2 are in an activated state. The active state includes a state in which functions restricted in the hibernation state are not restricted.

When the in-vehicle relay device 1 and the in-vehicle ECU 2 are activated, the control unit 10 of each in-vehicle relay device 1 relays communication between the multiple in-vehicle ECUs 2 . For example, the storage unit 11 of each in-vehicle relay device 1 stores relay route information, a so-called routing table, used in performing relay processing for communication between the plurality of in-vehicle ECUs 2 . The control unit 10 relays communication based on the routing table stored in the storage unit 11 of its own device. An example in which the control unit 10 of the in-vehicle relay device 1a relays communication will be described below.

FIG. 3 is a conceptual diagram showing an example of contents of a routing table. The routing table of FIG. 3 shows an example of a routing table stored in the storage unit 11 of the in-vehicle relay device 1a. The routing table stores message IDs of messages used for communication between a plurality of in-vehicle ECUs 2, output destinations of the messages, and information on the output destinations in association with each other. The routing table includes a message ID column, an output destination column, and an output destination information column. More specifically, the message ID column stores message IDs of messages used for communication between a plurality of in-vehicle ECUs 2 . In the output destination column of FIG. 3, the in-vehicle relay device 1b, the in-vehicle relay device 1c, the in-vehicle ECU 2a, or the in-vehicle ECU 2b, which are the message output destinations, are stored as output destinations. In the output destination information string, information of the in-vehicle relay device 1 or the in-vehicle ECU 2 of the output destination, for example, an ID number assigned in advance to the in-vehicle relay device 1 and the in-vehicle ECU 2 is stored as the information of the output destination.

For example, the control unit 10 of the in-vehicle relay device 1a outputs the message of the message ID associated with the output destination of the in-vehicle ECU 2a to the in-vehicle ECU 2a based on the routing table stored in the storage unit 11 of the in-vehicle relay device 1a. That is, the controller 10 of the in-vehicle relay device 1a relays the message to the in-vehicle ECU 2a.

For example, based on the routing table stored in the storage unit 11 of the in-vehicle relay device 1a, the control unit 10 of the in-vehicle relay device 1a sends the message of the message ID associated with the output destination of the in-vehicle relay device 1b to the in-vehicle relay device 1b. Output. The control unit 10 of the in-vehicle relay device 1b outputs the message output from the in-vehicle relay device 1a to the in-vehicle ECU 2c or the in-vehicle ECU 2d based on the routing table stored in the storage unit 11 of the in-vehicle relay device 1b. That is, the control unit 10 of the in-vehicle relay device 1a relays the message to the in-vehicle ECU 2c or the in-vehicle ECU 2d in cooperation with the control unit 10 of the in-vehicle relay device 1b. Note that the control unit 10 of the in-vehicle relay device 1b may output the message output from the in-vehicle relay device 1a to the in-vehicle relay device 1d based on the routing table stored in the storage unit 11 of the in-vehicle relay device 1b.

The control unit 10 of the on-vehicle relay device 1 other than the on-vehicle relay device 1a relays communication in the same manner as the control unit 10 of the on-vehicle relay device 1a. Note that the routing table used by each in-vehicle relay device 1 may not be stored in the storage unit 11 of each in-vehicle relay device 1 . For example, the routing table used by each in-vehicle relay device 1 may be collectively stored in the storage unit 11 of any one of the four in-vehicle relay devices 1 .

The communication state of the communication line 5 includes an active state in which communication via the communication line 5 is performed and an inactive state in which communication via the communication line 5 is not performed. An inactive state includes, for example, a state in which the communication traffic on the communication line 5 is zero. An active state includes, for example, a state in which the communication traffic on the communication line 5 is non-zero. For example, when the in-vehicle relay device 1a and the in-vehicle relay device 1b relay communication between the in-vehicle ECU 2a and the in-vehicle ECU 2c, communication is performed via the communication branch line 51a, the communication trunk line 50a, and the communication branch line 51c. At this time, the communication state of the communication branch line 51a, the communication state of the communication trunk line 50a, and the communication state of the communication branch line 51c are each in an active state. For example, when the in-vehicle relay device 1a and the in-vehicle ECU 2b are not communicating, the communication state of the communication branch line 51b is inactive. The case where the in-vehicle relay device 1a and the in-vehicle ECU 2b are not communicating includes, for example, the case where the in-vehicle ECU 2b is in a hibernation state.

The control unit 10 of the in-vehicle relay device 1 performs abnormality determination for the communication line 5 whose communication state is inactive. The abnormality determination performed by the controller 10 of the in-vehicle relay device 1 will be described below. When the IG switch turns from ON to OFF, the controller 10 of the in-vehicle relay device 1 outputs a sleep signal and determines whether the communication line 5 connected to the in-vehicle relay device 1 is abnormal. After executing the abnormality determination, the in-vehicle relay device 1 transitions from the active state to the sleep state. The sleep signal is a signal for causing the in-vehicle equipment including the other in-vehicle relay device 1 and the in-vehicle ECU 2 to transition from the active state to the hibernation state.

For example, when the IG switch turns from ON to OFF, the controller 10 of the in-vehicle relay device 1a outputs a sleep signal to the in-vehicle ECU 2a and the in-vehicle ECU 2b. The in-vehicle ECU 2a and the in-vehicle ECU 2b transition from the active state to the hibernation state by receiving the output sleep signal. Communication is not performed between the in-vehicle ECU 2a and the in-vehicle ECU 2b that have transitioned to the hibernation state and the in-vehicle relay device 1a. Therefore, the control unit 10 of the in-vehicle relay device 1a outputs a sleep signal to the in-vehicle ECU 2a and the in-vehicle ECU 2b, thereby changing the communication state of the communication branch lines 51a and 51b from the active state to the inactive state.

After outputting a sleep signal to the in-vehicle ECU 2a and the in-vehicle ECU 2b, the control unit 10 of the in-vehicle relay device 1a performs abnormality determination for the communication branch lines 51a and 51b. The abnormality determination performed by the controller 10 of the in-vehicle relay device 1 in this embodiment is based on the measurement result of the specific impedance of the communication line 5 . For example, the controller 10 of the in-vehicle relay device 1 performs abnormality determination using TDR (Time domain reflectometry). Since TDR is a well-known technique, detailed description is omitted. The control unit 10 can accurately detect abnormalities such as disconnection and poor contact in the communication branch lines 51a and 51b. Note that the method of determining abnormality is not limited to TDR. The control unit 10 may perform an abnormality determination by a response confirmation test using a PING command defined by TCP/IP, for example. The control unit 10 of the in-vehicle relay device 1a stores the determination result of the abnormality determination in the storage unit 11 of the in-vehicle relay device 1a. The determination result includes whether or not there is an abnormality in the communication branch line 51a and whether or not there is an abnormality in the communication branch line 51b.

The control unit 10 of the in-vehicle relay device 1a outputs a sleep signal to the in-vehicle relay device 1b and the in-vehicle relay device 1c in addition to the in-vehicle ECU 2a and the in-vehicle ECU 2b. Upon receiving the output sleep signal, the in-vehicle relay device 1b and the in-vehicle relay device 1c make an abnormality determination as described later, and then transition from the active state to the sleep state. Since communication is not performed between the in-vehicle relay device 1a and the in-vehicle relay device 1b and the in-vehicle relay device 1c, the communication state of the communication trunk lines 50a and 50b transitions from the active state to the inactive state. After outputting the sleep signal to the in-vehicle relay device 1b and the in-vehicle relay device 1c, the controller 10 of the in-vehicle relay device 1a judges the communication trunk line 50a and the communication trunk line 50b as described above. The control unit 10 of the in-vehicle relay device 1a stores the determination result of the abnormality determination in the storage unit 11 of the in-vehicle relay device 1a. The determination result includes whether or not there is an abnormality in the communication trunk line 50a and whether or not there is an abnormality in the communication trunk line 50b. The in-vehicle relay device 1a transitions from the activated state to the idle state.

When receiving the sleep signal output from the in-vehicle relay device 1a, the controller 10 of the in-vehicle relay device 1b outputs the sleep signal to the in-vehicle ECU 2c, the in-vehicle ECU 2d, and the in-vehicle relay device 1d. Similarly to the control unit 10 of the in-vehicle relay device 1a, after outputting the sleep signal, the control unit 10 of the in-vehicle relay device 1b performs an abnormality determination on the communication branch line 51c, the communication branch line 51d, and the communication trunk line 50c. The determination result is stored in the storage unit 11 of the in-vehicle relay device 1b. The in-vehicle relay device 1b transitions from the activated state to the idle state.

When receiving the sleep signal output from the in-vehicle relay device 1a, the controller 10 of the in-vehicle relay device 1c outputs the sleep signal to the in-vehicle ECU 2e and the in-vehicle ECU 2f. Similarly to the control unit 10 of the in-vehicle relay device 1a, after outputting the sleep signal, the control unit 10 of the in-vehicle relay device 1c performs an abnormality determination on the communication branch line 51e, the communication branch line 51f, and the communication trunk line 50d. The determination result is stored in the storage unit 11 of the in-vehicle relay device 1c. The in-vehicle relay device 1c transitions from the activated state to the idle state. The controller 10 of the in-vehicle relay device 1c may output a sleep signal to the in-vehicle relay device 1d.

When the control unit 10 of the in-vehicle relay device 1d receives the sleep signal output from the in-vehicle relay device 1b or the in-vehicle relay device 1c, it outputs the sleep signal to the in-vehicle ECU 2g and the in-vehicle ECU 2h. Similarly to the control unit 10 of the in-vehicle relay device 1a, after outputting the sleep signal, the control unit 10 of the in-vehicle relay device 1d performs abnormality determination on the communication branch lines 51g and 51h, and outputs the determination result of the abnormality determination to the vehicle-mounted relay device. Stored in the storage unit 11 of the relay device 1d. The in-vehicle relay device 1d transitions from the activated state to the idle state. In addition, when the IG switch is turned off from the on state, the control unit 10 of the on-vehicle relay device 1 other than the on-vehicle relay device 1a may output a sleep signal to the on-vehicle device connected to the own device.

When the IG switch is turned on from an off state, the in-vehicle relay device 1 transitions from a sleep state to a start state. When the in-vehicle relay device 1 transitions to the activated state, the control unit 10 of the in-vehicle relay device 1 outputs an activation signal and an output indicating that there is an abnormality in the communication line 5 based on the determination result of the abnormality determination. Predetermined processing including Specifically, when the in-vehicle relay device 1 transitions to the activated state, the control unit 10 refers to the determination result of the abnormality determination stored in the storage unit 11, and the communication line 5 connected to the in-vehicle relay device 1 Determine the presence or absence of an abnormality in When there is no abnormality in the communication line 5 connected to its own device, the control unit 10 outputs a start signal to the in-vehicle ECU 2 and other in-vehicle relay devices 1 connected to its own device via the communication line 5 . The activation signal is a signal for causing the in-vehicle equipment including the in-vehicle ECU 2 and the other in-vehicle relay device 1 to transition from the hibernation state to the activation state.

When there is an abnormality in the communication line 5 connected to the device itself, the control section 10 outputs that the communication line 5 is abnormal. For example, the control unit 10 outputs to a display unit such as a display of a navigation system provided in the vehicle C that there is an abnormality in the communication line 5 . The control unit 10 may output to the portable terminal possessed by the driver of the vehicle C that there is an abnormality in the communication line 5 via a wireless communication device (not shown). Further, the control unit 10 may output to an external server (not shown) provided outside the vehicle C that there is an abnormality in the communication line 5 via an external communication device (not shown) such as a TCU (Telematics Communication Unit). The control unit 10 may output information indicating that the communication line 5 is abnormal and information about the communication line 5 with the abnormality, such as an ID number assigned to each communication trunk line 50 and each communication branch line 51 .

An example in which the in-vehicle relay device 1a transitions from the sleep state to the active state when the IG switch is turned on from the off state will be described below. When the in-vehicle relay device 1a transitions to the activated state, the control unit 10 of the in-vehicle relay device 1a refers to the determination result stored in the storage unit 11 of the in-vehicle relay device 1a, and the communication trunk line 50a, the communication trunk line 50b, The presence or absence of abnormality in the communication branch line 51a and the communication branch line 51b is determined. When at least one of the communication trunk line 50a, the communication trunk line 50b, the communication branch line 51a, and the communication branch line 51b has an abnormality, the controller 10 of the in-vehicle relay device 1a outputs that the communication line 5 has an abnormality.

When there is no abnormality in the communication trunk line 50a, the communication trunk line 50b, the communication branch line 51a, and the communication branch line 51b, the control unit 10 of the in-vehicle relay device 1a sends a start signal to the other in-vehicle relay device 1 and the in-vehicle ECU 2 connected to the own device. Output via the communication unit 12 and the communication line 5 . Specifically, the controller 10 of the in-vehicle relay device 1a outputs a start signal to the in-vehicle relay device 1b, the in-vehicle relay device 1c, the in-vehicle ECU 2a, and the in-vehicle ECU 2b. The in-vehicle relay device 1b, the in-vehicle relay device 1c, the in-vehicle ECU 2a, and the in-vehicle ECU 2b transition from the hibernation state to the activation state by receiving the output activation signal.

When the in-vehicle relay device 1b transitions from the hibernation state to the active state, the control unit 10 of the in-vehicle relay device 1b refers to the determination result stored in the storage unit of the in-vehicle relay device 1b, and The presence or absence of abnormality in the communication branch line 51d is determined. When at least one of the communication trunk line 50c, the communication branch line 51c, and the communication branch line 51d has an abnormality, the controller 10 of the in-vehicle relay device 1b outputs that the communication line 5 has an abnormality. When there is no abnormality in the communication main line 50c, the communication branch line 51c, and the communication branch line 51d, the control unit 10 of the in-vehicle relay device 1b outputs a start signal to the in-vehicle relay device 1d, the in-vehicle ECU 2c, and the in-vehicle ECU 2d. The ECU 2c and the in-vehicle ECU 2d are changed from the hibernation state to the activation state.

When the in-vehicle relay device 1c transitions from the sleep state to the active state, the control unit 10 of the in-vehicle relay device 1c refers to the determination result stored in the storage unit of the in-vehicle relay device 1c, and The presence or absence of abnormality in the communication branch line 51f is determined. When at least one of the communication trunk line 50d, the communication branch line 51e, and the communication branch line 51f has an abnormality, the controller 10 of the in-vehicle relay device 1c outputs that the communication line 5 has an abnormality. When there is no abnormality in the communication main line 50d, the communication branch line 51e, and the communication branch line 51f, the control unit 10 of the in-vehicle relay device 1b outputs a start signal to the in-vehicle ECU 2e and the in-vehicle ECU 2f, and changes the in-vehicle ECU 2e and the in-vehicle ECU 2f from the sleep state to the start state. transition to If there is no abnormality in the communication line 5 connected to the in-vehicle relay device 1c, the controller 10 of the in-vehicle relay device 1c may output a start signal to the in-vehicle relay device 1d.

When the in-vehicle relay device 1d transitions from the sleep state to the activated state, the control unit 10 of the in-vehicle relay device 1d refers to the determination result stored in the storage unit of the in-vehicle relay device 1d, and determines whether the communication branch lines 51g and 51h Determine the presence or absence of anomalies. If at least one of the communication branch lines 51g and 51h has an abnormality, the controller 10 of the in-vehicle relay device 1d outputs that the communication line 5 has an abnormality. When there is no abnormality in the communication branch line 51g and the communication branch line 51h, the control unit 10 of the in-vehicle relay device 1d outputs a start signal to the in-vehicle ECU 2g and the in-vehicle ECU 2h to cause the in-vehicle ECU 2g and the in-vehicle ECU 2h to transition from the sleep state to the start state.

Note that when the IG switch is changed from the off state to the on state, the in-vehicle relay devices 1 other than the in-vehicle relay device 1a may transition from the hibernation state to the active state, and the plurality of in-vehicle relay devices 1 may transition from the hibernation state to the active state. You can transition.

In the present embodiment, the determination result of the abnormality determination performed by the control unit 10 of one in-vehicle relay device 1 is stored in the storage unit 11 of the one in-vehicle relay device 1 . The storage unit 11 corresponds to a predetermined storage area that can be accessed from its own device. For example, the determination result of the abnormality determination performed by the control unit 10 of each in-vehicle relay device 1 may be collectively stored in the storage unit 11 of one of the plurality of in-vehicle relay devices 1 . In this case, the storage unit 11 of one of the in-vehicle relay devices 1 corresponds to a predetermined storage area that can be accessed from its own device. Each of the control units 10 of the plurality of in-vehicle relay devices 1 communicates and refers to the determination result stored in the storage unit 11 of any one of the in-vehicle relay devices 1 described above.

The control unit 10 may output the determination result to an external server (not shown) and store the determination result in the storage unit of the external server. In this case, the storage unit of the external server corresponds to a predetermined storage area accessible from the own device. The storage unit of the external server is composed of, for example, a volatile memory element such as RAM, or a non-volatile memory element such as ROM, EEPROM, or flash memory. The control unit 10 communicates with the external server and refers to the determination result stored in the storage unit of the external server.

In this embodiment, two communication trunk lines 50 are connected to each in-vehicle relay device 1 . The four in-vehicle relay devices 1 are connected in a ring by a communication trunk line 50 . In relaying communication via a plurality of in-vehicle relay devices 1, communication can be relayed using a plurality of relay paths, so redundancy can be achieved in relaying communication. For example, when the communication between the in-vehicle ECU 2a and the in-vehicle ECU 2g is relayed, the communication relay includes a relay route through the in-vehicle relay devices 1a, 1b and 1d, the communication main lines 50a and 50c, and the communication branch lines 51a and 51g. Used. Alternatively, relay paths through the in-vehicle relay devices 1a, 1c and 1d, the communication trunk lines 50b and 50d, and the communication branch lines 51a and 51g are used for relaying the above communication.

Even if one of the four communication trunk lines 50 has an abnormality, the in-vehicle relay device 1 can relay the communication of the plurality of in-vehicle ECUs 2 through a relay route that does not pass through the communication trunk line 50 with the abnormality. can. For example, when one communication trunk line 50 has an abnormality, the control unit 10 of the in-vehicle relay device 1 switches the routing table to be referred to the abnormal routing table to be referred to when the communication trunk line 50 has an abnormality. The abnormal routing table is stored in the storage unit 11 in advance. For example, the abnormal routing table includes a routing table for relay routes that do not pass through the communication trunk line 50a and a routing table for relay routes that do not pass through the communication trunk line 50b. The abnormal routing table includes a routing table for relay routes that do not pass through the communication trunk line 50c and a routing table for relay routes that do not pass through the communication trunk line 50d. Hereinafter, a routing table that is referred to when there is no abnormality in the communication trunk 50, such as the routing table in FIG. 3, is also referred to as a normal routing table.

The method by which the in-vehicle relay device 1 relays communication through a relay route that does not pass through the communication trunk line 50 with an abnormality is not limited to switching the routing table. The in-vehicle relay device 1 may change the output destination stored in the normal routing table according to the communication trunk line 50 having an abnormality.

FIG. 4 is a flowchart exemplifying processing related to communication line abnormality detection performed by the control unit 10 of the in-vehicle relay device 1 . For example, when the IG switch is turned on from an off state, the control unit 10 performs the following processing. Hereinafter, the step is abbreviated as S.

The control unit 10 of the in-vehicle relay device 1 determines whether or not the IG switch has changed from the ON state to the OFF state (S11). If the IG switch has not changed from the ON state to the OFF state (S11: NO), the control unit 10 performs loop processing to perform the determination of S11 again. In performing the loop processing, the control unit 10 may perform standby processing for a predetermined time.

When the IG switch is turned off from the ON state (S11: YES), the control unit 10 sleeps to the in-vehicle ECU 2 and the other in-vehicle relay device 1 connected to the own device via the communication line 5 as described above. A signal is output (S12). The in-vehicle ECU 2 and the other in-vehicle relay device 1 transition from the active state to the rest state. As described above, the control unit 10 executes abnormality determination for the communication trunk line 50 and the communication branch line 51 connected to its own device (S13). More specifically, the control unit 10 performs an abnormality determination on a communication trunk line 50 connecting its own device and the other in-vehicle relay device 1 and a communication branch line 51 connecting its own device and the in-vehicle ECU 2 . As described above, the control unit 10 stores the determination result of the executed abnormality determination in the storage unit 11 (S14). The in-vehicle relay device 1 transitions from the active state to the rest state.

The control unit 10 determines whether or not the IG switch has changed from the OFF state to the ON state (S15). If the IG switch has not changed from the OFF state to the ON state (S15: NO), the control unit 10 performs loop processing to perform the determination of S15 again. In performing the loop processing, the control unit 10 may perform standby processing for a predetermined time.

When the IG switch is turned on from the off state (S15: YES), the control unit 10 refers to the determination result stored in the storage unit 11 (S16), and the communication trunk line 50 connected to the own device and the communication It is determined whether or not there is an abnormality in at least one of the branch lines 51 (S17). If at least one of the communication trunk line 50 and the communication branch line 51 is abnormal (S17: YES), the control unit 10 outputs that the communication line 5 is abnormal as described above (S18), and terminates the process. When there is an abnormality in the communication trunk line 50, the control unit 10 may switch the routing table to be referred to the abnormality routing table, and start relaying the communication of the plurality of in-vehicle ECUs 2 based on the abnormality routing table.

When there is no abnormality in the communication trunk line 50 and the communication branch line 51 (S17: NO), the control unit 10 controls the in-vehicle ECU 2 and other in-vehicle relay devices connected to the device itself via the communication trunk line 50 and the communication branch line 51. 1 (S19). The in-vehicle ECU 2 and the other in-vehicle relay device 1 transition from the sleep state to the active state. The control unit 10 starts relaying communication of the plurality of in-vehicle ECUs 2 based on the normal routing table, and ends the process.

In this embodiment, when the communication state of the communication line 5 is inactive, the control unit 10 determines that the communication line 5 is abnormal. Since the communication line 5 is not used for communication at the time of the abnormality determination, the in-vehicle relay device 1 can appropriately determine the abnormality of the communication line. For example, abnormality determination cannot be performed for the communication line 5 used for communication. Alternatively, the accuracy of abnormality determination performed on the communication line 5 used for communication is lower than the accuracy of abnormality determination performed on the communication line 5 not used for communication.

When the in-vehicle relay device 1 transitions from the active state to the sleep state, the control unit 10 outputs a sleep signal to the in-vehicle equipment including the in-vehicle ECU 2 and other in-vehicle relay device 1 connected to the own device, and determines an abnormality with respect to the communication line. I do. Since the in-vehicle device transitions from the active state to the sleep state by receiving the sleep signal, the state of the communication line 5 connecting the in-vehicle device receiving the sleep signal and the in-vehicle relay device 1 changes from the active state to the inactive state. Transition. After outputting the sleep signal, the control unit 10 determines whether the communication line 5 is abnormal. Therefore, it is possible to determine whether the communication line 5 is in an inactive state.

The determination result of the abnormality determination performed when the in-vehicle relay device 1 transitions from the activated state to the idle state is stored in a predetermined storage area such as the storage unit 11 . When the in-vehicle relay device 1 transitions from the sleep state to the active state, the control unit 10 performs predetermined processing based on the determination result stored in the storage unit 11 . For example, when there is no abnormality in the communication line 5, the control unit 10 outputs a start signal to the in-vehicle device connected to its own device and starts relaying communication. Since the control unit 10 refers to the determination result stored in the storage unit 11 when the in-vehicle relay device 1 transitions from the hibernation state to the active state, the in-vehicle relay device 1 can change from the hibernation state to the active state. It is possible to determine whether or not there is an abnormality in the communication line 5 more quickly than when performing an abnormality determination. Since the in-vehicle relay device 1 can start relaying communication earlier than in the above case, control of the vehicle C can be started earlier. That is, the vehicle C can be started quickly.

When there is an abnormality in the communication line 5, the control unit 10 outputs the fact that there is an abnormality in the communication line 5 to, for example, a display unit provided in the vehicle C or a portable terminal carried by the driver of the vehicle C. The driver can be notified that there is an abnormality in the communication line 5. - 特許庁

In this embodiment, since the Ethernet communication protocol is used for communication, fast communication can be performed. An abnormality in the communication line 5 is determined based on the measurement result of the specific impedance of the communication line 5, for example, by TDR. By using the TDR, it is possible to accurately determine abnormalities in the communication line 5 such as disconnection and poor contact.

In this embodiment, the vehicle C is equipped with four in-vehicle relay devices and eight in-vehicle ECUs 2, but the number of in-vehicle relay devices 1 and the number of in-vehicle ECUs 2 are not limited to the above examples. For example, when one in-vehicle relay device 1 is mounted in a vehicle C, a plurality of in-vehicle ECUs 2 mounted in the vehicle C are connected to the in-vehicle relay device 1 . Although two vehicle-mounted ECUs 2 are connected to one vehicle-mounted relay device 1 in FIG.

The in-vehicle relay device 1 may be an integrated ECU, which is a central control device such as a vehicle computer. The integrated ECU is connected to a plurality of in-vehicle ECUs 2 via communication lines 5, and also functions as a relay device such as a gateway or ether switch that relays communication between the connected plurality of in-vehicle ECUs 2.

(Embodiment 2)
In the configuration according to the second embodiment, the same components as in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. Embodiment 2 relates to an in-vehicle relay device 1 that performs abnormality determination based on a communication state table described later in which the communication state of the communication line 5 is stored.

The storage unit 11 of the in-vehicle relay device 1 of Embodiment 2 stores a communication state table in which the communication state of the communication line 5 connected to the own device is stored. The control unit 10 of the in-vehicle relay device 1 of the second embodiment controls the communication state of the communication line 5 connected to the own device based on the state of the in-vehicle equipment including the in-vehicle ECU 2 and the other in-vehicle relay device 1 connected to the own device. is determined and the communication status table is updated. The control unit 10 identifies the communication line 5 in the inactive state based on the updated communication state table, and performs abnormality determination for the identified inactive communication line 5 .

The state of the in-vehicle device includes an active state and a hibernation state. The active state includes a busy state in which the vehicle-mounted device is performing processing such as communication, and a suspended state in which the vehicle-mounted device is not performing processing such as communication. The suspended state includes a state in which communication is possible and communication traffic is zero. For example, the sensor 30 includes a forward camera that captures images when the vehicle C moves forward and a reverse camera that captures images when the vehicle C moves backward. Since the forward camera operates when the vehicle C is moving forward, the in-vehicle ECU 2 connected to the forward camera performs processing such as communication. At this time, the in-vehicle ECU 2 connected to the forward camera is in a busy state. Since the reverse camera does not operate while the vehicle is moving forward, the in-vehicle ECU 2 connected to the reverse camera does not perform processing such as communication. At this time, the in-vehicle ECU 2 connected to the reverse camera is in a suspended state.

Note that the in-vehicle ECU 2 may transition from the active state to the sleep state when the in-vehicle device 3 connected to the own ECU is not driven. For example, the in-vehicle ECU 2 outputs to the in-vehicle relay device 1 connected to its own ECU, when transitioning to the resting state, that it will transition to the resting state.

FIG. 5 is a conceptual diagram showing an example of contents of a communication state table. In the communication state table, the communication line 5, the communication state of the communication line 5, the vehicle-mounted device connected to the communication line 5, and the state of the vehicle-mounted device are stored in association with each other. FIG. 5 shows a communication status table relating to the in-vehicle relay device 1a as an example of the communication status table. A communication state table relating to the in-vehicle relay device 1a is stored, for example, in the storage unit 11 of the in-vehicle relay device 1a.

The communication status table includes a communication line column, a communication status column, an in-vehicle equipment column, and an in-vehicle equipment status column. The communication line column of the communication state table in FIG. 5 stores the communication line 5 connected to the in-vehicle relay device 1a. For example, information on the communication line 5 connected to the in-vehicle relay device 1a may be stored in the communication line string. The information of the communication line 5 is, for example, an ID number that can uniquely identify each communication trunk line 50 and each communication branch line 51 . The ID number is assigned in advance to each communication trunk line 50 and each communication branch line 51, for example. The communication line 5 connected to the in-vehicle relay device 1a includes a communication trunk line 50a, a communication trunk line 50b, a communication branch line 51a, and a communication branch line 51b. In the communication state column, the communication state of the communication line 5 is stored as an active state or a non-active state.

In the on-vehicle equipment column, the on-vehicle equipment connected to the on-vehicle repeater 1a via the communication line 5 is stored. The in-vehicle equipment connected to the in-vehicle relay device 1a includes the in-vehicle relay device 1b, the in-vehicle relay device 1c, the in-vehicle ECU 2a, and the in-vehicle ECU 2b. For example, the on-vehicle device column may store information on on-vehicle devices connected to the on-vehicle relay device 1a. The information on the vehicle-mounted device is, for example, an ID number that can uniquely identify each vehicle-mounted relay device 1 and each vehicle-mounted ECU 2 . The ID number is assigned in advance to each in-vehicle relay device 1 and each in-vehicle ECU 2, for example. Busy state, suspend state, or dormant state is stored in the on-vehicle device state column as the state of the on-vehicle device.

The control unit 10 of the in-vehicle relay device 1a updates the communication state table stored in the storage unit 11 of the in-vehicle relay device 1a. Specifically, the control unit 10 of the in-vehicle relay device 1a updates the state of the in-vehicle device stored in the communication state table, and according to the updated state of the in-vehicle device, communicates with the communication line 5 stored in the communication state table. Update status.

For example, when the control unit 10 of the in-vehicle relay device 1a receives a transition to the hibernation state output from the in-vehicle ECU 2, it updates the state of the in-vehicle device in the in-vehicle ECU 2 to the hibernation state in the communication state table. When outputting the activation signal to the in-vehicle ECU 2, the control unit 10 of the in-vehicle relay device 1a updates the state of the in-vehicle device in the in-vehicle ECU 2 from the sleep state to the busy state or the suspend state in the communication state table. For example, the control unit 10 of the in-vehicle relay device 1a updates the state of the in-vehicle device connected to the communication line 5 based on the communication traffic on the connected communication line 5 in the communication state table. The control unit 10 updates the state of the on-vehicle device connected to the communication line 5 whose communication traffic is 0 to the suspended state, and changes the state of the on-vehicle device connected to the communication line 5 whose communication traffic is not 0 to the busy state. update to

Since the vehicle-mounted device in the busy state communicates with the vehicle-mounted relay device 1a, the control unit 10 of the vehicle-mounted relay device 1a changes the communication state of the communication line 5 connected to the vehicle-mounted device in the busy state to the active state in the communication state table. update to Since the vehicle-mounted device in the suspended state or hibernating state does not communicate with the in-vehicle relay device 1a, the control unit 10 of the in-vehicle relay device 1a is connected to the vehicle-mounted device in the suspended state or hibernating state in the communication state table. The communication state of the communication line 5 is updated to the inactive state. Hereinafter, updating the communication state of the communication line 5 stored in the communication state table is also referred to as updating the communication state table. The storage unit 11 corresponds to a predetermined storage area that can be accessed from its own device.

In this embodiment, the Ethernet communication protocol is used for communication. Generally, when the Ethernet communication protocol is used, the in-vehicle relay device 1 and one on-vehicle device are connected by one communication line 5 corresponding to the Ethernet communication protocol, so the communication state of the communication line 5 can be easily determined.

The control unit 10 of the in-vehicle relay device 1a identifies the inactive communication line 5 based on the updated communication state table, and performs abnormality determination for the identified inactive communication line 5. FIG. Specifically, the control unit 10 of the in-vehicle relay device 1a refers to the communication state table and determines whether or not there is a communication line 5 whose communication state is inactive, which is stored in the communication state table. When there is an inactive communication line 5, the controller 10 of the in-vehicle relay device 1a performs abnormality determination on the inactive communication line 5 in the same manner as in the first embodiment. When the communication line 5 is abnormal, the controller 10 of the in-vehicle relay device 1a outputs that the communication line 5 is abnormal, as in the first embodiment. Hereinafter, the communication line 5 whose communication state is in the inactive state is also referred to as the communication line 5 in the inactive state.

Similarly to the control unit 10 of the in-vehicle relay device 1a, the control unit 10 of the in-vehicle relay device 1 other than the in-vehicle relay device 1a also updates the communication state table stored in the storage unit 11 of its own device, and updates the updated communication state. The inactive communication line 5 is identified based on the table. Furthermore, the control unit 10 described above performs an abnormality determination for the specified inactive communication line 5 . For example, the communication state table storing the communication state of each communication main line 50 and each communication branch line 51 mounted on the vehicle C is stored in the storage unit 11 of any one of the four on-vehicle relay devices 1 . may be stored in The control unit 10 of each in-vehicle relay device 1 communicates to update and refer to the communication state table stored in the storage unit 11 described above. In this case, the storage unit 11 of any one of the in-vehicle relay devices 1 corresponds to a predetermined storage area accessible from the own device. The communication state table may be configured such that each communication trunk line 50 and each communication branch line 51 are identified by an ID number assigned to each in-vehicle relay device 1 and each in-vehicle ECU 2 .

As in the first embodiment, the control unit 10 may output a sleep signal when the IG switch changes from the ON state to the OFF state, and perform abnormality determination for the communication line 5 . For example, although the determination result of abnormality determination and the communication state table are stored in the storage unit 11, they may be stored in different storage areas.

FIG. 6 is a flowchart illustrating processing related to abnormality determination processing performed by the control unit 10 of the second embodiment. For example, when the IG switch is turned on from an off state, the control unit 10 performs the following processing. For example, the control unit 10 performs processing related to communication relay and the following processing in parallel.

The control unit 10 updates the communication state table as described above (S31). The control unit 10 refers to the communication state table and determines whether or not there is a communication line 5 whose communication state is inactive state stored in the communication state table (S32). If there is no communication line 5 whose communication state is inactive (S32: NO), the control unit 10 performs the processing of S31.

If there is a communication line 5 whose communication state is inactive (S32: YES), the control unit 10 executes abnormality determination for the communication line 5 in an inactive state as described above (S33). The control unit 10 determines whether or not there is an abnormality in the communication line 5 for which the abnormality determination has been performed (S34). If there is no abnormality in the communication line 5 (S34: NO), the control section 10 terminates the process. The control unit 10 may perform the process of S31 instead of ending the process.

If there is an abnormality in the communication line 5 (S34: YES), the control unit 10 outputs that there is an abnormality in the communication line 5 (S35), and terminates the process. For example, when there is an abnormality in one communication trunk 50, the control unit 10 of the in-vehicle relay device 1 switches the routing table to be referred to and relays communication through a relay route that does not go through the communication trunk 50 with the abnormality, as in the first embodiment. may be performed.

In the present embodiment, the control unit 10 performs an abnormality determination for a communication line whose communication state is inactive based on a communication state table that stores the communication state of each communication line 5 . Since the control unit 10 performs abnormality determination based on the communication state table, it is possible to efficiently perform abnormality determination for the communication lines 5 even when a plurality of communication lines 5 are connected to the in-vehicle relay device.

The control unit 10 updates the communication status of the communication lines 5 stored in the communication status table according to the status of the in-vehicle equipment connected to each communication line 5 . When the state of the vehicle-mounted device is busy, the communication state of the communication line 5 connecting the vehicle-mounted device and the vehicle-mounted repeater 1 is updated to the active state in the communication state table. When the state of the vehicle-mounted device is in the suspended state or hibernation state, the communication state of the communication line 5 connecting the vehicle-mounted device and the vehicle-mounted relay device 1 is updated to the inactive state in the communication state table. The control unit 10 can perform abnormality determination for the communication line 5 according to the state of the vehicle-mounted device connected to its own device.

(Embodiment 3)
In the configuration according to the third embodiment, the same components as in the first embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. Embodiment 3 relays communication using a communication trunk line 50 other than one communication trunk line 50 among a plurality of communication trunk lines 50 connected to its own device and a communication branch line 51 connected to its own device, The present invention relates to an in-vehicle relay device 1 that performs abnormality determination for one communication trunk line 50 .

Two communication trunk lines 50 are connected to each in-vehicle relay device 1 of the third embodiment as in the first embodiment. The four in-vehicle relay devices 1 are connected in a ring by a communication trunk line 50 . The in-vehicle system S can use a plurality of relay routes in relaying communications via a plurality of in-vehicle relay devices 1 . For example, the in-vehicle relay device 1a communicates between the in-vehicle ECU 2a or 2b and the in-vehicle ECU 2c, 2d, 2e, 2f, 2g or 2h via the communication trunk line 50a and at least one of the in-vehicle relay devices 1b, 1c and 1d. to relay. Further, the in-vehicle relay device 1a performs communication between the in-vehicle ECU 2a or 2b and the in-vehicle ECU 2c, 2d, 2e, 2f, 2g or 2h via the communication trunk line 50b and at least one of the in-vehicle relay devices 1b, 1c and 1d. Relay. In other words, the in-vehicle relay device 1a can use a route through the communication trunk line 50a and a route through the communication trunk line 50b in relaying communications via a plurality of in-vehicle relay devices 1. FIG. Redundancy is provided in the relay of communication.

The control unit 10 of the in-vehicle relay device 1a of the third embodiment relays communication through a path through one of the two communication trunk lines 50 connected to its own device, and transmits to the other of the two communication trunk lines 50 anomaly judgment is performed. For example, the control unit 10 of the in-vehicle relay device 1a relays communication using one of the communication trunk line 50a and the communication trunk line 50b, and determines whether the other of the communication trunk line 50a and the communication trunk line 50b is abnormal. .

For example, the storage unit 11 of the in-vehicle relay device 1 stores a determination routing table for performing abnormality determination. FIG. 7 is a conceptual diagram showing an example of the content of the determination routing table. The determination routing table includes a first determination table and a second determination table. The first determination table is a routing table that is referred to when one of the two communication trunk lines 50 connected to one in-vehicle relay device 1 is determined to be abnormal. The second determination table is a routing table that is referenced when an abnormality determination is made for the other of the two communication trunk lines 50 connected to one in-vehicle relay device 1 .

The determination routing table of FIG. 7 shows an example of the determination routing table stored in the storage unit 11 of the in-vehicle relay device 1a. The first determination table in FIG. 7 is a routing table that the controller 10 of the in-vehicle relay device 1a refers to when performing abnormality determination on the communication trunk line 50b. Similar to the routing table of the first embodiment, the first determination table stores message IDs of messages used for communication between a plurality of in-vehicle ECUs 2, output destinations of the messages, and information on the output destinations in association with each other. It is

The first determination table includes a message ID column, an output destination column, and an output destination information column. More specifically, the message ID column stores message IDs of messages used for communication between a plurality of in-vehicle ECUs 2 . In the output destination column, the in-vehicle relay device 1b, the in-vehicle ECU 2a, or the in-vehicle ECU 2b, which is the output destination of the message, is stored as the output destination. In the information column of the output destination, as the information of the output destination, the information of the in-vehicle relay device 1b, the in-vehicle ECU 2a, or the in-vehicle ECU 2b of the output destination, for example, the ID number assigned in advance to the in-vehicle relay device 1b, the in-vehicle ECU 2a, and the in-vehicle ECU 2b. remembered. In relaying communication based on the first determination table, the communication trunk line 50a is used, but the communication trunk line 50b is not used.

The second determination table in FIG. 7 is a routing table that the controller 10 of the in-vehicle relay device 1a refers to when determining an abnormality with respect to the communication trunk line 50a. Similar to the routing table of the first embodiment, the second determination table stores message IDs of messages used for communication between a plurality of in-vehicle ECUs 2, message output destinations, and output destination information in association with each other. It is

The second determination table includes a message ID column, an output destination column, and an output destination information column. More specifically, the message ID column stores message IDs of messages used for communication between a plurality of in-vehicle ECUs 2 . In the output destination column, the in-vehicle relay device 1c, the in-vehicle ECU 2a, or the in-vehicle ECU 2b, which is the output destination of the message, is stored as the output destination. In the output destination information string, information of the in-vehicle relay device 1c, the in-vehicle ECU 2a, or the in-vehicle ECU 2b of the output destination, for example, the ID number assigned in advance to the in-vehicle relay device 1c, the in-vehicle ECU 2a, and the in-vehicle ECU 2b is included as the information of the output destination. remembered. In relaying the communication performed based on the second determination table, the communication trunk line 50b is used, but the communication trunk line 50a is not used.

Normally, the control unit 10 of the in-vehicle relay device 1a relays communication based on the normal routing table. When the control unit 10 of the in-vehicle relay device 1a performs abnormality determination for the communication trunk line 50b, it outputs a signal indicating the start of abnormality determination for the communication trunk line 50b to the in-vehicle relay device 1c, and sets the routing table to be referred to for the first determination. Switch to table. The control unit 10 of the in-vehicle relay device 1c that has received the above output signal starts relaying communication through a relay route that does not pass through the communication trunk line 50b based on the determination routing table stored in the storage unit 11 of the own device. do. The control unit 10 of the in-vehicle relay device 1a relays communication based on the first determination table. The control unit 10 of the in-vehicle relay device 1a relays communication using at least one of the communication trunk line 50b, the communication branch line 51a, and the communication branch line 51b. At this time, since the communication trunk line 50b is not used for communication, the communication state of the communication trunk line 50b is inactive.

The control unit 10 of the in-vehicle relay device 1a changes the communication state of the communication trunk line 50b to the inactive state by switching the routing table to be referred to to the first determination table. The control unit 10 of the in-vehicle relay device 1a performs an abnormality determination in the same manner as in the first embodiment for the communication trunk line 50b whose communication state has changed to the inactive state. For example, the control unit 10 of the in-vehicle relay device 1a outputs to the in-vehicle relay device 1c a signal indicating the end of the abnormality determination for the communication trunk line 50b after completing the abnormality determination. The control unit 10 of the in-vehicle relay device 1c that has received the above output signal relays communication based on the normal routing table stored in the storage unit 11 of the own device.

When the control unit 10 of the in-vehicle relay device 1a performs abnormality determination for the communication trunk line 50a, it outputs a signal indicating the start of abnormality determination for the communication trunk line 50a to the in-vehicle relay device 1b, and sets the routing table to be referred to for the second determination. Switch to table. The control unit 10 of the in-vehicle relay device 1b that has received the above output signal starts relaying communication through a relay route that does not pass through the communication trunk line 50a, based on the determination routing table stored in the storage unit 11 of the own device. do. The control unit 10 of the in-vehicle relay device 1a relays communication based on the second determination table. The control unit 10 of the in-vehicle relay device 1a relays communication using at least one of the communication trunk line 50a, the communication branch line 51a, and the communication branch line 51b. At this time, since the communication trunk line 50a is not used for communication, the communication state of the communication trunk line 50a is inactive.

The control unit 10 of the in-vehicle relay device 1a changes the communication state of the communication trunk line 50a to the inactive state by switching the routing table to be referred to to the second determination table. The control unit 10 of the in-vehicle relay device 1a performs an abnormality determination in the same manner as in the first embodiment for the communication trunk line 50a whose communication state has changed to the inactive state. For example, the control unit 10 of the in-vehicle relay device 1a outputs to the in-vehicle relay device 1b a signal indicating the end of the abnormality determination for the communication trunk line 50a after completing the abnormality determination. The control unit 10 of the in-vehicle relay device 1b that has received the above output signal relays communication based on the normal routing table stored in the storage unit 11 of the own device.

When there is an abnormality in the communication trunk line 50a or the communication trunk line 50b, the controller 10 of the in-vehicle relay device 1a outputs that there is an abnormality in the communication line 5, as in the first embodiment. When there is an abnormality in the communication trunk line 50a, the control unit 10 of the in-vehicle relay device 1a may relay communication through a route that does not pass through the communication trunk line 50a, based on, for example, the second determination table. When there is an abnormality in the communication trunk line 50b, the control unit 10 of the in-vehicle relay device 1a may relay communication through a route that does not pass through the communication trunk line 50b, for example, based on the first determination table.

Similarly to the control unit 10 of the on-vehicle relay device 1a, the control unit 10 of the on-vehicle relay device 1 other than the on-vehicle relay device 1a also performs abnormality determination for the communication trunk line 50 connected to the own device. For example, the determination routing table corresponding to the communication trunk line 50 connected to each on-vehicle relay device 1 and on-vehicle equipment is stored in the storage unit 11 of each on-vehicle relay device 1 . For example, the determination routing table used by each in-vehicle relay device 1 may be collectively stored in the storage unit 11 of any one of the four in-vehicle relay devices 1 .

As in the first embodiment, the controller 10 of the in-vehicle relay device 1 may output a sleep signal when the IG switch turns from the on state to the off state, and may perform abnormality determination for the communication line 5 . As in the second embodiment, the control unit 10 may perform abnormality determination based on the communication state table.

FIG. 8 is a flowchart exemplifying processing related to abnormality determination processing performed by the control unit 10 of the third embodiment. For example, after the IG switch is turned on from an off state, the control unit 10 periodically or irregularly performs the following processing. A case where the control unit 10 of the in-vehicle relay device 1a performs processing will be described below. For example, the control unit 10 performs processing related to communication relay and the following processing in parallel.

As described above, the control unit 10 switches the routing table from the normal routing table to the first determination table (S51). As described above, the communication state of the communication trunk line 50b transitions to the inactive state. The control unit 10 executes abnormality determination for the inactive communication trunk line 50 (S52). Specifically, the control unit 10 executes abnormality determination for the communication trunk line 50b.

The control unit 10 determines whether or not there is an abnormality in the communication trunk line 50 for which the abnormality determination has been performed (S53). If there is an abnormality in the communication trunk line 50 for which the abnormality determination has been performed (S53: YES), the control unit 10 outputs that there is an abnormality in the communication line 5 (S54), and terminates the process. The control unit 10 may switch the routing table to, for example, a second determination table, and relay communication through a relay route that does not pass through the communication trunk line 50 with an abnormality.

If there is no abnormality in the communication trunk 50 for which the abnormality determination has been performed (S53: NO), the control unit 10 switches the routing table from the first determination table to the second determination table as described above (S55). As described above, the communication state of the communication trunk line 50a transitions to the inactive state. The control unit 10 executes abnormality determination for the inactive communication trunk line 50 (S56). Specifically, the control unit 10 executes abnormality determination for the communication trunk line 50a.

The control unit 10 determines whether or not there is an abnormality in the communication trunk line 50 for which the abnormality determination has been performed (S57). If there is an abnormality in the communication trunk 50 for which the abnormality determination has been performed (S57: YES), the control unit 10 outputs that there is an abnormality in the communication line 5 (S58), and terminates the process. The control unit 10 may switch the routing table to, for example, the first determination table, and relay communication through a relay route that does not pass through the communication trunk line 50 with an abnormality.

If there is no abnormality in the communication trunk 50 for which the abnormality determination has been performed (S57: NO), the control unit 10 switches the routing table from the second determination table to the normal routing table, and terminates the process.

When the in-vehicle relay device 1 performs an abnormality determination for one communication trunk line 50 among the plurality of communication trunk lines 50 connected to the own device, the vehicle-mounted relay device 1 determines whether the other communication trunk lines 50 among the plurality of communication trunk lines 50 connected to the own device are judged to be abnormal. It relays communication of the in-vehicle ECU 2 via the communication trunk line 50 . At this time, one communication trunk line 50 out of the plurality of communication trunk lines 50 connected to the in-vehicle relay device 1 is not used for communication, so the communication state of the one communication trunk line 50 is inactive. Therefore, abnormality determination is performed for the communication trunk line 50 in the inactive state. The in-vehicle relay device 1 relays the communication of the in-vehicle ECU 2 via the one communication trunk line 50 when performing an abnormality determination on another communication trunk line 50 . The in-vehicle relay device 1 can determine the abnormality of the communication trunk line 50 at any time.

(Embodiment 4)
FIG. 9 is a schematic diagram illustrating the configuration of an in-vehicle system S according to the fourth embodiment. In the configuration according to the fourth embodiment, the same components as those of the third embodiment are denoted by the same reference numerals, and detailed description thereof will be omitted. In the fourth embodiment, as in the third embodiment, out of the plurality of communication trunk lines 50 connected to the device itself, the communication trunk lines 50 other than one communication trunk line 50 and the communication branch line 51 connected to the device itself are used. The present invention relates to an in-vehicle relay device 1 that relays communication and performs abnormality determination for one communication trunk line 50 .

An in-vehicle system S of Embodiment 4 includes two in-vehicle repeaters 1, an in-vehicle repeater 1a and an in-vehicle repeater 1b. The in-vehicle relay device 1a and the in-vehicle relay device 1b are mounted on the vehicle C. As shown in FIG. The in-vehicle relay device 1a and the in-vehicle relay device 1b are connected by a communication trunk line 50a and a communication trunk line 50b. Two communication trunk lines 50 are connected to each of the in-vehicle relay device 1a and the in-vehicle relay device 1b. Since the in-vehicle relay device 1a and the in-vehicle relay device 1b can communicate with each other through the two communication trunk lines 50, the communication between the in-vehicle relay device 1a and the in-vehicle relay device 1b is made redundant.

The vehicle C is equipped with four in-vehicle ECUs 2, an in-vehicle ECU 2a, an in-vehicle ECU 2b, an in-vehicle ECU 2c, and an in-vehicle ECU 2d. The in-vehicle relay device 1a is connected to the in-vehicle ECU 2a via a communication branch line 51a, and is connected to the in-vehicle ECU 2b via a communication branch line 51b. The in-vehicle relay device 1b is connected to the in-vehicle ECU 2c by a communication branch line 51c, and is connected to the in-vehicle ECU 2d by a communication branch line 51d. An in-vehicle device 3 is connected to each in-vehicle ECU 2 .

The in-vehicle relay device 1a relays communication between the in-vehicle ECU 2a and the in-vehicle ECU 2b. The in-vehicle relay device 1b relays communication between the in-vehicle ECU 2c and the in-vehicle ECU 2d. In-vehicle relay device 1a and in-vehicle relay device 1b cooperate to relay communication between in-vehicle ECU 2a or in-vehicle ECU 2b and in-vehicle ECU 2c or in-vehicle ECU 2d via communication trunk line 50a or communication trunk line 50b.

For example, the controller 10 of the in-vehicle relay device 1a performs abnormality determination on the communication trunk lines 50a and 50b. Specifically, when the control unit 10 of the in-vehicle relay device 1a performs an abnormality determination for the communication trunk line 50a, as in the fourth embodiment, of the communication trunk lines 50a and 50b, only the communication trunk line 50b is used to relay communication. do. Since the communication state of the communication trunk line 50a becomes inactive, the control unit 10 of the in-vehicle relay device 1a performs abnormality determination for the communication trunk line 50a. When there is an abnormality in the communication trunk line 50a, the controller 10 of the in-vehicle relay device 1a outputs that the communication line 5 is abnormal.

When the controller 10 of the in-vehicle relay device 1a performs abnormality determination for the communication trunk line 50b, it relays communication using only the communication trunk line 50a out of the communication trunk lines 50a and 50b in the same manner as in the fourth embodiment. Since the communication state of the communication trunk line 50b becomes inactive, the control unit 10 of the in-vehicle relay device 1a performs abnormality determination for the communication trunk line 50b. If there is an abnormality in the communication trunk line 50b, the controller 10 of the in-vehicle relay device 1a outputs that the communication line 5 has an abnormality. The controller 10 of the in-vehicle relay device 1b may perform abnormality determination for the communication trunk lines 50a and 50b.

As in the first embodiment, the controller 10 of the in-vehicle relay device 1 may output a sleep signal when the IG switch turns from the on state to the off state, and perform abnormality determination. As in the second embodiment, the control unit 10 may perform abnormality determination based on the communication state table.

The embodiments disclosed this time are illustrative in all respects and should be considered not restrictive. The scope of the present disclosure is indicated by the scope of the claims rather than the meaning described above, and is intended to include all modifications within the scope and meaning equivalent to the scope of the claims.

C vehicle S in-vehicle system 1 in-vehicle relay device 10 control unit 11 storage unit 110 program 12 communication unit 2 in-vehicle ECU
20 control unit 21 storage unit 22 communication unit 3 in-vehicle device 30 sensor 4 recording medium 5 communication line 50 communication trunk line 51 communication branch line

Claims (12)

An in-vehicle relay device connected to a plurality of in-vehicle devices and relaying communication of the plurality of in-vehicle devices,
A control unit that controls the relay of the communication,
When a communication state of a communication line connecting the device and the vehicle-mounted device is in an inactive state in which communication via the communication line is not performed, the control unit determines that the communication line is abnormal. In-vehicle relay device. the communication state of the communication line transitions from an active state in which communication via the communication line is performed to the inactive state when the in-vehicle device receives a sleep signal;
The control unit
outputting the sleep signal to the in-vehicle device when the own device transitions from the active state to the hibernation state;
The in-vehicle relay device according to claim 1, wherein the abnormality determination is performed after outputting the sleep signal. The control unit
storing the determination result of the abnormality determination in a predetermined storage area accessible from the own device;
3. The in-vehicle relay device according to claim 2, wherein when the self-device transitions from the hibernation state to the active state, predetermined processing is performed according to the determination result stored in the predetermined storage area. A plurality of the communication lines are connected to the device,
The control unit
identifying the communication line in the inactive state based on a communication state table storing the communication state of each of the plurality of communication lines;
The in-vehicle relay device according to any one of claims 1 to 3, wherein the abnormality determination is performed for the specified communication line. The communication state table is stored in a predetermined storage area accessible from the device itself,
The in-vehicle relay according to claim 4, wherein the control unit updates the communication status of the communication line stored in the communication status table according to the status of the on-vehicle device connected to each of the plurality of communication lines. Device. The in-vehicle relay device according to any one of claims 1 to 5, wherein, when there is an abnormality in the communication line, the control section outputs that there is an abnormality in the communication line. The in-vehicle relay device according to any one of claims 1 to 6, wherein an Ethernet communication protocol is used for the communication. The in-vehicle relay device according to any one of claims 1 to 7, wherein the abnormality determination is based on a measurement result of a specific impedance of the communication line. a plurality of in-vehicle relay devices according to any one of claims 1 to 8, which are included in the in-vehicle device;
a communication trunk line included in the communication line, connecting the plurality of in-vehicle relay devices;
A plurality of communication trunk lines are connected to each of the in-vehicle relay devices,
The in-vehicle relay device and the in-vehicle ECU included in the in-vehicle device are connected by a communication branch line included in the communication line,
The in-vehicle relay device
when the communication state of the connected communication trunk is in the inactive state, performing the abnormality determination for the communication trunk;
An anomaly determination system that performs the abnormality determination for the communication branch line when the communication state of the connected communication branch line is the inactive state. When the in-vehicle relay device performs the abnormality determination for one of the plurality of connected communication trunk lines, the in-vehicle relay device can 10. The abnormality determination system according to claim 9, wherein the communication of the in-vehicle ECU is relayed by the vehicle-mounted ECU. An abnormality determination method performed by an in-vehicle relay device connected to a plurality of in-vehicle devices and relaying communication of the plurality of in-vehicle devices,
When a communication state of a communication line connecting the in-vehicle relay device and the in-vehicle device is in an inactive state in which communication is not performed through the communication line, an abnormality determination method is performed for the communication line. . A computer connected to multiple in-vehicle devices by communication lines,
A program for executing a process of determining an abnormality with respect to the communication line when the communication state of the communication line is an inactive state in which communication via the communication line is not performed.

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