JP2018195979A - Communication system, relay device and electronic control device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To start communication between networks as soon as possible when a communication system in which a relay device relays communication between a plurality of networks having at least two different communication protocols is activated. A communication system 2 of the present disclosure relays communication between a plurality of networks and electronic control devices 10 and 70 connected to each of a plurality of networks 2 to 6 in which at least two types of communication protocols exist. The device 40 is provided. The first communication unit 46 of the relay device communicates with the electronic control device. The state acquisition unit 44 of the relay device acquires the communication status of each of the plurality of networks. The first control unit 46 of the relay device is an electronic control device that connects to a network for which communication is established based on the communication state acquired by the state acquisition unit when at least one of the plurality of networks is activated. The first communication unit transmits that the communication of the network for which the communication has not been established has been established. [Selection diagram] Fig. 1

Description

  The present disclosure relates to a technique in which a relay device relays communication between a plurality of networks in which at least two types of communication protocols exist.

  A communication system in which a relay device relays communication between networks having different communication protocols is known. For example, Patent Document 1 describes a technique in which a relay device relays communication between CAN and Ethernet as networks having different communication protocols. CAN is an abbreviation for Controller Area Network. CAN and Ethernet are registered trademarks.

  The relay device converts the format of data received from the CAN according to the Ethernet communication protocol and transmits it to the Ethernet, and converts the format of data received from the Ethernet according to the CAN communication protocol and transmits it to the CAN.

Japanese Patent Laying-Open No. 2015-139093

  In the case of a communication system in which a relay device relays communication between networks with different communication protocols as in the technique disclosed in Patent Document 1, each of the networks with different communication protocols is activated when the communication system is activated. The time required to establish communication may vary.

  In this case, if data is transmitted from a network that has already established communication to a network that has not yet established communication, the relay device that has received the transmission data cannot transmit the destination device in the destination network. Data may not be sent to the previous device.

  Alternatively, even if the relay device specifies a device on the destination network and transmits data, the destination device may not be able to receive data because communication on the destination network is not established.

  Therefore, when networks with different communication protocols communicate with each other, it may be possible to prohibit communication between networks until the communication of the network with the longest time required for establishing the communication after the communication system is activated is established. .

  However, if the communication between networks is prohibited until the communication of the network that takes the longest time from the start to the establishment of communication is established, the time required for the communication system to start and the communication to start is long. There is a problem of becoming.

  The present disclosure provides a technique for starting communication between networks as soon as possible when a communication system in which a relay device relays communication between a plurality of networks having different at least two types of communication protocols is activated.

  The communication system (2, 50) of the present disclosure includes an electronic control device (10, 20, 60, 70) connected to each of a plurality of networks (4-8, 52-56) in which at least two types of communication protocols exist. And a relay device (40, 80) for relaying communication between a plurality of networks.

  The relay device includes a first communication unit (46, 86, S402 to S410, S442 to S446), a state acquisition unit (44, 84, S404, S408, S444), and a first control unit (42, 82, S402 to S410, S442 to S446).

  The electronic control unit includes a second communication unit (14, 24, 64, 74, S422, S428, S430, S436, S452, S458) and a second control unit (12, 22, 62, 72, S422, S424). , S428 to S432, S436, S452, S454, S458).

  The first communication unit of the relay device communicates with the electronic control device. The status acquisition unit of the relay device acquires the communication status of each of the plurality of networks. The first control unit of the relay device communicates with the electronic control device connected to the established network based on the communication state acquired by the state acquisition unit when at least one of the plurality of networks is activated. The first communication unit transmits that the communication of the network that has not been established has been established.

  The second communication unit of the electronic control device communicates with the electronic control device connected to another network via the relay device. The second control unit of the electronic control device controls communication by the second communication unit.

  The relay device (40, 80) of the present disclosure is an in-vehicle relay device that relays communication between a plurality of networks (4-8, 52-56) in which at least two types of communication protocols exist, and includes a communication unit ( 46, 86, S402 to S410, S442 to S446), a state acquisition unit (44, 84, S404, S408, S444), and a control unit (42, 82, S402 to S410, S442 to S446). Yes.

  The communication unit communicates with electronic control devices (10, 20, 60, 70) connected to each of the plurality of networks. The state acquisition unit acquires each communication state of the plurality of networks. When at least one of the plurality of networks is activated, the control unit is connected to the network (4, 52) with which communication is established based on the communication state acquired by the state acquisition unit (10, 60). ), The communication unit transmits that the communication of the network (6, 8, 54, 56) that has not been established has been established.

  The electronic control device (10, 60) of the present disclosure is an in-vehicle electronic control device that connects to at least one of a plurality of networks (4-8, 52-56) in which at least two types of communication protocols exist, A communication unit (14, 64, S422, S428, S430, S436, S452, S458) and a control unit (12, 62, S422, S424, S428 to S432, S436, S452, S454, S458) are provided.

  The communication unit communicates with the electronic control device (20, 70) connected to another network (6, 8, 54, 56) via the relay device (40, 80). When the communication unit receives that the communication of the other network has been established from the relay device, the control unit starts communication with the other network with which the communication has been established.

  According to the configuration of the communication system, the relay device, and the electronic control device of the present disclosure, the electronic control device connected to the network with which communication has been established indicates that communication of the network with which communication has not been established is established. Notification from the relay device. As a result, when the communication of the network that has not established communication is established, the electronic control device that is connected to the network that has established communication can immediately start communication with the electronic control device that is connected to the established network. .

  In addition, the code | symbol in the parenthesis described in the claim shows the correspondence with the specific means as described in embodiment mentioned later as one aspect, Comprising: The technical scope of this indication is limited is not.

1 is a block diagram showing a communication system according to a first embodiment. The time chart which shows the communication control processing by 1st Embodiment. The flowchart which shows the communication control process by the relay apparatus of 1st Embodiment. The flowchart which shows the communication control process by ECU of 1st Embodiment. The block diagram which shows the communication system by 2nd Embodiment. The flowchart which shows the communication control process by the relay apparatus of 2nd Embodiment. The flowchart which shows the communication control process by ECU of 2nd Embodiment.

Hereinafter, an embodiment to which the present disclosure is applied will be described with reference to the drawings.
[1. First Embodiment]
[1-1. Constitution]
The communication system 2 illustrated in FIG. 1 includes an electronic control device 10 connected to the CAN 4, an electronic control device 20 connected to the Ethernets 6 and 8, an Ethernet switch 30, and a relay device 40. The electronic control device is also referred to as an ECU. In FIG. 1, the Ethernet switch is indicated by SW.

  FIG. 1 shows four ECUs 10 connected to the CAN 4 and a total of six ECUs 20 connected to the Ethernets 6 and 8, respectively. Alternatively, a number of ECUs 20 other than those illustrated may be connected to the Ethernets 6 and 8. Since the configuration of the four ECUs 10 is substantially the same and the configuration of the six ECUs 20 is substantially the same, only the configuration of one ECU 10 and the configuration of one ECU 20 are shown.

  Each of the ECU 10, ECU 20, and relay device 40 is equipped with a microcomputer including a CPU, a RAM, a ROM, a communication interface, and the like. Each of the ECU 10, the ECU 20, and the relay device 40 may be equipped with one microcomputer or a plurality of microcomputers.

  ROM, RAM, and flash memory are semiconductor memories that are non-transitional tangible recording media. Various functions of the ECU 10, the ECU 20, and the relay device 40 are realized by the CPU executing a program stored in the non-transitional physical recording medium. When the CPU executes this program, a method corresponding to the program is executed.

  The method for realizing various functions of the ECU 10, the ECU 20, and the relay device 40 is not limited to software, and hardware in which some or all of the elements are combined with a logic circuit, an analog circuit, or the like may be used.

  The ECU 10 includes a control unit 12 and a communication unit 14. The control unit 12 executes a process determined for each ECU 10. Further, the control unit 12 communicates with the ECU 10 connected to the same CAN 4 by the communication unit 14, and communicates via the relay device 40 with the ECU 20 connected to the Ethernets 6 and 8 which are networks having different communication protocols from the CAN 4. To control that.

  When the ECU 10 connected to the CAN 4 transmits data individually to the ECU 20 connected to the Ethernets 6 and 8, the transmission destination ECU 20 is specified by the CANID set corresponding to each of the ECUs 20 connected to the Ethernets 6 and 8. .

  The ECU 20 includes a control unit 22 and a communication unit 24. The control unit 22 executes a process determined for each ECU 20. Further, the control unit 22 communicates with the ECU 20 connected to the same Ethernet 6, 8 via the communication unit 24, and via the ECU 10 and the relay device 40 connected to the CAN 4, which is a network having a communication protocol different from that of the Ethernet 6, 8. To control communication.

  When the ECU 20 connected to the Ethernets 6 and 8 individually transmits data to the ECU 10 connected to the CAN 4, the destination ECU 10 is designated by the MAC address set corresponding to each of the ECUs 10 connected to the CAN 4.

  The Ethernet switch 30 creates a correspondence table between the MAC addresses and the Ethernet ports of the relay device 40 and the ECU 20 connected to the same Ethernet 6 or Ethernet 8 as the Ethernet switch 30.

  The Ethernet switch 30 transmits the Ethernet frame transmitted from the ECU 20 or the relay device 40 to the Ethernet port corresponding to the destination MAC address based on the correspondence table between the MAC address and the Ethernet port.

  The relay device 40 includes a control unit 42, a state acquisition unit 44, and a communication unit 46. The control unit 42 relays communication data transmitted from one of the ECU 10 connected to the CAN 4 or one of the ECUs 20 connected to the Ethernets 6 and 8 to the other side of the ECU 10 or the ECU 20 according to the communication protocol of the destination network. .

  Further, when at least one of CAN 4 and Ethernet 6 and 8 is activated, the control unit 42 first establishes the communication state of Ethernet 6 and 8 acquired by the state acquisition unit 44 from the communication unit 46 and communication is established. To CAN4.

At least one of the CAN 4 and the Ethernets 6 and 8 is activated in the following cases (1) to (3), for example.
(1) When the engine start switch is turned on, the communication system 2 is activated, and all of the CAN 4 and the Ethernets 6 and 8 are activated.

(2) When the abnormality occurs in the entire communication system 2 and the CAN 4 and the Ethernets 6 and 8 are all started by resetting and restarting the communication system 2.
(3) When an abnormality occurs in at least one of the Ethernets 6 and 8, and at least one of the Ethernets 6 and 8 is reset and restarted.

The state acquisition unit 44 acquires, from the communication unit 46, the communication state from the start of activation until communication is established in each of the CAN 4 and the Ethernets 6 and 8.
The communication unit 46 includes a CAN port to which the CAN 4 bus is connected and an Ethernet port to which the Ethernet 6 and 8 buses are connected.

  As shown in FIG. 2, when the communication system 2 is activated, the control unit 12 of the ECU 10 connected to the CAN 4 and the control unit 22 of the ECU 20 connected to the Ethernets 6 and 8 are connected to each other. The memory check and the startup processing such as diagnosis processing for the control units 12 and 22 and the communication units 14 and 24 are executed.

  The ECU 10 prohibits communication by the communication unit 14 for a predetermined communication mask time after starting activation. The communication mask time is the time required until CAN communication can be performed after all ECUs 10 start up, including variations among ECUs 10. When the communication mask time elapses, the control unit 12 permits communication by the communication unit 14.

When the start-up process is completed, the ECU 20 sends out continuous pulses called a first link pulse burst. The first link pulse is also called FLP.
ECU20 performs the negotiation which notifies the communication mode and communication speed of the communication part 24 of ECU20 to other ECU20 by sending a FLP burst. The communication unit 46 of the relay device 40 also sends an FLP burst to each of the Ethernets 6 and 8. Thereby, ECU20 and the relay apparatus 40 acquire each other's communication mode and communication speed.

  When the negotiation is completed in the Ethernets 6 and 8, the relay device 40 determines that the first-stage communication establishment is completed in the Ethernets 6 and 8. When the first-stage communication establishment is completed on the Ethernets 6 and 8, broadcast communication can be performed from the ECU 10 connected to the CAN 4 to the ECU 20 connected to the Ethernets 6 and 8.

  When the first-stage communication establishment is completed, the Ethernet switches 30 of the Ethernets 6 and 8 receive data from the ECU 20 to create a correspondence table between the MAC address of the ECU 20 and the Ethernet port. When the correspondence table between the MAC address and the Ethernet port is completed for all the ECUs 20 connected to the Ethernet port, in the Ethernet 6 and 8, the ECUs 20 can communicate with each other by specifying individual transmission destinations. Communication establishment is completed.

  When the second-stage communication establishment is completed in the Ethernets 6 and 8, unicast communication can be performed between the ECUs 20 connected to the Ethernets 6 and 8 and from the ECU 10 connected to the CAN 4 to the ECU 20 connected to the Ethernets 6 and 8.

  The time required from the start of CAN 4 to the completion of communication establishment is shorter than the time required from the start of Ethernet 6 or 8 to the completion of communication establishment. That is, for example, when the communication system 2 is activated and the CAN 4 and the Ethernets 6 and 8 start to be activated, the communication establishment of the CAN 4 is completed before the Ethernets 6 and 8.

[1-2. processing]
Communication control processing executed by the communication system 2 will be described with reference to FIGS. 3 is a communication control process executed by the relay device 40, and FIG. 4 is a communication control process executed by the ECU 10 connected to the CAN 4.

The communication control process of FIGS. 3 and 4 is executed when the start switch of the vehicle is turned on and power is supplied or when an abnormality occurs in the communication system 2 and the communication system 2 is restarted.
(1) Communication Control Processing by Relay Device 40 In S400, the control unit 42 executes start-up processing such as memory check and diagnosis processing in the relay device 40. In S <b> 402, the control unit 42 starts processing for establishing communication between the communication unit 46 and the ECU 20 connected to each of the Ethernets 6 and 8 via the Ethernet switch 30.

  Specifically, the control unit 42 uses the communication unit 46 to start negotiations with the ECUs 20 connected to the Ethernets 6 and 8 to notify each other of the communication mode and the communication speed. The ECU 20 connected to each of the Ethernets 6 and 8 also starts negotiation.

  In S <b> 404, the state acquisition unit 44 acquires the communication states of the Ethernets 6 and 8 from the communication unit 46. The control unit 42 determines whether or not the negotiation has been completed on the Ethernets 6 and 8 based on the communication states of the Ethernets 6 and 8 acquired by the state acquisition unit 44.

  When the determination in S404 is Yes, that is, when the negotiation is completed and the first-stage communication establishment is completed, in S406, the control unit 42 indicates that the first-stage communication establishment is completed in the Ethernets 6 and 8. To CAN4.

  Next, in S408, the control unit 42 completes the correspondence table between the MAC address and the Ethernet port in the Ethernet switch 30, and the second stage communication establishment that allows the ECUs 20 connected to the Ethernets 6 and 8 to communicate individually is completed. Is determined based on the respective communication states of the Ethernets 6 and 8 acquired from the communication unit 46 by the state acquisition unit 44.

  When the determination in S408 is Yes, that is, when the second-stage communication establishment is completed, in S410, the control unit 42 transmits from the communication unit 46 to the CAN 4 that the second-stage communication establishment is completed on the Ethernets 6 and 8. .

(2) Communication control process by ECU10 In S420, the control part 12 performs starting processes, such as a memory check in ECU10 and a diagnostic process. When the activation process of S420 is completed, in S422, the control unit 12 determines whether or not the communication unit 14 has received information indicating that the first-stage communication establishment has been completed on the Ethernets 6 and 8 from the relay device 40. .

  The determination of S422 is No and the determination of S424 is Yes, that is, the communication unit 14 relays information indicating that the first-stage communication establishment is completed even after a predetermined time has elapsed after the start-up process is completed. If not received from the device 40, the control unit 12 does not transmit data to the Ethernets 6 and 8 for which the first-stage communication establishment has not been completed. In step S426, the control unit 12 performs a fail process.

As the fail process, the control unit 12 starts a process that can be executed without communicating with any of the Ethernets 6 and 8 for which the first communication establishment has not been completed within a predetermined time.
When the determination in S422 is Yes, that is, when the communication unit 14 receives information indicating that the first-stage communication establishment is completed on the Ethernets 6 and 8 from the relay device 40 within a predetermined time after the start-up process is completed. In S <b> 428, the control unit 12 transmits broadcast transmission data to the ECU 20 connected to the Ethernets 6 and 8 to the relay device 40.

The load cast transmission data transmitted by each ECU 10 includes, for example, the time in the ECU 10, the execution state of the ECU 10, and the like.
In S430, the control unit 12 determines whether or not the communication unit 14 has received from the relay device 40 information indicating that the second-stage communication establishment has been completed on the Ethernets 6 and 8.

  If the determination in S430 is No and the determination in S432 is Yes, that is, the communication unit 14 provides information indicating that the second-stage communication establishment is completed within a predetermined time after the first-stage communication establishment is completed. When not receiving from the relay apparatus 40, the control part 12 does not transmit separate data with respect to ECU20 connected to Ethernet6,8 in which the communication establishment of the 2nd step is not completed.

In step S434, the control unit 12 performs a fail process. The fail process executed in S434 is substantially the same as the fail process executed in S426.
The determination in S430 is Yes, that is, the communication unit 14 relays information indicating that the second-stage communication establishment is completed in the Ethernets 6 and 8 within a predetermined time after the first-stage communication establishment is completed. When receiving from 40, the control unit 12 transmits unicast transmission data to the individual ECUs 20 connected to the Ethernets 6 and 8 to the relay device 40 in S436.

[1-3. effect]
In the first embodiment described above, the following effects can be obtained.
(1) The CAN 4 that completes establishment of communication earlier than the Ethernet 6 and 8 after the start switch of the vehicle is turned on and power is supplied and the communication system 2 is activated is transferred from the relay device 40 to the Ethernet 6 and 8. The first stage communication establishment and the second stage communication establishment are notified of completion.

Thereby, the ECU 10 connected to the CAN 4 can execute communication corresponding to each stage of communication establishment with the ECU 20 connected to the Ethernets 6 and 8 having established communication as soon as possible.
(2) The ECU 10 connected to the CAN 4 is connected to each of the ECUs 20 connected to the Ethernet 6 and 8 until it is notified that the Ethernet 6 and 8 have completed the first-stage communication establishment and the second-stage communication establishment. Data corresponding to the stage is not transmitted to the relay device 40.

  Thereby, it is possible to suppress the relay device 40 from receiving data broadcast from the ECU 10 connected to the CAN 4 to the ECU 20 connected to the Ethernet 6 and 8 when the Ethernet 6 and 8 is establishing the first-stage communication. .

  Alternatively, it is possible to suppress the relay device 40 from receiving data to be transmitted from the ECU 10 connected to the CAN 4 to the individual ECU 20 connected to the Ethernet 6 or 8 before the second-stage communication establishment is completed on the Ethernet 6 or 8. .

  In the first embodiment, the communication system 2 corresponds to the communication system, the CAN 4 and the Ethernets 6 and 8 correspond to networks having different communication protocols, the control unit 12 corresponds to the second control unit, and the communication unit. 14 corresponds to the second communication unit, the control unit 42 corresponds to the first control unit, the state acquisition unit 44 corresponds to the state acquisition unit, and the communication unit 46 corresponds to the first communication unit.

S402 to S410 correspond to the processes of the first control unit and the first communication unit, and S404 and S408 correspond to the process of the state acquisition unit.
S422, S424, S428 to S432, and S436 correspond to the processing of the second control unit, and S422, S428, S430, and S436 correspond to the processing of the second communication unit.

[2. Second Embodiment]
[2-1. Constitution]
In the second embodiment, an in-vehicle communication system that is not limited to the CAN 4 and the Ethernets 6 and 8 of the first embodiment will be described as different communication protocols.

  A communication system 50 shown in FIG. 5 includes an ECU 60 connected to the first network 52, an ECU 70 connected to the second networks 54 and 56, and a relay device 80. The communication protocols of the second networks 54 and 56 are the same, and the communication protocols of the first network 52 and the second networks 54 and 56 are different.

Since the configuration of the ECU 60 is substantially the same and the configuration of the ECU 70 is substantially the same, only the configuration of one ECU 60 and the configuration of one ECU 70 are shown.
The time required for the establishment of communication after the start switch of the vehicle is turned on to supply power and the communication system 50 is started is longer in the second networks 54 and 56 than in the first network 52. long.

The relay device 80 relays communication between the first network 52 and the second networks 54 and 56.
The control unit 62, the communication unit 64, the control unit 72, the communication unit 74, the control unit 82 of the relay device 80, the state acquisition unit 84, and the communication unit 86 of the ECU 60 of the second embodiment are the same as those of the ECU 10 of the first embodiment. Since the control unit 12, the communication unit 14, the control unit 22 of the ECU 20, the communication unit 24, the control unit 42 of the relay device 40, the state acquisition unit 44, and the communication unit 46 correspond to each other, the substantial configuration is the same. Description of the configurations of the ECUs 60 and 70 and the relay device 80 will be omitted.

[2-2. processing]
Communication control processing executed by the communication system 50 according to the second embodiment will be described with reference to FIGS. FIG. 6 is a communication control process executed by the relay device 80, and FIG. 7 is a communication control process executed by the ECU 60 connected to the first network 52.

(1) Communication Control Processing by Relay Device 80 In S440, the control unit 82 executes startup processing such as memory check and diagnosis processing in the relay device 80. In S442, the control unit 82 starts processing for establishing communication between the communication unit 86 and the ECU 70 connected to each of the second networks 54 and 56.

  In S444, the state acquisition unit 84 acquires the communication state of each of the second networks 54 and 56 from the communication unit 86. The control unit 82 determines whether or not communication establishment is completed in the second networks 54 and 56 based on the communication states of the second networks 54 and 56 acquired by the state acquisition unit 84.

  When the determination in S444 is Yes, that is, when communication establishment is completed in the second networks 54 and 56, in S446, the control unit 82 notifies the communication unit 86 that communication establishment is completed in the second networks 54 and 56. 1 to the network 52.

(2) Communication control processing by ECU 60 In S450, the ECU 60 executes startup processing such as memory check and diagnostic processing in the apparatus. When the activation process of S450 is completed, in S452, the control unit 62 determines whether the communication unit 64 has received information indicating that communication establishment has been completed in the second networks 54 and 56 from the relay device 80.

  The determination in S452 is No, and the determination in S454 is Yes, that is, information indicating that communication establishment has been completed in the second networks 54 and 56 is communicated even if a predetermined time has elapsed after the start-up process is completed. When the unit 64 does not receive from the relay device 80, the control unit 62 does not transmit data to the second networks 54 and 56 for which communication establishment has not been completed. In step S456, the control unit 62 performs a fail process.

  As a fail process, the ECU 60 connected to the first network 52 starts a process that can be executed without communicating with either of the second networks 54 and 56 for which communication establishment has not been completed within a predetermined time.

  When the determination of S452 is Yes, that is, when the communication unit 64 receives from the relay device 80 information indicating that communication establishment is completed in the second networks 54 and 56 within a predetermined time after the start-up process is completed, In S <b> 458, the control unit 62 transmits transmission data for the ECU 70 connected to the second networks 54 and 56 to the relay device 80.

[2-3. effect]
In the first embodiment described above, the following effects can be obtained.
(1) The first network 52 that completes communication establishment earlier than the second networks 54 and 56 after the start switch of the vehicle is turned on and power is supplied and the communication system 50 is activated is the relay device 80. Notifies that the establishment of communication is completed in the second networks 54 and 56.

Thereby, ECU60 connected to the 1st network 52 can perform communication with ECU70 connected to the 2nd networks 54 and 56 with which communication establishment was completed as soon as possible.
(2) The ECU 60 connected to the first network 52 relays transmission data to the ECU 70 connected to the second networks 54 and 56 until notified that the communication establishment is completed in the second networks 54 and 56. Not sent to device 80.

  Thereby, when the second networks 54 and 56 are establishing communication, the relay device 80 receives data to be transmitted from the ECU 60 connected to the first network 52 to the ECU 70 connected to the second networks 54 and 56. Can be suppressed.

  In the second embodiment, the communication system 50 corresponds to the communication system, the first network 52 and the second networks 54 and 56 correspond to networks having different communication protocols, and the control unit 62 performs the second control. The communication unit 64 corresponds to the second communication unit, the control unit 82 corresponds to the first control unit, the state acquisition unit 84 corresponds to the state acquisition unit, and the communication unit 86 includes the first communication unit 86. Corresponds to the communication unit.

Moreover, S442-S446 respond | corresponds to each process of a 1st control part and a 1st communication part, and S444 respond | corresponds to the process of a state acquisition part.
S452, S454, and S458 correspond to the processing of the second control unit, and S452 and S458 correspond to the processing of the second communication unit.

[3. Other Embodiments]
(1) The communication system may be configured by three or more types of networks instead of two types of networks with different communication protocols. In this case, it is not necessary for the ECU connected to the network where the communication establishment is completed first to wait for the start of the communication until the communication establishment of all the networks is completed. Good.

  (2) In the above embodiment, the ECU 10 connected to the CAN 4 for which communication establishment has been completed, or the ECU 60 connected to the first network 52 has the Ethernet 6, 8 or the second networks 54, 56 having different communication protocols. Until the establishment of the communication is completed, the communication with the Ethernet 6, 8 or the second network 54, 56 is awaited.

  On the other hand, the ECU 10 connected to the CAN 4 whose communication has been established and the ECU 60 connected to the first network 52 waited for the communication establishment of the Ethernets 6 and 8 or the second networks 54 and 56 to be completed. Instead, communication with respect to the Ethernets 6 and 8 or the second networks 54 and 56 may be started. In this case, the transmission-side ECUs 10 and 60 determine that the transmission data has not been received because there is no response to the transmitted data.

  As described above, the ECU 10 or 60 connected to the network in which the communication has been established transmits to the other network without waiting for the communication establishment in the other network to be completed. In the communication control processing of the ECUs 10 and 60 connected to the network, processing for waiting for completion of communication establishment of other networks is not required.

  (3) In the first embodiment, when an abnormality occurs in at least one of the Ethernets 6 and 8, and the Ethernets 6 and 8 in which the abnormality has occurred are reset and restarted, the relay device 40 determines that the Ethernet in which the abnormality has occurred The communication statuses 6 and 8 may be acquired, and based on the acquired communication status, it may be transmitted to the ECU 10 connected to the CAN 4 that the communication of the Ethernets 6 and 8 that have not been established is established.

  Similarly, in the second embodiment, when an abnormality occurs in at least one of the second networks 54 and 56 and the second network 54 and 56 in which the abnormality has occurred is reset and restarted, the relay device 80 The communication status of the second networks 54 and 56 in which an abnormality has occurred is acquired, and the communication of the second networks 54 and 56 that has not been established is established based on the acquired communication status. It may be transmitted to the ECU 60 connected to one network 52.

  (4) The functions of one component in the above embodiment may be distributed as a plurality of components, or the functions of a plurality of components may be integrated into one component. Further, at least a part of the configuration of the above embodiment may be replaced with a known configuration having the same function. Moreover, you may abbreviate | omit a part of structure of the said embodiment as long as a subject can be solved. In addition, all the aspects contained in the technical thought specified only by the wording described in the claim are embodiment of this indication.

  (5) In addition to the relay devices 40 and 80 and the electronic control devices 10 and 60 and the communication systems 2 and 50 described above, a communication control program for causing a computer to function as the relay devices 40 and 80 or the electronic control devices 10 and 60, The present disclosure can also be realized in various forms such as a recording medium recording the communication control program and a communication control method.

2, 50: communication system, 4: CAN (network), 6, 8: Ethernet (network), 10, 20, 60, 70: ECU (electronic control unit), 12, 82: control unit (first control unit) ), 14, 84: status acquisition unit, 16, 86: communication unit (first communication unit), 22, 72: control unit (second control unit), 24, 74: communication unit (second communication unit) 40, 80: Relay device

Claims (6)

An electronic control device (10, 20, 60, 70) connected to each of a plurality of networks (4-8, 52-56) having at least two types of communication protocols;
A relay device (40, 80) for relaying communication between the plurality of networks;
An in-vehicle communication system (2, 50) comprising:
The relay device is
A first communication unit (46, 86, S402 to S410, S442 to S446) configured to communicate with the electronic control unit;
A status acquisition unit (44, 84, S404, S408, S444) configured to acquire the communication status of each of the plurality of networks;
When at least one of the plurality of networks is activated, communication is not established with the electronic control unit connected to the network with which communication is established based on the communication state obtained by the state obtaining unit. A first control unit (42, 82, S402 to S410, S442 to S446) configured to transmit from the first communication unit that communication of the network has been established;
With
The electronic control device
Second communication units (14, 24, 64, 74, S422, S428, S430, S436, S452, S458) configured to communicate with the electronic control device connected to the other network via the relay device. )When,
A second control unit (12, 22, 62, 72, S422, S424, S428 to S432, S436, S452, S454, S458) configured to control communication by the second communication unit;
Comprising
Communications system. The communication system according to claim 1,
The second control unit (S422, S424, S430, S432, S452, S454) of the electronic control device connected to the network where communication is established does not transmit data to the network where communication is not established. Configured as
Communications system. The communication system according to claim 1,
The second control unit of the electronic control device connected to the network with which the communication has been established has the second communication with the destination network even if the communication with the destination network has not been established. Configured to send data from the department,
Communications system. The communication system according to any one of claims 1 to 3,
The second control unit (S424, S432, S454) of the electronic control device that is connected to the network with which communication has been established is connected to the other network that has not established communication with the relay device within a predetermined time. If the second communication unit does not receive that communication has been established, the second communication unit is configured not to transmit data to the other network that has not established communication.
Communications system. An in-vehicle relay device (40, 80) that relays communication between a plurality of networks (4-8, 52-56) in which at least two types of communication protocols exist,
A communication unit (46, 86, S402 to S410, S442 to S446) configured to communicate with an electronic control device (10, 20, 60, 70) connected to each of the plurality of networks;
A status acquisition unit (44, 84, S404, S408, S444) configured to acquire the communication status of each of the plurality of networks;
When at least one of the plurality of networks is activated, based on the communication state acquired by the state acquisition unit, the electronic control device (10, 10) connected to the network (4, 52) in which communication is established 60), the control unit (42, 82, S402 to S410) configured to transmit from the communication unit that the communication of the network (6, 8, 54, 56) that has not been established is established. , S442 to S446),
A relay device comprising: An in-vehicle electronic control device (10, 60) connected to at least one of a plurality of networks (4-8, 52-56) in which at least two types of communication protocols exist,
A communication unit (14, 64) configured to communicate with the electronic control device (20, 70) connected to the other network (6, 8, 54, 56) via the relay device (40, 80). S422, S428, S430, S436, S452, S458),
When the communication unit receives from the relay device that communication of the other network has been established, a control unit configured to start communication with the other network with which communication has been established by the communication unit (12, 62, S422, S424, S428 to S432, S436, S452, S454, S458),
An electronic control device comprising:

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