JP2021019284A - On-vehicle communication relay device - Google Patents

Abstract

To provide an on-vehicle communication relay device that can achieve a flexible relay process according to a dynamic condition.SOLUTION: An on-vehicle communication relay device for relaying data communication in a plurality of ECUs 10, 20 via a first network 15 and a second network 25, includes a storage unit 400 and a setting unit 450. The storage unit 400 stores one or more first messages on the first network 15 in one second message on the second network 25. The setting unit 450 dynamically sets the relay method for relaying the second message to the second network 25 during the communication operation, according to at least one of the information other than the information handled in the communication and the first message stored in the second message.SELECTED DRAWING: Figure 14

Description

The present disclosure relates to an in-vehicle communication relay device that relays messages between different networks.

Patent Document 1 describes an in-vehicle network gateway that relays messages between different networks. When the CAN message is converted into an Ethernet message and relayed, the vehicle-mounted network gateway stores the payload of the CAN message sequentially received in the Ethernet packet until a predetermined condition is satisfied. CAN and Ethernet are registered trademarks. Then, when the in-vehicle network gateway satisfies the predetermined condition, the vehicle-mounted network gateway transmits an Ethernet packet containing the payload of the CAN message received so far to the Ethernet network.

U.S. Patent Application Publication No. 2017/0072876

Since the in-vehicle network gateway executes the relay processing based on the predetermined conditions, there is a problem that the relay processing cannot be flexibly executed according to the dynamic conditions such as the vehicle state.

The present disclosure provides an in-vehicle communication relay device capable of realizing flexible relay processing according to dynamic conditions.

One aspect of the present disclosure is an in-vehicle communication relay device that relays data communication between a plurality of electronic control devices (10, 20) via a first network (15) and a second network (25). , A storage unit (400) and a setting unit (450) are provided. The storage unit is configured to store one or more first messages on the first network in one second message on the second network. The setting unit dynamically relays the second message to the second network during the communication operation according to at least one of the information other than the information handled in the communication and the first message stored in the second message. Configured to set.

According to one aspect of the present disclosure, the relay method is dynamically set during the communication operation according to at least one of the information other than the information handled in the communication and the first message stored in the second message. Therefore, flexible relay processing according to dynamic conditions can be realized.

It is a figure which shows the structure of an in-vehicle network system. It is a figure which shows the message of the 1st and 2nd networks. It is a figure which shows the structure of the relay device of this embodiment. It is a figure which shows the structure of the conventional relay device. It is explanatory drawing which shows the packing relay in the case of performing one-to-one conversion. It is explanatory drawing which shows the packing relay at the time of making a buffer full or a timeout as a transmission condition. It is a figure which shows the state which sends a message when a time-out occurs in a fixed timer. It is a figure which shows the state of sending a message when a buffer becomes full. It is explanatory drawing which shows the packing relay in the case where the timeout in a buffer full or a variable timer is a transmission condition. It is a figure which shows the state of sending a message when a time-out occurs in a variable timer. It is explanatory drawing which shows the packing relay when the time-out in a buffer full or a variable timer or the reception of a trigger frame is a transmission condition. It is a figure which shows the state of sending a message when a trigger frame is received. It is a figure which shows the message which the size threshold value and timer threshold value which concerns on this embodiment are dynamically changed. It is a figure which shows the switching of the relay system according to the vehicle mode which concerns on this embodiment. It is a figure which shows the message which the size threshold value and the timer threshold value are fixed according to the conventional. It is a figure which shows the fixed relay system regardless of the vehicle mode which concerns on the prior art. It is a figure which shows the setting example of the table used in the variable relay system, and the setting example of the deadline table for a signal ID. It is a figure which shows the switching of the relay system according to the communication load which concerns on this embodiment. It is a figure which shows the communication load and the 1st and 2nd load thresholds. It is a figure which shows the on / off setting of the switching of a table according to a signal value. It is a figure which shows the switching mode of the table according to a signal value. It is a sequence diagram which shows the relay process which concerns on this Embodiment. It is a sequence diagram which shows the relay system switching determination and execution processing which concerns on this Embodiment. It is a sequence diagram which shows the Ethernet transmission processing which concerns on this embodiment. It is a sequence diagram which shows the conventional relay processing.

<1. Configuration>
<1-1. Network system>
First, the configuration of the in-vehicle network system 100 according to the present embodiment will be described with reference to FIG.

The in-vehicle network system 100 includes a first network 15, a second network 25, and an in-vehicle communication relay device (hereinafter, relay device) 30.
The first network 15 is a network according to the first communication protocol, and one or more first electronic control devices (hereinafter, first ECU) 10 are connected to the first network 15. The first ECU 10 sends and receives a first message according to the first communication protocol.

The second network 25 is a network according to the second communication protocol, and one or more second electronic control devices (hereinafter, second ECU) 20 are connected to the second network 25. The second ECU 20 sends and receives a second message having a payload longer than that of the first message according to the second communication protocol.

The first network 15 is, for example, a network according to the CAN protocol or the CAN FD protocol, and the first message is a CAN message or a CAN FD message. In the present embodiment, the first network 15 is a CAN network, and the first message is a CAN message. Further, in the present embodiment, the second network 25 is a network according to the Ethernet protocol, and the second message is an Ethernet message.

The relay device 30 includes a first network transmission / reception unit 31, a second network transmission / reception unit 32, and a communication relay unit 33, and the first ECU 10 and the second ECU 20 are connected to each other via the first network 15 and the second network 25. Relay data communication between.

The first network transmission / reception unit 31 receives the first message from the first ECU 10 and transmits the first message to the first ECU 10 via the first network 15. In the present embodiment, the first network transmission / reception unit 31 is a CAN communication controller. The second network transmission / reception unit 32 receives the second message from the second ECU 20 and transmits the second message to the second ECU 20 via the second network 25. In the present embodiment, the second network transmission / reception unit 32 is an Ethernet communication controller.

The communication relay unit 33 converts the first message received via the first network 15 into a second message and transmits it to the second network 25. Further, the communication relay unit 33 converts the second message received via the second network 25 into the first message and transmits it to the first network 15.

Specifically, when the communication relay unit 33 transmits the first message received via the first network 15 to the second network 25, one for each second message, as shown in FIG. The above first message is stored. That is, the communication relay unit 33 combines (that is, packs) one or more first messages to generate a second message.

Further, when the communication relay unit 33 transmits the second message received via the second network 25 to the first network 15, the communication relay unit 33 decomposes one second message into one or more first messages ( That is, unpacking).

<1-2. Relay device>
Next, a specific configuration of the relay device 30 will be described with reference to FIG. The relay device 30 includes a Basic Software (hereinafter, BSW) 400 as an AUTOSAR standard module and a user application 450. AUTOSAR is a registered trademark.

The BSW400 includes CanDrv41, CanIf42, PduR43, COM44, RTE45, SoAd47, TcpIp48, EthIf49, and EthDrv50.

CanDrv41 is a driver for sending and receiving CAN messages. CanIf42 is an interface for using CAN messages. When sending a message from the first network 15 to the second network 25, the CanDrv41 removes the ID (for example, 100) and the header from the CAN message, and adds a protocol data unit (hereinafter, 200) that is not related to the protocol (hereinafter, 200). PDU) is generated.

The PduR43 is a module for routing PDUs. In this embodiment, the PduR43 relays the PDU to SoAd47 for storage and relays the PDU to SW-C46 for notification.

COM44 is a module that handles signals contained in the PDU. The RTE 45 is a module that connects the BSW 400 and the user application 450, and is an execution environment provided for the user application 450 to use the AUTOSAR platform.

SoAd47 is a module that manages sockets. When sending a message from the first network 15 to the second network 25, the SoAd 47 selects a socket according to the ID of the PDU relayed from the PduR43. TcpIp48 manages port numbers and IP addresses. When sending a message from the first network 15 to the second network 25, the TcpIp48 distributes the PDU relayed from the PduR43 to the buffer of the socket selected by SoAd47.

EthIf49 is an interface for using Ethernet messages. When sending a message from the first network 15 to the second network 25, EthIf49 generates an Ethernet message by attaching the MAC address of the destination and the source to the socket relayed from TcpIp48. EthDrv50 is a driver for sending and receiving Ethernet messages.

The user application 450 includes a relay control unit 46 (hereinafter, SW-C). The SW-C46 includes a vehicle mode detection unit 51, a communication load monitoring unit 52, and a relay table 53, and receives a notification PDU as a signal.

The vehicle mode detection unit 51 detects the state of the vehicle from the vehicle speed sensor signal and the brake sensor signal of the received signal. Specifically, the vehicle mode detection unit 51 detects whether the state of the vehicle is any of a stopped mode, a traveling mode, and a stopped diag mode. The stop mode is a state in which the ignition is on and the vehicle is not running. The diagnostic mode is a state in which the vehicle is diagnosed at a service station or the like.

The communication load monitoring unit 52 monitors communication statistical information (for example, communication load) in the first network 15 and the second network 25 based on the signal transmission frequency and the like.
The relay table 53 is a table for dynamically setting a method for relaying a message from the first network 15 to the second network 25. The details of the relay table 53 will be described later.

The SW-C46 selects the size threshold value and the timer threshold value to be used from the relay table 53 according to at least one of the information other than the information handled in the communication and the signal information, and dynamically relays the relay method during the communication operation. Set. The information other than the information handled in communication is not the signal information itself, but the information obtained by processing the signal information, that is, the information detected or calculated based on the signal information, for example, the state of the vehicle or the statistical information of communication. is there.

Further, SW-C46 calculates the data size from the received signal information. Further, SW-C46 compares the deadline time set in advance for the signal with the timer threshold value set in the buffer of the second message storing this signal, and reaches the smaller value (that is, earlier). The timer threshold of the second message is updated to (the value of the one).

Then, the SW-C46 transmits the second message to the second network 25 when any of the conditions (A) to (C) for determining the transmission of the second message is satisfied. (A) The data size of the second message has reached the set size threshold. (B) The elapsed time from the start of storing the PDU corresponding to the first first message in the buffer of the second message has reached the timer threshold set in the buffer of the second message. (C) The PDU corresponding to the first message having the trigger ID has been received. When any one of the conditions (A) to (C) is satisfied, the SW-C46 transmits the signal included in the transmission trigger via the RTE45.

The transmission trigger is a PDU corresponding to the first message having a specific preset trigger ID. The BSW400 is provided with a mechanism for immediately transmitting a second message when a transmission trigger is stored. Therefore, the SW-C46 can dynamically set the relay method by changing the size threshold value and the timer threshold value according to the situation.

On the other hand, as shown in FIG. 4, in the conventional relay device 300, the PDU for storage is only relayed from the PduR43 to the SoAd 47, and the PDU for notification is not transmitted to the user application 450. .. Therefore, the size threshold value and the timer threshold value are fixed at preset values, are not changed according to the situation, and the relay method is fixed.

<2. Relay method>
<2-1. Overview of relay method>
Next, a relay method in the case of relaying a message from the first network 15 to the second network 25 will be described.

As shown in FIG. 5, one of the relay methods includes one-to-one conversion. That is, the PDU corresponding to one first message is stored in the buffer for one second message, and the second message is transmitted.

Further, as another relay method, as shown in FIG. 6, there is a conversion in which the PDUs corresponding to N first messages are stored in the buffer for one second message. N is a natural number. Then, when either of the above-mentioned conditions (A) and (B) is satisfied, the second message is transmitted. That is, when the data size of the buffer reaches the size threshold value, or when the elapsed time from the start of storage of the first PDU reaches the timer threshold value of the buffer, the second message is transmitted. The timer threshold value here is a value preset for the buffer regardless of the PDU stored in the buffer. A timer that uses such a timer threshold is called a fixed timer.

FIG. 7 shows how a second message is transmitted when the elapsed time reaches the timer threshold value. The elapsed time reaches the timer threshold when the PDU corresponding to the first message with ID: 100 is stored in the buffer and the PDU corresponding to the first message with ID: 102 is stored in the buffer. , The data stored in the buffer is transmitted as the second message.

Further, FIG. 8 shows how a second message is transmitted when the data size of the buffer reaches the size threshold value. The PDU corresponding to the first message with ID: 100 is sequentially stored in the buffer, and when the PDU corresponding to the first message with ID: 101 is stored in the buffer, the data size of the buffer reaches the size threshold value. The data stored in the buffer is transmitted as the second message. The PDU corresponding to the first message of ID: 102 following the PDU corresponding to the first message of ID: 101 is stored in the next buffer.

Further, as another one of the relay methods, as shown in FIG. 9, there is a conversion in which the PDUs corresponding to N first messages are stored in the buffer for one second message. Then, when either of the above-mentioned conditions (A) and (B) is satisfied, the second message is transmitted. That is, when the data size of the buffer reaches the size threshold value, or when the elapsed time from the start of storage of the PDU corresponding to the first first message reaches the timer threshold value of the buffer, the second message is transmitted. To do. The timer threshold value here is a value updated according to the PDU corresponding to the first message stored in the buffer. Specifically, the timer threshold value of the buffer is set to the value of the deadline set for each PDU corresponding to the first message and the timer threshold value set for the buffer, whichever is shorter in time to reach. Will be updated. A timer that uses such a timer threshold is called a variable timer. The case where the data size of the buffer reaches the size threshold is the same as in FIG.

FIG. 10 shows how the timer threshold is updated according to the deadline set in the PDU corresponding to each first message, and the second message is transmitted when the elapsed time reaches the updated timer threshold. Shown.

Further, as another one of the relay methods, as shown in FIG. 11, there is a conversion in which the PDUs corresponding to the N first messages are stored in the buffer for one second message. Then, when any of the above-mentioned conditions (A) to (C) is satisfied, the second message is transmitted. That is, when the data size of the buffer reaches the size threshold value, or when the elapsed time from the start of storage of the PDU corresponding to the first first message reaches the timer threshold value of the buffer, or the first trigger ID. When the transmission trigger, which is the PDU corresponding to one message, is stored in the buffer, the second message is transmitted. The timer threshold value here is a value updated according to the PDU corresponding to the first message stored in the buffer.

FIG. 12 shows how the second message is transmitted when the PDU corresponding to the first message of ID: 102, which is the trigger ID, is stored in the buffer. The case where the data size of the buffer reaches the size threshold is the same as in FIG. 8, and the elapsed time from the start of storage of the PDU corresponding to the first first message reaches the timer threshold of the buffer. Is the same as in FIG.

In the conventional fixed relay method, as shown in FIG. 15, the timer threshold value of the fixed timer, the initial value of the timer threshold value of the variable timer, and the size threshold value are fixed values. Therefore, as shown in FIG. 16, conventionally, even if the vehicle state changes between the stopped mode, the traveling mode, and the diagnostic mode, the timer threshold value of the fixed timer, the initial value of the timer threshold value of the variable timer, and the size threshold value are constant. It was fixed to.

On the other hand, in the variable relay method of the present embodiment, as shown in FIG. 13, the timer threshold value of the fixed timer, the initial value of the timer threshold value of the variable timer, and the size threshold value are variable. Specifically, in the variable relay method of the present embodiment, the timer threshold of the fixed timer, the initial value of the timer threshold of the variable timer, and the size threshold are among the signal information included in the vehicle state, the communication load, and the first message. It is set according to at least one. In the present embodiment, the timer threshold value of the fixed timer, the initial value of the timer threshold value of the variable timer, and the size threshold value are set according to the vehicle state and / or the communication load and the signal information included in the first message. ..

<2-2. Setting the relay method according to the vehicle condition>
FIG. 14 shows how the timer threshold value of the fixed timer, the initial value of the timer threshold value of the variable timer, and the size threshold value are dynamically set according to the vehicle state. Similar messages are shown in the same hatch.

When the vehicle state is the stopped mode, the message transmission frequency is low, so the relay method is set so that the low frequency message can be relayed with low delay. Specifically, since the messages are infrequent, it is less necessary to update the timer threshold according to the deadline set for the signal included in the first message. Therefore, in the stop mode, a fixed timer is used. Then, it is more efficient to increase the relay frequency of the second message having a small data size than to send the second message having a large data size. Therefore, as shown in FIG. 14, the size threshold is set to the small of small, medium, and large, and the timer threshold of the fixed timer is set to the small of small, medium, and large.

When the vehicle state is the driving mode, the message transmission frequency is high, so the relay method is set so that the high frequency message can be relayed with low delay. Specifically, since messages are frequently sent and delay requests are often strict, it is essential to update the timer threshold. Therefore, in the traveling mode, a variable timer is used. In addition, a trigger ID is set for an important message so as to be a transmission trigger. If the data size is made too small due to the high transmission frequency, the relay efficiency will decrease. Therefore, as shown in FIG. 14, the size threshold value is set to medium to large with a margin, and the timer threshold value of the variable timer is set. Set the initial value of to medium.

In the diagnostic mode, the frequency of sending messages is high, so set the relay method so that high-frequency messages can be relayed with low delay. In the diagnostic mode, update software and the like are transmitted, so unlike the driving mode, it is necessary to relay multiple messages at once. Therefore, in the diagnostic mode, it is necessary to have a margin in the size threshold value as compared with the traveling mode. Also, in the diagnostic mode, there are regulations such as that each first message must be sent within the specified time, so it is essential to update the timer threshold according to the deadline time set for each first message. Is. Therefore, in the diagnostic mode, a variable timer is used. Then, as shown in FIG. 14, the size threshold value is set large, and the initial value of the timer threshold value of the variable timer is set large.

FIG. 17 shows a table setting example used when setting the relay method according to the vehicle state, and a deadline setting example for each signal ID. The deadline indicates the maximum allowable time from when the corresponding signal is stored in the buffer to when it is transmitted when the variable timer is used.

The table 1 is, for example, a table used in the stop mode. The packing target ID indicates a signal ID to be stored in one second message. Turning off timer update use indicates that a fixed timer is used. In this case, the timer threshold is fixed at 3 ms regardless of the deadline set for each signal ID. However, the trigger ID use is set to on, and the signal ID 100 is set to the trigger ID. Therefore, when the first message of the signal ID 100 is stored in the buffer, the second message is transmitted even if the elapsed time has not reached the timer threshold value and the data size of the buffer has not reached the size threshold value. To.

Further, the table 2 is a table used for, for example, a traveling mode. Turning on timer update use indicates that a variable timer is used. In this case, the initial value of the timer threshold is set to 5 ms. Then, each time a signal is stored in the buffer, the deadline set in the signal stored in the buffer is compared with the timer threshold set in the buffer, and the one that reaches the deadline and the timer threshold first. The timer threshold is updated to the value of. Further, the table 3 is a table used for, for example, a diagnostic mode.

<2-3. Relay method setting according to communication load>
In FIGS. 18 and 19, the timer threshold value of the fixed timer, the initial value of the timer threshold value of the variable timer, and the size threshold value are dynamically set according to the communication load of at least one of the first network 15 and the second network 25. It shows the situation. In the present embodiment, the size threshold value is dynamically set according to the communication load of the first network 15. Similar messages are shown in the same hatch.

When the communication load is low, medium, or large, the frequency of message transmission is low. Therefore, set the relay method so that low-frequency messages can be relayed with low delay. Specifically, since the messages are infrequent, it is less necessary to update the timer threshold according to the deadline set for the signal included in the first message. Therefore, when the communication load is low or medium, a fixed timer is used. Then, it is more efficient to increase the relay frequency of the second message having a small data size than to send the second message having a large data size. Therefore, as shown in FIG. 18, the size threshold value is set to a small value, and the timer threshold value of the fixed timer is set to a small value.

When the communication load is heavy, the frequency of sending messages is high, so set the relay method so that high-frequency messages can be relayed with low delay. Specifically, since it is necessary to relay a plurality of messages together, it is necessary to allow a margin for the size threshold. In addition, a variable timer is used to respond to the delay request. Therefore, as shown in FIG. 18, the size threshold value is set large, and the initial value of the timer threshold value of the variable timer is set large.

Further, as shown in FIG. 19, a first load threshold value and a second load threshold value may be set in order to suppress a delay in switching the relay method due to the calculation time of the communication load and frequent switching of the relay method. The first load threshold value is a threshold value for determining that the communication load tends to increase, and the second load threshold value is a threshold value for determining that the communication load tends to decrease. Then, when the communication load rises from a value lower than the first load threshold value to a value higher than the first load threshold value, the size threshold value is greatly changed, and the fixed timer is changed to the variable timer to change the timer threshold value. The initial value of may be set to large. When the communication load drops from a value higher than the second load threshold value to a value lower than the second load threshold value, the size threshold value is changed to a small value, and the variable timer is changed to a fixed timer to change the timer threshold value. May be set to small.

In FIG. 19, the threshold value between the communication load and the communication load high is set as the first load threshold value, and the threshold value between the communication load and the communication load low is set as the second load threshold value, but the present invention is not limited thereto. The threshold value when the communication load switches from medium to high is set as the first threshold value, the threshold value when the communication load switches from medium to low is set as the second threshold value, and the threshold value when the communication load switches from high to medium is set as the third threshold value. The threshold value when the communication load is switched from low to medium may be set as the fourth threshold value. The thresholds are in the order of the first threshold, the third threshold, the fourth threshold, and the second threshold (first threshold> third threshold> fourth threshold> second threshold). By doing so, it is possible to further suppress frequent switching of the relay method.

<2-4. Setting the relay method according to the signal information>
20 and 21 show an example of setting on / off of table switching used when setting a relay method according to signal information, and a table switching mode. As shown in FIG. 20, when the table switching by the signal value is set to ON in each table, the table to be used is switched according to the signal value as shown in FIG. For example, if the signal value is greater than 100, Table 3 is used. If the signal value is smaller than 100, the table 2 is used, and if the signal value is 10 or more and 100 or less, the table 1 is used.

<3. Relay processing>
Next, the procedure of the variable relay type relay processing executed by the relay device 30 according to the present embodiment will be described with reference to the sequence diagram of FIG.

First, in S10, SW-C46 performs relay method switching determination and execution processing. Details of the relay method switching determination and execution processing will be described later.
In S20, the communication controller 31 receives the CAN frame. In S30, the received CAN frame is transmitted from the communication controller 31 to the CanDrv41 as a reception notification. In S40, the received CAN frame is transmitted from CanDrv41 to CanIf42 as a reception notification. In S50, the PDU generated from the received CAN frame is transmitted from CanIf42 to PduR43 as a reception notification.

In S60, PduR43 performs relay processing. Specifically, the PduR43 transmits a PDU for notification to COM44 as a reception notification, and transmits a PDU for storage to SoAd47 as a transmission request.

In S70, SoAd47 stores the received PDU in a temporary buffer for packing. In S80, SoAd47 transmits the return value for the transmission request to PduR43.

In S90, a PDU for notification is transmitted from PduR43 to SW-C46 via COM44 and RTE45 as a reception notification.
On the other hand, in S100, SW-C46 determines that the trigger condition for the timer is satisfied. Specifically, the SW-C46 determines whether or not the elapsed time from the start of storing the PDU in the buffer has reached the timer threshold set in the buffer. When the relay method is a variable timer, the SW-C46 updates the timer threshold value of the buffer by using the deadline set in the signal included in the notification PDU.

Further, in S110, SW-C46 determines that the trigger condition regarding the buffer size is satisfied. Specifically, SW-C46 determines whether or not the data size of the buffer has reached the size threshold. SW-C46 calculates the data size of the current buffer from the data size of the notification PDU received so far as the signal information stored in one buffer. The relay device 30 repeatedly executes the processes S20 to S110 until the PDU corresponding to the CAN frame of the trigger ID is transmitted to SoAd47 and the trigger condition in SoAd47 is satisfied. The trigger condition in the SoAd 47 is satisfied when the SoAd 47 receives the PDU corresponding to the CAN frame of the trigger ID.

Subsequently, in S120, when the trigger condition in S100 or S110 is satisfied, the CAN frame of the trigger ID is transmitted from SW-C46 to SoAd47 via RTE45, COM44, and PduR43 as a transmission request.

In S130, SoAd47, TcpIp48, EthIf49, EthDv50, and the communication controller 31 execute the Ethernet transmission process. The details of the Ethernet transmission process will be described later. Further, in S140, the return value for the transmission request is transmitted from SoAd47 to SW-C46 via PduR43, COM44, and RTE45.

On the other hand, if the CAN frame of the trigger ID is received before the trigger condition is satisfied in S100 and S110, the CAN frame of the trigger ID is transmitted in S150 as in S120. Then, the Ethernet transmission process of S130 is executed, and in S160, the return value for the transmission request is transmitted as in S140.

Next, the relay method switching determination and the execution process (S10) will be described with reference to the sequence diagram of FIG.
In S15, SW-C46 transmits a communication load acquisition request to the communication load monitoring unit 52. In S25, the communication load monitoring unit 52 acquires the communication load of the first network 15, and transmits the acquired communication load to the SW-C46 as a communication load acquisition response.

In S35, SW-C36 transmits a vehicle mode acquisition request to the vehicle mode detection unit 51. In S45, the vehicle mode detection unit 51 acquires the vehicle mode and transmits the acquired vehicle mode to the SW-C46 as a vehicle mode acquisition response.

In S550, the SW-C46 determines whether or not the relay method switching condition is satisfied based on the received communication load and the vehicle mode. That is, it is determined whether or not the communication load or the vehicle mode has changed.

When the relay method switching condition is satisfied in S55, SW-C46 switches the relay method in S65. That is, at least one of the size threshold value and the initial value of the timer threshold value of the fixed timer or the timer threshold value of the variable timer is changed. On the other hand, if the relay method switching condition is not satisfied in S55, the relay method switching determination and execution process are terminated.

Next, the Ethernet transmission process (S130) will be described with reference to the sequence diagram of FIG. 24.
In S135, a buffer allocation request is transmitted from SoAd47 to EthDrv50 via TcpIp48 and EthIf49.

In S145, EthDrv50 allocates a transmission buffer. Subsequently, in S155, the return value for the buffer allocation request is transmitted from EthDrv50 to SoAd47 via EthIf49 and TcpIp48.

In S165, EthDrv50 copies the data of the temporary buffer of SoAd47 to the secured transmission buffer, sets the header information including the MAC address and the frame type in the transmission buffer, and generates the second message.

Subsequently, in S175, the transmission request of the transmission buffer is transmitted from SoAd47 to the communication controller 31 via TcpIp48, EthIf49, and EthDrv50.
In S185, the communication controller 31 transmits the second message to the second network 25. In S195, the return value for the transmission request is transmitted from the communication controller 31 to SoAd47 via EthDrv50, EthIf49, and TcpIp48.

Next, for comparison with the variable relay type relay processing according to the present embodiment, the procedure of the conventional fixed relay type relay processing will be described with reference to the sequence diagram of FIG. 25.
In S200 to S230, the same processing as in S20 to S50 shown in FIG. 22 is performed.

In S240, PduR43 performs relay processing. Specifically, the PduR43 transmits the PDU for storage to the SoAd 47 as a transmission request, but unlike the present embodiment, the PUD for notification is not transmitted to the COM 44.

In S250, SoAd47 stores the received PDU in a temporary buffer for packing. In S260, SoAd47 transmits the return value for the transmission request to PduR43. Then, as in the present embodiment, the Ethernet transmission process of S130 is executed.

In the relay process according to the present embodiment, unlike the conventional relay process, not only the PDU for storage is transmitted to SoAd47, but also the PDU for notification is transmitted to SW-C46. Therefore, in the relay processing according to the present embodiment, the size threshold value and the tie threshold value are dynamically changed during the communication operation by using the PDU for notification while using the AUTOSAR standard module as in the conventional relay processing. Can be done.

<4. Effect>
According to the present embodiment described above, the following effects can be obtained.
(1) The relay method is dynamically set during the communication operation according to at least one of the vehicle information, the communication load, and the signal information of the first message stored in the second message. Therefore, flexible relay processing according to dynamic conditions can be realized.

(2) The vehicle state is detected, and the timer threshold value and the size threshold value can be set according to the detected vehicle state. As a result, it is possible to realize relay processing suitable for the transmission frequency of messages according to the vehicle condition.

(3) The communication load is monitored, and the timer threshold value and the size threshold value can be set according to the communication load. As a result, relay processing suitable for the frequency of message transmission according to the communication load can be realized.

(4) The size threshold and the timer threshold are dynamically set. Thereby, the conditions for determining the transmission of the second message can be changed according to at least one of the vehicle condition, the communication load, and the signal information of the first message, and flexible relay processing can be realized. ..

(Other embodiments)
Although the embodiment for carrying out the present disclosure has been described above, the present disclosure is not limited to the above-described embodiment, and can be implemented in various modifications.

(A) In the above embodiment, the first message is a CAN message and the second message is an Ethernet message, but the present disclosure is not limited thereto. The present disclosure can be applied as long as the first message and the second message satisfy the relationship that the payload of the first message is shorter than the payload of the second message.

(B) A plurality of functions possessed by one component in the above embodiment may be realized by a plurality of components, or one function possessed by one component may be realized by a plurality of components. You may. Further, a plurality of functions possessed by the plurality of components may be realized by one component, or one function realized by the plurality of components may be realized by one component. .. Further, a part of the configuration of the above embodiment may be omitted. In addition, at least a part of the configuration of the above embodiment may be added or replaced with the configuration of the other above embodiment.

(C) In addition to the above-mentioned in-vehicle communication relay device, a communication in-vehicle network system having the in-vehicle communication relay device as a component, a program for operating a computer as the in-vehicle communication relay device, a semiconductor memory recording this program, and the like. The present disclosure can also be realized in various forms such as a non-transitional actual recording medium and a communication relay method.

15 ... 1st network, 25 ... 2nd network, 30 ... Relay device, 400 ... BSW, 450 ... User application.

Claims (5)

An in-vehicle communication relay device that relays data communication between a plurality of electronic control devices (10, 20) via a first network (15) and a second network (25).
A storage unit (400) configured to store one or more first messages on the first network in one second message on the second network.
The relay method for relaying the second message to the second network is dynamically performed during the communication operation according to at least one of the information other than the information handled in the communication and the first message stored in the second message. A setting unit (450) configured to set, and
In-vehicle communication relay device. The setting unit is configured to dynamically set the relay method during a communication operation according to information other than the communication and the first message stored in the second message.
The in-vehicle communication relay device according to claim 1. The setting unit dynamically sets the relay method during the communication operation according to at least information other than the information handled in the communication.
Information other than the information handled in the communication includes the state of the vehicle on which the in-vehicle communication relay device is mounted.
The in-vehicle communication relay device according to claim 1 or 2. The setting unit dynamically sets the relay method during the communication operation according to at least information other than the information handled in the communication.
Information other than the information handled in the communication includes statistical information of communication in at least one of the first network and the second network.
The vehicle-mounted communication relay device according to any one of claims 1 to 3. The relay method includes a condition for determining the transmission of the second message.
The conditions are that the data size of the second message reaches the size threshold value and the elapsed time from the start of storing the first message in the second message reaches the timer threshold value of the second message. Including that
The setting unit is configured to dynamically set the size threshold value and the timer threshold value.
The vehicle-mounted communication relay device according to any one of claims 1 to 4.