KR20200030167A - Ethernet controller for vehicle, ethernet network including the same and method of communication between can communicationi protocol and the same - Google Patents

Abstract

Disclosed is an Ethernet controller for a vehicle comprising: a protocol conversion module for converting a message of a CAN communication protocol into a message of an Ethernet protocol; a frame type determination module for determining whether a format of a received message is converted and whether a frame corresponding to the received message is a single type or a multi-type; a frame order determination module for determining a reception order of a multi-type frame when the frame corresponding to the received message is determined as the multi-type frame by the frame type determination module; a data accumulation module for accumulating and storing messages when it is determined that the messages are received in an order preset by the frame order determination module and terminating message reception when a message corresponding to a frame of the last order is stored; and a flow control message transmission module for writing a flow control message when a message corresponding to a first frame of the multi-type frame is transmitted by the frame order determination module and transmitting the written flow control message to a communication target CAN communication protocol communication device.

Description

ETHERNET CONTROLLER FOR VEHICLE, ETHERNET NETWORK INCLUDING THE SAME AND METHOD OF COMMUNICATION BETWEEN CAN COMMUNICATIONI PROTOCOL AND THE SAME}

The present invention relates to a vehicle Ethernet controller, a vehicle Ethernet network including the same, and a communication method with a CAN communication protocol using the same, more specifically, for converting a CAN communication signal and communicating with a device that complies with the CAN communication protocol. The present invention relates to a vehicle Ethernet controller capable of supporting a flow control function applied in a communication method and a communication method with a CAN communication protocol using the same.

CAN (Controller Area Network) communication is a standard communication standard designed for microcontrollers or devices to communicate with each other without a host computer in a vehicle. CAN communication is a message-based protocol and has recently been used not only in vehicles, but also in industrial automation equipment and medical equipment.

In recent years, as a consumer's demand for a high-speed / large-capacity network increases, the Ethernet protocol has been applied as a vehicle network protocol.

 Accordingly, when a gateway based on the Ethernet protocol is mounted on a vehicle, there is a need for a technology that enables efficient message transmission with a CAN communication protocol.

For example, in order to diagnose a controller using an in-vehicle Ethernet protocol using a vehicle diagnostic device using a CAN communication protocol, the gateway provided between the vehicle diagnostic device and the Ethernet controller simply bypasses the message, and communication between the two is achieved. Can't lose.

In addition, in the CAN communication protocol, the first frame is transmitted from the transmitting side to the receiving side, and the continuous message transmission rule is transmitted from the receiving side to the transmitting side through Flow Control. Subsequently, the remaining message is transmitted in a continuous frame according to the transmission rule received through the flow control at the transmitting side. However, the Ethernet protocol is based on packet communication, not frame, and does not have the same function as flow control. Therefore, the diagnostic device to transmit the message does not receive the message through the flow control, so a problem occurs that the subsequent frame cannot be transmitted after the first frame is transmitted.

The above descriptions as background arts are only for improving understanding of the background of the present invention, and should not be taken as an admission that they correspond to the prior arts already known to those skilled in the art.

KR 10-1536141 B KR 10-1591225 B

Accordingly, the present invention is to convert a CAN communication signal for communication with a device that conforms to the CAN communication protocol, a vehicle Ethernet controller capable of supporting a flow control function applied in CAN communication, a vehicle Ethernet network including the same, and To solve the problem of providing a communication method with a used CAN communication protocol.

The present invention as a means for solving the above technical problem,

A protocol conversion module for converting the message of the CAN communication protocol into a message of the Ethernet protocol;

A frame type determination module for determining whether the received message is in a format conversion and whether a frame corresponding to the received message is a single type or a multi-type;

A frame order determination module that determines a reception order of multi-type frames when a frame corresponding to a message received by the frame type determination module is determined to be a multi-type frame;

A data accumulation module configured to accumulate and store messages and end message reception when messages corresponding to frames in the last order are stored when it is determined that the messages are received in a predetermined order by the frame order determination module; And

A flow control message transmission module that creates a flow control message and transmits it to a communication target CAN communication protocol communication device when a message corresponding to the first frame of the multi-type frame is transmitted by the frame order determination module;

It provides a vehicle Ethernet controller comprising a.

In one embodiment of the present invention, the protocol conversion module may operate at a gateway of an in-vehicle Ethernet network.

In one embodiment of the present invention, the frame type determination module may determine whether a frame corresponding to the received message is a single type or a multi-type when the received message is a format-converted message of a CAN communication protocol. .

In one embodiment of the present invention, when the frame type determination module determines that the frame corresponding to the received message is a single type, the data accumulation module may store the message of the single type frame and end message reception. .

In one embodiment of the present invention, the data accumulation module may deliver the entire accumulated message to a protocol data unit (PDU) after completing the message reception.

In one embodiment of the present invention, when it is determined that the message received by the frame order determination module is a message corresponding to the first frame, the flow control message transmission module determines the length of the entire message stored in the message corresponding to the first frame. Based on the information on the information, a flow control message configured to set the number of consecutive frames for transmitting the entire message and the transmission time interval between the continuous frames may be transmitted to the communication target CAN communication protocol communication device.

The present invention as another means for solving the above technical problem,

A vehicle gateway including the Ethernet controller of claim 1; And

It includes a vehicle component controller including the Ethernet controller of claim 1,

When receiving a message from an external CAN communication protocol communication device, the protocol conversion module in the vehicle gateway controller converts the format of the received CAN communication protocol message into an Ethernet protocol message and provides it to the vehicle component controller. And

The flow control message transmission module in the vehicle component controller creates a flow control message and transmits it to the external CAN communication protocol communication device when the frame corresponding to the message received from the vehicle gateway is the first frame of the multi-type frame. It provides a vehicle Ethernet network.

The present invention as another means for solving the above technical problem,

A method for a vehicle controller communicating using an Ethernet protocol to communicate with a CAN communication protocol communication device,

Determining whether the message received by the vehicle controller has converted the format of a CAN communication protocol message into a message of an Ethernet protocol;

Determining whether a frame corresponding to the received message is a single type or a multi-type when the received message is format converted;

Determining whether the received message corresponds to the first frame of the multi-type frame when the frame corresponding to the received message is determined to be a multi-type frame;

If the received message corresponds to the first frame of the multi-type frame, generating a flow control message and transmitting the generated flow control message to the communication target CAN communication protocol communication device that transmitted the CAN communication protocol message;

It provides a communication method with the CAN communication protocol, including.

According to an embodiment of the present invention, when it is determined that a frame corresponding to the received message is a multi-type frame, accumulating and storing the received message;

If the frame corresponding to the received message is determined to be a multi-type frame, determining whether the received message corresponds to the last frame of the multi-type frame; And

When the received message is the last frame of the multi-type frame, the method may further include transmitting the entire accumulated message to a protocol data unit (PDU) by completing the message reception and storing the accumulated message.

According to the vehicle Ethernet controller, a vehicle Ethernet network including the same, and a communication method with the CAN communication protocol using the same, it is possible to enable transmission of a large message from a communication device of the CAN communication protocol to a controller connected to the Ethernet network in the vehicle.

In particular, the vehicle Ethernet controller, a vehicle Ethernet network including the same, and a communication method with the CAN communication protocol using the same, add only a module for transmitting messages in controllers constituting an existing network without changing the network topology or communication specifications. By enabling communication between the CAN communication protocol and the Ethernet protocol, a flexible network design is possible and restrictions on future network topology configuration can be reduced.

The effects obtainable in the present invention are not limited to the above-mentioned effects, and other effects not mentioned can be clearly understood by those skilled in the art from the following description. to be.

1 is a diagram briefly showing an Ethernet network environment in a vehicle to which an Ethernet controller according to an embodiment of the present invention is applied.
2 is a block diagram of an Ethernet controller according to an embodiment of the present invention.
3 is a diagram illustrating an example of an Ethernet stack of the AUTOSAR standard to which an Ethernet controller according to an embodiment of the present invention is applied.
4 is a flowchart showing a communication method with a CAN communication protocol using an Ethernet controller according to an embodiment of the present invention.

Hereinafter, a vehicle Ethernet controller according to various embodiments of the present invention and a communication method with a CAN communication protocol using the same will be described in more detail with reference to the accompanying drawings.

1 is a diagram briefly showing an Ethernet network environment in a vehicle to which an Ethernet controller according to an embodiment of the present invention is applied. In particular, FIG. 1 shows communication between a communication device (for example, a diagnostic device, etc.) 201 using a CAN communication protocol connected to a vehicle outside the vehicle and a gateway 101 and a controller 103 of an Ethernet network provided in the vehicle. An example of this is shown.

Referring to Figure 1, the Ethernet network according to an embodiment of the present invention to control the individual components that make up the vehicle and the gateway 101 to receive a communication message to the controller 103 for controlling the appropriate individual components. It may include a controller 103 provided for. In FIG. 1, only one controller 103 is connected to the gateway 101, but a plurality of controllers 103 may be connected to one gateway 101.

The Ethernet controller according to an embodiment of the present invention may correspond to the gateway 101 and the controller 103 of the Ethernet network provided in the vehicle. That is, the gateway 101 and the controller 103 can convert a CAN communication signal for communication with a device conforming to the CAN communication protocol and support various flow control functions applied in CAN communication. It is a type of Ethernet controller for a vehicle according to an embodiment.

When the communication device 201 using the CAN communication protocol transmits a message to transmit the message to the controller 103, the gateway 101 according to an embodiment of the present invention sends a message according to the CAN communication protocol according to the Ethernet protocol. You can perform format conversion with a message.

In the gateway 101, the format-converted message is delivered to the controller 103, and the controller 103 according to an embodiment of the present invention determines the frame type, frame order, etc. of the format-converted message and, if necessary, flow control. It is possible to process an operation required to communicate with the communication device 201 using a CAN communication protocol, such as sending a message for the communication.

Communication between the communication device 201 using the CAN communication protocol and the gateway 101 and the controller 103 of the Ethernet protocol is made possible by the gateway 101 and the controller 103 including the modules shown in FIG. 2.

2 is a block diagram of an Ethernet controller according to an embodiment of the present invention.

2, the Ethernet controller according to an embodiment of the present invention, the protocol conversion module 11, the frame type determination module 13, the frame order determination module 15, the data accumulation module 17 and the flow control It may include a message transmission module 19.

The protocol conversion module 11 is a module that performs format conversion of a message of a CAN communication protocol into a message of an Ethernet protocol or vice versa. For example, the protocol conversion module 11 can be used in the gateway 101 shown in FIG. 1.

For example, the protocol conversion module 11 is a CAN having a format composed of a CAN header and diagnostic data. Take the frame input  TCP header and EthDiag  It can be converted into an Ethernet frame having a format composed of a header and diagnostic data. Here, the protocol conversion module 11 EthDiag  The header may indicate that the subsequent data in the frame is CAN diagnostic data. In the opposite case  Similarly, the protocol conversion module 11 may take the data after the header in the Ethernet frame format and then combine the CAN headers to create a CAN frame.

The frame type determination module 13 may receive a message in which the format is converted to the Ethernet protocol in the protocol conversion module 11 and determine the type of the frame of the received message.

Since the CAN communication protocol transmits messages on a frame-by-frame basis, messages converted to the Ethernet protocol also become messages corresponding to one frame. The frame type determination module 13 first determines whether the received message is a message converted to a CAN protocol message, and when it is determined that the message is a converted CAN protocol message, the format-converted message is a single type frame or a multi-type message. Determine if it is a frame.

Determining whether the frame type determination module 13 is a message that converts a CAN protocol message can be implemented by checking whether an Ethdiag header is added by the above-described protocol conversion module 11 . Also, to determine whether a single frame or a multi-type top four bytes of the first beonjae based on the CAN protocol data It can be determined by checking the bit value . This is according to the communication protocol for the CAN communication protocol and is already known, so additional detailed description will be omitted.

When the frame of the message received by the frame type determination module 13 is of a single type, the message may be transferred to the data accumulation module described later to accumulate. When the frame of the message received by the frame type determination module 13 is a multi-type, the operation of the frame order determination module 15 described later may be performed.

The frame order determination module 15 checks whether the multi-type frames are sequentially received and, if the order of the received frames is appropriate, delivers the received messages to the data accumulation module 17 to accumulate them.

The data accumulation module 17 excludes data indicating the type and order of the frames from the received message frame, and the meaningful data to be delivered (for example, the external CAN communication device (201 in FIG. 1)) is a diagnostic device. ) Is accumulated, and when the entire data transmission is completed, the entire accumulated frame is transmitted to a protocol data unit (PDU). Here, the PDU may refer to a unit that stores and manages meaningful data by removing data (eg, data such as a header) for the communication protocol from data transmitted through CAN or Ethernet regardless of the communication protocol.

When the flow control message transmission module 19 determines that the message corresponding to the first frame of the multi-type frame is received by the frame order determination module 15, it flows to the CAN communication protocol communication device (201 in FIG. 1). This module sends control messages. In the first frame of the multi-type frame, since the size of the entire message to be transmitted by the CAN communication protocol communication device (201 in FIG. 1) is transmitted, the flow control message transmission module 19 communicates the size of the entire message and CAN in this first frame. In consideration of the maximum number of bytes (8 bytes) that can be transmitted in one frame in the protocol, a flow control message for setting the number of successive frames and the time interval between each successive frame transmission to the CAN communication protocol communication device (201 in FIG. 1) Can deliver.

Each module of the Ethernet controller according to various embodiments of the present invention described above may be included in the Ethernet controller in the form of one integrated module.

FIG. 3 is a diagram illustrating an example of an Ethernet stack of an open automotive standard software architecture (AUTOmotive Open System Architecture: AUTOSAR) to which an Ethernet controller according to an embodiment of the present invention is applied. AUTOSAR is a standardized platform for embedded software for automotive electrical components, and in particular, FIG. 3 shows the Ethernet stack defined in AUTOSAR.

The module 10 named “EthDiag” in FIG. 3 corresponds to one integrated module including each module constituting the Ethernet controller of the present invention described above. In FIG. 1, which briefly shows the Ethernet network of the vehicle, the gateway 101 or the controller 103 may include all Ethernet stacks as shown in FIG. 3. The gateway 101 may serve to simply transfer the message format after converting the format of the message using only the protocol conversion module 11 in the integration module 10. In addition, the controller 103 for controlling individual vehicle parts operates using a frame type determination module 13, a frame order determination module 15, a data accumulation module 17, and a flow control message transmission module 19 can do.

In FIG. 3, reference numeral '110' corresponds to an Ethernet driver through which an Ethernet message is received / transmitted.

In addition, reference numeral '120' denotes an Ethernet interface, and serves to route a message received by the Ethernet driver 110 to a Transmission Control Protocol / Internet Protocol (TCP / IP) stack 130 or to receive a message therefrom. do.

In addition, reference numeral '130' denotes a TCP / IP communication service stack and performs protocol processing of IP, User Datagram Protocol (UDP), and TCP.

Since the paradigm underlying the TCP / IP protocol family is the use of sockets, a socket adapter module 140 may be provided for converting socket-based communication to PDU-based communication and vice versa.

In addition, reference numeral '150' indicates DoIP (Diagnostics over Internet Protocol), and serves to deliver a message transmitted from the socket adapter 140 to the PDU.

The integrated module 10 incorporating the modules constituting the controller according to various embodiments of the present invention receives the message received from the communication device using the CAN protocol from the socket adapter 140, and then operates each module as described above. , In the case of the gateway (101 in FIG. 1), a message may be transmitted to the vehicle component controller (103 in FIG. 1) or in the case of the vehicle component controller 103, the message may be transmitted to the PDU.

4 is a flowchart showing a communication method with a CAN communication protocol using an Ethernet controller according to an embodiment of the present invention as described above. In particular, FIG. 4 illustrates a communication method performed in the controller 103 of individual components in the vehicle Ethernet network of FIG. 1.

Referring to FIG. 4, first, when the controller 103 receives a message (S10), the frame type determination module 13 in the controller 103 determines whether the received message is a message obtained by converting the format of a CAN communication protocol message. (S11).

When the frame type determination module 13 determines that the received message is a message obtained by converting the format of a CAN communication protocol message, the frame type determination module 13 then determines whether the frame of the corresponding message is a single type or multi-type (large-capacity message). ) Is determined (S12).

When the frame type determination module 13 determines that the received message is a single type frame, it stores the received message in the data accumulation module 17, completes the message reception, and the data accumulation module 17 stores the stored single type The message of the frame is transmitted to the PDU (S18).

When the frame type determination module 13 determines that the received message is a multi-type frame, it determines whether the message received by the frame order determination module 15 is the first frame (S13).

When the frame order determination module 15 determines that the received message is the first frame of the multi-type frame, referring to the total length of the message included in the first frame, the number of consecutive frames to receive the entire message and the number of consecutive frames Generates a flow control message that sets the transmission time interval of (S14), and transmits the generated flow control message to a communication device (201 in FIG. 1) using the CAN communication protocol in communication (S15).

Subsequently, the data accumulation module 17 accumulates and stores the received messages in the order determined by the frame order determination module 15 (S16) and accumulates up to the message determined as the last frame by the frame order determination module 15. (S17) The accumulated whole message is transmitted to the PDU and message reception is completed (S18).

As described above, the vehicle Ethernet controller according to various embodiments of the present invention, a vehicle Ethernet network including the same, and a communication method with the CAN communication protocol using the same are connected to an Ethernet network in a vehicle from a communication device of the CAN communication protocol. It is possible to transmit a large message to the controller.

In particular, the vehicle Ethernet controller according to various embodiments of the present invention, a vehicle Ethernet network including the same, and a communication method with the CAN communication protocol using the same, in controllers constituting an existing network without changing a network topology or changing communication specifications. By adding only a module for message transmission to enable communication between CAN and Ethernet protocols, flexible network design is possible and restrictions on network topology configuration can be reduced in the future.

In the above, although shown and described in relation to a specific embodiment of the present invention, it is understood that the present invention can be variously improved and changed within the limits that do not depart from the technical spirit of the present invention provided by the following claims. It will be apparent to those skilled in the art.

11: Protocol conversion module 13: Frame type determination module
15: frame order determination module 17: data accumulation module
19: Flow control message transmission module

Claims (9)

A protocol conversion module for converting the message of the CAN communication protocol into a message of the Ethernet protocol;
A frame type determination module that determines whether a format of the received message is converted and whether a frame corresponding to the received message is a single type or a multi-type;
A frame order determination module that determines a reception order of multi-type frames when a frame corresponding to a message received by the frame type determination module is determined to be a multi-type frame;
A data accumulation module that accumulates and stores messages when the messages are received in a predetermined order by the frame order determination module, and ends receiving messages when messages corresponding to the frames in the last order are stored; And
A flow control message transmission module that creates a flow control message and transmits it to a communication target CAN communication protocol communication device when a message corresponding to the first frame of the multi-type frame is transmitted by the frame order determination module;
Automotive Ethernet controller comprising a. The method according to claim 1,
The protocol conversion module is a vehicle Ethernet controller, characterized in that operating in the gateway of the in-vehicle Ethernet network. The method according to claim 1,
The frame type determination module, if the received message is a message format-converted message of the CAN communication protocol, the vehicle Ethernet controller characterized in that it determines whether the frame corresponding to the received message is a single type or multi-type. The method according to claim 1,
When the frame type determination module determines that the frame corresponding to the received message is a single type, the data accumulation module stores the message of the single type frame and ends receiving the message. The method according to claim 1,
The data accumulation module, the vehicle Ethernet controller, characterized in that after transmitting the message, the accumulated message is transferred to the PDU (Protocol Data Unit). The method according to claim 1,
When the frame order determination module determines that the received message is a message corresponding to the first frame, the flow control message transmission module transmits the entire message based on information on the length of the entire message stored in the message corresponding to the first frame. Ethernet controller, characterized in that for transmitting the flow control message set the number of consecutive frames for transmission and the transmission time interval between the continuous frames to the communication target CAN communication protocol communication device. A vehicle gateway including the Ethernet controller of claim 1; And
It includes a vehicle component controller including the Ethernet controller of claim 1,
When receiving a message from an external CAN communication protocol communication device, the protocol conversion module in the vehicle gateway controller converts the format of the received CAN communication protocol message into an Ethernet protocol message and provides it to the vehicle component controller. And
The flow control message transmission module in the vehicle component controller creates a flow control message and transmits it to the external CAN communication protocol communication device when the frame corresponding to the message received from the vehicle gateway is the first frame of the multi-type frame. Automotive Ethernet network. A method for a vehicle controller communicating using an Ethernet protocol to communicate with a CAN communication protocol communication device,
Determining whether the message received by the vehicle controller has converted the format of a CAN communication protocol message into a message of an Ethernet protocol;
Determining whether a frame corresponding to the received message is a single type or a multi-type when the received message is format converted;
Determining whether the received message corresponds to the first frame of the multi-type frame when the frame corresponding to the received message is determined to be a multi-type frame;
If the received message corresponds to the first frame of the multi-type frame, generating a flow control message and transmitting the generated flow control message to the communication target CAN communication protocol communication device that transmitted the CAN communication protocol message;
Communication method with the CAN communication protocol, including. The method according to claim 8,
Accumulating and storing the received message when the frame corresponding to the received message is determined to be a multi-type frame;
If the frame corresponding to the received message is determined to be a multi-type frame, determining whether the received message corresponds to the last frame of the multi-type frame; And
If the received message is the last frame of the multi-type frame, CAN further comprising the step of transmitting the entire message stored in the PDU (Protocol Data Unit) by the completion of the message received and the cumulative storage step Communication method with communication protocol.

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