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Electronic control unit, communication method, and vehicle-mounted network system

An electronic control unit, vehicle network technology, applied in the direction of bus network, electrical components, transmission system, etc., can solve problems such as being unsuitable for data transmission

Active Publication Date: 2021-03-02
PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In CAN, the data that can be sent by one frame (standard format data frame) is less than or equal to 8 bytes, so it is not suitable for the transmission of data with a large amount of data, such as images captured by vehicle cameras.

Method used

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  • Electronic control unit, communication method, and vehicle-mounted network system
  • Electronic control unit, communication method, and vehicle-mounted network system
  • Electronic control unit, communication method, and vehicle-mounted network system

Examples

Experimental program
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Embodiment approach 1

[0063]Hereinafter, as an embodiment of the present disclosure, an in-vehicle network system 10 including a plurality of electronic control units (ECUs) and a hub (HUB) for transmitting and receiving (exchanging) data in an in-vehicle network will be described using the drawings.

[0064][1.1 The overall composition of the vehicle network system 10]

[0065]figure 1 It is a diagram showing an in-vehicle network 11 including two networks in an in-vehicle network system 10.

[0066]The vehicle 9 is equipped with various devices such as control devices, sensors, actuators, user interface devices, and electronic control units (ECUs). The in-vehicle network system 10 is a network communication system having an in-vehicle network 11 that cooperates with various devices such as sensors and ECUs mounted on the vehicle 9 to exchange information. The in-vehicle network 11 is configured to include: a control system network 1 (first network), which complies with the CAN (Controller Area Network) protocol...

Embodiment approach 2

[0178]Hereinafter, the in-vehicle network system 10 shown in the first embodiment (refer tofigure 2 An example obtained by partially deforming the configuration of) will be described.

[0179][2.1 Composition of vehicle network system 10a]

[0180]Figure 20 It is a figure which shows the schematic structure of the in-vehicle network system 10a. The HUB 200 in the in-vehicle network system 10 shown in the first embodiment is connected to one CAN bus in the control system network 1. In contrast, such asFigure 20 As shown, in the in-vehicle network system 10a, the HUB200a obtained by partially deforming the HUB200 is connected to two buses in the control system network 1a, that is, the bus 30a (CAN bus 1) and the bus 30b (CAN bus 2). Among the constituent elements of the in-vehicle network system 10a, the same constituent elements as the in-vehicle network system 10 are described inFigure 20 Indicated withfigure 2 The description of the same reference numerals is omitted here. In addition, r...

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Abstract

X-ECU (100) has: a receiving unit (110a), which receives frames from the CAN bus one by one and stores them in the receiving buffer (120a); a receiving unit (110b), which receives frames from the second network one by one and sends them to the receiving buffer The device (120b) saves it; the generation unit (130) refers to the data in each receiving buffer, and sequentially generates the first type of data as the data used for driving control of the vehicle and the first type of data used as data other than the driving control of the vehicle. The 2nd kind of data, various data are stored in sending buffer (140a) and sending buffer (140b) respectively; Some kind of data among various data.

Description

Technical field[0001]The present disclosure relates to a message processing technology used for the transceiving (transmitting and receiving) of messages in an in-vehicle network including a plurality of networks with different characteristics.Background technique[0002]In recent years, many devices called electronic control units (ECUs: Electronic Control Units) have been deployed in the systems of automobiles. The network connecting these ECUs is called an in-vehicle network. There are multiple standards for in-vehicle networks. As one of the most mainstream in-vehicle networks, there is a CAN (Controller Area Network) standard specified by ISO11898-1. In CAN, each ECU (node) connected to a bus (Bus) as a wired transmission path transmits and receives frames (messages). In addition, there is no identifier indicating the destination (receiver) and / or the source of transmission in CAN, and the sending node adds an ID (CAN-ID) to each frame and transmits (that is, sends a signal to th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/46
CPCH04L12/40143H04L12/40H04L67/12H04L2012/40215H04L2012/40273H04L12/4625H04L12/46
Inventor 佐佐木崇光芳贺智之前田学松岛秀树
Owner PANASONIC INTELLECTUAL PROPERTY CORP OF AMERICA