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Transmission message generating device and vehicle on-board transmission system

A technology for generating devices and sending messages, which is applied in transmission systems, digital transmission systems, vehicle components, etc., and can solve problems such as traffic constraints

Inactive Publication Date: 2014-07-30
AUTONETWORKS TECH LTD +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a CAN protocol, the number of communication devices that can be connected to one bus is set to an upper limit, and is further restricted by the communication volume of the bus, etc.

Method used

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  • Transmission message generating device and vehicle on-board transmission system
  • Transmission message generating device and vehicle on-board transmission system
  • Transmission message generating device and vehicle on-board transmission system

Examples

Experimental program
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Embodiment Construction

[0061] Hereinafter, the present invention will be specifically described based on the drawings showing the embodiment. figure 1 It is a block diagram showing the configuration of the in-vehicle communication system of this embodiment. In addition, in figure 1 In , the communication line is represented by a solid line, and the power supply line is represented by a dotted line. Reference numeral 1 indicated by a one-dot chain line in the figure is a vehicle, and a plurality of ECUs 7 that perform running control of the vehicle 1 and the like are mounted thereon. A plurality of ECU7 is divided into several ( figure 1 3) groups in the middle are connected with a shared communication line by group. A plurality of communication lines are connected to the frame generator 3 , and communication between different groups is performed via the frame generator 3 . Communication between the ECUs 7 in the same group may be performed directly via a shared communication line, or may be perf...

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PUM

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Abstract

Provided are a transmission message generating device and a vehicle on-board transmission system that can reduce unnecessary sending and receiving of messages between communication devices, as well as preventing information leakage to the outside, or improper intrusion from the outside. Each ECU (7) transmits a frame to a frame generator (3), whereupon the frame generator (3) disassembles the data contained in the received frames, and stores messages of each type in a buffer memorys. The frame generator (3) generates and transmits a message containing data to be transmitted to each ECU (7). According to the state of a signal indicating a power supply state, the frame generator (3) controls enabling / disabling of the transmission process in such a way that frames are not transmitted to ECU (7) not being supplied with power by a power supply control unit (5). In a case in which an abnormal frame has been received by any communication portion, the frame generator (3) does not include the data contained in frames subsequently received by this communication portion, in frames generated for sending to other communication portions.

Description

technical field [0001] The present invention relates to an in-vehicle communication system in which a plurality of communication devices mounted on a vehicle transmit and receive messages with each other, and a transmission message generation device capable of reducing communication traffic and improving reliability through the in-vehicle communication system. Background technique [0002] Conventionally, a vehicle has mounted a plurality of communication devices such as ECUs (Electronic Control Units) having a communication function, and by exchanging messages between the plurality of communication devices, various control processes in the vehicle can be realized. The CAN (Controller Area Network, Controller Area Network) protocol is widely used for communication within the vehicle. The CAN protocol communication system is a bus-type network structure in which a plurality of communication devices share a communication line. As the CAN protocol, the number of communication ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/46B60R16/02B60R16/023H04L12/28
CPCH04L12/40039H04L2012/40273H04L12/12Y02D30/50H04L47/12
Inventor 堀端启史山本秀树
Owner AUTONETWORKS TECH LTD
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