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Method for monitoring communication fault of CAN bus node by vehicle-mounted gateway and gateway equipment

A CAN bus and communication failure technology, applied in the field of vehicle communication, can solve the problems of inability to judge normal signals, stability and reliability, etc., and achieve the effect of stable and reliable message forwarding

Active Publication Date: 2021-10-08
DONGFENG MOTOR GRP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

to use figure 1 In the signal route shown, the signal sent by the source network segment, if a message is lost, the gateway will still forward the signal to the target network segment; the receiving node of the target network segment cannot judge whether it is a normal signal or an abnormal signal, which is critical to the stability of the forwarding impact on reliability

Method used

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  • Method for monitoring communication fault of CAN bus node by vehicle-mounted gateway and gateway equipment
  • Method for monitoring communication fault of CAN bus node by vehicle-mounted gateway and gateway equipment
  • Method for monitoring communication fault of CAN bus node by vehicle-mounted gateway and gateway equipment

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Embodiment 1

[0045] Such as figure 2 Shown is a schematic flow diagram of a vehicle-mounted gateway to CAN bus node communication fault monitoring method provided by an embodiment of the present invention, in figure 2 The method shown includes the following steps:

[0046] S1: Select one of the messages sent by each ECU in each network segment as a key message, where the key message is a periodic message or a periodic event message, and the period of the selected message is less than the preset Set period value;

[0047] image 3 is a schematic diagram of two network segments provided by the embodiment of the present invention, but the method of this embodiment is not only applicable to image 3 The two network segments in , are also applicable to multiple network segments, image 3For each ECU in the example network, one message is selected as a key message among the messages sent by each ECU. The principle of selecting a key message is to select a periodic message or a periodic eve...

Embodiment 2

[0076] Such as Figure 5 Shown is a schematic structural diagram of a gateway device provided by an embodiment of the present invention, including:

[0077] The key message selection module 501 is used to select a message as a key message from the messages sent by each ECU in each network segment, wherein the key message is a periodic message or a periodic event message, and The selected message period is less than the preset period value. If there are multiple messages that meet the conditions, select the message corresponding to the minimum message period as the key message;

[0078] The monitoring module 502 is used to determine whether the node loss has occurred in the ECU according to whether the key message of each ECU can be received;

[0079] The failure determination module 503 is used to set the signal value in the communication failure message, and the target network segment node judges whether the source node is lost through the signal value in the communication f...

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Abstract

The invention discloses a method for monitoring communication faults of a CAN bus node by a vehicle-mounted gateway and gateway equipment, and belongs to the technical field of vehicle-mounted communication. The method is implemented by the following steps: a message is selected from messages sent by ECUs in each network segment as a key message, wherein the key message is a periodic message or a periodic event message, and the selected message period is smaller than a preset period value; according to whether the key messages of the ECUs can be received, whether node loss occurs in the ECUs is determined; and a signal value in a communication fault message is set, and whether a source node is lost or not is judged by a target network segment node according to the signal value in the communication fault message, wherein the signal value in the communication fault message is used for identifying whether a certain ECU has node loss or not. According to the invention, the receiving node of the target network segment can judge whether the message / signal of the source node is valid.

Description

technical field [0001] The invention belongs to the technical field of vehicle communication, and more specifically relates to a method for monitoring communication failures of CAN bus nodes by a vehicle gateway and gateway equipment. Background technique [0002] At present, with the extensive use of automotive electronic equipment, there are more and more Controller Area Network (CAN) bus controllers on vehicles, and the resulting increase in interactive information has made the vehicle network structure from a single The network segment gradually develops into a complex network segment; the gateway, as the bridge of the vehicle network, is the core of the vehicle network, and the signal interaction between the two network segments can only be realized through the gateway. In the current CAN bus gateway routing strategy, the target node of the network segment cannot judge the status of the source node. If the signal of the source network segment (the network segment where ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G05B23/02
CPCG05B23/0213G05B2219/24065
Inventor 范志容鞠甜甜饶超张仁泉肖珍
Owner DONGFENG MOTOR GRP
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