Management method and device for vehicle-mounted CAN partial networking

A technology of network management and local network, which is applied in the field of vehicle CAN local network management. It can solve problems such as falsely reporting node loss failures and failure to identify network nodes, so as to ensure normal order, prevent false reporting of node loss failures, and ensure communication. Effect

Active Publication Date: 2014-11-05
BAIC MOTOR CORP LTD
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  • Description
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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide a management method and device for a vehicle-mounted CAN local network, so as to solve the probl

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  • Management method and device for vehicle-mounted CAN partial networking
  • Management method and device for vehicle-mounted CAN partial networking
  • Management method and device for vehicle-mounted CAN partial networking

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Embodiment Construction

[0078] In order to make the technical problems, technical solutions and advantages to be solved by the present invention clearer, the following will describe in detail with reference to the drawings and specific embodiments.

[0079] The present invention aims at the problem in the existing technology that it is impossible to identify whether the network node is passively offline due to a fault or is actively offline due to energy saving and falsely reports a node loss fault, and provides a management method for a vehicle-mounted CAN local network, which is applied to a vehicle-mounted CAN local network. nodes, such as figure 1 shown, including:

[0080] Step 11: generating a first network management message;

[0081] Step 12: Set the active sleep indicator bit in the first network management message and the node sleep indicator bit corresponding to the node to sleep;

[0082] Step 13: Broadcasting and sending the first network management message carrying the target address ...

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Abstract

The invention provides a management method and device for vehicle-mounted CAN partial networking. The method comprises the steps that a first network management message is generated; an active sleep indicating bit in the first network management message and a node sleep indicating bit corresponding to a sleepy node are set; the first network management message which carries a target address and is processed by setting is sent in a broadcasting mode; a second network management message which carries a sleepy node address and is returned according to the first network management message is received; whether parameter bits, corresponding to the active sleep indicating bit and the node sleep indicating bit, in the second network management message are set or not is detected; if it is detected that the parameter bits are set, the first network management message is not sent any more in a broadcasting mode, and the sleepy node is made to enter the sleep mode after a preset time period. By means of the scheme, the problem that as the network node offline reason (whether the network nodes are passively offline due to faults or are actively offline for energy conservation) can not be recognized, misinformation of a node loss fault is caused is effectively prevented, and normal and orderly communication of the CAN partial networking is ensured.

Description

technical field [0001] The invention relates to the technical field of automotive electronic control, in particular to a management method and device for a vehicle-mounted CAN local network. Background technique [0002] As governments around the world continue to require reductions in vehicle carbon dioxide emissions, OEMs are increasingly concerned about how to create more environmentally friendly vehicles. When it comes to environmental protection of vehicles, many people first think of electric vehicles, but in fact, traditional vehicles also have the possibility of improving energy efficiency. The goal of the global government is to reduce the total carbon dioxide emissions. However, most of the power supply in many developing countries comes from thermal power plants. Therefore, the electric vehicles used in these countries actually only transfer carbon dioxide emissions from cars to thermal power plants. reduce. In view of this, OEMs began to implement CAN Partial N...

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Application Information

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IPC IPC(8): H04L12/24
Inventor 郭俊飞姬广斌张永刚
Owner BAIC MOTOR CORP LTD
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