A management method and device for a vehicle-mounted CAN local network

Abstract

The present invention provides a management method and device for a vehicle-mounted CAN partial network, wherein the method includes: generating a first network management message; setting the active sleep indication bit in the first network management message and the Node sleep indication bit; broadcast and send the first network management message carrying the target address after setting the bit; receive the second network management message carrying the address of the node to sleep returned according to the first network management message; detect the second network management message Whether the parameter bits corresponding to the active sleep indicator bit and the node sleep indicator bit in the management message are all set; Enter sleep mode after a preset period of time. This solution effectively prevents false reporting of node loss failures due to failure to identify the cause of network node offline (passive offline due to failure or active offline due to energy saving), and ensures normal and orderly communication of the CAN local network.

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...

AI Technical Summary

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 problem in the prior art that the node is lost due to the inability to identify whether the network node is passively offline due to a fault or actively offline due to energy saving.

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