Mode switching method and CAN (Controller Area Network)

Abstract

The invention discloses a mode switching method and a CAN (Controller Area Network), which relate to an automobile network management technology and are used for lowering the network load rate and preventing a part of slave nodes from sleeping forcibly due to master and slave node setting. The mode switching method is applied to each node in an automobile CAN; the automobile CAN comprises at least two nodes; the at least two nodes support a sleeping function; and a first node is any node in the CAN. The method comprises the following steps of: transmitting a message including a sleeping instruction by using the first node; receiving response messages of other nodes except the first node; and when all the response messages are messages including sleeping instructions, transmitting a message with a sleeping response by using the first node to instruct all nodes in the CAN to be switched to a sleeping waiting mode. According to the mode switching method and the CAN, the network load rate is lowered, and the problem that a part of slave nodes are forced to sleep due to master and slave node setting is solved.

Description

technical field [0001] The invention relates to automobile network management, in particular to a mode switching method and a CAN network. Background technique [0002] The rapid development of the information society makes automobiles electronic and networked. The sign that the automobile enters the era of electronic control is the application of ECU (Electronic Control Unit, electronic control unit). With the increasing number of ECUs in automobiles, each ECU needs to exchange information with each other, so the Internet used in automobile control systems was born. Among them, the CAN network has the characteristics of strong real-time performance, high reliability, simple structure, good interoperability and low price, so the CAN network is widely used in the automotive field. [0003] Static power consumption is an important technical indicator of the vehicle. In order to reduce the static power consumption of the vehicle, it is necessary to make the electronic control...

AI Technical Summary

Problems solved by technology

The existing OSEK indirect network management strategy is to coordinate the network nodes to enter the sleep state at the same time by sending sleep commands from the master node to the slave nodes. However, when the master node sends the sleep command, some slave nodes still need network communication, which leads to The problem that some slave nodes are forced to sleep, which cannot meet the functional requirements of slave nodes

[0005] Therefore, it is necessary to provide a network management strategy to reduce the network load rate and avoid the problem that some slave nodes are forced to sleep due to the master-slave node setting

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