Node state management method and node state management device

Abstract

The invention discloses a node state management method, the method comprises the following steps: a node in a first bus network segment enters into a ready-to-sleep state when satisfying a local sleepcondition; duration of entering into the ready-to-sleep state of the node in the first bus network segment is measured by statistics; when the node in the first bus network segment receives a networkmanagement message, the duration of entering into the ready-to-sleep state of the node in the first bus network segment is reset; when the duration of entering into the ready-to-sleep state of the node in the first bus network segment is up to a first time threshold value, the node in the first bus network segment enters into a pre-sleep state; and when the duration of entering into the pre-sleepstate of the node in the first bus network segment is up to a second time threshold value, the node in the first bus network segment enters into a sleep state. Based on the method disclosed by the invention, time for sleep of the whole vehicle can be shortened, power consumption of the whole vehicle can be reduced, and effective power supply time for a battery is prolonged. The invention also discloses a node state management device.

Description

technical field [0001] The invention belongs to the technical field of vehicle systems, and in particular relates to a node state management method and a node state management device. Background technique [0002] Based on various factors such as function and performance, the existing vehicle system is internally divided into multiple CAN (Controller Area Network, Controller Area Network) bus network segments, such as: power bus network segment, body bus network segment and information Each bus network segment is composed of a variable number of ECUs (Electronic Control Unit, electronic control unit), and each bus network segment is physically isolated from each other. When the vehicle does not need to work, all ECUs need to be powered off or enter low power consumption mode. At this time, the quiescent current of the vehicle is the lowest, which can meet the performance index of the battery without running out of voltage for a long time. [0003] Based on the above require...

AI Technical Summary

Problems solved by technology

[0005] It can be seen that based on the existing control method, the vehicle gateway controller uses the sleep state of the previous bus network segment as the sleep condition of the next bus network segment, resulting in asynchronous sleep between the various bus network segments, making the whole vehicle sleep It takes a long time, increases the power consumption of the whole vehicle, and shortens the effective power supply time of the battery

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