Patent ID: 9632970
Date: 2017-04-25
CPC Classifications: B60L,G06F,H04L,Y02D,Y02T,Y04S

Claim:
1. An apparatus for operating a data bus system of a motor vehicle, wherein the data bus system has a plurality of data bus segments that change from an awake state to an idle state and vice versa, the apparatus comprising: a device that determines a communication requirement of a first controller of a first data bus segment in the idle state; a wake-up device that wakes up the first data bus segment from the idle state to the awake state in response to a determination of a communication requirement of the first controller, and a device for switching data bus segments which are in the awake state back to the idle state, wherein the wake-up device also simultaneously wakes up all further data bus segments of the plurality of data bus segments in the idle state other than the first data bus segment in response to determination of a communication requirement of the first controller with a second controller outside the first data bus segment, so that all of the plurality of data bus segments of the data bus system are in the awake state, and wherein the device for switching to the idle state switches a data bus segment to the idle state only when a specific other data bus segment has already been moved to the idle state in advance.