Patent ID: 7890229

Claim:
A device for waking up at least one targeted user of a bus system without waking up all of the users of the bus system, comprising: a detection device for implementing a two-step wake-up procedure including: performing a first step of transmitting, from a transmitter, a message on the bus system for detecting at least one predefined signal feature of the message and determining, as a function of a data pattern encoded within the message, the at least one targeted user as an intended target; at only one of the users, receiving the message; at the only one of the users receiving the message, determining if a preselected number of occurrences of the at least one predefined signal feature of the message has been reached; after the only one of the users has determined that the preselected number of occurrences has been reached, retransmitting, from the transmitter, the message on the bus system; and determining one of a number of the users to be awakened and a group of users to be awakened based on the retransmitted message, each user being awakened only if the data pattern identifies at least one of the user and a group to which the user belongs; wherein a length of the message is at least two bits, and wherein the preselected number of occurrences of the at least one predefined signal feature is greater than one.