Robert Boschgmbh

Daimler Chrysler Ag

Gm Global Technolgoy Operations, Inc.

Bayerische Motoren Werke Aktiengesellschaft

Koninklijke Philips Corporation N.v.

Motorola Corporation

Freescale Semiconductor,inc.

Nxp B.v.

Peter Lohrmann

Florian Hartwich

Robert Hugel

Josef Berwanger

Anton Schedl

Ralf Belschner

Thomas M Forest

Peter Fuhrmann

Christian Ebner

Florian Bogenberger

Manfred Bruno Zinke

Christopher Temple

Bernd Elend

Martin Peller

Mathias Rausch

Bernd Müller

Arnold W Millsap

Harald Eisele

Jörn Ungermann

Bernd Hedenetz

Harald Weiler

Thomas Wuerz

Thomas Führer

Patrick Willem Heuts

Matthias Kühlewein

Bernd Mueller

Thomas Fuehrer

Carsten Gebauer

Juergen Minuth

Thilo Kuehner

Matthias Kuehlewein

Volker Seefried

Helmar Kuder

Bernd Saeufferer

Martin Huber

Werner Preuschoff

The invention relates to a cyclical time-based communication system, for the transmission of useful data (DATA) between users of the system, which comprises a databus and users connected thereto. The data transmission occurs within cyclical repeating timeframes, each with at least two timeslots. Each timeslot is provided for the transmission of a message (Ni). A message (Ni) comprises at least part of the useful data (DATA) and each message (Ni) is provided with a code (ID). The bandwidth available for data transmission may be better utilized, if the code (ID) is placed within the message (Ni) as a part thereof, each message (Ni) is additionally provided with time information concerning the timeslot which may be extracted from the code and at least one of the timeslots within the timeframes may be used for transmission of various messages in various cycles. In a preferred embodiment the information relating to the current cycle comprises an ordinal number for the cycle. In the simplest case the number has two values 0 and 1. Even and odd cycles can thus be differentiated. The ordinal number may be increased to differentiate more cycles from each other. The transmission method is preferably based on the FlexRay protocol.

Cyclical time-based communication system, user in such a system and transmission method

The invention refers to a method for monitoring a communication media access schedule of a communication controller () of a communication system () by means of a bus guardian (). The communication system () comprises a communication media () and nodes () connected to the communication media (). Each node () comprises a communication controller () and a bus guardian () assigned to the communication controller (). Messages are transmitted among the nodes () across the communication media () based on a cyclic time triggered communication media access scheme. In order to provide a mechanism which allows the bus guardian () to monitor the communication media access scheme of the communication controller () even during startup of the communication it is suggested, that the bus guardian () has a priori knowledge about possible deviations from the communication media access schedule during startup of the communication and that the bus guardian () during startup makes use of the a priori knowledge to distinguish between an allowed deviation and a forbidden deviation caused by a failure of the communication controller ().

Method for monitoring a communication media access schedule of a communication controller of a communication system

A method and a bit stream decoding unit for bit stream decoding has a bit stream comprising a number of consecutive samples. In order to provide for rapid and, in particular, reliable decoding of the bit stream, a detection window comprising a number of samples is defined and the detection window is positioned at certain positions on the bit stream in order to comprise certain samples with respective sample values. A majority voting is applied to the sample values in the detection window and, in dependence on the result of the majority voting, the bit stream is decoded and respective bit values are generated.

Method and bit stream decoding unit using majority voting

An electronic vehicle controller has a processor unit and a communication output stage for coupling the controller to a databus. A data protocol device, which is connected between the processor unit and the communication output stage, variably defines the data protocol to be used for a particular data transfer, as a function of protocol control information which is supplied to its input side. The data protocol device may be in the form of hardware or software, and allows flexible data protocol selection even at the end of the controller development process.

Electronic vehicle controller with a databus capability

Growing community of inventors

Eislingen, Germany

Peter Lohrmann