Robert Boschgmbh

Bayerische Motoren Werke Aktiengesellschaft

Daimler Chrysler Ag

Gm Global Technolgoy Operations, Inc.

Motorola Corporation

Freescale Semiconductor,inc.

Nxp B.v.

Koninklijke Philips Corporation N.V.

Decomsys—dependable Computer Systems, Hardware Und Software Entwicklung Gmbh

Anton Schedl

Josef Berwanger

Florian Hartwich

Robert Hugel

Ralf Belschner

Bernd Hedenetz

Thomas M Forest

Peter Fuhrmann

Martin Peller

Christopher Temple

Mathias Rausch

Bernd Müller

Arnold W Millsap

Peter Lohrmann

Thomas Führer

Bernd Mueller

Josef Krammer

Thomas Fuehrer

Christian Ebner

Florian Bogenberger

Carsten Gebauer

Manfred Bruno Zinke

Bernd Elend

Harald Eisele

Jörn Ungermann

Harald Weiler

Patrick Willem Heuts

Thomas Wuerz

Matthias Kühlewein

Matthias Kuehlewein

Joachim Froeschl

Gregor Pokorny

Peter Lohrman

Bettina Holzmann

Grzegorz Olender

Lucien Stemmelen

Ing Ralf Belschner

A cyclical time-based communication system, for the transmission of data (DATA) between users, comprising 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 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), 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 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. In the simplest case the number has two values 0 and 1.

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

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.

In a method for carrying out cyclic and conflict-free data communication for the subscribers of a data bus, which transmits data in non-overlapping time periods within a subscriber cycle interval and processes jobs, and whose fixed transmission time slots in a planning phase are allocated within the subscriber cycle interval, the task processing for a subscriber is carried out exclusively within an application time interval within the subscriber cycle interval, and in the planning phase the transmission time slots for each subscriber, within a transmission time interval which is disjunct with respect to the application time interval, are selected within the subscriber cycle interval, and the selected transmission time slots are communicated to the subscribers in a subsequent initializing phase.

Method for data communication

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

The invention concerns a network comprising an interconnecting network and several network nodes that are coupled to said interconnecting network and are designed to adapt their local communication time schedule to the communication time schedule of at least one other network mode, prior to being integrated as active network nodes. A network node to be integrated checks the activity of other network nodes and if no activity is identified, sends out positional messages for other network nodes, said message being fixed by predetermination in its communication time schedule. If a network node cannot be integrated as a reference node, it can only be integrated as an active node if it adapts its local communication time schedule to that of the reference node after receiving positional messages and if a check as to whether its own communication time schedule agrees with the communication time schedules of at least some of the active network nodes proves positive.

Network comprising an interconnecting network and several network nodes that are coupled to said interconnecting network

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

The present invention provides an improved clock synchronization algorithm for a distributed system intended for real time applications by performing at the same time an off-set correction and a clock read correction at each node of the distributed system. Expensive oscillators can be avoided and synchronization can be established faster and with higher precision.

Clock synchronization in a distributed system

A control unit has a main microprocessor and processor interface to a bus transceiving unit, which has at least one transmit memory, one receive memory and one bus controller. Devices are provided by which the data content of the transmit memory and/or of the receive memory is reset to a defined status after each output and/or reading-in of the data stored in either memory, and before the main microprocessor outputs and/or reads in new data.

Control unit having a main microprocessor and having a processor interface to a bus transceiver unit

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Munich, Germany

Anton Schedl