Robert Boschgmbh

Gm Global Technolgoy Operations, Inc.

Bayerische Motoren Werke Aktiengesellschaft

Daimler Chrysler Ag

Koninklijke Philips Corporation N.V.

Motorola Corporation

Freescale Semiconductor,inc.

Nxp B.v.

Robert Hugel

Florian Hartwich

Thomas Fuehrer

Bernd Mueller

Andreas Weigl

Bernd Müller

Josef Berwanger

Anton Schedl

Ralf Belschner

Peter Lohrmann

Erich Zabler

Thomas M Forest

Peter Fuhrmann

Christian Ebner

Peter Baeuerle

Florian Bogenberger

Piotr Szablewski

Carsten Gebauer

Manfred Bruno Zinke

Bernd Elend

Martin Peller

Christopher Temple

Mathias Rausch

Thorsten Enders

Harald Eisele

Arnold W Millsap

Bernd Hedenetz

Jörn Ungermann

Harald Weiler

Patrick Willem Heuts

Thomas Führer

Thomas Wuerz

Matthias Kühlewein

Matthias Kuehlewein

Ferdinand Grob

Bernd Weyerstall

Josef Wahl

Rolf Kohler

Juergen Schirmer

Clemens Schroff

Peter-Jurgen Schmidt

Frieder Heintz

Ulrich Koelle

Karl-Ernst Weiss

Bernardo Erices

Bernd Diebold

Helmut Randoll

Frank Stiegler

Manfred Rothley

Walter Jansche

Dieter Kraft

Matthias Koerwer

Bernd Herrmann

Wolfgang Bremer

Gunther Baumann

Claus-Dietrich Pilch

Jorg Birmelin

Peter Lohrman

Lothar Bollweber

Viktor Kopernick

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

A method and a device for exchanging data in messages between at least two stations connected by a bus system. The messages contain the data being transmitted by the stations over the bus system. Each message contains an identifier characterizing the data contained therein. Each station decides on the basis of the identifier whether to receive the message. The messages are controlled in time by a first station. The first station repeatedly transmits a reference message over the bus in at least one specifiable time interval. The time interval is subdivided into time windows of a specifiable length, the messages being transmitted in the time windows.

Method and device for exchanging data between at least two stations connected to a bus system

A communications system for a motor vehicle, including a plurality of electrical components, a data bus structure to which the components are connected in order to transmit information among the components, and a power line structure to which the components are connected in order to be supplied with power. The information is transmitted in successive cycles over the data bus structure, each cycle including at least one time window for transmitting information at specific points in time and at least one event window for transmitting information in response to specific events. The communications system includes an arrangement for redundantly transmitting information which merely transmits the information transmitted in the at least one time window over the data bus structure at least partially over the power line structure as well.

Method and communications system for transmitting information in a motor vehicle

A method, a device, and a bus system for synchronizing at least two TTCAN buses having at least one bus user, there being cycle times of the basic cycles in the TTCAN buses, a global time being determined in each TTCAN bus and the deviations of the global times of the TTCAN buses which are linked together by at least one user being determined from the global times, and the deviations of the individual global times being transmitted to at least one bus user, the cycle times of the TTCAN buses, which are connected by at least one user, being mutually adjusted as a function of the deviations in the global times in such a way that the buses are synchronized with respect to the cycle times.

Method and device for synchronizing cycle time of a plurality of TTCAN buses based on determined global time deviations and a corresponding bus system

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.

A method for exchanging data in messages between at least two users connected by a bus system, where each of the at least two users includes a predefinable and/or ascertainable timing mark, includes causing the at least two users to transmit, via the bus system, messages including the data. The method also includes causing a first user, in a function as timer, to control the messages as a function of time in such a way that it repeatedly transmits a reference message, which contains time information of the first user, via the bus at a specifiable time interval. Further, if the timing mark of the second user is reached without a reference message of the first user reaching the second user, the second user is caused to take over the function of timer by transmitting its own reference message with its own time information via the bus system.

Method and device for the exchange of data between at least two users connected to a bus system

A method for exchanging data in messages between at least two stations connected via a bus system. The messages contain the data being transmitted by the stations over the bus system, and the messages are controlled over time by a first station in such a manner that the first station repeatedly transmits a reference message containing time information of the first station over the bus system at least one specifiable time interval. The time interval is subdivided as a basic cycle into time windows of specifiable length, and the messages are transmitted in the time windows. When data is exchanged, a pause period of variable duration is provided at the end of at least one basic cycle, by which a time change of the beginning of the basic cycle is corrected by adaptation of the duration of the pause period.

Method, device and system for exchanging data via a bus system

A bus system includes at least two data buses, the first data bus having a first number of users and the second data bus having a second number of users. At least two TTCAN buses, which are interlinked by users connected simultaneously to both TTCAN buses, are used as the data buses. Fewer users than the sum of the number of users of the first TTCAN bus and the number of users of the second TTCAN bus are connected to the two TTCAN buses at the same time. A generating arrangement is included to generate a scalable fault tolerance in the bus system as a function of the number of users connected to the at least two TTCAN buses at the same time.

Bus system consisting of at least two data buses

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, a device, and a bus system for synchronizing at least two buses having at least one bus user, a global time being determined in each bus, and the deviations in the global times of the buses being determined from the global times, the buses being connected via at least one user and the deviations in the individual global times being transmitted to at least one bus user, and the global times of the buses connected via at least one user being adjusted to one another as a function of the deviations in the global times, so that the buses are synchronized with respect to the global times. The buses may include TTCAN buses.

Method and device for synchronizing the global time of a plurality of buses and a corresponding bus system

A method and a supply line structure for transmitting information between electrical components in a motor vehicle is described. The information is transmitted over a data bus. At least some of the components are powered via a supply line structure. To make the transmission of information between the components fail-safe, the information is also transmitted over the supply line structure in addition to over the data bus at least after a failure of the data bus.

Method and supply line structure for transmitting data between electrical automotive components

Method and device for exchanging data between at least two users that are connected to a bus 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

Method and device for synchronizing the cycle time of a plurality of TTCAN buses based on determined global time deviations and corresponding bus system

Method of synchronizing at least one user of a bus system which is operated with a preselectable system clock period (NTU), a local clock period (LNTU) and a reference clock period (GNTU) being preselected for the at least one user, and the reference clock period (GNTU) being synchronized with the system clock period (NTU), a local clock period (SLNTU), synchronized with the system clock period (NTU), of the at least one user being generated by linking the local clock period (LNTU) to a scaling factor (P), the scaling factor (P) reflecting a ratio of the reference clock period (GNTU) to the local clock period (LNTU), the scaling factor (P) for synchronization of the local clock period (LNTU) being adapted to the system clock period (NTU) by addition or subtraction of an adjustment value (O).

Method and device for synchronizing at least one node of a bus system and a corresponding bus system

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Karlsruhe, Germany

Robert Hugel