Robert Boschgmbh

Bayerische Motoren Werke Aktiengesellschaft

Daimler Chrysler Ag

Gm Global Technolgoy Operations, Inc.

Motorola Corporation

Koninklijke Philips Corporation N.v.

Freescale Semiconductor,inc.

Nxp B.v.

Bernd Müller

Florian Hartwich

Robert Hugel

Thomas Fuehrer

Andreas Weigl

Mathias Rausch

Anton Schedl

Bernd Hedenetz

Thomas M Forest

Peter Fuhrmann

Christian Ebner

Florian Bogenberger

Manfred Bruno Zinke

Martin Peller

Bernd Elend

Christopher Temple

Josef Berwanger

Harald Eisele

Arnold W Millsap

Ralf Belschner

Jörn Ungermann

Harald Weiler

Peter Lohrmann

Thomas Führer

Patrick Willem Heuts

Thomas Wuerz

Matthias Kühlewein

Klaus Ries-Mueller

Werner Hess

Werner Harter

Peter Dominke

Chi-Thuan Cao

Peter Ahner

Peter Blessing

Ngoc-Thach Nguyen

Helmut Janetzke

Herbert Lohner

Thorsten Allgeier

Wolfgang Pfeiffer

Bo Yuan

Elmar Dilger

Thomas Sauer

Thomas Furhrer

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

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

A method and a communication system for exchanging data between at least two users interconnected over a bus system are described. The data is contained in messages which are transmitted by the users over the bus system. To improve data exchange among users so that in the normal case, there is a high probability that it will be possible to transmit messages with a low latency, while on the other hand, in the worst case, a finite maximum latency can be guaranteed, the data be transmitted in an event-oriented method over the bus system as long as a preselectable latency period elapsing between a transmission request by a user and the actual transmission operation of the user can be guaranteed for each message to be transmitted as a function of the utilization of capacity of the bus system, and otherwise the data is transmitted over the bus system by a deterministic method.

Method and communication system for data exchange among multiple users interconnected over a bus system

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 method and a system for synchronizing at least two users are described, each user to be synchronized containing its own timer, and the users being connected by at least one communications link, at least one event being transmitted for synchronization on the communications link, a first user determining a first view of the global time as a function of the event, and the at least one second user determining a second view of the global time as a function of the event, the minimum of the first and second views of the global time being transmitted through the corresponding users on the communications link, and each user to be synchronized determining an overall global time from the minimum of a first global time view and a second global time view, and the timer contained therein being synchronized with the overall global time.

Method and system for the distributed synchronization of users of a communications link

A method for the exchange of data in messages between at least two users which are connected by a bus system, the messages containing the data being transmitted by the users via the bus system, and each user containing a predefinable and/or ascertainable timing mark; a first user, in a function as timer, controls 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, and if the timing mark of the second user is reached without a reference message of the first user reaching the second user, the at least second user takes over the function of timer by transmitting its own reference message with its own time information via the bus system.

A method and device for the exchange of data in messages between at least two users which are connected by a bus system and have separate time bases, the messages containing the data being transmitted by the users via the bus system; and a first user, in a function as timer, controls the messages as a function of time in such a way that it repeatedly transmits a reference message, which contains time information regarding the time base of the first user, via the bus at a specifiable time interval; the at least second user forms its own time information, using its time base, as a function of the time information of the first user; a correction value is ascertained from the two pieces of time information; and the second user adapts its time information and/or its time base as a function of the correction value.

Data exchange between users connected by a bus system and having separate time bases

A steer-by-wire steering system comprised of an electronically regulated steering positioner mounted to the steering gear of the front axle or to both front wheels of a vehicle together with an electronic steering regulator and a feedback actuator. A sensor senses the driver's selected direction from the steering wheel. Road feedback can be relayed to the driver through a feedback actuator via the steering wheel. The loss of road feel caused by the absence of the steering column, which normally strongly influences the driver's directional wish, is recreated by the feedback actuator.

Steer-by-wire steering system for motorized vehicles

Growing community of inventors

Leonberg, Germany

Bernd Müller