Nxp B.v.

Koninklijke Philips Corporation N.v.

Gm Global Technolgoy Operations, Inc.

Robert Boschgmbh

Bayerische Motoren Werke Aktiengesellschaft

Daimler Chrysler Ag

Motorola Corporation

Freescale Semiconductor,inc.

Manfred Bruno Zinke

Peter Fuhrmann

Jörn Ungermann

Bernd Elend

Florian Hartwich

Thomas M Forest

Robert Hugel

Wolfgang Otto Budde

Christian Ebner

Markus Baumeister

Florian Bogenberger

Christopher Temple

Martin Peller

Josef Berwanger

Mathias Rausch

Bernd Müller

Anton Schedl

Arnold W Millsap

Harald Eisele

Ralf Belschner

Bernd Hedenetz

Harald Weiler

Peter Lohrmann

Thomas Wuerz

Thomas Führer

Patrick Willem Heuts

Matthias Kühlewein

Klaus Peter May

Patrick Willem Hubert Heuts

Bjoern Weissler

Joern Ungermann

A data detection device is used in combination with a magnetic resonance imaging (MRI) apparatus. A magnetic field detection unit () serves to detect a temporally varying magnetic field generated by the MRI apparatus, and a timestamping unit () generates magnetic field detection timestamps in dependence of the detected temporally varying magnetic field. This allows determining a temporal relation to acquired MRI data.

Data detection timestamp device for use in combination with an MRI apparatus and a nuclear imaging (PET or SPECT) device

The present invention relates to a clock supervision unit () and an electronic system clocked by at least one clock (c*) and using the clock supervision unit (). The clock supervision unit () analyzes the at least one clock (c*) based on a monitor clock (m*) provided together with the at least one clock (c*) or separately to the clock supervision unit (). The clock supervision unit () at least comprises an activity unit (), a deviation unit () and an auxiliary clock generator (). The auxiliary clock generator () outputs an auxiliary clock (a*). The activity unit () detects the presence of the monitor clock (m*) based on the auxiliary clock (a*) and the presence of the auxiliary clock (a*) based on the monitor clock (m*). The deviation unit () detects clock faults in the monitor clock (m*) based on the auxiliary clock (a*). With the clock supervision unit () according to the present invention, the at least one clock (c*) can be supervised in more detail and it is possible to react on different clock faults in the at least one clock c* with different error handling procedures, e.g. by initiating a shutdown of the devices controlled by the electronic system.

Clock supervision unit

A system and method for providing fault detection capability is provided which comprises a first node (). The first node () comprises a first processing subsystem () generating data () to be transmitted. The first node () has a fault supervisor unit () adapted to gather and process fault indications arising in the first node (). The first processing subsystem () and the fault supervisor unit are both integrated in the first node (). The first node () is structured such that, when no fault indications are detected by the fault supervisor unit (), the fault supervisor unit () provides a first key () as a validity key, and, when at least one fault indication is detected by the fault supervisor unit (), the fault supervisor unit () provides a second key () as the validity key, and the data () to be transmitted are encrypted by overlaying the respective validity key () on the data.

System and method providing fault detection capability

A star network () having a star coupler () and at least a first and second network branch (), wherein each network branch () comprises at least one network node () and a bus driver () connected between the star coupler () and the at least one network node (). A first bus driver () of the first network branch () is adapted to detect a symbol pattern comprising at least two predetermined equal control symbols, which are transmitted from the first network node () to the second network node (), wherein a control symbol is part of a control pattern. The control pattern is used to force at least the second network node () to switch into a predetermined state. The first bus driver () is disabling the first network branch () from the star network () based on whether the transmitted symbol pattern is detected. By using the protection mechanism a reliable detection of babbling idiots is provided. Moreover, in case of detecting such babbling idiots the remaining network nodes are separated and the network can operate without being influenced by the faulty network node.

Star network and method for preventing a repeated transmission of a control symbol in such a star network

A network node () with a communication unit (), which is provided for the implementation of a communication protocol for the purpose of communication with other network nodes via a communication medium (), and with a bus monitor (), which, mutually independently, each implement an access time schedule contained in a configuration data record, and which each make available, in accordance with the access time schedule, a release signal for a bus driver () provided in the network node (), which evaluates these two signals and, in the event that the two release signals do not coincide, blocks the access of the network node () to the communication medium ().

Error detection and suppression in a TDMA-based network node

The invention describes a method for the monitoring and management of data traffic in a communication system with several communication nodes which communicate via interfaces monitored by a bus monitor, comprising the following steps: a) provision of a predefined communication time schedule for all communication nodes, b) initialization of the bus monitor, c) synchronization of the communication time schedule of the bus monitor with the predefined communication time schedule executed by the communication nodes in a distributed arrangement, the synchronization taking place on the basis of activities observed at the interfaces, d) monitoring of the activities of the communication nodes by the bus monitor, e) comparison of the activities with the predefined communication time schedule, and f) deactivation of the interface for any communication node for which an activity not compatible with the predefined communication time schedule has been detected. A circuit arrangement and its use are also described.

Method and circuit arrangement for the monitoring and management of data traffic in a communication system with several communication nodes

Receiver for receiving a data stream via a data bus, which receiver samples the bits of the data stream in an over-sampling process, in which n bit strobe offsets are used and n data sets with i bits are sampled,&#x2014;applies a decision criterion for identifying those data sets with correct bit values. This decision uses checksum CRC,&#x2014;selects one of the identified data sets with correct bit values and&#x2014;uses the bit strobe offset, which was used for receiving the selected data streams, for receiving the data stream. In this way the multiphase clock with optimal phase shifts is selected.

Receiver with adaptive strobe offset adjustment

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 relates to a communications network with at least two network nodes, between which data may be transmitted via a transmission medium,

Communications network and method of controlling the communication network

The invention relates to a communication network with at least two network nodes, with transmission channels for transmitting data packets between the network nodes, and with at least one active coupler. The invention provides for coupler information to be attached to the data packets as they pass through the active coupler, and data-packet running-time information to be determined from the coupler information in a network node that receives a data packet.

Communication network and method of controlling the communication 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

In order to carry out in a communication system () a temporal synchronization of clocks in a particularly rapid and efficient manner, a method is proposed which has the following steps: acquiring state values which are dependent on a time base (); filing each acquired state value at a position in a first list L comprising (k+1) positions, if the acquired state value is smaller than or equal to the (k+1) smallest element of the list L, where k is a predefinable error tolerance; filing the acquired state value at a position in a second list H comprising (k+1) positions, if the acquired state value is greater than or equal to the (k+1) greatest element of the list H; forming a mean value from the (k+1) smallest element of the list L and the (k+1) greatest element of the list H, if the number of acquired state values is greater than or equal to (2+2); determining a correction value as a function of the mean value; and correcting a current state value of the clocks that are to be synchronized.

Method for temporal synchronization of clocks

The invention relates to a network comprising a plurality of network nodes. At least part of the network nodes are directly intercoupled via at least one star node. The star node contains a plurality of star interfaces which are assigned to at least one network node. A star interface is provided for transferring a message from the assigned network node to the other star interfaces or from another star interface to at least one of the assigned network nodes always in dependence on a pilot signal.

Network comprising a plurality of network nodes and at least one star node

The invention relates to a network comprising a plurality of intercoupled network nodes. Controlled by a bus guardian the network nodes transmit messages during a respectively assigned time slot and receive messages from other network nodes outside this time slot. Each network node comprises a test signal generator which delivers a test signal outside the respectively assigned time slot, and includes a test signal detector which detects outside the respective time slot, after receiving a test signal from at least another network node, that there is a defective circuit portion in the assigned network node and/or in at least another network node.

Growing community of inventors

Aachen, Germany

Manfred Bruno Zinke