Tttech Computertechnik Ag

Other

Honeywell International Inc.

Fts Computertechnik Gmbh

Harald Angelow

Wilfried Steiner

Brendan Hall

Guenther Bauer

Kevin Raymond Driscoll

Stefan Poledna

Günther Bauer

Matthias Wachter

Martin Schwarz

Günter Bauer

The invention relates to a method for the redundant transmission of messages in a distributed real-time system, wherein the real-time system comprises two or more computing nodes (-) and one or more star couplers (-), wherein the computing nodes (-) are connected to the star couplers (-) by means of bidirectional communication lines () and the star couplers (-) are interconnected by bidirectional communication lines (), and wherein the star couplers (-) connected by the communication lines () form a network infrastructure (), wherein one or more star couplers (-) of the network infrastructure () perform one or more activity rasters (), wherein an activity raster () consists of alternating active phases () and rest phases (), and wherein any message sent in the network infrastructure is assigned to precisely one activity raster (). The invention also relates to a network infrastructure and also a real-time system comprising a network infrastructure of this type.

Method and network infrastructure for the redundant transmission of messages in a distributed real-time system

A method for start-up of a network, including a number of nodes, which are connected via channels. The nodes exchange information in the form of messages via the channels. The transition phase of a synchronizing node from its initial phase to a synchronized phase is separated in a first integration phase and a second subsequent cold-start phase. A synchronizing node in the integration phase listens to messages being sent from nodes in the synchronized phase and only reacts to an integration message (i-frame) if the integration message is a valid message. Furthermore, a synchronizing node, wherein integration of the synchronizing node to a set of already synchronized nodes was not successful after a specifiable period, changes into the cold-start phase, in which a cold-start procedure of the node is extracted, wherein in the cold-start phase the node does not react to integration messages of a node in the synchronized phase.

Safe start-up of a network

To relay messages in a time-controlled communication system with a star coupler arranged as a multirouter, messages arriving via ports are relayed according to a rule defined in the star coupler. Relaying paths are switched according to a rule defined in the star router which describes relaying paths for messages, namely in the synchronized operating state depending on the time according to the global time basis of the communication system. Two relaying paths can occur simultaneously in at least one time slot whereby they are in disjunction to one another. Each port belongs to only one relaying path respectively at any time. A check is conducted on the basis of a message's content as to whether the relaying of the message complies with an acceptance rule. Relaying of the message to those target ports which do not match the rule is cancelled or ended under the invalidation of the message.

Multirouter for time-controlled communication system

Method and systems of transmission schedule enforcement in a hub-based network is provided. Method includes receiving guardian messages from one or more of a plurality of nodes, implementing a voting function, voting the received guardian messages using the voting function, and when a clear winner of the received guardian messages is detected, enabling a port indicated by the clear winner to propagate. The guardian messages are received outside of TDMA communications. The guardian messages contain information pertaining to the next slot or slots to transmit.

Voting mechanism for transmission schedule enforcement

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Vienna, Austria

Harald Angelow