TTTECH COMPUTERTECHNIK AKTIENGESELLSCHAFT Patent applications |
Patent application number | Title | Published |
20100036920 | METHOD AND DEVICE FOR THE CREATION OF A COMMUNICATION SYSTEM BASED ON CAN COMMUNICATION CONTROLLERS FEATURING AN INCREASED DATA THROUGHPUT - Disclosed is a method for transmitting CAN messages via a CAN bus in a communication system including several network nodes with at least one respective CAN controller. According to the method, the authorization of a network mode to send a CAN message is arbitrated, an arbitration decision being made in a higher protocol layer than the transmission of the CAN message, and the CAN message is already sent by the transmitting network node, the latter providing a dominant level in the ACK field of the message. A network node which receives the CAN message does not generate a dominant level in the ACK field and does not send a complete error frame. | 02-11-2010 |
20100020828 | MULTIROUTER FOR TIME-CONTROLLED COMMUNICATION SYSTEM - 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. | 01-28-2010 |
20090122812 | SAFE START-UP OF A NETWORK - 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. | 05-14-2009 |