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Kopetz
Andreas Kopetz, Baden-Siegenfeld AT
| Patent application number | Description | Published |
|---|---|---|
| 20080288650 | Method for the Energy-Saving and Timely Transmission of Event Messages - A method and a system-on-a-chip for the guaranteed and energy-saving transmission of event messages is provided in a distributed computer system consisting of a plurality of node computers, which are interconnected by a time-controlled communications system. The node computers establish a common time base of known precision and periodically exchange messages at a prior defined points in time. A guaranteed event message is sent in a sporadic time-controlled message (SZN). The sporadic time-controlled message transports the guaranteed event message and is sent only if the content of this sporadic time-controlled message has been changed since the last time it was sent. The receiver stores the content of an incoming sporadic time-controlled message in a queue until the receiving process has read this content exactly once in a consuming manner. | 11-20-2008 |
Hermann Kopetz, Baden AT
| Patent application number | Description | Published |
|---|---|---|
| 20100180123 | PROCEDURE AND ARCHITECTURE FOR THE PROTECTION OF REAL TIME DATA - The object of the present invention is to safeguard the authenticity and integrity of real-time data in a distributed real-time computer system. The present invention considers other requirements of real-time data processing, such as the timeliness of real-time data transmission and limited resource availability. Frequent modification of an asymmetric key pair hinders intruders from cracking a key before its validity has expired. The present method can also be extended to safeguard the confidentiality of real-time data. It can be implemented efficiently on a multiprocessor system-on-chip (MPSoC). | 07-15-2010 |
| 20100281130 | COMMUNICATION METHOD AND APPARATUS FOR THE EFFICIENT AND RELIABLE TRANSMISSION OF TT ETHERNET MESSAGES - The goal of the present invention is to improve the useful data efficiency and reliability in the use of commercially available ETHERNET controllers, in a distributed real time computer system, by a number of node computers communicating via one or more communication channels by means of TT ETHERNET messages. To achieve this goal, a distinction is made between the node computer send time (KNSZPKT) and the network send time (NWSZPKT) of a message. The KNSZPKT must wait for the NWSZPKT, so that under all circumstances, the start of the message has arrived in the TT star coupler at the NWSZPKT, interpreted by the clock in the TT star coupler. The TT star coupler is modified, so that a message arriving from a node computer is delayed in an intelligent port of the TT star coupler until the NWSZPKT can send it precisely at the NWSZPKT into the TT network. | 11-04-2010 |
Hermann Kopetz, Baden Bei Wien AT
| Patent application number | Description | Published |
|---|---|---|
| 20090086763 | TIME-CONTROLLED SECURE COMMUNICATION - The invention relates to a method for transmitting messages via a time-controlled communication system (ZK) between a number of IP cores, with each IP core having an information-processing subsystem (IVS) and a network controller (NK), with each NK having at least two interfaces, an interface for the ZK and a second interface for the IVS, characterised in that a distinction is drawn between privileged and non-privileged messages of the ZK, and where the transmission parameters relating to the ZK of a port of the NK, such as the periodically recurring transmission time of a time-controlled message and the maximum transmission duration after each transmission time, can be set exclusively by a privileged message via the ZK or directly by a privileged entity (privileged IP core), and where each NK intends to send a message starts to transmit the message autonomously exactly at the time of the next transmission time, and ends the transmission process at the latest after the assigned maximum transmission duration has elapsed. The invention additionally relates to a system-on-chip (SoC) for carrying out a method such as this. | 04-02-2009 |