Auflistung nach Autor:in "Ernst, Rolf"
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- KonferenzbeitragDesigning an analyzable and resilient embedded operating system(INFORMATIK 2012, 2012) Axer, Philip; Ernst, RolfMulti-Processor Systems on Chip (MPSoCs) are gaining traction in the embedded systems market. Their use will allow consolidation of a variety of applications into a single computing platform. At the same time the probability of transient hardware malfunctions manifesting at the software level increases. These applications integrated into the MPSoC possess a range of different requirements in terms of timing, safety and resource demand. Hence, it is impossible to provide a one-size-fits-all solution that allows reliable execution in future MPSoC systems. In this paper, we present ASTEROID, a set of hardware and operating system mechanisms that aim to provide reliable execution in such a diverse environment.
- TextdokumentInstitut für Datentechnik und Kommunikationsnetze – Mitgestaltung der Informatik in Braunschweig(40 Jahre Informatik an der Technischen Universität Braunschweig 1972 - 2012, 2012) Ernst, Rolf; Michalik, Harald; Rüffer, PeterIm vorliegenden Artikel wird die im Jahr 1968 begonnene Entwicklung des Instituts für Datentechnik und Kommunikationsnetze dargestellt. Er zeigt, wie aus den Anfängen einer einzelnen Professur für Datenverarbeitung mit dem Ausbau der Informatik an der TU Braunschweig und einer Institutionsfusion eines der größten Universitätsinstitute auf dem Gebiet der Technischen Informatik mit heute 3 Professuren entstand, das vor allem in den Bereichen Eingebettete Echtzeit-Systeme und Optische Kommunikation erfolgreich tätig ist.
- KonferenzbeitragReal-time Management in Emergent Systems(INFORMATIK 2006 – Informatik für Menschen, Band 1, 2006) Stein, Steffen; Hamann, Arne; Ernst, RolfIntegrating new functionality into complex embedded hard real-time systems requires considerable engineering effort. Emerging formal analysis methodologies and tools from real-time research assist system engineers solving this integration problem. For future organic computer systems, however, it is desirable to integrate these approaches into running systems, enabling them to autonomously perform e.g. online acceptance tests and self-optimization in case of system or environmental changes. This results in high system robustness and extensibility without explicit engineering effort. In this paper, we present an approach adapting formal compositional analysis techniques to realize self-awareness and self-adaptation in embedded systems with respect to real-time properties such as latency constraints, buffer sizes, etc. We introduce a framework for distributed online performance analysis running on embedded real-time systems. Based on this framework we implement an acceptance test for the integration of new functionality into an existing embedded real-time system. Furthermore, we present an online optimization algorithm based on the same framework. In a case study, we demonstrate the applicability of the approach and show that online optimization can increase the acceptance rate with reasonable computational effort.