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Documents authored by Glesner, Sabine

Document
DOI: 10.4230/OASIcs.ASD.2019.1
Fault-Tolerance by Graceful Degradation for Car Platoons

Authors: M. Baha E. Zarrouki, Verena Klös, Markus Grabowski, and Sabine Glesner

Published in: OASIcs, Volume 68, Workshop on Autonomous Systems Design (ASD 2019)

Abstract
The key advantage of autonomous car platoons are their short inter-vehicle distances that increase traffic flow and reduce fuel consumption. However, this is challenging for operational and functional safety. If a failure occurs, the affected vehicles cannot suddenly stop driving but instead should continue their operation with reduced performance until a safe state can be reached or, in the case of temporal failures, full functionality can be guaranteed again. To achieve this degradation, platoon members have to be able to compensate sensor and communication failures and have to adjust their inter-vehicle distances to ensure safety. In this work, we describe a systematic design of degradation cascades for sensor and communication failures in autonomous car platoons using the example of an autonomous model car. We describe our systematic design method, the resulting degradation modes, and formulate contracts for each degradation level. We model and test our resulting degradation controller in Simulink/Stateflow.
Cite as

M. Baha E. Zarrouki, Verena Klös, Markus Grabowski, and Sabine Glesner. Fault-Tolerance by Graceful Degradation for Car Platoons. In Workshop on Autonomous Systems Design (ASD 2019). Open Access Series in Informatics (OASIcs), Volume 68, pp. 1:1-1:15, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2019)

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@InProceedings{zarrouki_et_al:OASIcs.ASD.2019.1,
  author =	{Zarrouki, M. Baha E. and Kl\"{o}s, Verena and Grabowski, Markus and Glesner, Sabine},
  title =	{{Fault-Tolerance by Graceful Degradation for Car Platoons}},
  booktitle =	{Workshop on Autonomous Systems Design (ASD 2019)},
  pages =	{1:1--1:15},
  series =	{Open Access Series in Informatics (OASIcs)},
  ISBN =	{978-3-95977-102-3},
  ISSN =	{2190-6807},
  year =	{2019},
  volume =	{68},
  editor =	{Saidi, Selma and Ernst, Rolf and Ziegenbein, Dirk},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.ASD.2019.1},
  URN =		{urn:nbn:de:0030-drops-103344},
  doi =		{10.4230/OASIcs.ASD.2019.1},
  annote =	{Keywords: fault-tolerance, degradation, car platoons, autonomous driving, contracts}
}
Document
DOI: 10.4230/LIPIcs.ECRTS.2018.21
Instruction Caches in Static WCET Analysis of Artificially Diversified Software

Authors: Joachim Fellmuth, Thomas Göthel, and Sabine Glesner

Published in: LIPIcs, Volume 106, 30th Euromicro Conference on Real-Time Systems (ECRTS 2018)

Abstract
Artificial Software Diversity is a well-established method to increase security of computer systems by thwarting code-reuse attacks, which is particularly beneficial in safety-critical real-time systems. However, static worst-case execution time (WCET) analysis on complex hardware involving caches only delivers sound results for single versions of the program, as it relies on absolute addresses for all instructions. To overcome this problem, we present an abstract interpretation based instruction cache analysis that provides a safe yet precise upper bound for the execution of all variants of a program. We achieve this by integrating uncertainties in the absolute and relative positioning of code fragments when updating the abstract cache state during the analysis. We demonstrate the effectiveness of our approach in an in-depth evaluation and provide an overview of the impact of different diversity techniques on the WCET estimations.
Cite as

Joachim Fellmuth, Thomas Göthel, and Sabine Glesner. Instruction Caches in Static WCET Analysis of Artificially Diversified Software. In 30th Euromicro Conference on Real-Time Systems (ECRTS 2018). Leibniz International Proceedings in Informatics (LIPIcs), Volume 106, pp. 21:1-21:23, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2018)

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@InProceedings{fellmuth_et_al:LIPIcs.ECRTS.2018.21,
  author =	{Fellmuth, Joachim and G\"{o}thel, Thomas and Glesner, Sabine},
  title =	{{Instruction Caches in Static WCET Analysis of Artificially Diversified Software}},
  booktitle =	{30th Euromicro Conference on Real-Time Systems (ECRTS 2018)},
  pages =	{21:1--21:23},
  series =	{Leibniz International Proceedings in Informatics (LIPIcs)},
  ISBN =	{978-3-95977-075-0},
  ISSN =	{1868-8969},
  year =	{2018},
  volume =	{106},
  editor =	{Altmeyer, Sebastian},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ECRTS.2018.21},
  URN =		{urn:nbn:de:0030-drops-89822},
  doi =		{10.4230/LIPIcs.ECRTS.2018.21},
  annote =	{Keywords: WCET, static analysis, abstract interpretation, artificial diversity, cache analysis}
}
Document
DOI: 10.4230/DagSemProc.05402.1
Dagstuhl-Manifest zur Strategischen Bedeutung des Software Engineering in Deutschland

Authors: Manfred Broy, Matthias Jarke, Manfred Nagl, Hans Dieter Rombach, Armin B. Cremers, Jürgen Ebert, Sabine Glesner, Martin Glinz, Michael Goedicke, Gerhard Goos, Volker Gruhn, Wilhelm Hasselbring, Stefan Jähnichen, Stefan Kowalewski, Bernd J. Krämer, Stefan Leue, Claus Lewerentz, Peter Liggesmeyer, Christoph Lüth, Barbara Paech, Helmut A. Partsch, Ilka Philippow, Lutz Prechelt, Andreas Rausch, Willem-Paul de Roever, Bernhard Rumpe, Gudula Rünger, Wilhelm Schäfer, Kurt Schneider, Andy Schürr, Walter F. Tichy, Bernhard Westfechtel, Wolf Zimmermann, and Albert Zündorf

Published in: Dagstuhl Seminar Proceedings, Volume 5402, Perspectives Workshop (2006)

Abstract
Im Rahmen des Dagstuhl Perspektiven Workshop 05402 "Challenges for Software Engineering Research" haben führende Software Engineering Professoren den derzeitigen Stand der Softwaretechnik in Deutschland charakterisiert und Handlungsempfehlungen für Wirtschaft, Forschung und Politik abgeleitet. Das Manifest fasst die diese Empfehlungen und die Bedeutung und Entwicklung des Fachgebiets prägnant zusammen.
Cite as

Manfred Broy, Matthias Jarke, Manfred Nagl, Hans Dieter Rombach, Armin B. Cremers, Jürgen Ebert, Sabine Glesner, Martin Glinz, Michael Goedicke, Gerhard Goos, Volker Gruhn, Wilhelm Hasselbring, Stefan Jähnichen, Stefan Kowalewski, Bernd J. Krämer, Stefan Leue, Claus Lewerentz, Peter Liggesmeyer, Christoph Lüth, Barbara Paech, Helmut A. Partsch, Ilka Philippow, Lutz Prechelt, Andreas Rausch, Willem-Paul de Roever, Bernhard Rumpe, Gudula Rünger, Wilhelm Schäfer, Kurt Schneider, Andy Schürr, Walter F. Tichy, Bernhard Westfechtel, Wolf Zimmermann, and Albert Zündorf. Dagstuhl-Manifest zur Strategischen Bedeutung des Software Engineering in Deutschland. In Perspectives Workshop. Dagstuhl Seminar Proceedings, Volume 5402, pp. 1-16, Schloss Dagstuhl – Leibniz-Zentrum für Informatik (2006)

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@InProceedings{broy_et_al:DagSemProc.05402.1,
  author =	{Broy, Manfred and Jarke, Matthias and Nagl, Manfred and Rombach, Hans Dieter and Cremers, Armin B. and Ebert, J\"{u}rgen and Glesner, Sabine and Glinz, Martin and Goedicke, Michael and Goos, Gerhard and Gruhn, Volker and Hasselbring, Wilhelm and J\"{a}hnichen, Stefan and Kowalewski, Stefan and Kr\"{a}mer, Bernd J. and Leue, Stefan and Lewerentz, Claus and Liggesmeyer, Peter and L\"{u}th, Christoph and Paech, Barbara and Partsch, Helmut A. and Philippow, Ilka and Prechelt, Lutz and Rausch, Andreas and de Roever, Willem-Paul and Rumpe, Bernhard and R\"{u}nger, Gudula and Sch\"{a}fer, Wilhelm and Schneider, Kurt and Sch\"{u}rr, Andy and Tichy, Walter F. and Westfechtel, Bernhard and Zimmermann, Wolf and Z\"{u}ndorf, Albert},
  title =	{{Dagstuhl-Manifest zur Strategischen Bedeutung des Software Engineering in Deutschland}},
  booktitle =	{Perspectives Workshop},
  pages =	{1--16},
  series =	{Dagstuhl Seminar Proceedings (DagSemProc)},
  ISSN =	{1862-4405},
  year =	{2006},
  volume =	{5402},
  editor =	{Manfred Broy and Manfred Nagl and Hans Dieter Rombach and Matthias Jarke},
  publisher =	{Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik},
  address =	{Dagstuhl, Germany},
  URL =		{https://drops.dagstuhl.de/entities/document/10.4230/DagSemProc.05402.1},
  URN =		{urn:nbn:de:0030-drops-5853},
  doi =		{10.4230/DagSemProc.05402.1},
  annote =	{Keywords: Software Engineering, Software Technik, Strategie}
}
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