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  <doc>
    <id>799</id>
    <completedYear/>
    <publishedYear>2014</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber>80</pageNumber>
    <edition/>
    <issue/>
    <volume/>
    <type>periodicalpart</type>
    <publisherName/>
    <publisherPlace>Regensburg</publisherPlace>
    <creatingCorporation>Ostbayerische Technische Hochschule Regensburg</creatingCorporation>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Forschungsbericht 2013</title>
    <identifier type="urn">urn:nbn:de:bvb:898-opus4-7990</identifier>
    <identifier type="doi">10.35096/othr/pub-799</identifier>
    <author>Josef Beimler</author>
    <author>Caroline Leißl</author>
    <author>Lena Ebner</author>
    <author>Michael Elsner</author>
    <author>Gerhard Mühlbauer</author>
    <author>Dieter Kohlert</author>
    <author>Martin J. W. Schubert</author>
    <author>Andreas P. Weiß</author>
    <author>Michael Sterner</author>
    <author>Thomas Raith</author>
    <author>Martin Afranseder</author>
    <author>Tobias Krapf</author>
    <author>Jürgen Mottok</author>
    <author>Christian Siemers</author>
    <author>Benjamin Großmann</author>
    <author>Johannes Höcherl</author>
    <author>Thomas Schlegl</author>
    <author>Ralph Schneider</author>
    <author>Johannes Milaev</author>
    <author>Christina Rampelt</author>
    <author>Christian Roduner</author>
    <author>Christoph Glowa</author>
    <author>Christoph Bachl</author>
    <author>Claus Schliekmann</author>
    <author>Alfons Gnan</author>
    <author>Martin Grill</author>
    <author>Karl Ruhland</author>
    <author>Thomas Piehler</author>
    <author>Daniel Friers</author>
    <author>Harald Wels</author>
    <author>Kenny Pflug</author>
    <author>Markus Kucera</author>
    <author>Thomas Waas</author>
    <author>Felix Schlachetzki</author>
    <author>Sandra Boy</author>
    <author>Josef Pemmerl</author>
    <author>Alexander Leis</author>
    <author>Andreas F.X. Welsch</author>
    <author>Franz Graf</author>
    <author>Gerhard Zenger</author>
    <author>Klaus Volbert</author>
    <author>Thomas Waas</author>
    <author>Stefanie Scherzinger</author>
    <author>Meike Klettke</author>
    <author>Uta Störl</author>
    <author>C. Heyl</author>
    <author>A. Boldenko</author>
    <author>Gareth J. Monkman</author>
    <author>Richard Kujat</author>
    <author>Ulrich Briem</author>
    <author>Stefan Hierl</author>
    <author>Sebastian Talbot</author>
    <author>Anton Schmailzl</author>
    <author>Robert Damian Ławrowski</author>
    <author>Christian Prommesberger</author>
    <author>Christoph Langer</author>
    <author>Florian Dams</author>
    <author>Rupert Schreiner</author>
    <author>Piergiorgio Valentino</author>
    <author>Marco Romano</author>
    <author>Ingo Ehrlich</author>
    <author>Franco Furgiuele</author>
    <author>Norbert Gebbeken</author>
    <author>Michael Eisenried</author>
    <author>Bastian Jungbauer</author>
    <author>Albert Hutterer</author>
    <author>Michael Bauhuber</author>
    <author>Andreas Mikrievskij</author>
    <author>Monika Argauer</author>
    <author>Helmut Hummel</author>
    <author>Alfred Lechner</author>
    <author>Thomas Liebetruth</author>
    <author>Michael Schumm</author>
    <author>Saskia Joseph</author>
    <author>Michael Reschke</author>
    <author>Alexander Soska</author>
    <author>Irmgard Schroll-Decker</author>
    <author>Michael Putzer</author>
    <author>John Rasmussen</author>
    <author>Sebastian Dendorfer</author>
    <author>Tim Weber</author>
    <author>Amir Andreas Al-Munajjed</author>
    <author>Gijsbertus Jacob Verkerke</author>
    <author>Tobias Renkawitz</author>
    <author>Sonja Haug</author>
    <author>Clarissa Rudolph</author>
    <author>Annika Zeitler</author>
    <author>Simon Schaubeck</author>
    <author>Oliver Steffens</author>
    <author>Christian Rechenauer</author>
    <author>Thekla Schulz-Brize</author>
    <author>Florian Fleischmann</author>
    <author>Wolfgang Kusterle</author>
    <author>Anne Beer</author>
    <author>Bernd Wagner</author>
    <author>Thomas Neidhart</author>
    <series>
      <title>Forschungsberichte der OTH Regensburg</title>
      <number>2013</number>
    </series>
    <collection role="institutes" number="HL">Hochschulleitung/Hochschulverwaltung</collection>
    <collection role="othpublikationsherkunft" number="">Von der OTH Regensburg herausgegeben</collection>
    <collection role="institutes" number="IAFW">Zentrum für Forschung und Transfer (ZFT ab 2024; vorher: IAFW)</collection>
    <collection role="persons" number="sternerfenes">Sterner, Michael (Prof. Dr.) - FENES / Forschungsgruppe Energiespeicher</collection>
    <thesisPublisher>Ostbayerische Technische Hochschule Regensburg</thesisPublisher>
    <file>https://opus4.kobv.de/opus4-oth-regensburg/files/799/Forschungsbericht_2013.pdf</file>
  </doc>
  <doc>
    <id>1154</id>
    <completedYear/>
    <publishedYear>2014</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2021-02-06</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">An Efficient Spin-Lock Based Multi-Core Resource Sharing Protocol</title>
    <abstract language="eng">We present in this paper a new lock-based resource sharing protocol PWLP (Preemptable Waiting Locking Protocol) for embedded multi-core processors. It is based on the busy-wait model and works with non-preemptive critical sections while task may be preempted by tasks with a higher priority when waiting for resources. Our protocol can be applied in partitioned as well as global scheduling scenarios, in which task-fix, job-fix or dynamically assigned priorities may be used. Furthermore, the PWLP permits nested requests to shared resources. Finally, we present a case study based on event-based simulations in which the FMLP (Flexible Multiprocessor Locking Protocol) and the proposed PWLP are compared.</abstract>
    <parentTitle language="deu">33rd IEEE International Performance, Computing, and Communications Conference (IPCCC), Austin (TX), USA,  5-7 December 2014</parentTitle>
    <identifier type="doi">10.1109/PCCC.2014.7017090</identifier>
    <enrichment key="opus.source">publish</enrichment>
    <author>Martin Alfranseder</author>
    <author>Michael Deubzer</author>
    <author>Benjamin Justus</author>
    <author>Jürgen Mottok</author>
    <author>Christian Siemers</author>
    <collection role="institutes" number="FakEI">Fakultät Elektro- und Informationstechnik</collection>
    <collection role="othforschungsschwerpunkt" number="16311">Digitalisierung</collection>
    <collection role="institutes" number="">Laboratory for Safe and Secure Systems (LAS3)</collection>
  </doc>
  <doc>
    <id>1153</id>
    <completedYear/>
    <publishedYear>2014</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2021-02-06</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">An Efficient Partitioning Strategy for Runnables in Weakly Dependent Tasks on Embedded Multi-Core Systems</title>
    <abstract language="eng">With multi-core controllers entering the area of automotive control ECUs, strategies for parallelizing the control- algorithms come into focus. This paper deals with a special part of automotive powertrain software, called state transitions. Since dependencies between runnables executed there are weak, the transitions provide a good basis for parallelization. We present a strategy of how to distribute efficiently the execution of runnables to different cores while taking care of inner and outer dependencies. The strategy is accompanied by two case studies demonstrating the performance of the concept. The first one is carried out to find the most efficient strategies of parallelize state transitions based on randomly generated, simulated state transitions. In the second one, the developed partitioning strategies are applied to a real software project for an automotive powertrain system.</abstract>
    <parentTitle language="eng">Embedded real-time software and systems (ERTS² 2014), Feb 2014, Toulouse, France</parentTitle>
    <enrichment key="opus.source">publish</enrichment>
    <author>Martin Alfranseder</author>
    <author>Tobias Krapf</author>
    <author>Ralph Mader</author>
    <author>Michael Niemetz</author>
    <author>Jürgen Mottok</author>
    <author>Christian Siemers</author>
    <collection role="institutes" number="FakEI">Fakultät Elektro- und Informationstechnik</collection>
    <collection role="othforschungsschwerpunkt" number="16311">Digitalisierung</collection>
    <collection role="institutes" number="">Labor Datenkommunikation</collection>
    <collection role="institutes" number="">Laboratory for Safe and Secure Systems (LAS3)</collection>
  </doc>
  <doc>
    <id>1198</id>
    <completedYear/>
    <publishedYear>2013</publishedYear>
    <thesisYearAccepted/>
    <language>deu</language>
    <pageFirst/>
    <pageLast/>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName>Vogel Business Media</publisherName>
    <publisherPlace>Würzburg</publisherPlace>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2021-02-06</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="deu">Synchronisationsverfahren in embedded Multicoresystemen</title>
    <parentTitle language="deu">Tagungsband, 6th Embedded Software Engineering, Kongress 2013, 2. bis 6. Dezembern 2013, Sindelfingen</parentTitle>
    <enrichment key="opus.source">publish</enrichment>
    <author>Martin Alfranseder</author>
    <author>Tobias Krapf</author>
    <author>Jürgen Mottok</author>
    <author>Christian Siemers</author>
    <collection role="institutes" number="FakEI">Fakultät Elektro- und Informationstechnik</collection>
    <collection role="othforschungsschwerpunkt" number="16311">Digitalisierung</collection>
    <collection role="institutes" number="">Laboratory for Safe and Secure Systems (LAS3)</collection>
  </doc>
  <doc>
    <id>1292</id>
    <completedYear/>
    <publishedYear>2019</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1</pageFirst>
    <pageLast>8</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName/>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>2021-02-07</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">On Solving Task Allocation and Schedule Generation for Time-Triggered LET Systems using Constraint Programming</title>
    <abstract language="eng">The amount of safety-critical embedded systems in automotive development is heavily growing. Ensuring their reliability not only increases the complexity of functions but also requires determinism at design and execution time, which is considerably challenging to fulfill and verify for multi-core processors. The Logical Execution Time (LET) is recently recognized in automotive industry as an approach for ensuring deterministic functional behavior. However, to decrease the manual design effort and time for deploying such complex systems to multi-core platforms and for ensuring their strict timing and safety requirements, automatic solutions are needed. This work presents a solution for allocating tasks to multi-core processors and generating a time-triggered schedule for embedded systems considering safety, timing, and LET semantics. The approach we propose solves both challenges by defining them as a Constraint Satisfaction Problem (CSP). To examine our CSP formulation, we use MiniZinc, which is a solver-independent constraint modeling language that can employ a variety of solvers. In a case study, we explore optimizations of an industrial system that are enabled by scheduling and task allocation design decisions. Further, the performance of the proposed solutions is evaluated based on large set of synthetically generated system models.</abstract>
    <parentTitle language="eng">32nd International Conference on Architecture of Computing Systems, ARCS Workshop 2019, 20-21 May 2019, Copenhagen, Denmark</parentTitle>
    <identifier type="url">https://ieeexplore.ieee.org/abstract/document/8836201</identifier>
    <enrichment key="opus.source">publish</enrichment>
    <enrichment key="BegutachtungStatus">peer-reviewed</enrichment>
    <licence>Keine Lizenz - Es gilt das deutsche Urheberrecht: § 53 UrhG</licence>
    <author>Erjola Lalo</author>
    <author>Raphael Weber</author>
    <author>Andreas Sailer</author>
    <author>Jürgen Mottok</author>
    <author>Christian Siemers</author>
    <collection role="institutes" number="FakEI">Fakultät Elektro- und Informationstechnik</collection>
    <collection role="othforschungsschwerpunkt" number="16311">Digitalisierung</collection>
    <collection role="institutes" number="">Laboratory for Safe and Secure Systems (LAS3)</collection>
  </doc>
  <doc>
    <id>5525</id>
    <completedYear/>
    <publishedYear>2022</publishedYear>
    <thesisYearAccepted/>
    <language>eng</language>
    <pageFirst>1</pageFirst>
    <pageLast>6</pageLast>
    <pageNumber/>
    <edition/>
    <issue/>
    <volume/>
    <type>conferenceobject</type>
    <publisherName>IEEE</publisherName>
    <publisherPlace/>
    <creatingCorporation/>
    <contributingCorporation/>
    <belongsToBibliography>0</belongsToBibliography>
    <completedDate>--</completedDate>
    <publishedDate>--</publishedDate>
    <thesisDateAccepted>--</thesisDateAccepted>
    <title language="eng">Overhead-Aware Schedule Synthesis for Logical Execution Time (LET) in Automotive Systems</title>
    <abstract language="eng">The Logical Execution Time (LET) has recently been integrated in multi-core automotive systems to ensure timing and dataflow determinism. Although buffering mechanisms are introduced to incorporate LET semantics, they do not guarantee that tasks are executed within their LET frames. In fact, LET and buffering semantics are violated if scheduling is not designed to execute all tasks within their LET frames and in a specific order. In this paper, we describe a scheduling synthesis technique for Fixed-Priority Scheduling (FPS) to achieve resource-efficient execution of LET systems. The proposed approach considers LET semantics, scheduling overheads, and delays caused by operating system operations and provides the possibility to optimize the schedule with respect to aspects like scheduling overheads. Our performance and feasibility evaluation shows that the proposed algorithm provides results in a reasonable amount of time for models of complex industrial applications. Thus, the integration of the proposed algorithm into an automated process is of high benefit to accelerate the development of vehicle applications.</abstract>
    <parentTitle language="eng">2022 IEEE 35th International System-on-Chip Conference (SOCC): 05-08 September 2022, Belfast, United Kingdom</parentTitle>
    <identifier type="isbn">978-1-6654-5985-3</identifier>
    <identifier type="doi">10.1109/SOCC56010.2022.9908103</identifier>
    <enrichment key="opus.import.date">2022-10-28T17:12:32+00:00</enrichment>
    <enrichment key="opus.source">sword</enrichment>
    <enrichment key="opus.import.user">importuser</enrichment>
    <enrichment key="BegutachtungStatus">peer-reviewed</enrichment>
    <licence>Keine Lizenz - Es gilt das deutsche Urheberrecht: § 53 UrhG</licence>
    <author>Erjola Lalo</author>
    <author>Andreas Sailer</author>
    <author>Jürgen Mottok</author>
    <author>Christian Siemers</author>
    <collection role="institutes" number="FakEI">Fakultät Elektro- und Informationstechnik</collection>
    <collection role="othforschungsschwerpunkt" number="16312">Energie und Mobilität</collection>
  </doc>
</export-example>
