AutoTech Review, ATZ, May 2015:
Ethernet Architecture - finding a clear strategy

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Leading OEMs have made it very clear that Ethernet is on its way into automotive electronics. Solutions exist, but at the same time, the design space is still very huge. So, automotive OEMs need a clear strategy and tools to answer the questions about the “best” topology, switch architecture, and higher level protocol. Covering all Options with real-time analysis methods is immensely expensive. Hence, the automotive industry, including component suppliers, needs deeper standards as soon as possible. Else, it will be highly unlikely to share the research and development costs among all players. TU Braunschweig via its innovation centre, iTUBS, is developing the foundations; Symtavision is working towards commercial solutions and tools for Ethernet as a backbone technology.

Authors:
Daniel Thiele, Prof. Rolf Ernst, TU Braunschweig, 
Dr. Kai Richter, Jonas Diemer, Symtavision GmbH
 

CAN Newsletter 2/2015:
CAN timing analysis beyond bus load

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CAN will keep playing a major role in future automotive network development – and CAN timing analysis has become a core competence. We take a look at the most important use cases.

CAN Newsletter 2/2015
CAN in Automotion CiA

Author:
Dr. Kai Richter, CTO, Symtavision GmbH
 

ATZ 01/2015:
Timing Evaluation in E/E Architecture Design

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BMW has successfully introduced the systematic application of timing analysis methods into the E/E architecture design process. Each network change request is now subject to an automated, tool-based real-time analysis, which helps accepting or rejecting the request based on important resource and design criteria. This increases the accuracy and productivity of BMW network planning. The next steps will lift the level of automation into E/E architecture decision making.

Authors:
Dan Gunnarsson, Dr. Matthias Traub, Dr. Christian Pigorsch, BMW Group
 

ATZ extra 10/2013: E/E and Software Development Process for Timing-Aware Design

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AUTOSAR is established as the standard solution in development processes of automotive software meanwhile. Symtavision provides an example how to augment the electric and electronic (E/E) as well as the software development process by using AUTOSAR for the timing-aware design.

 

Authors:
Dr. Simon Schliecker, Maurice Sebastian, Symtavision GmbH 

 

ATZ article online

ATZ elektronik 05/2013: Cooperating on Real-Time Capable Ethernet Architecture in Vehicles

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Leading OEMs have made it very clear that Ethernet is on its way into automotive electronics. At the same time, the design space is still very huge. What is the “best” topology, switch architecture, and higher level protocol?
For this, the automotive OEMs need a clear strategy and tools.
TU Braunschweig via its innovation center, iTUBS, is developing the foundations; Symtavision is working towards commercial solutions and tools for Ethernet as a backbone technology. First solutions exist, but the design space is still very large. Covering all Options with real-time analysis methods is immensely expensive. Hence, the automotive industry (including component suppliers) need “deeper” standards as soon as possible. Otherwise it will be highly unlikely to share the Research and development costs among all players.

Authors:
Daniel Thiele, Philip Axer, Prof. Rolf Ernst, TU Braunschweig 
Dr. Kai Richter, Jonas Diemer, Symtavision GmbH

English article for download

This article has been published in the magazine ATZ elektronik 5/2013.

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ATZ elektronik 01/2012:
Design patterns for highly integrated ECUs

The high integration of mixed criticality vehicle functions enables new trends in vehicle electronics but also introduces new, parasitic effects to the timing behavior of such systems. 

This article explains, how Audi and Symtavision have adopted the existing design patterns to the new challenges.

English article for download

This article has been published in the magazine ATZ elektronik 01/2012

 

 

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Hanser Automotive FLEXRAY SPECIAL 2009:
In search for the best migration strategy from CAN to FlexRay

For the migration from CAN to FlexRay, the research and advanced engineering department of Daimler is extending the design process for its future E/E architecture with SymTA/S performance evaluations. This enhancement raises the productivity and provides a systematic and efficient evaluation base for the dimensioning and configuration of network architectures for the next generation.

English article for download.

This article was published in the magazine Hanser Automotive, FLEXRAY SPECIAL 2009.

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ATZ elektronik 03/2009:
Timing Analysis for Verification of Network Architectures

For the evaluation of EE architectures, in particulare the timing and resource requirements, the DAIMLER advanced networking group is counting on the know-how and tools of Symtavision. First results have been published in an article. Based on current problems in the field of time and resource requirements, an approach for the evaluation method in the early E/E architecture stage is illustrated step by step. The required data as well as the tool-chain are presented. Subsequently, a first-hand example is described. In the summary, the authors discuss experiences and introduce next steps.

English article for download.

The article was published in the magazine ATZ elektronik 03/2009.

http://www.atz-elektronik.de/

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ATZ elektronik 01/2009:
The Right Timing Analysis Tools Increase Safety and Productivity

For developing their active front steering system, BMW has considered the software timing from the start of software design. This way, BMW has ensured the correct real-time behavior continuously through measurement and analysis. Tools from Symtavision and Gliwa were integrated tightly into the development process. Finally, BMW successfully increased the safety and decreased hardware cost at the same time.

English article for download!

The article was published in the magazine ATZ elektronik 01/2009.

 

 

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New kid on the block: Scheduling Analysis improves quality and reliability of ECUs, Busses and Networks (P)

A practice-oriented paper with several SymTA/S application examples on OSEK, CAN, and FlexRay published in "Proceedings of Embedded World Conference, Nürnberg, Germany, February 2008":

  • single ECU scheduling analysis
  • OSEK configuration and optimization
  • customization of analysis libraries and plug-ins
  • CAN bus analysis and optimization
  • transitioning from CAN to FlexRay
  • system-level analysis and integration
  • supply-chain considerations
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A Virtual Platform for Architecture Integration and Optimization in Automotive Communication Networks (P)

A practice-oriented paper about roles of OEMs and suppliers in network integration, specifically for CAN, published in "Proceedings of SAE World Congress, Detroit, Michigan, USA, 2007":

  • network integration problem definition
  • OEM and supplier view
  • possible optimizations and required data
  • supply-chain considerations
  • constraints and refinement
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Scheduling Analysis for FlexRay - Why? (P)

Practice-oriented paper on scheduling effects that require consideration when designing FlexRay systems, published in "Proceedings Design & Elektronik Entwicklerforum KFZ-Elektronik, Ludwigsburg, May, 2007":

  • how deterministic is FlexRay timing
  • synchronization of ECU schedules with FlexRay
  • asynchronous ECUs on FlexRay
  • the timing of the dynamic FlexRay segment
  • supply-chain use cases

This paper is only available in German.

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System-Level Performance Analysis - the SymTA/S Approach (S)

Scientific paper introducing the unique SymTA/S technology, published in "IEE Proceedings Computers and Digital Techniques, 2005":

  • introduction into performance modeling
  • SymTA/S application model
  • event streams and interfaces
  • activation modeling
  • context information
  • exploration and sensitivity analysis
  • example
  • rich literature list
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A Framework for Modular Analysis and Exploration of Heterogeneous Embedded Systems (S)

Scientific paper introducing the SymTA/S optimization and exploration technology, published in Kluwer/Springer Journal on Real-Time Systems, Volume 33, Issue 1-3 (July 2006), pp. 101 - 137:

  • formal core of SymTA/S, including application and analysis model
  • related work in exploration and optimization
  • SymTA/S design space exploration approach incl.  search space encoding and the user-controlled exploration strategy
  • realization of the SymTA/S exploration framework based on multi-objective evolutionary exploration techniques
  • several exploration examples of a synthetic SoC example
  • rich literature list
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A Compositional Framework for End-to-End Path Delay Calculation of Automotive Systems under Different Path Semantics (S)

Scientific paper introducing the A Compositional Framework for End-to-End Path Delay Calculation of Automotive Systems under Different Path Semantics, published in Proceedings of the IEEE Real-Time System Symposium (RTSS), Workshop on Compositional Theory and Technology for Real-Time Embedded Systems (CRTS'08), Barcelona, Spain, December 2008:

  • formal definition of end-to-end timing
  • consideration of oversampling and undersampling along "timing chains"
  • systematic introduction in the meaning of end-to-end timing
  • supports "max age" analysis (common in control engineering)
  • supports "first reaction" analysis (common in HMI applications)
  • detailed calculation framework