Simulation

Simulation tools are of vital importance to explore the technical feasibility and facilitate the distributed process of vehicle infra­struc­ture design. CoRE is working on simulation models for the event-based simulation of real-time Ethernet protocols and state-of the art field busses. Our Real-time Ethernet simulation model is published as open-source module.

To evaluate the feasibility of an Ethernet-based unified communication infrastructure for future in-vehicle applications, it is important to identify characteristic and comparable network metrics. A future option of technological and economic success can be only made on the ground of these valid performance estimates. Further, a detailed quantitative analysis allows for optimisations, including a critical view on proposed solutions, and can be used to rate improvements of the components and protocols. Event-based simulation is suitable for these analyses and provides the necessary performance estimates. Since automotive applications have very strict requirements – usually the temporal precision must be within a few microseconds – it is necessary to simulate the temporal behaviour with high accuracy.

During the development process of a car, several service providers and suppliers are involved. Different components are designed by various partners. The Original Equipment Manufacturer (OEM) is responsible for the design and configuration of the in-vehicle communication infrastructure. Temporal attributes and information about the load of an in-vehicle backbone are necessary at an early stage of the development, when the components are not yet available. Further extensions and build-to-order variants must be regarded and result in a large configuration space. Thus, a simulation-based evaluation strategy is indispensable for the design of an in-vehicle backbone. It allows the evaluation of different configuration parameters before construction and in a more comprehensive manner. Requirements for suppliers and service providers are assigned based on the simulation results.

Publication related to simulation:

  • T. Steinbach, H. Dieumo Kenfack, F. Korf, and T. C. Schmidt. An Extension of the OMNeT++ INET Framework for Simulating Real-time Ethernet with High Accuracy. In Proceedings of the 4th International ICST Conference on Simulation Tools and Techniques, SIMUTools '11, pages 375-382, ICST, Brussels, Belgium, Belgium, 2011. ICST (Institute for Computer Sciences, Social-Informatics and Telecommunications Engineering).(PDF, Slides, BibTeX)
    @InProceedings{   sdkks-eifre-11,
      author        = {Till Steinbach AND Hermand {Dieumo Kenfack} AND Franz Korf
                      AND Thomas C. Schmidt},
      title         = {{An Extension of the OMNeT++ INET Framework for Simulating
                      Real-time Ethernet with High Accuracy}},
      booktitle     = {Proceedings of the 4th International ICST Conference on
                      Simulation Tools and Techniques},
      location      = {Barcelona, Spain},
      year          = 2011,
      pages         = {375--382},
      publisher     = {ICST (Institute for Computer Sciences, Social-Informatics
                      and Telecommunications Engineering)},
      address       = {ICST, Brussels, Belgium, Belgium},
      isbn          = {978-1-936968-00-8},
      abstract      = {Real-time extensions to standard switched Ethernet widen
                      the realm of computer networking into the time-critical
                      domain. These technologies have started to establish in
                      process automation, while Ethernet-based communication
                      infrastructures in vehicles are novel and challenged by
                      particularly hard real-time constraints. Simulation tools
                      are of vital importance to explore the technical
                      feasibility and facilitate the distributed process of
                      vehicle infrastructure design. This paper introduces an
                      extension of the OMNeT++ INET framework for simulating
                      real-time Ethernet with high temporal accuracy. Our module
                      implements the TTEthernet protocol, a real-time extension
                      to standard Ethernet that is proposed for standardisation.
                      We present the major implementation aspects of the
                      simulation model and apply our tool to an abstract
                      in-vehicle backbone. A careful evaluation that compares our
                      results with calculations obtained from a mathematical
                      framework, as well as with real-world measurements using
                      TTEthernet hardware shows simulation and reality in good
                      agreement.},
      series        = {SIMUTools '11}
    }
  • T. Steinbach, F. Korf, and T. C. Schmidt. Simulation und Evaluation von Echtzeit-Ethernet in Fahrzeugnetzen. PIK - Praxis der Informationsverarbeitung und Kommunikation, 35(2):67-74, May 2012.(BibTeX)
    @Article{         sks-seeef-12,
      author        = {Till Steinbach AND Franz Korf AND Thomas C. Schmidt},
      title         = {{Simulation und Evaluation von Echtzeit-Ethernet in
                      Fahrzeugnetzen}},
      journal       = {PIK - Praxis der Informationsverarbeitung und
                      Kommunikation},
      month         = may,
      year          = 2012,
      pages         = {67--74},
      volume        = {35},
      number        = {2},
      publisher     = {De Gruyter},
      address       = {Berlin},
      issn          = {0930-5157}
    }
    

Further papers, theses and reports can be found in the publications section.

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