Dr. rer. nat.

Weiß, Gereon

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  • Publication
    Interface verification using executable reference models: An application in the automotive infotainment
    ( 2013)
    Drabek, Christian
    ;
    Pramsohler, Thomas
    ;
    Zeller, Marc
    ;
    Weiß, Gereon
    Modern in-vehicle infotainment systems comprise highly interactive software components. The verification of the interfaces of such components poses a major challenge for developers. In this work, we present an approach for model-based verification of distributed infotainment components. We define a layered reference model which specifies the interaction between two components at syntactical and behavioral level. The layers abstract from the used middleware so developers may focus on the components' actual interface behavior. Additionally, we define a model execution framework which enables the reuse of the reference model for verification of interface implementations. We demonstrate the applicability of the approach using an industrial case study. Our approach aims at reducing errors in the communication behavior and increasing the overall product quality.
  • Publication
    Towards efficient on-line schedulability tests for adaptive networked embedded real-time systems
    ( 2012)
    Becker, Klaus
    ;
    Zeller, Marc
    ;
    Weiß, Gereon
    In networked embedded systems, runtime adaptive software promises an increase of flexibility, fault tolerance and extensibility. Often, this requires that software components have to be allocated dynamically to execution platforms at runtime. Hence, the platforms have to execute dynamically changing task sets. However, in real-time systems, a task set cannot be executes without previously checking its schedulability w.r.t. given timing constraints. Therefore, it has to be determined, whether or not the existing task set would be still schedulable including newly arriving tasks. In this paper, we propose a schedulability test algorithm for such systems, exploiting the situation of adding a new task to an existing task set. Therefore, we adapt existing schedulability tests to exploit the specific acceptance test use case. The benefits of the developed adaptations are shown by experimental investigations.
  • Publication
    Approach for iterative validation of automotive embedded systems
    ( 2010)
    Weiß, Gereon
    ;
    Zeller, Marc
    ;
    Eilers, D.
    ;
    Knorr, Rudi
    Architecture description languages (ADLs) allow specifying system information in architecture models. These are generally used for capturing early design decisions concerning system or software development. Therefore, ADLs can be utilized for an early and iterative validation of the modelled system. With EAST-ADL an automotive specific ADL is defined which allows describing an automotive system at different layers of abstraction targeting AUTOSAR systems. SystemC is an executable system modelling and simulation language which permits Hardware/Software-Co-Design. With the Transaction-Level Modeling (TLM) methodology the description of different layers of abstraction in SystemC is enabled. This work addresses the early validation of automobile electronic systems by providing a transformation of EAST-ADL models to SystemC at different layers of abstraction. This allows specific analysis with Hardware/Software Co-Simulation iteratively in the development process. The proposed approach is realized in a tool-chain and demonstrated by a typical automotive use case. Hence, we show the potential of an early validation of system and software designs based on architecture models.