Browsing by Author "Obermaier, Christina"

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    Limitations of HIL Test Architectures for Car2X Communication Devices and Applications
    (2019-09-13) Al-Bayatti, Ali Hilal; Obermaier, Christina; Khan, Sarmadullah; Facchi, Christian; Riebl, Raphael
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    Measuring the Realtime Capability of Parallel-Discrete-Event-Simulations
    (MDPI, 2021-03-10) Obermaier, Christina; Riebl, Raphael; Al-Bayatti, Ali Hilal; Khan, Sarmadullah; Facchi, Christian
    Speeding up Discrete Event Simulations (DESs) is a broad research field. Promising Parallel Discrete Event Simulation (PDES) approaches with optimistic and conservative synchronisation schemes have emerged throughout the years. However, in the area of real-time simulation, PDESs are rarely considered. This is caused by the complex problem of fitting parallel executed DES models to a real-time clock. Hence, this paper gives an extensive review of existing conservative and optimistic synchronisation schemes for PDESs. It introduces a metric to compare their real-time capabilities to determine whether they can be used for soft or firm real-time simulation. Examples are given on how to apply this metric to evaluate PDESs using synthetic and real-world examples. The results of the investigation reveal that no final answer can be given if PDESs can be used for soft or firm real-time simulation as they are. However, boundary conditions were defined, which allow a use-case specific evaluation of the real-time capabilities of a certain parallel executed DES. Using this in-depth knowledge and can lead to predictability of the real-time behaviour of a simulation run.