Gunar Schorcht

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System-level design presents special simulation modeling challenges. System-level models address the architectural and functional performance of complex systems. Systems are decomposed into a series of interacting sub-systems. Architectures define subsystems, the interconnections between subsystems and contention for shared resources. Functions define the(More)
In this paper, we present the combination of two concepts addressing important aspects for smart home services: a new quality of service concept and a new integrated concept for a smart home security system. We assume that every flat in a house has its own smart device to perform local services and act as an interface for the different sensors and actors(More)
In this paper, we present a novel algorithm for improving localization results of unknown wireless nodes (a.k.a. unknowns or mobile nodes). Our proposed solution, Groupwise Universal Improvement Scheme (G-UnIS), is based on additional information about the a priori known distances between mobile nodes. We show with the simulation results that our method can(More)
System-level design presents special simulation modeling challenges. System-level models address the architectural and functional performance of complex systems. Systems are decomposed into a series of interacting sub-systems. Architectures define subsystems, the interconnections between subsystems and contention for shared resources. Functions define the(More)
Networked systems in automobiles and aircraft are designed by groups of people, departments and/or companies of different expertise. Commonly used design methodologies in complex system design partition the work at high level of uncertainty into teams of specialists. These teams have to make assumptions and design decisions without being able to evaluate(More)
During the next years a number of mobile satellite systems (MSS) for low earth orbits (LEO) and for medium earth orbits (MEO) will be available for global personal communications. The most important currently projected systems are Iridium, Globalstar, Odyssey, ICO (formerly Inmarsat-P), and Teledesic. These systems will provide mobile communication from any(More)
In this paper we present a method to realize geographic network traac simulation models. Our approach is based on a hierarchy of traac producing objects. It uses the polymor-phic concept of the object-oriented programming paradigm to realize a traac simulation model for traac sink, and sources with arbitrary properties. We used the method to develop a(More)
In this paper we present methods to generate models of mountainous regions. For these regions statistical methods are unsuitable to predict the service coverage, blocking and termination probabilities for systems involving fast moving satellites. We present methods using modeled terrains to analyze the service coverage in satellite integrated mobile(More)
In this paper we present the HiFAQ Modelling and Simulation language. This language allows the assessment of the functional and performance properties of a heterogeneous embedded system by means of integrated , timed simulation. A typical y-by-wire control system is modelled by means of the HiFAQ technique showing the eeects of diierent implementations on(More)