Silke Feldmann

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This paper presents the experimental evaluation of a Bluetooth-based positioning system. The method has been implemented in a Bluetooth-capable handheld device. Empirical tests of the developed considered positioning system have been realized in different indoor scenarios. The range estimation of the positioning system is based on an approximation of the(More)
Coloured Petri Nets are powerful models for different problems. This paper deals with the modelling of a Bluetooth communication network, piconet and scatternet. The developed Petri Net model is based on the Bluetooth Specification 1.1. The Petri Net model is structured in an hierarchical way. Thus, every part of the model, for example the channel model, is(More)
In the context of the UbiCampus project, the Notebook-seminar was developed in the Institute of Communications Engineering (Institüt für Allgemeine Nachrichtentechnik, IANT) at the University of Hannover. In this seminar the students worked in groups in order to provided a Bluetooth infrastructure for the rooms of the IANT. In this paper the Ubicampus(More)
The method of choice to investigate radio communication systems on a system or network level are computer simulations. The behaviour of the physical layer is often modelled by the error rate (ER) behaviour, e.g. the bit error rate (BER) or packet error rate (PER), of previous detailed investigations of the physical layer. A number of methods are known to(More)
Industrial plant software is implemented in the programming languages of IEC 61131-3. As plant software needs to perform many tasks, it is often highly complex and typically characterized by a monolithic structure. Whereas for high-level programming languages, commonly occurring problems are solved using design patterns, such general reusable solution(More)
—Integrating Multicore Programmable Logic Controllers (PLC) in Networked Automation Systems (NAS) promises a higher computing performance and PLC manufactures are launching their first Multicore PLCs (MPLC). However, analyzing the MPLCs time behavior considering distributing automation tasks on different cores is more complex than analyzing the time(More)
Additive Layer Manufacturing (ALM) provides manufacturing of nearly arbitrary geometries flexibly and economically. The part properties, which are reachable by state-of-the-art systems, are able to fulfill the customer requirements in terms of series and spare part production. Nevertheless, there still arise problems prohibiting the prevalent application of(More)
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