Dietbert Gütter

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This paper presents static load and performance models for Ethernet LAN and WLAN. Relevant problems of the Internet protocol stack (OSI layers 1-4) are considered, namely identification of mean loads and modeling of wired and wireless LANs with the help product-form queuing analysis. This work appeared in scope of the network design environment CANDY as one(More)
Prominent tools for design of WLAN and WiMAX networks are examined and compared. Despite of the evident advantages of current tools there is a wide field for future improvements. Simulation tasks for wireless networks with increased accuracy and adequacy require execution of multiple computing steps. Algorithms like the Dominant Path Prediction Model with(More)
The important construction paradigms, the technological and energy efficiency in Distributed Computing are examined within the paper. The most responsible parameters like performance, speedup, energy consumption, PUE, ERE etc. are discussed. The case studies which are dedicated to Fog Computing, VM migration and utilization of waste heat in the clouds are(More)
Nowadays, the networks with different technologies and functionality become integrated in each other more and more and can be considered as combined networks. The design problems of such networks are close to the traditional design issues in communication networks. However, they are still conceived and designed separately. This paper discusses the(More)
This paper examines different aspects of and approaches to capacity analysis of combined (wired/wireless) local area networks. First, different approaches to load estimation are examined. Then, capacity analyses of the considered network can be carried out based on the gained information. This paper addresses methods on the basis of queueing theory and(More)
This article examines the supporting mathematical methods for modeling and simulation of computer networks. The authors discuss approaches to composition of analysis-able mathematical models for computer networks. The DFG (Dichromatic Functional Graph) is investigated as a relevant theoretical basis. Furthermore, the approaches to modeling of elements and(More)
This work is a part of CANDY research project. Computer-processed building models are used as data sources for optimized cabling tracing in buildings LAN-inside as well as constellation of access points (AP) or basis stations (BS) in WLAN and WiMAX-nets. The imported building geometry models are used in propagation models and visualization methods(More)
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