Dietbert Gütter

Cross-layered wireless network planning and modeling methods and tools

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 fine raster step and exponential complexity has to be compulsory parallelized. The peculiarities of accurate cross-layered simulation within CANDY tools are examined. Parallelization programming techniques are represented.

Integrated design of office communication and building automation networks

Building automation communication systems become today more and more integrated in office communication networks using Ethernet. The paper considers integrated design of both networks, which will allow to use the cable and server infrastructure more effectively. Types of information that should be exchanged between design tools are considered. An approach to contributive using and exchange of design information with the help of XML and XSL transformations is proposed and illustrated by a case study.

Integrated design tools for combined LAN

Nowadays high-performance combined wired and wireless LANs are of great importance for companies and organizations of any size. However, efficient remains a challenge, since existing design tools only provide limited and hardly integrated support. The CANDY project was launched in 2003 with the aim to improve this situation by proposing an integrated design methodology with extensive tool support for all network design sub-tasks. This paper illustrates the CANDY network design methodology by giving an overview of the integrated design approach and presenting two advanced algorithms for design of wireless local area networks.

Models and Methods for WLAN / WIMAX-Network Design

Parallel with the traditional cabled solutions for the enterprise communication networks (CN) based on Ethernet/ATM LANs the WLAN/WiMAX networks (world wide interoperability for microwave access) became more significant as the wireless routes. Therefore wireless network design is closely tied to the traditional design problems for infrastructure CN. Certain models and design methods are examined in this paper

Design particularities for wireless networks

Particularities of design for innovative wireless networks-WLAN and WiMAX-are examined. Models and methods for wireless networks design are investigated. Main requirements as well as integration way into a XML-based network design environment is shown

Network Design and Optimization Under Use of Candy Framework

CANDY, computer-aided network design utility is a Java-framework for an efficient XML-based integrated network design environment developed via CANDY@TUD initiative. This paper examines CANDY network design tools including graphical input and topology verification, cabling system tracing and APIBS constellation (AP-access point, BS-basis station), performance analysis with feed-backs to reengineering procedures. In the investigation focus stand cabling system geometry and costs optimization. The integrating component for these design tools is NDML (network design markup language), XML-based problem-oriented language developed for representation of design data and workflow consisting of the following special parts: NDML basics, topology, performance, radioNDML for radio-networks etc

Concept of integrated environment for network design

This work examines CANDy and NDML concepts. CANDy, Computer Aided Network Design utility is a concept for an efficient XML-based integrated network design environment. Its integrating components are NDML (Network Design Markup Language), an XML-based problem-oriented language developed for representation of information components related to network projecting within documents. Its design supports interoperability with the XML family of tools and protocols. It provides a set of components to meet the needs of network design

Einsatz neuer Medien in der Rechnernetze-Ausbildung an der TU Dresden

Neue Medien ermoglichen innovative Konzepte in der universitaren Lehre. Am Beispiel der Rechnernetze-Ausbildung an der TU Dresden wird aufgezeigt, wie diese Moglichkeiten aktiv genutzt werden konnen, welche neuen Chancen hierdurch entstehen, aber auch welche technischen und organisatorischen Probleme zu losen sind. Schwerpunkte des Beitrags umfassen die Darstellung innovativer Lehrinhalte in Vorlesungen, Ubungen und Praktika zu Rechnernetzen, den Einsatz von Animationen zur Illustration komplexer Sachverhalte, die Aufbereitung interaktiver Materialien unter Nutzung von Java, die Online-Interaktion zwischen Studenten und Ubungsleitern via Internet und Intranet sowie die selektive Einbindung von Videomaterialien im Rahmen von Teleteaching. Diese Szenarien werden schlieslich zu einer integrierten Lehr- und Lernumgebung zusammengefuhrt, die derzeit realisiert wird.

Netzwerkqualität und Netzwerkanalyse. Tools zur Netzplanung

Motivation. Die Effizienz von Unternehmen aller Grosenordnungen, offentlichen Organisationen und Universitaten wird wesentlich durch die Leistungsfahigkeit ihrer Rechnernetze bestimmt. Diese umfassen in der Regel kabelgebundene und drahtlose LAN und werden durch mobile Kommunikationsnetzwerke erganzt. Der Entwurf derartiger komplexer Netze wird gegenwartig nur ungenugend durch CAD-Tools unterstutzt.

Logische Strukturierung komplexer Netze

Kapitel 6 prasentiert die Strukturierung komplexer Netze, d. h. die Adressplanung, Subnetzbildung und den Einsatz der Protokolle NAT, PAT, IPsec und Mobile IP im Internet/Intranet, weiterhin Migrationsaspekte von IPv4 zu IPv6, Virtualisierungsund -integrationstechniken fur Server und Netzwerke, wie z. B. VPN, NAS, SAN und MPLS. Weiterhin befasst sich das Kapitel mit technischen und rechtlichen Aspekten von Datensicherheit gewahrleistenden Anwendungen und Web-Systemen, mit den dazu erforderlichen Technologien und Kommunikationsprotokollen und gibt eine Analyse nationaler Rahmenbedingungen [4]–[6], [7], [8], [24], [25], [26], [27], [28], [29], [21]–[23].