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Mobile Communications

Topic

Feedbacksysteme

Kind of work:
Advanced Seminar
Supervisor:
Dipl.-Inf. Philipp Drieß
Dipl.-Inf. Stephan Bärwolf
Students:
Stefan Kämmer
Status:
finished
Abstract:

Topic

Datenvorhersage / Servicevorhersage

Kind of work:
Diploma Thesis
Supervisor:
Dipl.-Inf. Philipp Drieß
Dipl.-Inf. Stephan Bärwolf
Students:
Sebastian Galek
Status:
finished
Abstract:

Topic

Selbstorganisierte Diensteplatzierung in Grid-Computing

Kind of work:
Advanced Seminar
Supervisor:
Dipl.-Inf. Christian Brosch
Students:
Christina Melle
Status:
finished
Abstract:
In this workout the self-organized placement of services based on gridcomputing
will be considered. First it is given an overview on the basic denition and appli-
cability of the grid technology. This is followed by an introduction to algorithmic
ideas realizing the given problem. An importend part of them is the denition of
a so called partial objective function which gives the opportunity to validate the
placement of services on servers to nd the best one.

Topic

Vergleich bekannter "Future Internet"-Ansätze anhand vorhandener Implementierungen

Kind of work:
Bachelor Thesis
Supervisor:
Dr.-Ing. Thomas Volkert
Students:
Steffen Werfel
Status:
finished
Abstract:
In der Bachelorarbeit werden drei Modelle des Future Internets untersucht. Bei diesen Modellen handelt es sich um das Peer-to-Peer-Overlay-Netzwerk Ariba, die Autonomic Network Architecture (ANA) und die serviceorientierte Netzwerkarchitektur SONATE. Zu Beginn erfolgt die Vorstellung der Architekturen sowie der grundlegenden Konzepte und Bestandteile dieser Modelle. Es wird festgestellt, dass sich die Architekturen von ANA und SONATE ähneln. Anschließend werden die Implementierungen von Ariba und ANA hinsichtlich der Vorgehensweise zur praktischen Nutzung analysiert. Aufbauend auf den mitgelieferten Beispielimplementierungen wird für die beiden praktisch untersuchten Frameworks jeweils eine Applikation zum zeichenbasierten Nachrichtenaustausch entwickelt. Mit diesen Anwendungen werden die theoretischen Möglichkeiten in praktischen Anwendungsszenarien untersucht. Zudem wird der Kommunikationsmehraufwand bei der Nutzung der Frameworks in bestimmten Anwendungsfällen analysiert und verglichen. Es wird festgestellt, dass Ariba die Kommunikation über Netzgrenzen hinaus ermöglicht. Der Fokus von ANA liegt dagegen auf dem Bereitstellen einer Infrastruktur zum Austauschen und Verarbeiten von Daten, nicht auf der Implementierung der spezifischen Protokolle. Bei der Untersuchung der Kommunikationsvorgänge wurde ein wesentlich größerer Overhead bei der Nutzung von Ariba im Vergleich zum Einsatz von ANA festgestellt.

Topic

Route repair in Forwarding on Gates

Kind of work:
Project Work
Supervisor:
Dr.-Ing. Florian Liers
Students:
Robert Kaltenhaeuser
Manuel Osdoba
Status:
finished
Abstract:
Goal of this project seminar was the enhancement of an existing infrastructure for an investigation of different routing recovery strategies like global, local or rerouting from detector - programmed in the forwarding on gates simulator frogger. On one hand there are changes regarding the node infrastructure in frogger itself and on the other hand you find adjustments necessary to run rerouting tests in a distributed environment. Topologies were created with BRITE with respect to WAXMAN- and GLP-strategy. In our tests a forwarding node in the middle is broken. Used topologies differ in connectivity - router and autonomous system level.

Topic

Packet injection and reception within a Java environment

Kind of work:
Project Work
Supervisor:
Dr.-Ing. Thomas Volkert
Students:
Markus Hartwig
Michael Kirchhoff
Status:
finished
Abstract:

Topic

Evaluation and Comparison of Service Placement Algorithms in Communication Networks

Kind of work:
Diploma Thesis
Supervisor:
Dipl.-Inf. Christian Brosch
Students:
Imad Kailouh
Status:
finished
Abstract:

Topic

Design of a flexible GUI for CommonSim

Kind of work:
Project Work
Supervisor:
Dipl.-Inf. Markus Brückner
Students:
Silvio Tristram
Status:
finished
Abstract:

Topic

Implementation of transport protocols

Kind of work:
Advanced Seminar
Supervisor:
Dr.-Ing. Florian Liers
Students:
Udo Peschek
Status:
finished
Abstract:
This work gives a general idea of available implementations of transport protocols. That is, it
shows for which protocols implementations are available, how up to date they are, what features
they have and how to access them.

Topic

QoS management on hierarchical routing

Kind of work:
Advanced Seminar
Supervisor:
Dr.-Ing. Thomas Volkert
Students:
René Hutschenreuter
Status:
finished
Abstract:
Die Arbeit beschäftigt beschäftigt sich mit Routingverfahren für große Netzwerke. Es wird hierarchisches Quality-of-Service Routing genauer betrachtet. Die untersuchten Verfahren sollen innerhalb der vorhandenen Topologie
eine sinnvolle Aggregation der Links durchführen können. Die Informationen über die speziellen Eigenschaften, wie z.B. Bandbreite und Verzögerung, sollen dabei nicht verloren
gehen. Auf der entstandenen Hierarchie sollen Pfade gefunden werden, die bestimmte Benutzeranforderungen erfüllen und somit Routing mit QoS-Unterstützung ermöglichen.

Topic

Compact routing in todays and future networks

Kind of work:
Advanced Seminar
Supervisor:
Dr.-Ing. Thomas Volkert
Students:
René Hutschenreuter
Status:
finished
Abstract:
Die Arbeit beschäftigt beschäftigt sich mit Routingverfahren für große Netzwerke. Es wird untersucht, ob es Verfahren gibt, die auch bei sehr großen Netzen mit verhältnismäßig kleinen Routingtabellen auskommen. Dazu wird versucht Routinginformationen einzusparen, indem die vorhandene Topologie in eine Hierarchie eingebettet wird. Es werden Routinginformationen für Teilabschnitte dieser Hierarchie
zusammengefasst. Diese Verfahren werden deshalb auch als kompakte Routingverfahren bezeichnet. Sie benutzen meist hierarchische Routingalgorithmen, um möglichst kurze Pfade
zwischen Knotenpunkten des Netzwerkes zu finden.

Topic

Linux-basiertes Testbed zur Evaluierung von Adressierungsprotokollen in Ad hoc Netzwerken

Kind of work:
Diploma Thesis
Supervisor:
Dr. Ausama Yousef
Dipl.-Inf. Philipp Drieß
Students:
Yifeng Tang
Status:
finished
Abstract:

Topic

Channel Assignment (CA) Schemes for CRAHN

Kind of work:
Advanced Seminar
Supervisor:
M.Sc.-Ing. Omar H. Ahmed
Status:
finished
Abstract:

Topic

Simulation software for Internet routing

Kind of work:
Advanced Seminar
Supervisor:
Dr.-Ing. Florian Liers
Students:
Carmen Brunner
Status:
finished
Abstract:
Available in German only.

Topic

Connectionless communication in a Forwarding on Gates network

Kind of work:
Bachelor Thesis
Supervisor:
Dr.-Ing. Florian Liers
Students:
Daniel Renner
Status:
finished
Abstract:
Not available.

Topic

Hierarchical routing in context of the Future Internet approach "Forwarding on Gates"

Kind of work:
Diploma Thesis
Supervisor:
Dr.-Ing. Thomas Volkert
Students:
Stefan-Wieland Kögel
Status:
finished
Abstract:
The diploma thesis focuses on the conception and evaluation of a flexible hierarchical routing service for the Future Internet approach „Forwarding on Gates„ (FoG). It determines the theoretical aspects and fundamentals for a later implementation of a FoG based routing service. Initially, specific requirements for a hierarchical routing service are analyzed. Afterwards, different existing routing protocols as well as hierarchical routing approaches are examined and described. BGP, OSPF and HSR are in the main focus. Based on this a concept for the required routing service is developed. The concept considers scalability and flexibility, addionally quality of service and mobility were kept in mind during design process of the service.
Every process done internally in the routing service is described by sequence charts and defined protocol data units. Moreover, a description of a possible way for adaptating known routing protocols is included.
Finally the conception is evaluated analytically byased on defined scenarios and typical error cases.

Topic

Evaluation and demonstration of linux-based source developer kits for WLAN-accespoints

Kind of work:
Project Work
Supervisor:
Dipl.-Inf. Philipp Drieß
Dipl.-Inf. Stephan Bärwolf
Status:
finished
Abstract:

Topic

Interoperability between the Internet protocol IP and the Future Internet approach "Forwarding on Gates"

Kind of work:
Diploma Thesis
Supervisor:
Dr.-Ing. Thomas Volkert
Students:
Frank Roth
Status:
finished
Abstract:
This diploma thesis deals with the aspects of interoperability between today's internet protocol IP and the future internet approach "Forwarding on Gates” (FoG).
It covers an introduction to the topic and a summary of relevant research work in the area of interoperability and address translation. Furthermore the functional and non-functional requirements for an interopability concept are analyzed. The thesis provides a transparent translation of IP and FoG based packets and addionally it illustrates an autonomous working configuration idea where good scalability were one of the main design aspects. The proposed approach is based on InterOp-hosts and IP-wrappers. It is similar to the NAT-PT concept. In addition, more variations for addressing and identification to permit concept modifications and extensions are shown. The typical procedures and interactions between components are presented and explained. Within the work also complexity discussions are included, which discuss the scalability and feasibility of the concept. In the end, an evaluation of the concept for interoperability between IP and FoG is described which was done with the help of a Java based simulator of the department. The functionality of the concept was validated by several practical scenarios.

Topic

Special transport procols for a Future Internet

Kind of work:
Advanced Seminar
Supervisor:
Dr.-Ing. Florian Liers
Students:
Udo Peschek
Status:
finished
Abstract:
In the 1970-s Delta-t was developed at LINCS as timer-controlled universal transport protocol and it is able to put on at non connected network layer protocols . It needs comparatively few packages, that serve for the pure connecting-management.
For that reason it is especially suitable for short questions and answers that arise within the scorpe of client-/server-applications.
This brainwork explains the special mechanisms of connecting management and shows the structure and composition of the several Delta-t Packet-Header-Types and it gives an overview about the needed service of network layer and possible services for the aplication layer.

Topic

Local and global route management in the Future Internet

Kind of work:
Diploma Thesis
Supervisor:
Dr.-Ing. Florian Liers
Students:
Sebastian Messing
Status:
finished
Abstract:
This thesis studies methods to recover from failures in the future Internet by determining alternative routes. Considering present recovery methods, methods adapted to the approach "Forwarding on Gates" are designed and validated by simulation using a snapshot of the Internet topology.

Topic

Comparison of self-organized approaches based on Peer-To-Peer systems for group communication

Kind of work:
Advanced Seminar
Supervisor:
Dipl.-Inf. Christian Brosch
Students:
René Schmidt
Status:
finished
Abstract:
(see German)

Topic

Mobility Robust Optimization in Self Organized Networks (SONs)

Kind of work:
Advanced Seminar
Supervisor:
Dr.-Ing. Ali Diab
Dr.-Ing. Muhammad Naseer ul Islam
Status:
finished
Abstract:

Topic

Automatic Neighbor Relations (ANRs) in Self Organized Networks (SONs)

Kind of work:
Advanced Seminar
Supervisor:
Dr.-Ing. Ali Diab
Dr.-Ing. Muhammad Naseer ul Islam
Status:
finished
Abstract:

Topic

Cooperative multi tasking as a basis for the implementation of blocking function calls in network simulators

Kind of work:
Advanced Seminar
Supervisor:
Dipl.-Inf. Markus Brückner
Students:
Markus Hartwig
Status:
finished
Abstract:

Topic

Evaluation of QoS management architectures for heterogenous satellite based networks

Kind of work:
Student research project
Supervisor:
Dipl.-Inf. Philipp Drieß
Dr.-Ing. Thomas Volkert
Students:
Stefan-Wieland Kögel
Status:
finished
Abstract:
Ausgehend von einer Erläuterung der Grundlagen zum Thema Quality of Service und den beiden dazugehörigen grundlegenden Ansätzen Integrated Service und Differentiated Service, wird das Problem eines Quality of Service - Managementframeworks für ein heterogenes satellitengestützten Netzwerk näher betrachtet werden. Dazu werden in dieser Arbeit, auf Grundlage eines heterogenen satellitenbasierten Netzwerkes, Bewertungskriterien erstellt und erklärt, welche zum Vergleich ausgewählter Quality of Service – Managementframeworks benutzt werden. Diese Kriterien werden vorher detailliert beschrieben, um einen fundierten Vergleich zu ermöglichen.
Darauf basierend wird eine Empfehlung erörtert, wie ein solches Quality of Service - Managementsystem konzipiert sein sollte, um die Anforderungen eines heterogenen satellitenbasierten Netzwerks zu erfüllen.
Als Basis dafür dient dass, vom Projekt „Mobile Satellitenkommunikation im Ka-Band“ konzipierte, heterogene satellitenbasierte Netzwerk zur Unterstützung von komplexen und dynamischen Krisenszenarien mit unabhängigen, hoch mobilen und breitbandigen Kommunikationsmitteln.

Topic

Transport protocols for a Future Internet

Kind of work:
Advanced Seminar
Supervisor:
Dr.-Ing. Florian Liers
Students:
Daniel Zapf
Status:
finished
Abstract:
The topic of this advanced seminar is the transport layer and shows a short overview about the transport service, whose realisation by transport protocol features and their implementation in different transport protocols. In doing this the emphasis is layed on how these protocols can be used in future internet and are able to cooperate with TCP or can even rule out TCP.

Topic

Connection establishment with the future Internet approach Forwarding on Gates

Kind of work:
Diploma Thesis
Supervisor:
Dr.-Ing. Florian Liers
Students:
Martin Bengsch
Status:
finished
Abstract:
This diploma thesis is about the connection establishment under future internet approach
Forwarding on Gates (FoG) and all therefore required conceptional basics and functionalities.
The attention is directed to the modeling of QoS requirements and signaling in
FoG messages, especially for connection establishment. In addition to that, there has been
more researching on structure and chronology of this messages to discover consolidation
and reduction possibilities for optimization of the data volume to increase eciency and
stability. On top of this theoretical examinations an evaluation is performed to prove capability
of this models and provide a partial proof of the practicability of the Forwarding
on Gates concepts.

Topic

Concept and Implementation of a Campus-wide WiFi System

Kind of work:
Student research project
Supervisor:
Dipl.-Inf. Markus Brückner
Students:
Matthias Vierling
Status:
finished
Abstract:

Topic

Evaluation of some address auto-configuration protocols in ns2

Kind of work:
Project Work
Supervisor:
Dr. Ausama Yousef
Students:
Imad Kailouh
Samer Rishe
Status:
finished
Abstract:

Topic

A Comparative Study for Cognitive Radio MAC Protocols

Kind of work:
Diploma Thesis
Supervisor:
Dr.-Ing. Mohamed Abdrabou Kalil
Students:
Saleh Hussin
Status:
finished
Abstract: