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Mobile Communications

Topic

GEMP Toolbox: Generic Evaluation of Mobility Management Protocols

Kind of work:
Student research project
Status:
finished
Abstract:

Topic

Comparison of available applications for the analysis of communication streams in today's networks

Kind of work:
Student research project
Supervisor:
Dr.-Ing. Thomas Volkert
Students:
Frank Roth
Status:
finished
Abstract:

Topic

Performance measurement and evaluation of protocols within user land

Kind of work:
Bachelor Thesis
Supervisor:
Dr.-Ing. Thomas Volkert
Students:
Thomas Dietrich
Status:
finished
Abstract:
The main task of this thesis was to compare the performance of a user level protocol implementation with the performance of an implementation at the kernel level.
After analyzing the possibilities to generate and to capture network packets a programming environment was developed, which enabled an implementation of network protocols at the user level. Using appropriate measurement concepts and accordingly designed test applications, the performance of the implementation could be measured.
Concluding from the performance evaluation, a protocol implementation at user level is certainly capable of providing a comparable performance in relation to kernel level driven implementations.
Smaller time losses of constant values have been noticed. However, for research purposes, these time losses are negligible. In most cases, when testing network protocol, the functionality and the continuous possibility of modification come to the fore.

Topic

MobileIP in source routing systems

Kind of work:
Student research project
Supervisor:
Dr.-Ing. Florian Liers
Students:
Imad Kailouh
Status:
finished
Abstract:
Mobility is one of the main difficulties facing the implementation of a new Internet architecture.
With routes instead of IP addresses some of the following rules that are used in Mobile IP, will be changed.
In this student research we try to explain how the mobility problem will be achived through building different Mobility scenarios. These scenarios will be only depends on the names like (Mobile Node, Home Agent...) which will be resolved into routes instead of IP addresses to allow the Correspondent Node(CN) to communicate with Mobile Node(MN).

Topic

Implementation and Evaluation of the LHA Protocol in Network Simulator 2

Kind of work:
Diploma Thesis
Supervisor:
Dr. Ausama Yousef
Dr.-Ing. Ali Diab
Students:
Philipp Drieß
Status:
finished
Abstract:
This thesis proposes a possible solution through implementation and evaluation of ad-dress auto configuration protocols in MANETs. First, there is an overview of MANETs along with insights to various routing protocols, such as AODV, DSDVand to ad-dress auto configuration protocols, such as PROPHET and DHAPM. Second, there ist a description of the most common simulators and their valuable contributions for the purposes of this thesis. Finally, the implementation of the LHA protocol in ns2, its evaluation and simulation are outlined in detail.

Topic

Integration of a modular potal bar into arbitrary web pages

Kind of work:
Student research project
Supervisor:
Prof. Dr.-Ing. habil. Andreas Mitschele-Thiel
Students:
Henning Rauch
Status:
finished
Abstract:
This work describes the approach and implementation of a web portal solution using a HTTP proxy. As is the case for most common hotspot solutions (e.g Weimar-ist-DRIN) the user, by accessing a hotspot network, is led first to a central web portal page. Here he/she can register and activate certain services to be shown on the Portal page (like chat functions, RSS feed, weather and much more besides).
The portal page has to be kept open (as in the Weimar-ist-DRIN
scenario) for accounting purpose. So if the page would be closed the user would be logged out by the accounting system automatically.
This is often not realized by the user. That is why a better integration of the portal into the browser envirnonment is desirable.
So the solution developed in this paper consist of a content manupulating HTTP proxy which injects a portal bar with any kind of information in every browser window. This includes login and status, chat, RSS-feeds, weather, webradio and similar data.
The code conversion has to be as modular as possible, so that each user is able to select the desired services in the context of the portal. Additionally the portal bar assures the hotspot connection and the accounting.

Topic

Simulator for a multi-channel MAC protocol in Cognitive Networks

Kind of work:
Project Work
Supervisor:
Dr.-Ing. Florian Liers
Dr.-Ing. Mohamed Abdrabou Kalil
Students:
Micheal Grey
Sebastian Kehr
Status:
finished
Abstract:

Topic

Monitor Placement in IP Networks

Kind of work:
Diploma Thesis
Supervisor:
M.Sc. Abutaleb Abdelmohdi Turky
MSc. CME Nadir Zamin-Khan
Students:
Hang Lin
Status:
finished
Abstract:

Topic

Addressing for incremental routing

Kind of work:
Bachelor Thesis
Supervisor:
Dr.-Ing. Florian Liers
Students:
Daniel Gottwalt
Status:
finished
Abstract:
Available in German, only.

Topic

Entwicklung von Mechanismen für einen kostenoptimierten Verbindungsaufbau für FMC-Privatnetze

Kind of work:
Diploma Thesis
Supervisor:
Prof. Dr.-Ing. habil. Andreas Mitschele-Thiel
Students:
Hoang Nguyen Viet
Status:
finished
Abstract:
Content of this work is to provide a FMC solution for privat networks with a cost-optimized routing. It was carried out an investigation of FMC concepts for private networks based on their architecture, and the technology used. As a result a new LCR concept for FMC was developed. Finally this concept was implemented at an open-source-software-based PBX, tested with different scenarios and evaluated in comparision to other concepts.

Topic

Asia Future Internet activities

Kind of work:
Advanced Seminar
Supervisor:
Dr.-Ing. Florian Liers
Students:
Kai Yang
Status:
finished
Abstract:
Due to the extensive influence from the internet on our society and numerous problems related to IP, which have emerged in the past, a few projects on the subject Future Internet have been activated in Asia. This paper will first deal with the problems caused by IP. Then, it introduces the project CNGI in China in detail, of which the first phase was implemented in 2006. Finally, the paper introduces the project AKARI in Japan as well as a project in Korea.

Topic

Future Internet EU Projects

Kind of work:
Advanced Seminar
Supervisor:
Dr.-Ing. Florian Liers
Students:
Martin Bocksberger
Sebastian Kirchhoff
Status:
finished
Abstract:
The 7th Framework Program includes projects of the Future Internet supported by the European Union. In these essays the main projects are presented in tabular form. The department of Integrated Hard- and Software Systems (IHS) is interested in projects dealing with network architectures.
For that reason the projects 4WARD (Architecture and design for the future Internet) and PSIRP (Publish-subscribe Internet routing paradigm) are explained in detail.

Topic

Simulator for distributed algorithms

Kind of work:
Project Work
Supervisor:
Dr.-Ing. Florian Liers
Dr.-Ing. Mohamed Abdrabou Kalil
Students:
Saleh Hussin
Status:
finished
Abstract:
Many distributed computer networks require one node to act as coordinator or leader to perform some specific function. This project seminar presents algorithms for electing a coordinator in distributed algorithms. It provides a simulator which is written in Java simulator to simulate the performance of the election algorithms in term of number of sent messages to achieve consensus between all nodes about a coordinator.

Topic

Evaluation of the network protocol suite of the linux kernel with focus on performance and related impacts

Kind of work:
Diploma Thesis
Supervisor:
Dr.-Ing. Thomas Volkert
Students:
Alexander Krause
Status:
finished
Abstract:
This diploma thesis tries to cover the time behavior in the linux kernel in an empiric and
an analytic way. Furthermore, it acquires the basics for a future implementation of an alternative
to IP which has been conceptionized in the department.
In the beginning, the diploma thesis analyses the current implementation of the ISO/OSI reference
model inside the linux kernel. All required steps for a network communication and the
available programming interfaces are identified and documented. In the main focus are IPv4, TCP and ICMP. With the help of the before acquired overview of available programming interfaces for communication
purposes a software concept for evaluating the time behavior of the linux kernel during a
communication process is created. Afterwards this concept is implemented in form of linux kernel modules
and with the help of measurements on the real system interference factors for the time behavior are
identified and quantified in chosen scenarios (configuration of the linux kernel). In the following, the
results are discussed and the interference factors are compared with each other. The goal is to estimate which software components for the implementation of an alternative to IP should be placed in the user space and which of them should be implemented in the kernel space
for an optimal outcome.

Topic

Development of an environmental model supporting the passiv localization of mobiles based on signal strengths

Kind of work:
Advanced Seminar
Supervisor:
Prof. Dr.-Ing. habil. Andreas Mitschele-Thiel
Students:
Andreas Igel
Status:
finished
Abstract:

Topic

Literature research for source routing

Kind of work:
Advanced Seminar
Supervisor:
Dr.-Ing. Florian Liers
Students:
Thomas Rohe
Status:
finished
Abstract:
In addition to a classification of source routing protocols the procols Dynamic Source Routing (DSR), Secure DSR, Destination-Sequenced Distance-Vector Routing and Scalable Source Routing had been presented.

Topic

Mobility in source routing based networks

Kind of work:
Diploma Thesis
Supervisor:
Dr.-Ing. Florian Liers
Students:
Sebastian Dietzel
Status:
finished
Abstract:
Available in German only.

Topic

Entwicklung von mechanismen für einen kostenoptimierten Verbindungsaufbau in FMC-Privatnetzen

Kind of work:
Diploma Thesis
Supervisor:
Prof. Dr.-Ing. habil. Andreas Mitschele-Thiel
Students:
Hoang Nguyen Viet
Status:
finished
Abstract:

Topic

User Modelling in e-Learning Environments

Kind of work:
Diploma Thesis
Status:
finished
Abstract:

Topic

Distributed algorithms for mobility function placement in mobile communication networks

Kind of work:
Diploma Thesis
Supervisor:
Dr.-Ing. Florian Liers
Students:
Matthias Köhler
Status:
finished
Abstract:
To manage the position of mobile users, mobile networks need nodes, supporting micro‐mobility
protocols. The selection of these nodes, called anchor points, depends on the traffic and load
situation in the network. This work gives a view to some options of node oriented decisions, to find a
allocation of anchor points in a network. For that purpose, it presents some algorithms. They are
tested, compared and evaluated for different scenarios and load situations. For this, the algorithms
are viewed for the quality of their decision, their adaptability and their stability.

Topic

Modeling and analysis of a provider-based system for provision and management of very large wireless networks

Kind of work:
Diploma Thesis
Supervisor:
Dipl.-Inf. Holger Kärst
Dr.-Ing. Thomas Volkert
Students:
Martin Werner
Status:
finished
Abstract:
This diploma thesis deals with modeling and analysis of the largest puplic wlan network in germany, which is provided by the Cuculus GmbH and built in Weimar. All processes, which are triggered by an user interaction or by the system itself are analyzed and the communication relations between them are figured in appropriate UML-diagrams. Based on these communication relations and with methods of queuing networks the processes are mapped in a Simulink model, which is suitable for simulations, considering the internal dependencies in respect of usage of the service components. The real processes are analyzed in different simulation scenarios. The bounds of the analyzed system are shown, weak spots and bottlenecks are presented and based on these realization the elaboration of different improvement suggestions for performance increasing are made. The diploma thesis is completed by a direct comparison between the real processes and the system model and the closing estimation of the developed model.

Topic

Literature research Spov Net

Kind of work:
Advanced Seminar
Supervisor:
Dr.-Ing. Florian Liers
Students:
Jens Möller
Status:
finished
Abstract:

Topic

Research activities Future Internet

Kind of work:
Student research project
Supervisor:
Dr.-Ing. Florian Liers
Students:
Steven Simon
Status:
finished
Abstract:
This study deals with the activities of the future internet and illustrates the reason why new network architecture is essential. Afterwards it presents the evolutionary and revolutionary research approach. These approaches are discussed and compared on a self-developed standard of evaluation. The author closes the study with a conclusion and outlook.

Topic

Cognitive MAC Protocols in Ad Hoc Networks: Survey

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

Topic

UMTS Ressourcenoptimierung unter Berücksichtigung verschiedener Verkehrs- und Bewegungsmodelle

Kind of work:
Diploma Thesis
Supervisor:
Dr.-Ing. Florian Liers
Students:
Christian Burkhardt
Status:
finished
Abstract:
First of all, the Simulator CARMA, that was developed to compare algorithms for managing UMTS Radio Ressources at the department "Integrated Hard- and Software-Systems", is extended by a more complex traffic model. Furthermore a mobility model was integrated. The focus of the analysis is the comparison of the algorithms in different scenarios and the influences of the models.

Topic

Self-organized network monitoring for MPLS

Kind of work:
Diploma Thesis
Supervisor:
Dr.-Ing. Florian Liers
MSc. CME Nadir Zamin-Khan
Students:
Yingli Zhao
Status:
finished
Abstract:
Diese Diplomarbeit beschäftigt sich mit der Funktionsüberwachung (Monitoring) von MPLS Netzwerken. Dabei werden die Ansätze für ein selbstorganisiertes Monitoring untersucht und bewertet. Der Aufbau einer solchen Monitoringtopologie ist selbstorganisiert, d. h. er kann ohne manuelle Eingriffe und nur mit Hilfe von lokalem Wissen erfolgen. Im Überwachungssystem konzentriert sich diese Arbeit auf Monitoringdaten und die zentrale Instanz aggregiert die Daten. Beide Aspekte einer Überwachungssystems werden hinsichtlich der Auswirkungen auf die Bandbreite (die Kosten) und die Überwachungsabdeckung (den Gütewert) untersucht. Hierbei gestaltet die Überwachung mit Hilfe von MPLS-spezifischen Eigenschaften. Die Überwachung der Knoten und Kanten erfolgt entlang des LSPs. Als Schwerpunkt werden acht Platzierungsalgorithmen für die Monitore und eine für zentrale Instanz entwickelt. Mit solchen Algorithmen werden die minimale notwendige Anzahl und die möglichst optimalen Positionen der benötigten Monitore für ein gegebenes Netzwerk sowie die optimale Position der zentralen Instanz festgelegt. Zur Bewertung werden der Gütewert und die Kosten der Platzierungsalgorithmen miteinander verglichen. Dadurch wird die beste Platzierungslösung der Monitore für ein Netzwerk ausgewählt.

Topic

Possible applications of mobile communication platforms for remote engineering scenarios

Kind of work:
Advanced Seminar
Supervisor:
Dr.-Ing. Prof. h. c. Karsten Henke
Dr.-Ing. Thomas Volkert
Students:
Markus Filzhuth
Status:
finished
Abstract:

Topic

Implementation and Evaluation of Adressing Protocol (LHA) in Ad hoc Networks by means of Ns2

Kind of work:
Diploma Thesis
Supervisor:
Dr. Ausama Yousef
Dr.-Ing. Ali Diab
Students:
Philipp Drieß
Status:
finished
Abstract:

Topic

Literature research for Ad hoc networks towards seamless communications in ubiquities networks.

Kind of work:
Advanced Seminar
Supervisor:
Dr. Ausama Yousef
Dr.-Ing. Esam Alnasouri
Students:
Jana Jaqovkina
Mehdi Zegheibi
Status:
finished
Abstract:

Topic

Investigation and analyse of Nsclick simulator for the implementation of Ad hoc protocols

Kind of work:
Student research project
Supervisor:
Dr. Ausama Yousef
Students:
Yingli Zhao
Status:
finished
Abstract: