University of Bonn
Institute of Computer Science IV
Communication and Distributed Systems
Research and Teaching
The focus of the research and advanced teaching of the group "Communication Systems" is the area of high speed communication.
The group has been working on this topic for more than ten years. Most
of the research is funded by the DFG (German national research foundation),
by the European Community and by industrial co-operation.
Classical Data communication
Most present computer networks use classic network protocols. These
protocols distinguish between the communication system on the one hand
and the application on the other hand. The application hands over data
to the transport system which delivers them at the destination (after
checking the integrity) to the application. Protocols like the
"Transmission Control Protocol" (TCP) which is used in the Internet
control the partition of the data, the examination of the received data,
the retransmission of lost or corrupted data and, if necessary, the
restoring of the order of data. An additional aim of these protocols
is to protect the network from congestion.
Up to 1996, most of our research activities dealt with classic data
communication as described above. The group designed and implemented
universally usable protocols and examined the performance of networks.
From today's view, the classical data communication protocols are still
appropriate for communication forms such as file transfer and remote login.
With the increasing importance of multimedia communication classical
protocols are revisited from a different point of view. The "Application
Level Framing" is an attempt to remove the dividing line between network
and application. In many cases, only the application can decide whether
lost or corrupted data shall be retransmitted or not. It is even possible
to adapt the coding of the transmitted data to the quality of the
We do research on the main aspects of multimedia communication in
interdisciplinary co-operation. Together with the faculty of medicine
a transport system is developed which enables multimedia access to a
digital library containing medical knowledge. This interdisciplinary
co-operation enables us to integrate communication mechanisms into the
application and to test the practical benefit of the results.
Today, networks are in the heart of many institutions. Therefore
problems have to be detected, localized and removed fastly.
Apart from this fault management, configuration management (adding,
replacing, updating of components, modification of the configuration,
...) and performance management (monitoring, bandwidth assignment,
network optimization,...) are important aspects of nearly all networks
today. In many cases, security management (access control, user
authentication) and accounting management (usage statistics, costs,...)
are very important, too.
The management of the networks of the institute of computer science is
a challenge faced by the computer support group which is part of the
Institute of Computer Science IV. This group is designing and implementing
a network management platform called "BONNVIEW", which will simplify the
operation of the networks of the institute in the future. Theory and real
life situations, research and teaching unite to form an integrated whole
with lots of tasks for our students and ideas for our research activities.
The teaching is closely related to the research activities of the group
"Communication Systems". After introductory
courses, students have the possibility to do practical work most of
which is closely related to the ongoing research activities of the group.
The students can extend their range of knowledge and their practical skills.
They can choose tasks from the areas "simulation", "design and
implementation of communication protocols", "network management"
and "network security". Some of the tasks lead students directly to
a master thesis.
Recent Research Activities
Detailed Information about recent research projects can be obtained
from the home page of the Institute of Computer science IV. Currently
the group is active in the following projects:
- Design and Implementation of communication software
- Performance analysis of networks
- Network management
- Simulation of complex systems
- Teleteaching and teleapplications
- Monitoring and characterisation of users
- Network security
University of Bonn
06.04.98 - email@example.com / 26.09.05 - firstname.lastname@example.org