Mobile Systems III INFORMATIK

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as well as Mobile IP extensions in terms of hand-off optimization and paging. A quite
extensive comparison of existing protocols concludes this section.
The fifth section deals with QoS issues in the WLAN environment and outlines respective
standards available in LANs. This includes a discussion of IEEE 802.1p and IEEE 802.1Q
as well as a definition of QoS and one possible metering framework for QoS, the Real-Time
Flow Measurement (RTFM) work.
Driven by possible solutions and key security concerns in mobile networks, section six
develops a view on advanced concepts for security in those ones. The standard IEEE
802.11i addresses wireless security mechanisms, which are analyzed and advantages as
well as drawbacks are discussed. Protocol-independent security measures are included in
this section as well.
Due to the current security debate, section seven deals with intrusion detection systems,
in particular addressing mobile environments. Key functionality is described and methods
applied are discussed, while a view on wireless systems is being made.
Finally, section eight presents an overview on software environments for mobile devices.
The key role plays the Operating System (OS), and major requirements in a mobile
environment are discussed. Existing OS are presented and evaluated. Finally, J2ME is
outlined as a programming environment for mobile systems.
Seminar Operation
As usual and well established now, all interested students worked on an initially offered
set of papers and book chapters, relating to the topic titles as presented in the Table
of Content below. They prepared a written essay as a clearly focussed presentation, an
evaluation, and a summary of those topics. Each of these essays is included in this technical
report as a separate section and allows for an overview on important areas of concern,
sometimes business models in operation, and problems encountered. In addition, every
student prepared a slide presentation of approximately 45 minutes to present his findings
and summaries to the audience of students attending the seminar and other interested
students, research assistants, and professors. Following a general question and answer
phase, a student-lead discussion debated open issues and critical statements with the
audience.
Local IIS support for preparing talks, reports, and their preparation by students had
been granted Frank Eyermann, Peter Racz, Arnd Heursch, and Burkhard Stiller. A larger
number of pre-presentation discussions have provided valuable insights in the emerging
and moving field of Mobile Systems, both for students and supervisors. Many thanks to
all people contributing to the success of this event, which has happened again in a small
group of highly motivated and technically qualified students and people.
Neubiberg, May 2004