Seminar Mobile Computing Winter Semester 01/02

1
SeminarMobile ComputingWinter Semester 01/02

• Dipl.-Inf. Uwe Kubach
• Prof. Dr. Kurt Rothermel

2
Contact Information

• Web page
• http//www.informatik.uni-stuttgart.de/ipvr/vs/le
  hre/ws0102/seminare/MC/index.html
• Instructor
• Uwe Kubach
• Email Uwe.Kubach_at_informatik.uni-stuttgart.deRoo
  m 0.179Office hours by appointment
• Examiner
• Prof. Kurt Rothermel
• Email Kurt.Rothermel_at_informatik.uni-stuttgart.de
  Room 2.006Office hours by appointment

3
Contents of this Talk

• Your presentation
• Literature Research
• Preparing your talk
• Preparing your paper
• Schedule and dates
• Assignment of topics

4
Preparing your Presentation

• General
• Research the literature for relevant articles and
  extract the information pertinent to your
  assigned topic.
• Do not lose focus of the overall topic of the
  seminar and your assigned topic.
• Prepare a talk on the topic you have examined.
• Prepare a paper summarizing the results of your
  work.

5
Literature Research

• Starting points
• Topic description
• (possibly) own information
• Check the library for
• Books
• Proceedings
• Magazines and transactions
• References in topic description are only hints.
• Web-based research
• most current information (authors web pages)
• Information from manufacturers and organizations
• scientific articles (e.g. ResearchIndex under
  citeseer.nj.nec.com/cs)
• Generic search engines (e.g. Google under
  www.google.com)

6
Presentations

• Presence at all presentations is mandatory for
  all participants.
• You are expected to participate actively in the
  discussions.
• Time
• 30 minutes presentation time
• longer talks (up to 45 minutes) possible after
  announcement.
• about 15 minutes discussion
• Presentation media
• Slides and overhead projector
• Electronic presentation (caution more work)

7
Preparing Your Presentation

• Collect and read material
• Understand the goal of the presentation and your
  target audience
• What do you want them to learn?
• What does your audience already know?
• What are the core contents of your presentation?
• What kind of presentation will you give (overview
  talk, detailed technical presentation, discussion
  of research directions, )
• Possibly Do you need to prepare additional
  material (handouts, )?
• Calculate the time needed for your presentation
• 2-3 minutes per slide

8
Structuring your Presentation

• Decide on the contents of your talk
• You will not have time to cover every detail
  Decide which parts of the information are
  important
• Structure the contents
• like in a book
• in logical, historical or functional order
• Estimate time needed to cover each subtopic
• Estimate number of slides per subtopic

9
How to Organize a Presentation

• Structure
• Cover slide
• Overview of the contents (repeat during
  presentation if giving a long talk)
• Main part organized into subtopics
• Summary
• Outlook
• Pay attention to the transitions between the
  subtopics
• Practice the talk, e.g. in front of a friend

10
Slide Design Guidelines

• Use landscape format
• Use a sans-serif font of sufficient size (e.g.
  20pt Arial)
• Use the same layout throughout your presentation
• Do not overload the slide 7-9 points per slide
  will do
• Avoid complete sentences
• Use graphics to enrich your presentation

11
Giving a Talk

• Have a clear idea of what you are presenting
• Make sure everyone can see the slides, dont
  obstruct the view
• Try to look at the audience most of the time
• Speak freely
• Dont read off the slides
• Dont memorize the talk exactly
• Stay close to the topic you are presenting
• Be prepared to skip slides if you run out of time
• Avoid long discussions with the audience - there
  is time for discussions after the talk

12
Electronic Presentations

• Advantages
• Less expensive (no slides)
• Might be more impressive
• Dynamics of a situation can be visualized
  (animations)
• Color can be used more easily

• Disadvantages
• More work, additional effort to set up equipment
• Technical failures possible
• (Potentially) harder to re-use material for your
  paper

13
Paper

• Formally, your paper should have the following
  contents
• Your name and semester
• Date of your talk
• Title of the seminar
• Name of the topic you have prepared
• Abstract of your paper
• Introduction (including the contents of the
  paper)
• Main part
• Summary and outlook
• Bibliography

14
Paper (2)

• Make sure that readers of your paper can
  understand it without further information
• Give special attention to the structure
• Make sure the reader can follow the thread of
  your arguments
• The paper should be
• 10-15 pages long
• written in a 12pt font, single-spaced
• Important Stay objective!

15
Schedule

• Today Assignment of topics
• Four weeks before your talk Q A (optional)
• One week before your talk mandatory meeting
• Draft version of presentation slides
• Draft version of paper
• Date of talk
• Final version of paper (printed electronically)
• Final version of your slides (printed
  electronically)
• Make appointments for meetings early! (e-mail)

16
Cheating

• Everyone who cheats fails.
• Copying text from other authors in your paper /
  slides is not allowed!
• Copying ideas without referencing the authors is
  not allowed!
• You have to write all parts of your paper /
  slides on your own!

17
List of Topics

• Conventional vs. Mobile Computing
• Overview of conventional protocol stack
• Problems / challenges in Mobile Computing
• Mobile Computing devices
• Wireless Local Area Networks
• Problems with CSMA/CD in wireless environments
• MACA
• Infrared vs. RF
• Standards (IrDA, IEEE 802.11, Bluetooth,
  HIPERLAN)
• Mobile Network Layer
• Overview of IP
• Problems with IP in wireless environments
• Mobile IP and Tunneling
• DHCP

18
List of Topics (2)

• Mobile Transport Layer
• Overview of TCP
• Problems with TCP in wireless environments
• Wireless transport protocols (I-TCP, M-TCP, TCP
  Westwood, ...)
• Wireless Telecommunication Systems
• Packet switched vs. Circuit switched networks.
• Architecture of current and future
  telecommunication systems (GSM, HSCSD, GPRS,
  EDGE, UMTS)
• Data rates and costs
• Mobile Data Management I
• Caching
• Replication
• Asynchronous information access

19
List of Topics (3)

• Mobile Data Management II
• Broadcast dissemination
• Prefetching
• Hoarding
• Mobile Ad Hoc Networks (MANETs)
• Characteristics
• Classification of routing algorithms for MANETs
• Examples of routing algorithms for MANETs
• Location-Aware Systems
• Definition
• Location systems (Active Badges, GPS, DGPS, ...)
• Examples of location-aware systems (GUIDE, VITs,
  CyberGuide, ...)

20
List of Topics (3)

• Ubiquitous Computing
• Idea and vision
• What's new about this paradigm? Challenges?
• Devices
• Examples of ubiquitous computing applications