University of Stuttgart Institute of Parallel and Distributed High-Performance Systems (IPVR) Breitwiesenstraße D Stuttgart Seminar Mobile Computing Winter Semester 01/02 Dipl.-Inf. Uwe Kubach Prof. Dr. Kurt Rothermel

University of Stuttgart IPVR Research Group “Distributed Systems“ Contact Information Web page: Instructor: Uwe Kubach Room: Office hours: by appointment Examiner: Prof. Kurt Rothermel Room: Office hours: by appointment

University of Stuttgart IPVR Research Group “Distributed Systems“ Contents of this Talk Your presentation  Literature Research  Preparing your talk  Preparing your paper Schedule and dates Assignment of topics

University of Stuttgart IPVR Research Group “Distributed Systems“ 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.

University of Stuttgart IPVR Research Group “Distributed Systems“ 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

University of Stuttgart IPVR Research Group “Distributed Systems“ 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)

University of Stuttgart IPVR Research Group “Distributed Systems“ 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

University of Stuttgart IPVR Research Group “Distributed Systems“ 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

University of Stuttgart IPVR Research Group “Distributed Systems“ 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

University of Stuttgart IPVR Research Group “Distributed Systems“ 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

University of Stuttgart IPVR Research Group “Distributed Systems“ Giving a Talk Have a clear idea of what you are presenting Make sure everyone can see the slides, don’t obstruct the view Try to look at the audience most of the time Speak freely:  Don’t read off the slides  Don’t 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

University of Stuttgart IPVR Research Group “Distributed Systems“ 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

University of Stuttgart IPVR Research Group “Distributed Systems“ 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

University of Stuttgart IPVR Research Group “Distributed Systems“ 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!

University of Stuttgart IPVR Research Group “Distributed Systems“ 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! ( )

University of Stuttgart IPVR Research Group “Distributed Systems“ 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!

University of Stuttgart IPVR Research Group “Distributed Systems“ List of Topics 1. Conventional vs. Mobile Computing  Overview of conventional protocol stack  Problems / challenges in Mobile Computing  Mobile Computing devices 2. Wireless Local Area Networks  Problems with CSMA/CD in wireless environments  MACA  Infrared vs. RF  Standards (IrDA, IEEE , Bluetooth, HIPERLAN) 3. Mobile Network Layer  Overview of IP  Problems with IP in wireless environments  Mobile IP and Tunneling  DHCP

University of Stuttgart IPVR Research Group “Distributed Systems“ List of Topics (2) 4. Mobile Transport Layer  Overview of TCP  Problems with TCP in wireless environments  Wireless transport protocols (I-TCP, M-TCP, TCP Westwood,...) 5. 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 6. Mobile Data Management I  Caching  Replication  Asynchronous information access

University of Stuttgart IPVR Research Group “Distributed Systems“ List of Topics (3) 7. Mobile Data Management II  Broadcast dissemination  Prefetching  Hoarding 8. Mobile Ad Hoc Networks (MANETs)  Characteristics  Classification of routing algorithms for MANETs  Examples of routing algorithms for MANETs 9. Location-Aware Systems  Definition  Location systems (Active Badges, GPS, DGPS,...)  Examples of location-aware systems (GUIDE, VITs, CyberGuide,...)

University of Stuttgart IPVR Research Group “Distributed Systems“ List of Topics (3) 10. Ubiquitous Computing  Idea and vision  What's new about this paradigm? Challenges?  Devices  Examples of ubiquitous computing applications