1. Mobile Computing Technology at Vindigo Sascha Iseli March 2003 University of Freiburg (CH)

2. Content: 1.Mobile Computing 2.PDA 3.Mobile applications 4.Vindigo 5.Design principles 6.Data compressioin 7.Vindigo Clients

3. Mobile Computing Mobile Devices: –Portable digital assistent (PDA) –Mobile Phone –Pocket PC

4. Mobile Computing Increase of mobile applications

5. Characteristics of a PDA Palm m505 –Storage:8MB –Processor:16MHz –Display:160*160 pixels –Communication:  20kB/s

6. Requirement of a mobile application Fast response times Intuitive user interface Relevant content Fast communication

7. Vindigo What is vindigo? –Navigator for a mobile computer Characteristics of vindigo –food: thousands of restaurants, delis, and coffee shops in each city –bars: great bars and clubs –shops: the nearest places to buy books, music, clothes, flowers and more –services: from ATMs to parking garages –museums: exhibitions and permanent collections –music: listings for live music shows –movies: listings for every movie now playing, plus reviews

8. Use of vindigo Select interests

9. Use of vindigo Shows restaurants

10. Use of vindigo Map

11. Use of vindigo Personal notes

12. Design principles Customized Promote Local processing Minimum communication with the Internet Economically use of the memory

13. Text compression 3.5:1 –Ideal for slow processors –Designed to work in real time Context-free Offers efficient random access

14. Three variants Fat-Client –PDA Thin Client –Mobile phone Hibrid –PDA