Mobile Computing Technology at Vindigo Sascha Iseli March 2003 University of Freiburg (CH)
Content: 1.Mobile Computing 2.PDA 3.Mobile applications 4.Vindigo 5.Design principles 6.Data compressioin 7.Vindigo Clients
Mobile Computing Mobile Devices: –Portable digital assistent (PDA) –Mobile Phone –Pocket PC
Mobile Computing Increase of mobile applications
Characteristics of a PDA Palm m505 –Storage:8MB –Processor:16MHz –Display:160*160 pixels –Communication: 20kB/s
Requirement of a mobile application Fast response times Intuitive user interface Relevant content Fast communication
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
Use of vindigo Select interests
Use of vindigo Shows restaurants
Use of vindigo Map
Use of vindigo Personal notes
Design principles Customized Promote Local processing Minimum communication with the Internet Economically use of the memory
Text compression 3.5:1 –Ideal for slow processors –Designed to work in real time Context-free Offers efficient random access
Three variants Fat-Client –PDA Thin Client –Mobile phone Hibrid –PDA