Wireless environment for data access on a server

Slide 1: UNIVERSIDADE DE VIGO Wireless environment for data access on a server Auteur: Vincent Claes Promotor (Vigo): Eng. Luís M. Álvarez Sabucedo Promotor (Vigo): Ph.D. Luís E. Anido Rifón Promotor (HL): Dr. Ing. Jan Boutsen Academiejaar: 2003 - 2004

Slide 2: Presentatie  Overzicht  Gebruikte technologieën  Ontwikkeld project  Conclusies 2

Slide 3: Universidade de Vigo 3

Slide 4: Overzicht 4

Slide 5: Gebruikte technologieën  Wireless devices  HTTP connection  Database Server 5

Slide 6: Gebruikte technologieën  Wireless devices  HTTP connection  Database Server 6

Slide 7: Wireless devices  extremely limited memory  Small screen sizes  Alternative input methods  Slow processors 7

Slide 8: Java technology  Enterprise Edition (J2EE)  Servers  Standard Edition (J2SE)  Desktops  Micro Edition (J2ME)  Small devices 8

Slide 9: J2ME  Configurations  Hardware capabilities of mobile devices  Profiles  Define the full set of API classes 9

Slide 10: J2ME - Configurations  Connected Device Configuration (CDC) 2MB of memory 32-bit microprocessor or controlller an available network connection, preferably high bandwidth  Connected Limited Device Configuration (CLDC) Minimum of 160KB total memory Minimum 16-bit 25 MHz-processor Limited user-interface facilities No (or intermittent) low-bandwidth network connection 10

Slide 11: J2ME – Profiles (CLDC)  Mobile Information Device Profile (MIDP)  today’s mobile devices  limited subset of J2SE’s feature set  custom interface and input/output classes  Personal Digital Assistant Profile (PDAP)  a superset of the MIDP  PIM,… 11

Slide 12: J2ME – MIDP 12

Slide 13: Programs used  JCreator  Wireless Toolkit 2.0 13

Slide 14: Gebruikte technologieën  Wireless devices  HTTP connection  Database Server 14

Slide 15: HTTP  Just an interface on the client  a kind of ‘browser’  Data is on the server  Connection is needed 15

Slide 16: HTTP  HyperText Transfer Protocol  HTTP transaction  request send by the client to the server  response returned from the server to the client 16

Slide 17: XML  eXtensible Markup Language is a meta- language that describes the content of the document (self describing data)  XML does not specify the tag set or grammar of the language  XML is a cross-platform ,software and hardware independent tool for transmitting information 17

Slide 18: XML 18

Slide 19: XML Parsing  Reading the data out of the tags  kXML 19

Slide 20: Gebruikte technologieën  Wireless devices  HTTP connection  Database Server 20

Slide 21: Database Server  Information was stored in a SQL database SQL= Structured Query Language  ASP (Active Server Pages) Used to generate the XML files aspx – VB.NET 21

Slide 22: Final overview 22

Slide 23: Developed Project 23

Slide 24: Conclusions  J2ME will be the dominant platform for mobile devices  450 million handsets (2007)  Data processing on the server side  Limitations of the devices 24

Slide 25: Resources  IBM developerworks http://www.ibm.com/developerworks/  Nokia Forum http://www.forum.nokia.com  Sun Website http://www.sun.com 25

Slide 26: Bedankt voor uw aandacht. Vragen ? 26

Slide 27: --== The End ==-- 27