LYU0001 Wireless-based Mobile E-Commerce on the Web Supervisor: Prof. Michael R. Lyu Prepared By: Wat Hong Fai, Tony Yan Wai Keung, Harris

Outline  Introduction  Features in our EC model  Limitation on WAP and our approach  XML + XSL for web-based application  Experience

Introduction  WAP, GPRS, UMTS(3G)  WAP specification  Phone Features Interface  Circuit Switching -> Packet Switching  I-Mode (by NTT DoCoMo)  cHTML  Packet Network

Features  End-to-End phone user interaction  Connection to make direct phone call  Animation by using WBMP format  Real time image conversion

Features (2)  User Interaction  Make response to particular products  Chat with another user  Communicate through messages  Phone Call  Integrate phone features with internet  Communicate through voice by direct phone call

Features (3)  Animation  More attractive when browsing  Black and White (.wbmp)  Image Conversion  For WAP and web to display image  Users don't need to convert images for WAP use

Limitation and our approach  User interaction  Limitation: one WAP application can be run at a time  Approach: retrieve messages when the user navigate every WAP pages  Phone Call  Limitation: occupy the phone line for data transfer when browsing WAP pages  Approach: use WTAI interface to make phone call

Limitation and our approach(2)  Animation  Limitation:.wbmp in WAP only support static B & W, uncompressed image  Approach: Estimate the actual transfer rate and use timer setting to make slide show  Image Conversion  Limitation: WAP only support.wbmp format but only few plug-ins for general public  Approach: Scripts to convert the image (JPEG, GIF) on-the-fly upon user request

Traditional E-Commerce Site  Write different set of programs for each output format  A better way is to write template to partly separate layout design from programmer

Approach with XML & XSL  XML  Represent data in an unambiguous way  Data from database will be represented as XML document  XSL  A language to transform XML data to other output formats

Approach with XML & XSL(2)  Using a single XML data and combine with an XSL can generate layout for HTML output for general internet users  Using the same XML data and combine with another XSL can generate layout for WML output for WAP devices

Approach with XML & XSL(3)  Advantage is to completely separate data processing from layout design  Newer output format in the future can be more easily generated by writing an appropriate XSL document without touching the XML data

Experience  WAP phone  Small screen (only see little thing at a time)  Black and White  More waiting time than used to be  Circuit switch vs. packet switch  Get up-to-date information (e.g. weather, stock)

Experience (2)  Development  XSL – use matching and template based working model, which is quite different from traditional programming model  This requires a different way of thinking  Analogy: writing rules for declarative programming language

Thank You