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

Outline  Introduction  Traditional web access vs mobile access  Protocol : WAP  WAP architecture, limitation and future  E-Commerce Model  Our Future work  XML, XSL

Web Access vs Mobile Access  Web vs WAP  Different protocols to be used  HTML for standard web browser (IE/Netscape)  WML for small narrowband device (mobile phone/PDAs)  WML is not as visually rich as HTML.

WAP  WAP – Wireless Application Protocol  Based on already existing Internet protocols, but are optimized for mobile users with wireless devices  Specification for developing applications over wireless communication networks  Translating internet information to display on the screen of mobile phones or other portable device.  mobile phone from which you can surf the web, but it is not all the case

WAP Architecture(1)  A web server can host the WAP  A WAP Gateway is an intermediary between the Internet and the mobile network.  translates mobile device requests (WAP requests) into HTTP requests, redirects the web-server's HTTP responses to the mobile  An Emulator downloads a WML file directly from a web-server

WAP Architecture(2)

WML  WML – Wireless Markup Language  Specific type of XML (eXtensible Markup Language)  Standardized Document Type Definition (DTD) by W3C  Functional Areas: 1. Text presentation and layout 2. Deck/card organizational metaphor, 3. Inter-card navigation and linking 4. String parameterization and state management (WML variables) 5. Interface to phone features

WAP Limitation  Designed with constraints: 1. Small display and limited input facilities 2. Narrowband network connection 3. Limited memory and computational resources  Narrow bandwidth: 9.6kbps  Maximum size of each deck: 1.4 Kbytes  Recently, only text and monochrome images (.wbmp) are supported GIF format on web WBMP format on WAP

WAP Future  Recently, WAP(version 1.2) is based on GSM, CDMA or TDMA networks (2G)  Later on, gateway can get the user’s information, such as phone number and current location.  GPRS (General Packet Radio Service) is a mobile telephony network system that uses packet switched data transmission (2.5G).  It provide faster speed (max. 172kbps) and better application can be developed. Eg. Multimedia applications and remote LAN access  When 3G is available in the market, it will make video conferencing possible

E-Commerce Model  Our objective is to practise real life e-commerce with security and payment issues  Design and Develop a WAP-based E-Commerce application on the Web  A Second hand market application is to be built for real-time interaction, purchasing and transaction with payment  Accessible with WAP-enabled device such as mobile phone and PDAs

Facilities of the Model(1)  Posting products for sale or to request for  Secure payment method by Visa/Master card, Mondex  Real-time buyer-seller interaction including chatting to bargain for the price  Real-time purchasing and make transaction

Facilities of the Model(2)  Session propagation for convenient and secure operations  Provide pictures for web and wap users  Store user transaction history and personal profile

Future work(1)  Implement the online market in both web and WAP versions  Customize and personalize the UI of WAP browser to meet complex e-commerce model  Use of XML to manipulate the raw data to make it generic for future development on WAP technology  Use of XSL for transformation from a XML document to HTML or WML depends on users’ request

Future Work(2)

Introduction to XML and XSL  XML (eXtensible Markup Language) - a meta language used to define other domain- or industry-specific languages - Creating markup languages that describe data - Human readable format - targeted to different devices using XSL - No fixed set of elements - a specific Document Type Definition (DTD) is needed to provide the rules that define the elements and structure

Introduction to XSL  XSL (eXtensible Stylesheet Language) - is XML - a language for transforming XML documents [XSLT] - an XML vocabulary for specifying formatting semantics [XSL FO (formatting objects)] - A description of how to present the transformed information - a syntax for addressing parts of a document [XPath]

Advantages of XML and XSL(1)  Use of XML to increase the flexibility on manipulating the raw data  Reuse of fragments of data  multiple output formats

Advantages of XML and XSL(2)  styles tailored to the reader's preference (e.g., accessibility)  standardized styles  freedom from style issues for content authors

The End Thank You!