Wireless application protocol ppt

Wireless Application Protocol commonly known as WAP is used to enable the acess of internet in the mobile phones or PDAs

1. www.oeclib.in Submitted By: Odisha Electronic Control Library Seminar On Wireless Application Protocol

2. Content Wireless Application Protocol WAP: Main Features WAP Architecture Requirements Architecture Overview World-Wide Web Model WAP Model Components of WAP Architecture Usage of WAP Advantages of WAP Disadvantages of WAP Conclusion

3. Wireless Application Protocol Wireless Application Protocol commonly known as WAP is used to enable the access of internet in the mobile phones or PDAs. An open, global specification that empowers mobile users with wireless devices to easily access and interact with internet information and services instantly.

4. Cont… WAP stands for Wireless Application Protocol WAP is an application communication protocol WAP is used to access services and information WAP is for handheld devices such as mobile phones WAP enables the creating of web applications for mobile devices. WAP uses the mark-up language WML (not HTML) WML is defined as an XML 1.0 application

5. WAP: Main Features Browser “Micro browser”, similar to existing web browsers Markup language Similar to HTML, adapted to mobile devices Script language Similar to Javascript , adapted to mobile devices Gateway Transition from wireless to wired world Server “ Wap /Origin server”, similar to existing web servers Protocol layers Transport layer, security layer, session layer etc. Telephony application interface Access to telephony functions

6. WAP Architecture Requirements Leverage existing standards whenever possible Define a layered, scaleable and extensible architecture Support as many wireless networks as possible Optimize for narrow-band bearers with high latency

7. Cont… Optimize for efficient use of device resources Provide support for secure applications and communication

8. Architecture Overview WWW programming model is optimized and extended to match characteristics of the wireless environment Utilizes proxy technology to connect between the wireless domain and WWW

9. World-Wide Web Model CGI, Scripts, Etc. Content Web Server Client Web Browser Request (URL) Response (Content)

10. WAP Programming Model CGI, Scripts, Etc. Content Web Server Client WAE User Agent Request (URL) Response (Content) Gateway Encoders And Decoders Encoded Request Encoded Response

11. WAP Device - Is used to access WAP applications and content. It might be a PDA, handheld computer. WAP Client - Entity that receives content from Internet via a WAP Gateway. This is usually the WAP Browser. WAP Content/Origin/Application Server - Element in the network where the information or web/WAP applications resides.

12. WAP Proxy - Acts both as a client and as a server in the network.Typically has Protocol gateway : translates requests from the WAP protocol stack to WWW protocol stack Content encoders and decoders : translate WAP content into compact encoded formats to reduce the size of data over the network It allows content and applications to be hosted on standard WWW servers and developed using proven WWW technologies such as CGI scripting

13. WAP Gateway - Intermediary element used to connect two different types of network. It receives request directly from the clients as if it actually were the origin server that clients want to receive the information form. The clients are usually unaware that they are speaking to the Gateway. WAP Browser Software running on the WAP device that interprets the WAP content arriving from the internet and decides how to display it on WAP device.

14. WML WML – Wireless Markup Language formerly called HDML (Handheld Devices Markup Language) Is a tag language that allows the text portions of Web Pages to be presented on cellular phones and Personal Digital Assistants (PDAs) via wireless access. WML is used for delivering data to WAP devices, and is HTML- like in its appearance. An alternative to WML is I-Mode’s cHTML language.

15. WAP Network Example Web Server Wireless Network WAP Proxy HTML Filter WTA Server WAP Client WML WML HTML

16. WWW Protocol Stack TCP/IP UDP/IP TLS - SSL HTTP HTML Java Script

17. Components of WAP Architecture Other Services And Applications Transport Layer (WDP) Security Layer (WTLS) Transaction Layer (WTP) Session Layer (WSP) Application Layer (WAE) GSM CDMA PHS IS-136 CDPD PDC-P FLEX Etc… Bearers :

18. U sage Corporate Applications : Sales force automation where sales people use their WAP enabled handsets to get instant, direct access to the latest pricing, latest news, competitive information any time, anywhere. Online Services : Banking: Users can get their current balance, transfer funds between accounts and receive fax of a mini-statement. Electronic Commerce: Subscribers can use their handset just like their PC to purchase products and services over the Web.

19. Cont… Tele services Prepaid Services: With a WAP-enabled phone, prepaid subscribers can see their current balance with the press of a button. By pressing another button, they can also recharge their account by entering a credit card or voucher number into the handset. Personal Productivity Email: Using WAP users can keep track of their email right from their handset. Others include: Interactive Chat Auctions Games

20. Advantages Implementation near to the Internet model; Most modern mobile telephone devices support WAP; Real-time send/receive data; Multiplatform functionality (little change is needed to run on any web site since XML is used ); No hardware obsolescence.

21. Disadvantages Low speeds, security, and very small user interface; Not very familiar to the users; Business model is expensive; Forms are hard to design; Third party is included.

22. Conclusion In conclusion, WAP is suitable for the creation of mobile learning training course material. The optimization of WAP and the handling of the design challenges makes it feasible to use mobile handheld devices for distance learning in real-time. The application developer must always be aware of the user and take into account the usability issues if the application is to be a success.

23. REFERENCES www.google.com www.wikipedia.com www.oeclib.in

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