10.2.2005 T-110.456 WAP Lecture 1

Wireless ApplicationProtocol - WAP

Nie Ping & Zhou Hu

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Content

• WSP• WTP• WDP• Negative voice and Evolution• WAP future

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WAP stack

HTMLJavaScrip

HTTP

TLS-SSL

TCP/IP

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WSP

• WSP – Wireless Session Protocol– WSP is binary form of HTTP offering HTTP 1.1

functionality– Long-lived session, session suspend/resume– Optimized for low-bandwidth and long latency.– Push functions– Asychronized requests– Encoding: the number 0x87A5 (1000 0111 1010 0101)

is encoded in three octets.

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WSP

• WAP programming model

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WTP

• WTP – Wireless Transaction Protocol– Lightweight transaction protocol– Message-oriented, not stream oriented, unlike TCP– Transaction ID as Identification– Three classes of service

• Unreliable one way• Reliable one way• Reliable two way

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WDP

• WDP – Wireless Datagram Protocol• The WDP protocol operates above the data capable

bearer services supported by any available network. • Datagram transport service, a UDP like interface.• Multiplexing and Demultiplexing• Port number addressing• Segmentation and reassembly (optional)• Error detection• As a general datagram service, WDP offers a consistent

service to the upper layer protocol (Security, Transaction and Session).

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Negative voice - Mohsen Banan

• Limited distribution• Door open? entry fee $27,000• Reinvent wheels,analog with WWW, binary form,

not real invention but adoption or customization• WAP is not RFC, global open and accepted.• Interoperability: WTP’s SAR• Efficiency: mobile browsing limited experience• Alternative? LEAP: The Lightweight and Efficient

Application Protocol

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WAP future

• 3G brings more bandwidth, a relief of WAP• Wireless profiled TCP/IP. Networks speak ”IP”.• Fast growing and potential Asian market.• Advanced service: feature rich add value service.• Protect 2.5G operators’ investment

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Evolution

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Evolution

• Mobile Browsing– HTML enabled:

– XHTML enabled:

– WAP enabled: almost all

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Reference

• Interworking with TCP/IP, Douglas E.Comer• WAP Forum, OMA now. www.wapforum.org• Content Networking In The Mobile Internet, Mr.Sudhir Dixit and Mr.Tao Wu• Wap trap and LEAP, Mohsen Banan• http://electronics.howstuffworks.com/wireless-internet3.htm

http://www.nordicwirelesswatch.com/wireless/story.html?story_id=3276 http://compnetworking.about.com/od/wirelesswap/l/aa123000a.htm http://www.vbxml.com/wap/articles/wapart1.asp http://www.thefeature.com/article?articleid=12400 http://www.palowireless.com/wap/tutorials.asphttp://www.palowireless.com/wap/forums.asphttp://www.iec.org/online/tutorials/wap/topic05.html http://www.visualtron.com/wap_topic05.htm http://www.mobileinfo.com/WAP/future_outlook.htm

• http://www.ccp14.ac.uk/solution/wap/wap_trap.html

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WAP

Thank You