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Wireless Application Protocol (WAP)

Wireless Application Protocol (WAP). Reference: Chapter 12, section 2, Wireless Communications and Networks , by William Stallings, Prentice Hall. Introduction. WAP is designed to work with all wireless network technologies (GSM, CDMA, TDMA) WAP Specification

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Wireless Application Protocol (WAP)

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  1. Wireless Application Protocol (WAP) Reference: Chapter 12, section 2, Wireless Communications and Networks, by William Stallings, Prentice Hall

  2. Introduction • WAP is designed to work with all wireless network technologies (GSM, CDMA, TDMA) • WAP Specification • A programming model based on the WWW Programming Model • A markup language, the Wireless Markup Language, adhering to XML • A specification of a small browser suitable for a mobile, wireless terminal • A lightweight communications protocol stack • A framework for wireless telephony applications (WTAs)

  3. Architectural Overview

  4. WAP Programming Model

  5. WAP Infrastructure

  6. WAP Design Considerations • Limitations of the mobile node • Small screen size • Limited input capability • Limited processors, memory, and battery life • Wireless networks • Relatively low bandwidth • High latency • Unpredictable availability and stability compared to wired connections

  7. WAP Related Protocols • Wireless Markup Language (WML) • Designed to describe content and format for presenting data on devices with limited bandwidth, limited screen size, and limited user input capability • Mainly text-based information that attempts to capture the essence of the Web page and that is organized for easy access for users of mobile devices

  8. WAP Related Protocols (cont) • WMLScript • A scripting language with similarities to JavaScript • Designed for defining script-type programs in a user device with limited processing power and memory • Wireless Application Environment • Specifies an application framework for wireless devices such as mobile telephones, pagers, and PDAs

  9. WAE Client Components

  10. WAP Related Protocols (cont) • Wireless Session Protocol (WSP) • WSP is a transaction-oriented protocol based on the concept of a request and a reply • WSP also defines a server Push operation, in which the server sends unrequested content to a client device (e.g. broadcast messages) • Wireless Transaction Protocol (WTP) • WTP provides a reliable transport service but dispenses with much of the overhead of TCP

  11. WAP Related Protocols (cont) • Wireless Transport Layer Security (WTLS) • WTLS provides security services between the mobile device (client) and the WAP gateway • WTLS is based on the industry-standard Transport Layer Security (TLS) Protocol, which is a refinement of the secure sockets layer (SSL) • TLS is the standard security protocol used between Web browsers and Web servers • WTLS is more efficient than TLS, requiring fewer message exchanges

  12. WAP Related Protocols (cont) • Wireless Datagram Protocol (WDP) • WDP is used to adapt a higher-layer WAP protocol to the communication mechanism used between the mobile node and the WAP gateway

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