Created by: Ciaran Byrne

1
WAP - An Overview
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Contents

• Introduction
• Background
• Key Elements
• Architecture

3
WAP Definition

• The Wireless Application Protocol is a de facto
  standard
• for all wireless systems, devised to address the
  specific
• needs of the wireless systems that are not met by
  existing
• Internet technologies.

4
Wheres WAP Going ?
5
Current Shortfalls
World Wide Web - aimed towards devices such as
desktop computers with High Bandwidth and where
High Latency isnt an issue.
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Three issues WAP Addresses
WAP
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Elements of WAP
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WAP Programming Model

• Builds on existing models
• Standard naming models - URLs
• Uses existing protocols - HTTP

WAP Gateway
Client
Server
WAE User Agent
WML Encoder
CGI Scripts
HTTP
WSP/ WTP
WML Script Compiler
Content
Protocol Adapters
9
XML Style Language

• Wireless Markup Language ( WML ) adheres to XML
• WML developed specifically for handheld, portable
  devices.
• WML Script similar to JavaScript

10
Microbrowser

• Used to interpret WML
• Uses Deck of Cards metaphor
• Designed specifically for handsets
• Not a web browser as we know it !!

11
WAP Stack

• Lightweight stack to minimise bandwidth
• Based on Internet stack
• Bearer independent

Wireless Application Environment (WAE)
Session Layer (WSP)
Transaction Layer (WTP)
Security Layer (WTLS)
Transport Layer (WDP)
SMS
USSD
CSD
CDMA
Etc ..
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WAP Gateway Proxy
13
LDAP Access using WAP
LDAP Server
Internet
Perl Scripts
WML Encoding
WML Deck creation
Web Server
WAP Gateway
WAP Device
14
WTA
Enables content written in WML and WML Script to
utilise telephony functions in the device and the
mobile network.
15
Push Technology

• Used to push down content to the client
• Information delivered without active input from
  user
• Standard content or WTA event

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Thank You
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Wireless Session Protocol (WSP)

• Establish a reliable connection
• Agree on common protocol functionality
• Exchange content using compact encoding
• Suspend and resume activity sessions

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Wireless Transaction Protocol

• Operates above WDP and (WTLS).
• Improved reliability over datagram services.
• Improved efficiency over connection-oriented
  services.