Wap ppt

WAP
Wireless Application Protocol

BY
Shivanika Prakash Dikshit

Wireless Application
Protocol

CONTENT:-
 Introduction
 Some important points about WAP
 WAP Architecture
 WAP architecture requirements
 Architecture overview
 World-wide web model
 WAP model
 WAP Gateway
 WAP browser

CONTD…
WAP Protocol stack
Components of WAP architecture
WAE
 Advantages & Disadvantages of WAP
Usage
Summary

HISTORY

The wireless industry came up with the idea
of WAP. The point of this standard was to
show internet contents on wireless clients,
like mobile phones.

WAP- 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.

ABOUT WAP………

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

GOALS-
The basic AIM of WAP is to provide a web-like
experience on small portable devices - like mobile phones
and PDAs.

PURPOSE OF WAP
To enable easy, fast delivery of relevant information
and services to mobile users.

TYPE OF DEVICES THAT USE WAP

Handheld digital wireless devices such as mobile
phones, pagers, two-way radios, smart phones and
communicators .

WAP WORKS WITH MOST WIRELESS
NETWORKS SUCH AS:
CDPD, CDMA, GSM, PDC, PHS, TDMA, FLEX,
TETRA, DECT.

OPERATING SYSTEMS THAT ARE COMPATIBLE
WITH WAP:-

WAP is a communications protocol and an application
environment.

WAP is independent of OS that means WAP can be
implemented on any OS.

It can be built on any operating system including Palm
OS, EPOC 32, Windows CE, FLEXOS, OS/9, Java OS,
etc. It provides service interoperability even between
different device families.

WAP ARCHITECTURE

Gateway Web Server

Client Encoded Request
CGI,
Request (URL)
Encoders Scripts,
WAE And Etc.
User Decoders
Agent Encoded Response
Response (Content)
Content

WORLD-WIDE WEB MODEL

Web Server

Client
Request CGI,
Scripts,
Etc.
Web
Browser
Response
(Content)
Content

WAP ARCHITECTURE
REQUIREMENTS
 Leverage existing standards whenever
possible
 Define a layered and extensible architecture
 Support as many wireless networks as
possible
 Provide support for secure applications and
communication
Optimize for efficient use of device resources

 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.

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

 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.

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.
.

WAP PROTOCOL STACK

The protocol for WAP is broken down into
different parts which is known as the
wap protocol stack..

3. WDP
4. WTP
5. WSP
6. WTLS

WAP PROTOCOL STACK

WSP

WTP

WTLS

WDP

COMPONENTS OF WAP
ARCHITECTURE

Application Layer (WAE)
Other Services
And Applications
Session Layer (WSP)

Transaction Layer (WTP)

Security Layer (WTLS)

Transport Layer (WDP)

Wireless Datagram Protocol
(WDP)
 The WAP datagram protocol (WDP) is the
Transport layer that sends and receives messages
via any available bearer network.

 It is the most bottom layer and responsible for
moving WAP data from sender to receiver & back
again.

 Provides a common interface to the upper layer
protocols and hence they function independent of
the underlying wireless network.

Wireless Session Protocol
(WSP)
 The WAP session protocol (WSP) layer
provides a lightweight session layer to
allow efficient exchange of data between
applications.

 It creates a session between the WAP
client & the WAP Gateways. Each session
has an unique id & must be started, stop,
resume or disconnected.

Wireless Transaction Protocol
(WTP)

 The WAP transaction protocol (WTP) layer
provides transaction support, adding reliability to
the datagram service provided by WDP.

 It make sure that packets sent via WDP actually
arrive at their destination by waiting
acknowledgement.

Wireless Transport Layer
Security (WTLS)

 WTLS checks the security level of data which is
sent through wireless.

 Features:
– Data integrity
– Privacy
– Authentication

WIRELESS APPLICATION
ENVIRONMENT (WAE)
 General-purpose application environment
based on a combination of WWW and mobile
telephony technologies.
 It defines the user interface on the phone. It
contains WML and WTA (Wireless
Telephony Application).
 Primary objective – interoperable
environment.
 WAE includes a micro-browser.

ADVANTAGES-

Simplicity of use.
Mobility.
Personalized.
Easy to carry.
Increased sales for devices ,infrastructure & gateway
manufacturer.
Time saving.

DISADVANTAGES
OF WAP

Battery life
Small display screens
Speed of access
Limited availability
Price
Lack of user habit
Limited memory
Limited bandwidth

USAGE/APPLICATIONS

 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.

 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

SUMMARY…..

As the bottom line, it is to be said that the use of WAP
has made the access to web very easy. The access to the
internet has become very easy when you are on the
move and the use of mobile phones have become much
more worthy.

WAP provides a markup language and a transport
protocol that open the possibilities of the wireless
environment and give players from all levels of the
industry the opportunity to access an untapped market
that is still in its infancy.

Wap ppt

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