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WAP TECHNOLOGY by nitin govindan

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Title: WAP TECHNOLOGY by nitin govindan


1
Introduction to WAP
  • by
  • Nitin Govindan

2
Contents
  • WAP Introduction
  • WAP architecture requirements
  • Architecture overview
  • Components of WAP architecture
  • Sample Configuration of WAP technology
  • Usage, Advantages Disadvantages of WAP
  • Summary

3
What is WAP ?
  • An open, global specification that empowers
    mobile users with wireless devices to easily
    access and interact with internet information and
    services instantly.
  • 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

4
History of WAP
  • WAP is a global standard and not controlled by
    any single company, Ericsson, Nokia ,Motorola and
    unwired planet founded the WAP forum in the
    summer of June 26, 1997 with the initial purpose
    of defining an industry-wide specification for
    developing application over wireless
    communication networks

5
More points on wap
  • WAP stands for Wireless Application Protocol
  • WAP is an application communication protocol
  • WAP is used to access services and information
  • WAP is inherited from Internet standards
  • WAP is for handheld devices such as mobile phones
  • WAP is a protocol designed for micro browsers
  • 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

6
Popular WAP gadgets
7
This is how Internet works
8
WAP Architecture
9
WAP application server
WAP Application Server
Application Logic
WSP/WTP
WML Decks with WML-Script
10
This how you access internet via WAP
  • You turn on the device and open the minibrowser
  • The device sends out a radio signal, searching
    for service.
  • A connection is made with your service provider.
  • You select a Web site that you wish to view.
  • A request is sent to a gateway server using WAP.
  • The gateway server retrieves the information via
    HTTP from the Web site.
  • The gateway server encodes the HTTP data as WML.
  • The WML-encoded data is sent to your device.
  • You see the wireless Internet version of the Web
    page you selected.

11
And this is how a normal internet window view
look with WAP
12
WAP protocol stack
13
Wireless Application Environment
  • General Purpose Application Environment based
    on combination of WWW and Mobile Telephony
    Technologies.
  • Wireless Markup Language (WML), WMLScript.

14
Wireless Session Protocol (WSP)
  • Opens a session of communication between client
    and server.
  • Establishes protocol and negotiations
  • Exchanges encoded data
  • Exchanges requests and replies
  • Supports asynchronous transmission of data.

15
Wireless Transaction Protocol (WTP)
  • Deals with transaction and retransmission of
    data, separation and concatenation of data.
  • Has a separate interface to manage WTP layer and
    settings of handheld device.

16
Wireless Transport Layer Security (WTLS)
  • Security Protocol
  • Used for secure communication between terminals
  • Provides the following
  • Data Integrity
  • Privacy
  • Authentication
  • Denial-of-service protection

17
Wireless Datagram Protocol (WDP)
  • Transport Layer Protocol.
  • Offers consistent service and common interface to
    upper layers of protocols.
  • Enhances communication between Bearer Services
    and upper level protocols.

18
Bearers
  • Products that implement WAP in their network and
    technology.
  • Eg CDPD, Mobitex, GSM

19
WAP Network
20
WAP terms
  • 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.

21
Contd.
  • 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.

22
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-Modes cHTML language.

23
Difference between WAP/WML HTML
24
HTML vs. HDML vs. WML
  • Hyper Text Markup Language (HTML) is the language
    that is used to translate data to a web browser
    to be viewed by a user.
  • Handheld Device Markup Language (HDML) is used
    to incorporate handheld or portable device
    applications such as a micro browser.
  • Wireless Markup Language (WML) is a language
    derived from HTML that is used with WAP to
    incorporate WAP features.

25
WML Example
WMLgt ltCARDgt ltDO TYPEACCEPTgt ltGO
URLeCard/gt lt/DO Welcome! lt/CARDgt
ltCARD NAMEeCardgt ltDO TYPEACCEPTgt
ltGO URL/submit?N(N)S(S)/gt lt/DOgt
Enter name ltINPUT KEYN/gt Choose speed
ltSELECT KEYSgt ltOPTION
VALUE0gtFastlt/OPTIONgt ltOPTION
VALUE1gtSlowlt/OPTIONgt ltSELECTgt
lt/CARDgt lt/WMLgt
26
Usage of WAP
  • - 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.

27
Contd.
  • 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

28
Advantages of WAP
  • open standard, vendor independent
  • network-standard independent
  • transport mechanismoptimized for wireless data
    bearers
  • application downloaded from the server, enabling
    fast service creation and introduction, as
    opposed to embedded software

29
Disadvantages
  • Speed of access All devices have slow access.
  • Limited or fragmented availability Wireless web
    access is sporadic in many areas and entirely
    unavailable in other areas.
  • Price Many technology limitations are being
    addressed by higher-end devices and services. But
    the entry price for a good wireless web palmtop
    with decent display, keyboard, and speed is
    easily 700 to 900, not including monthly
    access.
  • Lack of user habit It takes some patience and
    overcoming the learning curve to get the hang of
    it -- connecting, putting in an address, typing.
    Users just aren't used to the idea and protocol
    yet.
  • Small screens For web phones, there's an
    incredibly small viewing area palmtops are
    barely better

30
Summary
  • 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.
  • The bearer-independent nature of WAP has proved
    to be a long-awaited breath of fresh air for an
    industry riddled with multiple proprietary
    standards that have suffocated the advent of a
    new wave of mobile-Internet communications. WAP
    is an enabling technology that, through gateway
    infrastructure deployed in mobile operator's
    network, will bridge the gap between the mobile
    world and the Internet, bringing sophisticated
    solutions to mobile users, independent of the
    bearer and network.
  • Backed by 75 percent of the companies behind the
    world's mobile telephone market and the huge
    development potential of WAP, the future for WAP
    looks bright.

31
Refrences
  • about.com http//compnetworking.about.com/od/wirel
    esswap/l/aa123000a.htm
  • howstuffworks.com http//www.howstuffworks.com/sea
    rch.php?termswap
  • wikipedia.org http//en.wikipedia.org/wiki/Wireles
    s_Application_Protocol
  • w3schools.com http//www.w3schools.com/wa
    p/wap_intro.asp

32
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