Wireless Internet

1
Wireless Internet
2
Usage of Internet

• Internet will be a part of every day life says
  Bill Gates in 1994.
• In 2004, Ten years from then millions of people
  around the world use Internet including you.
• Where do we use Internet?
• To communicate with others (cell phones)
• Follow the stock market
• Keep up with the news
• Check weather
• Conduct business
• Make travel plans, shop
• Entertain yourself and learn (This list mostly
  will never end in future)

3
Beginning of Next Generation

• Staying connected has become so important that
  its hard to get away from our computer.
• With our business or our personal life growing we
  need to get a device that allows us to access the
  internet on the go.

4
Words of Next Generation Go Wireless

• Wireless Internet
• Cell phones
• PDAs
• Computers etc. many many more
• Questions that echoes
• How fast will we be able to get the information
  we need?
• How does everything works?
• What is Wireless Application protocol?

5
The Cellular Explosion

• The most important factor in the birth of
  wireless Internet
• Creation of digital cell phones
• Introduction of personal communication services
  (PCS)
• Its estimated that more then 60 million
  Web-enabled cell phones in use.
• In 1997, Nokia, Motorola, Ericsson and Phone.com
  came together to create Wireless Application
  Protocol (WAP)

6
Wireless Application Protocol (WAP)

• WAP is a universal standard to successful
  implementation of wireless Internet.
• More then 400 companies have joined in the WAP
  Forum
• WAP is designed to work on any of the existing
  wireless services, using standards such as
• Short Message Service (SMS)
• High-Speed Circuit-Switched Data (CSD)
• General Packet Radio Service (GPRS)
• Unstructured Supplementary Services Data (USSD)

7
Wireless Markup Language (WML)

• WAP uses Wireless Markup Language (WML), which
  includes the Handheld Device Markup Language
  (HDML) developed by Phone.com.
• A markup language is a way of adding information
  to your content that tells the device receiving
  the content what to do with it.
• The best known markup language is Hypertext
  Markup Language (HTML).
• WAP also allows the use of standard Internet
  protocols such as UDP, IP, and XML.

8
Wireless Application Protocol

• Here's what happens when you access a Web site
  using a WAP-enabled device
• You turn on the device and open the browser.
• 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.

9
Wireless Protocol Stack

• WAE - The Wireless Application Environment holds
  the tools that wireless Internet content
  developers use. Its functions are much like
  JavaScript.
• WSP - The Wireless Session Protocol determines
  whether a session between the device and the
  network will be connection-oriented or
  connectionless.

10
Wireless Protocol Stack

• WTP - The Wireless Transaction Protocol acts like
  a traffic cop, keeping the data flowing in a
  logical and smooth manner. The WSP and WTP layers
  correspond to Hypertext Transfer Protocol (HTTP)
  in the TCP/IP protocol suite.

11
Wireless Protocol Stack

• WTLS - Wireless Transport Layer Security provides
  many of the same security features found in the
  Transport Layer Security (TLS) part of TCP/IP. It
  checks data integrity, provides encryption and
  performs client and server authentication.

12
Wireless Protocol Stack

• WDP - The Wireless Datagram Protocol works in
  conjunction with the network carrier layer.WDP
  makes it easy to adapt WAP to a variety of
  bearers because all that needs to change is the
  information maintained at this level.

13
Wireless Protocol Stack

• Network carriers - Also called bearers, these can
  be any of the existing technologies that wireless
  providers use, as long as information is provided
  at the WDP level to interface WAP with the
  bearer.

14
Wireless Net

• Unwiring the PC will change the way people use
  computers, allowing them to communicate, be
  productive or be entertained wherever and
  whenever they want. -- Craig Barrett, Intel's
  Chief Executive Officer
• Pride of Computer Geeks Wireless Internet
  access, also known as WiFi
• Hottest technology in years.
• Catching on millions of people around the globe

15
Wireless Fidelity (WiFi)

• Does away with cables
• Broadcast Internet connections via radio waves.
• How it works
• A transmitting antenna, usually linked to a DSL
  or high-speed land-based Internet connection,
  uses radio waves to beam signals.
• Another antenna, which is in the laptop or PC,
  catches the signal.
• The signal has a range of about 300 feet for most
  home connections. The farther the user is from
  the signal, the slower the connection speed.

16
Summary

• Usage of Internet
• Cellular Explosion
• Creation of digital cells and PCS
• Emergence of WAP
• Uses of Wireless Application Protocol
• Uses of Wireless Markup Language
• Wireless Protocol Stock
• WAE, WSP, WTP, WTLS, WDP, Network carriers
• Wireless Net and Wireless Fidelity (WiFi)