This document provides an overview of various wireless technologies including Wi-Fi, WiMAX, Gi-Fi, and Li-Fi. It discusses the standards, speeds, ranges and other characteristics of each technology. It notes that Wi-Fi uses radio frequencies for wireless internet access at speeds up to 54 Mbps within a 100m range, while WiMAX can transmit data up to 30 miles at speeds over 75 Mbps. Gi-Fi allows wireless transfer at 5 gigabits per second within 10 meters, and Li-Fi uses light communication through LEDs to transmit data through visible light at speeds over 1 gigabit per second.

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*

2. 2
CONTENTS
* Introduction
* WI-FI
* WIMAX
* GI-FI
* LI-FI
* Conclusion
Live Wireless Demonstration

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*
*Short for wireless fidelity.
*It is a wireless technology that uses radio frequency to
transmit data through the air.
* Wi-Fi is based on the 802.11 standard
*802.11a
*802.11b
*802.11g

4. 4
*
*IEEE (Institute of Electrical and Electronics
Engineers) established the 802.11 Group in 1990.
Specifications for standard ratified in 1997.
*Initial speeds were 1 and 2 Mbps.
*IEEE modified the standard in 1999 to include:
*802.11b
*802.11a
*802.11g was added in 2003.
*IEEE Created standard, but Wi-Fi Alliance certifies
products

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*
*The Wi-Fi CERTIFIED logo from the Wi-Fi Alliance.
*Rigorous interoperability testing requirements.
*Certifies the interoperability of 802.11 products from the
many different vendors.

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*
*Freedom – You can work from any location that you can
get a signal.
*Setup Cost – No cabling required.
*Flexibility – Quick and easy to setup in temp or permanent
space.
*Scaleable – Can be expanded with growth.
*Mobile Access – Can access the network on the move.

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*
*Speed – Slower than cable.
*Range – Affected by various medium.
*Travels best through open space.
*Reduced by walls, glass, water, etc
*Security – Greater exposure to risks.
*Unauthorized access.
*Compromising data.
*Denial of service.

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*
Standard Speed Freq band Notes
*802.11 2 Mbps 2.4 GHz (1997)
*802.11a 54 Mbps 5 GHz (1999)
*802.11g 54 Mbps 2.4 GHz
*802.11n 600 Mbps 2.4/5 GHz
*
*Wired Equivalency Protocol (WEP)
*Wi-Fi Protected Access (WPA)
*Wi-Fi Protected Access 2 (WPA2)
*Extended EAP(Extensible Authentication Protocol)

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*
To Wired NetworkOR

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*
*WiMax is a radio technology that promises to deliver
two-way Internet access at speeds of up to 75 Mbps
at long range.
*Its backers claim that WiMax can transmit data up
to 30 miles between broadcast towers and can
blanket areas more than a mile in radius with
bandwidth that exceeds current DSL and cable
broadband capabilities.
*So, some believe that it could slash the cost of
bringing broadband to remote areas.

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*
IEEE 802.11 IEEE 802.16a
Max Speed 54Mbps (a&g) 10-100Mbps
Range 100m 40 km
QoS none yes
Coverage Indoor Outdoor
Users Hundred Thousand
Service Level None Yes

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*
*Short For or Gigabit Wireless.
*Gi-fi is the world's first transceiver integrated on a single
chip that operates at 60GHz on the CMOS process.
* Gi-Fi allows wireless transfer of audio and video data
up to 5 gigabits per second
*Gi-Fi is ten times the current maximum wireless transfer
rate usually within a range of 10 meters.

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*
Cables Optical Fiber
Wireless Access
Bluetooth
Wi-Fi
Wimax
Gi-Fi

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*
*High speed of data transfer.
*Low power consumption
*High Security
*Cost Effective
*Small size
*Quick Deployment
*Highly portable,High Mobility

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*
*
*Short for Light fidelity.
*At the heart of this technology is a new generation of
high brightness light emitting diodes.
*It is possible to encode data in the light by varying the
rate at which the LED’s flicker on and off to give
different strings 1s and 0s.
*Li-Fi is a term, one used to describe visible light
communication technology applied to high speed
wireless communication.

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*
*
LED
Image Sensor

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*
**Green information technology
*Lighting points Used as Hotspots
*Can be used in hospitals and even underwater
*
*
*Li-Fi doesn’t work in the dark or outdoors.
*Li-Fi has a big drawback compared to Wi-Fi, unlike wi-
Fi we cannot move to other rooms unless there are wired
bulbs too.

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*
*Wi-Fi gives us the point-to-multiple point internet
facility, by which we can create the Wi-Fi hotspot zone
anywhere.
*Wi-Max completely revaluated the business world for
the faster internet facility.
*Gi-Fi follows the tradition of Li-Fi. More and more
research should be done in the field of these new
wireless technology and its applications.
*Now according to the demand of consumers we
introduced the Li-Fi technology for more than 1 Gbps
speed.

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*
*ISTP Journal of Research in Electrical and Electronics
Engineering (ISTP-JREEE)
*Wikipedia -> http://en.m.wikipedia.org?wiki?wireless
*www.cisco.com/wireless_networking
*http://www.slideshare.net/accessallow/lifi technology
*http://www.slideshare.net/tapeshchalisgaonkar1/gi-fi-
technology-finl-ppt

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*Now,
Wireless Live
Demonstration

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*THANK
YOU
YR