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Li-Fi Technology

A faster & brighter

light fidelity....

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Walkthrough Origin of the Concept

Introduction of Li-Fi

Genesis

Implementation

Economic value of Li-Fi

Some hotspots

Wi-Fi vs. Li-Fi Future prospects

Still under research

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1.4 millionbase stations

5 billionwireless

communicativedevice

600 terabytesof data transmissionper month

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Main issues of wireless communication

Capacity : The range of a base station islimited.

Efficiency : Base stations consumes a lot of

energy. They are only 5% efficient byrecords.

Availability : Radio waves are not availableeverywhere.

Security : Radio waves are intercepted as itpenetrate through walls.

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Radio waves

Visible lights

3 KHz - 300 GHz 430790 THz

frequency

x 10,000

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LED light bulb

Light Emitting Diodes as a source of

light (releases large amount of

energy in the form of light)

Semiconductor material (intensity

can be motivated at a very high

speed & can be switched off at very

high speed)

Long service life (10-15 years while

usual bulbs lasts 1-2 years)

Energy-saving (8W LED bulb

= 60W ordinary light bulb)

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Prof. Harald Haas

Edinburgh, Germany

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Economic value

A free band that does not need license. High installation cost but very low

maintenance cost. Cheaper than Wi-Fi.Theoretical speed up to 1 GB per second :

Less time & energy consumption. No more monthly broadband bills. Lower electricity costs. Longevity of LED bulb : saves money. Light doesn't penetrate through walls :

secured access.

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seminar hallpetrochemical planthospitalsunder the ocean

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street lights& trafic signalsair craft cabins

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An USB Li-fi Keydesigned by

OLEDCOMM for tablet.

Li-Fi router for PC by

OLEDCOMM, a Frenchcompany.

OLEDCOMM hasrecently designed a Li-FiDongle for Smartphones.

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Li-Fi vs. Wi-Fi

VLC is not in competition with WiFi, it is acomplimentary technology that shouldeventually help free up much needed

space within the radio wave spectrum.You can't have a light bulb that provides

data to a high-speed moving object or toprovide data in a remote area wherethere are trees and walls and obstaclesbehind.

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Future Prospects

This research report categorizes theglobal VLC technology market; based oncomponent, applications, and geography.

Li-Fi uses light-emitting diodes (LEDs)which are rapidly gaining in popularityfor standard lightbulbs and otherdomestic and commercial purposes.

They are expected to be ubiquitous in 20years.

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Still under research What will be the effect of

interferences from externallight sources like sun light &normal bulbs?

what about the limitedbandwith of the existingcopper cables used forelectrical connections ?

where do the connectionsuplink, how serious are themodifications needed to the

power grid ? how will other devices react if

you inject a high frequencyinto mains ?

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