Post on 14-Apr-2018
transcript
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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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