Download - Li-fi Presentation by Debika sadhukhan
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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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Main issues of wireless communication
Capacity : The range of a base station is limited.
Efficiency : Base stations consumes a lot of energy. They are only 5% efficient by records.
Availability : Radio waves are not available everywhere.
Security : Radio waves are intercepted as it penetrate through walls.
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Radio waves Visible lights
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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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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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An USB Li-fi Key designed by OLEDCOMM for tablet.
Li-Fi router for PC by OLEDCOMM, a French company.
OLEDCOMM has recently designed a Li-Fi Dongle for Smartphones.
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Li-Fi vs. Wi-Fi VLC is not in competition with WiFi, it is a
complimentary technology that should eventually 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 to provide data in a remote area where there are trees and walls and obstacles behind.
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Future Prospects This research report categorizes the
global VLC technology market; based on component, applications, and geography.
Li-Fi uses light-emitting diodes (LEDs) which are rapidly gaining in popularity for standard lightbulbs and other domestic and commercial purposes. They are expected to be ubiquitous in 20 years.
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Still under research… What will be the effect of
interferences from external light sources like sun light & normal bulbs?
what about the limited bandwith of the existing copper cables used for electrical connections ?
where do the connections uplink, how serious are the modifications needed to the power grid ?
how will other devices react if you inject a high frequency into mains ?
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