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

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.

Radio waves Visible lights

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)

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.

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.

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.

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.

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 ?