li-fi is a technology that uses the light emitting diodes to transmit the data wirelessly.

1. Name: Abdelrahman Alaa
Mostafa
Subbmitted to Ms. passant

2. • li-fi is a technology that uses the light
emitting diodes to transmit the data
wirelessly.

3. • The technology truly began during the 1990's in
countries like Germany, Korea, and Japan where
they discovered LED's could be retrofitted to
send information. Harald Haas continues to wow
the world with the potential to use light for
communication .

4. • The working process is very simple, if the led is on, you
transmit a digital 1, if its off you transmit a 0. The LEDs
can be switched on and off very quickly, which gives nice
opportunities for transmitting data. Hence all that us
required is some LEDS and a controller that code data
into those LEDs. We have to just vary the rate at which
the LED’s
• Thus every light source will works as a hub for data
transmission

7. • Larger bandwidth ( 10,000 times the radio bandwidth ).
• High speed data rate .
• High efficiency .
• Highly secure.
• Works even under water in sea.
• Safe for health .
• More availability.
• Low cost solution.

8. • Traffic lights:
• where Traffic lights can communicate to the car and with
each other. Cars have LED-based headlights, LED-based
cack lights, and cars can communicate with each other
and prevent accidents in by exchanging information.

9. • Visible Light is more safe than RF, hence it can be used
in places where RF can't be used such as petrochemical
plants .

10. • Whenever we travel through airways we face the
problem in communication media ,because the whole
airways communication are performed on the basis of
radio waves. To overcome this drawback on radiowaves
, li-fi is introduced

11. • Li-Fi can even wok underwater were Wi-Fi fails
completely, thereby throwing open endless opportunities
for military/navigation operations.

12. • There are millions of street lamps deployed around the
world.
• Each of these street lamps could be a free access point.

13. •Presence of light is essential.
•There should be line of sight
•Works better with fluorescent
light and LEDs but very low
efficiency with Bulbs.

14. • Yes, this is already proven.
• Dr. Harald Hass demonstrated his invention
using an ordinary table lamp that successfully
transmitted data at speeds exceeding 10Mbps
.
• To prove that the light bulb was the source of
data stream, he periodically blocked the beam
of light, causing the connection to drop.

15. • The possibilities are numerous and can be explored
further. If this technology can be put into practical use,
every bulb can be used something like Wi-Fi hotspot to
transmit wireless data and we will proceed onwards the
Cleaner, Greener, Safer and Brighter future.

16. • http://en.wikipedia.org/wiki/Li-Fi
• http://www.bbc.com/news/technology-24711935
• http://www.extremetech.com/computing/152740-
researchers-create-3gbps-lifi-network-with-led-bulbs
• http://www.ijircce.com/upload/2013/october/8LiFi.pdf
• http://www.inteligentcomp.com/2013/03/wireless-data-
from-LED-bulbs.html
• http://www.theregister.co.uk/2012/05/24/wtf_is_lifi_visible
_light_communications?page=1
• http://renergytestblog2.blogspot.com/2013/05/internet-
access-through-led-bulb-li-fi.html
• http://visual.ly/li-fi-how-does-it-work