This is a presentation about Li-Fi Technology type of VLC communication researched by Dr. Haralld Haas University of Edinburgh, Germany (2003-2011). Recently used in some western countries , we hope to be deployed in Arab World. I introduced this presentation in details at class of Technical English Writing, it was venerable great.

1. Submitted for:
Dr. Mosbah Shaat.
By:
Mahmoud Abuzayed 120101874

2. INTRODUCTION TO LI-FI
WIRELESS COMMUNICATION
THROUGH LIGHT ILLUMINATION
A HISTORICAL REVIEW

3. PRESENT WIRELESS
COMMUNICATION
• Radio spectrum
• 1.4 Million base stations, 5 billion Mobile stations
• 600TB data every month

4. WIRELESS COMMUNICATION, A
UTILITY
•Personal life
•Business life
•Hospitals
•Research and development
•Security

5. ISSUES REGARDING RADIO
SPECTRUM

6. CAPACITY
• We Transmit data using Radio waves.
• Cost and Expensive.
• Less Bandwidth compared to other spectrums.
• Insufficient spectrum for increasing data.
Efficiency
• Millions of base stations consume huge amount of
energy for
1.Transmitting the radio waves.
2.To cool the base station cabins.
• 5% Efficiency.

7. AVAILABILITY
• Available within the range of Base stations.
• Limited availability.
• Unavailable in aircrafts.
Security
• Less secure(passes through the walls)

8. Is not used
generally
Used
for
hospital
s
Dangerou
s for
human
body
Expensive,
Limited
BW
Less
Secure Which is not used so far
Safe to use
Larger bandwidth
Low power
Application
s

9. HOW LI-FI?
• Normal light power is replaced by LED light power
• The LED bulb will hold a micro-chip that will do the job of
processing the data.
• The light intensity can be manipulated to send data by tiny
changes in amplitude
• Properties of LED: (Fundamental property of LI-FI)
1.Intensity can be modulated into very high speeds
and varying amplitudes
2.LED can be switched on and off with very high
speed

10. INFRARED RAYS IN REMOTE
CONTROL
•Single data stream
•10,000 or 20,000 bits per second
•Not usable for video streaming
LI-FI

11. LI-FI
•Light power(LED)
•Multiple data stream
•High speed
•Technologies used in LI-FI: SIM-OFDM and Spatial
modulation

12. Advantages
• Larger bandwidth (10,000 times the radio
bandwidth)
• High efficiency
• More availability
• Highly secure

13. 1. IN RF RESTRICTED
ENVIRONMENTS
APPLICATION
S

14. 2. HOSPITALS(IN FEW MEDICAL
INSTRUMENTS)

15. 3. IN VEHICLES AND TRAFFIC
LIGHTS, REDUCING ACCIDENTS
AND TRAFFIC CONGESTION

16. 4. STREET LAMPS(AS FREE
ACCESS POINTS)

17. 5. IN AIRCRAFT CABINS

18. LI-FI AND WI-FI
Appearance of the Li-Fi cannot wipe off
the need of Wi-Fi.
Li-Fi is a complementary.