This presentation was made by me and my team for the humanities department of my college.

1. LIGHT FIDELITY (Li-
Fi)
PRESENTED BY:
SHIVENDU KUMAR (12000116044)
SHIVAM KUMAR (12000116045)
ROHIT RAJ (12000116059)
ROHIT KUMAR (12000116060)
ROHAN VIVEK (12000116061)
RITIK KUMAR (12000116063)
RAVISHANKAR JHA (12000116066)
CSE-1(Y), 2nd Yr, 4th Sem/Li-Fi/06.04.2018

2. SLIDE PLAN
INTRODUCTION
ARCHITECTURE
HOW Li-Fi WORKS?
FEATURES AND BENEFITS
Li-Fi VS Wi-Fi
DISADVANTAGES
APPLICATIONS
FUTURE POSSIBILITIES
CONCLUSION
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CSE-1(Y), 2nd Yr, 4th Sem/Li-Fi/06.04.2018

3. INTRODUCTION
FORM OF VISIBLE LIGHT COMMUNICATION
SIMILAR TO WI-FI
USE OF LED LAMPS
INTRODUCED BY HARALD HASS
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CSE-1(Y), 2nd Yr, 4th Sem/Li-Fi/06.04.2018

4. ARCHITECTURE
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Fig 1: Architecture of Li-Fi
SERVER
INTERNET
LAMP DRIVER
LED LAMP
Li-Fi DONGLE
DEVICES
CSE-1(Y), 2nd Yr, 4th Sem/Li-Fi/06.04.2018

5. FLICKERING LEDs
DATA MODULATION
MODULATION TECHNIQUES
 OFDM
 OOK
 PWM
HOW Li-Fi WORKS?
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CSE-1(Y), 2nd Yr, 4th Sem/Li-Fi/06.04.2018

6. BANDWIDTH
DATA DENSITY
HIGH SPEED
LOW COST
SAFETY
FEATURES AND BENEFITS
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CSE-1(Y), 2nd Yr, 4th Sem/Li-Fi/06.04.2018

7. Li-Fi VS Wi-Fi
Li-Fi
• USES VISIBLE LIGHT
• NO LICENSE REQUIRED
• AROUND 1 Gbps DATA
TRANSFER SPEED
• MORE SECURED
• DOES NOT EMIT ANY
RADIATION
• CHEAPER THAN WI-FI
• CONSIDERABLY HIGH
DATA DENSITY
Wi-Fi
• USES RF SIGNALS
• LICENSE REQUIRED
• AROUND 150 Mbps DATA
TRANSFER SPEED
• LESS SECURED
• EMITS HARMFUL
RADIATION
• MORE EXPENSIVE
• VERY LOW DATA
DENSITY
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CSE-1(Y), 2nd Yr, 4th Sem/Li-Fi/06.04.2018

8. DISADVANTAGES
SHORTER RANGE
NEW INFRASTRUCTURE REQUIRED
SIZE OF PHOTO DETECTORS
DEVICE WITHIN LINE OF SIGHT
DEPENDENCY ON LIGHT SOURCE
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CSE-1(Y), 2nd Yr, 4th Sem/Li-Fi/06.04.2018

9. APPLICATIONS
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SMART LIGHTING
MOBILE CONNECTIVITY
HAZARDOUS ENVIRONMENT
HOSPITALS
UNDERWATER COMMUNICATION
CSE-1(Y), 2nd Yr, 4th Sem/Li-Fi/06.04.2018

10. FUTURE POSSIBILITIES
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PORTABLE LI-FI
INTERCONNECTIVITY OF IoT DEVICES
INTERNET IN HOSPITALS AND AIRPLANES
HIGH SPEED INTERNET TO EVERY INDIVIDUAL
CSE-1(Y), 2nd Yr, 4th Sem/Li-Fi/06.04.2018

11. CONCLUSION
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PROMISING TECHNOLOGY
SOLUTION TO LACK OF RADIO SPECTRUM
GREENER AND SAFER NETWORKS
CATALYST FOR DEVELOPING TECHNOLOGIES
HEART OF ENTIRE NEW INDUSTRY
CSE-1(Y), 2nd Yr, 4th Sem/Li-Fi/06.04.2018

12. Thank You...