Li-Fi Technology
-
Upload
kaushik-chakrabarti -
Category
Technology
-
view
1.047 -
download
5
description
Transcript of Li-Fi Technology
Meghnad Saha Institute of Technology
A SEMINAR ON
LIFIA future technology in wireless communications
Meghnad Saha Institute of Technology
PRESENTED BY THE FOLLOWING 3RD YEAR ECE STUDENTS
1. Sarmishtha Basak2. Kaushik Chakrabarti 3. Chandradeep Chakravarti4. Joshita Ghatak
Meghnad Saha Institute of Technology
UNDER THE GUIDANCE OF
Prof. Oindri Ray, Department of ECE
Meghnad Saha Institute of Technology
CONTENTS
1.INTRODUCTION2.HISTORY 3.ISSUE REGARDING RADIO SPECTRUM4.WORKING PROCESS5.FEATURES6.APPLICATIONS7.ADVANTAGES8.DISADVANTAGES9.CONCLUSION
Meghnad Saha Institute of Technology
LI -FI
Light Fidelity Transmission of data through illumination.
Meghnad Saha Institute of Technology
Li-Fi Carrier is light Transceiver-fitted
LED lamps are used
BASIC DIFFERENCE FROM WIFI
Wi-Fi Carrier is Radio
wave Wi-Fi modems are
used
Meghnad Saha Institute of Technology
Inventor of Li-Fi
HISTORY
Harald Hass
Meghnad Saha Institute of Technology
12th July 2011: He used a table lamp with an LED
TED Global: Haas demonstrated a data rate of transmission of around 10Mbps.
2011: He achieved 800Mbps.
RESEARCH OF PROF. HASS
SO A PROVEN TECHNOLOGY
Meghnad Saha Institute of Technology
Availability
Capacity
Efficiency
Security
Issues with Radio Spectrum
Meghnad Saha Institute of Technology
Why OnlyVisible Light
Communication
ONLY LEFT IS THE VISIBLE - LIGHT SPECTRUM
WAVES USABLE WHY
GAMA RAYS Radioactive and dangerous for health
X-RAYS Similar health issues
UV RAYS Harmful for skin and can’t be use for long duration
INFRARED WAVE Eye safety regulations and only be used in low power
Radio waves Expensive, energy consuming
Meghnad Saha Institute of Technology
Meghnad Saha Institute of Technology
Light based Wi-FiThus Every light source is a HubLED on= 1LED off= 0Operating speed of LED <1 μs
BASIC CONCEPTS
Meghnad Saha Institute of Technology
MECHANISM
Meghnad Saha Institute of Technology
Meghnad Saha Institute of Technology
LIFI HAS THE UPPERHAND DUE TO PARALLAL DATA TRANSMISSION
Meghnad Saha Institute of Technology
Giga Shower
WORKING MODELS
Giga MIMO
Meghnad Saha Institute of Technology
Primary sub-assemblies:• Bulb• RF power amplifier circuit (PA)• Printed circuit board (PCB)• Enclosure
CONSTRUCTION
Meghnad Saha Institute of Technology
IMPLEMENTATION
Meghnad Saha Institute of Technology
LI-FI vs. WI-FI
S. No.
Parameter Li-fi Wi-fi
1 SPEED > 1 GB/S around 150 Mb/s
2 Medium of data transfer
Use light as carrier
Use radio spectrum
3 Spectrum range Visible light has 10000 times more
Having less spectrum range than VLC
4 Cost Cheaper Expensive
5 Network topology Point to point Point to point
6 Operating frequency
Hundreds of Tera Hz
2.4 GHz
Meghnad Saha Institute of Technology
COMPARISON WITH OTHER TECHNOLOGIES
Meghnad Saha Institute of Technology
POTENTIAL APPLICATIONS
Meghnad Saha Institute of Technology
DAILY LIFE WITH LI-FI
POTENTIAL APPLICATIONS
Meghnad Saha Institute of Technology
POTENTIAL APPLICATIONS
IN RF RESTRICTED ENVIRONMENTS
Meghnad Saha Institute of Technology
POTENTIAL APPLICATIONS
IN AIRCRAFT CABINS
Meghnad Saha Institute of Technology
POTENTIAL APPLICATIONS
USE IN OPERATION THEATER
Meghnad Saha Institute of Technology
TRAFFIC CONTROL
POTENTIAL APPLICATIONS
Meghnad Saha Institute of Technology
STREET LAMPS AS FREE ACESS POINTS
POTENTIAL APPLICATIONS
Meghnad Saha Institute of Technology
1.Availability2.Efficiency3.High Security4.Easy to Use 5.Fast data transfer 6.Harmless7.Low cost
ADVANTAGES
Meghnad Saha Institute of Technology
1. PRESENCE OF LIGHT IS ESSENTIAL2. WORKS BETTER IN LED BUT VERY LOW EFFICIENCY WITH BULBS4. VISIBLE LIGHT CAN’T PENETRATE THROUGH SOLID OBJECTS
LIMITATIONS
Meghnad Saha Institute of Technology
CONCLUSION
Meghnad Saha Institute of Technology