li fi technology - the future wireless communication
TRANSCRIPT
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The Future Technology In Wireless Communication
Nisha Sharma
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The Mobile Revolution
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PRESENT SCENARIO
1.4 Million
5 Billion
This year,for the first time,there will be more mobile phones on the earth than there are people.
…by 2018,sending the equivalent of 1.8 million years of HD video every month.
By 2020…1000 wireless devices per person. ANDAvailable spectrum will run out.
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Whatis
Li – Fi ?LI-FI is transmission of data through illumination, sending data through a LED light bulb.
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TMProf. Harald Hass,Developer of Li-Fi
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Principles Of Li - Fi
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1101011110001010101001
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01010001011101010
01010001011101010
11101010100010101
10100001010111010
11101010100010101
01010001011101010
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What is
LED ?
(Light Emitting Diode) • Semiconductor Light Source
• p-n junction diode which emits light
•Includes electroluminescence
•Electron recombines with holes when voltages are provided , releasing energy in the form of photons
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(Light Emitting Diode)
Mirrored cup
p-typen-type
p-type
n-type
energy
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Why only
LED ?
NOT Consistent
Light bulbs ?
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How
Li - Fi
Works ?
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LED on
LED off
1 0 1 1 0 1 0 1
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TMLi - Fi Environment
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10 0 10 3 10 4 108 109 1011 1012 1014 1015 1016 1017 1019 1020 1024
Long Radio Waves
Radio Waves
Microwaves
Infra red
Ultraviolet
X-rays Gamma rays
Visible
Electromagnetic Spectrum
10,000
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Issues Regarding Electromagnetic Spectrum
Capacity Availability
Efficiency Security
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Difference between Li-Fi AND Wi-Fi
Wi - FiLi - Fi 10 Gbp
s
150 mbp
s
Speed
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Difference between Li-Fi AND Wi-Fi
Wi - FiLi - Fi LIGHT
Radi
owavesMedium for
Data Transmission
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Difference between Li-Fi AND Wi-Fi
Wi - FiLi - Fi
10,000 times greate
r Spectr
um
Less Spectrum Rang
e
Capacity
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Difference between Li-Fi AND Wi-Fi
Wi - FiLi - Fi
Li-Fi uses
power efficiently
Radio base
stations
requires a lot
of energy
Efficiency
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Difference between Li-Fi AND Wi-Fi
Wi - FiLi - Fi
LEDs should
be availab
le
Radio waves have
certain limitati
ons
Availability
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Difference between Li-Fi AND Wi-Fi
Wi - FiLi - Fi Higher
Less
Security
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Five points need to know about Li-Fi
There is NO visible flicker.
Lights can be dimmed and still transmit.
Sunlight causes no interference.
Li-Fi uses power efficiently.
It does not need to be Line-Of-Sight to work.
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Applications OF Li – Fi
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TMIn Street Lights
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TMIn Transport System
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TMIn Aircraft
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TMUnderwater
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TMIn Power Plants
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TMInternet Of Things
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TMPotential Scenario of Li-Fi
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