Li fi technology - The Future Wireless Communication

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.

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

TMIn Street Lights

TMIn Transport System

TMIn Aircraft

TMUnderwater

TMIn Power Plants

TMInternet Of Things

TMPotential Scenario of Li-Fi

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