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The life changing LiFi

Since WiFi's  accidental discovery by Australian Electrical engineer Dr. John O Sullivan, WiFi has revolutionized the digital communication and makes about 60% of the world's internet traffic. With all of these, WiFi has some issues
 1. its has varied signals
 2. it is not secure because the signal can travel through walls and can get picked by another user.

The reason for all of these is that WiFi uses radio waves to transmit data.We can improve this technology by looking at something that is cheap, safe, plentiful and more advanced for data transfer. The answer to this is light since it is a part of electromagnetic spectrum like radio waves but have much higher frequency i.e the waves can carry energy cycle at faster rate . Light has frequency range 10000 times greater than radio waves. That means it has the capacity to transmit large amount of data in less time. The concept of light being used as medium to transfer internet data has been coined as LIFI that means 'light fidelity' . This technology is founded by Harald Hass.

Lifi is high speed bi - directional networked and mobile communication of data using light. A normal remote control have infrared rays which transmit low speed single stream data at the rate of 10000-20000 bits per second which cannot even load YouTube videos. But Harald Hass has developed a technology through which thousand of multiple stream data at much higher speed in parallel using new LED bulb.

APPLICATIONS 
The application of LiFi are limitless. Anywhere there is an LED light there can be data. Lifi is a platform technology that will  extend the capabilities of wireless communications to places beyond even our current  conception.
Today there are real life applications and benefits for implementing Lifi. It can enable secure wireless communications, connectivity in RF hostile environments such as petrochemical plants and hospitals. It also provides high speed, dense and reliable networks for enterprise environments and a pathway to enable smart building, transport, cities and nation.

BENEFITS
1. Secure- Light can be contained and it cannot travel through walls, which means signal can be secured in physical space.
2.Density- Lifi can achieve approximately 1000 times data density of WiFi offering more data per sq.meter. This is an important factor for wireless efficiency.
3.Smart lighting - Any private or public lighting including street lamps can be used as Lifi hotspot and the same  communication infrastructure can be  used to monitor and control lighting and data.
4.Location Services- Lifi systems are fully networked and each Lifi enabled light has a unique IP address which means advanced geofencing can be deployed simply in a Lifi network.

Avinash Kumar Singh
AEIE 1st year
HIT- K

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