This
Technology is 100 times Faster than WiFi
THE NEXT IS NOW Lights, windows and
solar panels may soon get you on the internet
A new technology , known as LiFi,
could one day offer internet speeds one hundred times faster than the WiFi we
use today . Scientists have achieved speeds in the lab of up to 224 GB per
second.
That's
the equivalent of downloading 18 movies in the blink of an eye.LiFi, or light
fidelity, is now moving to trials in the real world, with office tests in
Tallin, Estonia achieving speeds of 1 GB per second, 100 times the speed of
traditional WiFi.
The
world's ever-growing desire for more data at faster rates is pushing WiFi's
capacity to its limits. WiFi is achieved by transmitting data through radio
waves, but can only transfer so much at a time. By 2019, it is estimated that
the world will be exchanging roughly 35 quintillion bytes of information each
month. Because radio frequencies are already in use and heavily regulated, that
data is going to struggle to find a spot in line.WiFi is simply running out of
space.
Capacity
is only part of the problem. WiFi is not a terribly efficient solution. The
base stations responsible for transmitting radio waves only function at about
5% efficiency , most of the energy being used to cool the stations. For those
transmitting sensitive data, security is also a problem, as radio waves travel
through solid objects such as walls and doors.
Like
radio waves, visible light is part of the electromagnetic spectrum. The
difference is that viable light has a spectrum 10,000 times larger than radio
waves. This means LiFi has the potential for enormous capacity.Instead of
transmitting information via one data stream, visible light would make it
possible to transmit the same information using thousands of data streams
simultaneously .
LiFi
works by flashing LED lights on and off at incredibly fast speeds, send ing
data to a receiver in binary code. It's es sentially an ultra-fast version of
turning your flashlight on and off to create morse code. The flashes occur so
fast that they are not seen by the naked eye.
All
one need to do is fit a small microchip to every potential illumination device
and this would then combine two basic functionalities -illumination and
wireless data transmission. In In other words, the infrastructure is already
there. We can use the LED bulbs we already have, with some tweaking.
How
Does LIFI works |
Source
| Economic Times | 26 November 2015
Regards
Pralhad
Jadhav
Khaitan
& Co
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