Li-Fi: A New Wireless Technology on the Rise.
(Qazi Matiullah, Islamabad)
Since Wi-Fi is an accidental
invention in 1992 by Australian radio astronomer Dr. John O'Sullivan through a
failed experiment to detect exploding mini black holes. Wi-Fi has revolutionized
digital communication without it our current mobile way of life would be
somewhat different. Wi-Fi currently makes up 60% of global Internet traffic with
all of that being said Wi-Fi still has some issues it's vague at times with a
fluctuating signal and it's not totally secure because your signal can travel
through walls and be easily picked up by someone else. The explanation behind
the greater part of this is Wi-Fi utilizes radio waves to transmit information.
Now scientists have invented another wireless communication for computers that
is 100 times faster than Wi-Fi called Li-Fi. It's a wireless internet technology
that helps to transmits data at higher bandwidth speed by means of flickering
LED light fields between 400 and 800 terahertz. It's a process known as Visible
Light Communication, which is like an advanced form of morse-code but special
receivers that can be connected to your computer or other device can translate
this flickering into actual data. Visible light has the advantage that is less
liable to have interference than radio waves and you end up with a communication
standard that could be much faster than Wi-Fi in fact researchers at Oxford
achieved speeds of 24 gigabits per second interlaboratory that's over 200 times
faster than even a Google Fiber internet connection. Since Li-Fi uses relatively
inexpensive LED bulbs which consume less power than a Wi-Fi access point visible
light networks could be deployed relatively cheaply using mostly existing
technology the power savings also potentially could have significant
implications for global energy consumption.
Light is actually just part of the electromagnetic spectrum just like radio
waves but light has a much higher frequency than radio waves which gives it a
boost up on the bandwidth speed. The waves that carry the energy, move at a much
faster rate than radio waves. Light also has a frequency range that is 10,000
times greater than radio waves that goes up to 790 terahertz while its 300
gigahertz for radio waves. All this means is that light has the capacity to
transmit vastly more amount of data in much less time than radio waves. As light
cannot pass through walls, data cannot be hacked by outside users and hence it
provides one more layer of security to the network.
In November 2014, Li-Fi pioneers “Pure Li-Fi” joined forces with French lighting
company Lucibel to launch Li-Fi enabled products.
Pure Li-Fi already has two products on the market: Li-Flame Ceiling Unit to
connect to an LED light fixture and Li-Flame Desktop Unit which connects to a
device via USB, both aiming to provide light and connectivity in one device.
Plus, with faster connectivity and data transmission it’s an interesting space
for businesses. The mixing of internet of things devices and Li-Fi will provide
a means of opportunities for retailers and other businesses alike. For example,
shop owners could transmit data to multiple customers' phones quickly, securely
and remotely.
In Dubai Li-Fi is being tested by UAE-based telecommunications provider, du and
Zero1. They have also successfully provided internet, audio and video streaming
over a Li-Fi connection. Apple may also build future iPhones with Li-Fi
capabilities.