WHAT IS LI-FI, TECHNOLOGY THAT
CHANGES PEOPLE REPLACE WIFI
Technology
is growing very rapidly indeed make us as a helpful user as well as sometimes
made overwhelmed. Of the many technologies there may be some of them that have
made us satisfied. But did you know that out there experts are still constantly
innovating and developing existing technology. One of the technologies that are
now being innovated is Wi-Fi.
Wi-Fi
that we know as wireless technology for an internet network, may soon be
changed. The results of experiments conducted by Oxford University and University
College recently obtained a system result called Li-Fi, a technology in which
light serves as a data delivery medium that can transfer data at speeds of up
to 100 Gbps.
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| LIFI Picture |
Speed
that reaches many times faster than Wi-Fi is allegedly will be the latest
wireless network technology that will replace Wi-Fi. Then what does this Li-Fi
technology really mean? Here's the review.
What is Li-Fi?
Li-Fi
itself is an acronym of Light Fidelity is a wireless network for communication
systems that use light as the medium. And this technology no longer uses
conventional radio frequency on Wi-Fi. The technology that can transfer data up
to 100 Gbps has been successfully demonstrated on a pair of Casiosmartphones at
the 2012 Consumer Electronics Show in Las Vegas.
How does Li-Fi Work?
To
make this Li-Fi work, you need two light sources located on each end of the
device. Light source that can be used is LED or photo detector (Light Sensor).
When the LED light is on, the sensor light at the other end of the device will
detect it and define it as binary 1.
Then
what kind of data can be sent with this Li-Fi technology? In the amount of
light of that particular LED, a message will be transmitted and then captured
by the light detector on the other device
Furthermore,
this Li-Fi technology will use some color on the LED light. If these colors are
lit together then this will create a huge information building to be sent in
one go.
Currently
only with the use of green lasers and red lasers at the same time a data can be
sent at a speed of 1 Gbps. What if this technology uses many colors? Of course
the speed will reach many times over.
Why Li-Fi So Fast?
Li-Fi
which has data rates many times compared with Wi-Fi is due to the type of LED
which is a semiconductor have different properties than other types of lights.
With these properties and traits the LEDs are able to switch on and off in a
few nanoseconds or billions of seconds.
This
nanodetic if converted in data rate equal to 1 Gbits / s. Therefore when Wi-Fi
can only reach 100 Mbits / s data speed, then this means Li-Fi has a speed 10
times faster than Wi-Fi.
Advantages and Advantages of
Li-Fi
The
advantage of using Li-Fi is that it makes it easy for anyone to access the
internet anywhere even in remote areas that can not be reached by optical
cable. In addition Li-Fi can also be used to control traffic conditions by
placing this new technology into car LEDs.
The
same function can also be applied with overhead lights. Another advantage of
Li-Fi technology is that it can reduce the electromagnetic pollution generated
by radio waves.
Weaknesses and Li-Fi Challenges
Despite
having many advantages Li-Fi technology also still has some disadvantages
compared to conventional Wi-Fi system. Li-Fi that is applied in base station on
the ceiling of this room requires direct line of sight or "view"
directly to the destination device. Direct line this turned out to also have a
special receiver , such as infra red connection on old gadgets .
In
addition, this destination device must not be moved. From the current
developments, Li-Fi technology also has many challenges, including the perfect
line-of-sight to transmit data.Another major challenge is how to transmit data
back to the transmitter optimally.
From various sources