Visible Light Communication Essay

1659 Words 7 Pages
Visible Light Communication – Tomorrow’s
Technology

YASHODHA J K NITHYASHREE N
Weir EnSci, Bengaluru Weir EnSci, Bengaluru yashodhajk@gmail.com Nithyashree0292@gmail.com

Abstract-The Visible Light Communication (VLC) is an emerging technology, which provides distinct facilities such as fast data communication, secure data communication, high data rate wireless communication, etc. Instead of radio frequency,
VLC uses light, to transfer data. The visible light spectrum is unlicensed and 10,000 times larger than the range of radio frequencies. It can be used as an alternate to the existing radio based wireless communication technologies or in hybrid.
Moreover, Integrated VLC resolves issue of load balancing in existing wireless
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Keywords: Visible Light Communication (VLC), Light Fidelity
(Li-Fi), Wireless Data Communication,

I. INTRODUCTION
The Visible Light Communication (VLC) is a recent technology that uses light instead of radio frequency signals to transmit the data. It is also known as short-range optical wireless communication. Prof. Harald Haas introduced Light
Fidelity (Li-Fi) which resolves the issue of overuse of radio frequency in Wi-Fi [1] [7]. The objective of VLC is to increase data rates in wireless communication and to have better performance of networks especially for indoor networks using light emitting diode (LED) lamps [2]. LED, has many benefits such as low power consumption, small size, long life, low cost, low heat radiation. So they are used in numerous applications, like traffic lights, advertisement displays, and indoor lighting equipment and so on. LED based Li-Fi can provide internet connectivity to users instead of using existing wireless technologies as it has many advantages such as no electromagnetic interference, easy installation, high data rate, secure data communication and low cost [3]. Ceiling LED lights are used to transmit data to the users inside the
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ADVANTAGES OF VLC
There are many advantages of VLC technology over the other existing technologies as mentioned below:

1.
Speed: The VLC system can provide higher speed as compare to existing deployed wireless communication technologies, which is still in tens of
Mbps. Li-Fi can achieve data rates of over 10 Gbit/s, which is 250 times faster than super-fast broadband.
2.
High-density coverage: Li-Fi is perfect where high density coverage is required but Wi-Fi is meant for general wireless coverage.
3.
Secure: Li-Fi is more secure than Wi-Fi as the light signal can be easily obscured by opaque materials and it cannot penetrate through walls. Moreover,
VLC systems are comparatively secure because there will be no intrusion without a clear line of sight. 4.
Cost: Li-Fi technology is license free. Hence, it is considered cheaper than other licensed technologies.
Li-Fi is expected to be ten times cheaper than Wi-Fi.

5.
No Electromagnetic Interference: Li-Fi can be used in electromagnetic sensitive areas such as in aircrafts, hospitals, and nuclear power plants without electromagnetic interference. However, this is not true for Wi-Fi. Moreover, VLC systems can be deployed

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