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Advantages of LiFi | Disadvantages of LiFi

This page covers advantages and disadvantages of LiFi. It mentions LiFi advantages and LiFi disadvantages. It mentions links to comparison of lifi with wifi.

LiFi Introduction:
• The LiFi is the short form of Light Fidelity.
• This technology is based on visible light communication (VLC).
• Operating range: 380 nm to 780 nm optical band
• LiFi modulation: OOK, VPPM (Varible pulse Position Modulation)

Li-Fi internet architecture

It uses two main components LiFi controller or coordinator and LiFi dongles. The technology uses LED lamps on source side and photo detector based LiFi dongles on destination side. It is used for lighting and data communication related applications such as signboards, traffic signals, street lights, internet etc.

Advantages of LiFi

Following are the advantages of LiFi:
➨The data transfer rate for internet application is higher.
➨It provides high amount of security as data communication is line of sight (LOS). Moreover lifi signal covers low region does not pass through the walls. This will avoid unwanted access of lifi signal by unauthorized persons.
➨The lifi devices consume low power for operation and hence used in IoT applications.
➨It uses optical spectrum and hence avoids already crowded RF spectrum.
➨As it operates on optical bands which are not harmful like RF spectrum. Hence there is no health concerns in LiFi based system.
➨There is great amount of energy reduction in lighting industry which uses LiFi based devices.
➨It is easy to install.

Disadvantages of LiFi

Following are the disadvantages of LiFi:
➨Internet can be used only where light of source device is available. Moreover light can not penetrate from walls and it works only in line of sight path. This limits access of internet whereever one requires. Moreover its range is limited.
➨It can not be used in outdoor environment like RF signal. This is because of interference caused by sunlight and other optical sources present nearby. Moreover it can be intercepted by the unwanted people if used outdoors.
➨Though the installation is simple, Lifi system requires whole new infrastructure. This will add cost to the companies/people wanting to take LiFi Internet service.
➨Though it draws low power, in order to avail lifi internet services, lights need to be kept ON throughout day and night. As internet is need of the hour, this will waste energy more than any other internet system.
➨One can not watch games and videos on internet in the dark during night before sleeping on the bed.

LiFi and WiFi Related Links

LiFi tutorial
LiFi vs WiFi basics
Data Over Light basics mentioning how Li-Fi works
WiFi Internet using WiFi hotspots
MiFi vs WiFi
WiFi RF Channels

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