Li-Fi

Submitted by:Sania correya

WHAT IS LI-FI?

Li-Fi is the transmission of data through illumination by taking the fiber out of fiber optics by sending data through a LED light bulb.

This varies in intensity faster than human eye can follow.

It is the fast and cheap wireless communication system which is optical which is optical version of the Wi-Fi.

CONSTRUCTION OF LI-FI..

Li-Fi product consists of 4 primary sub-assemblies:

Bulb RF power amplifier circuit (PA) Printed Circuit Board (PCB) enclosure

CONSTRUCTION OF LI-FI

The PCB controls the electric inputs and outputs of the lamp and houses the microcontroller used to manage different lamp functions.

An RF (Radio-Frequency) signal is generated by the solid-state PA and is guided into an electronic field about the bulb.

CONSTRUCTION OF LI-FI

The high concentration of energy in the electric field vaporizes the contents of the bulb to a plasma state at the bulb’s center; this controlled plasma generates an intense source of light.

All of these sub-assemblies are contained in an aluminum enclosure.

HOW LI-FI WORKS..

Its working is much simply explained as follows:

If the LED is on, the digital 1 is transmitted.

And if it is off, the digital 0 is transmitted.

It is possible to encode data in the light by varying the rate at which the LEDs flicker on and off to give different strings of 1s and 0s.

COMPARISON BETWEEN LI-FI & WI-FI..

Li- Fi is a term of one used to describe visible light communication technology applied to high speed wireless communication.

It acquires this name due to the similarity to Wi-Fi, only using light instead of radio.

COMPARISON BETWEEN LI-FI & WI-FI..

Wi-Fi is great for general wireless coverage within buildings and Li-Fi is ideal for high density wireless data coverage in confined area and for relieving radio interference issues, so the two technologies can be considered complimentary.

COMPARISON BETWEEN LI-FI & CURRENT TECHNOLOGY..

Technology Speed Data density

Wireless (current) Wi-Fi-IEEE 150Mbps

* 802.11n Bluetooth 3Mbps

* IrDA 4Mbps

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COMPARISON BETWEEN LI-FI & CURRENT TECHNOLOGY..

Technology Speed Data density

Wireless (future) Wi-Gig 2Gbps

** Giga-IR 1Gbps

*** Li-Fi 1Gbps

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HOW LI-FI IS DIFFERENT?

Li-Fi technology is based on LEDs for the transfer of data.

The transfer of the data can be with the help of all kind of light i.e., Light may be Invisible, Ultraviolet or Visible part of spectrum.

The speed of the internet is incredibly high and the user everything in just a few minutes.

APPLICATION AREA OF LI-FI TECHNOLOGY:

Some of the applications of Li-Fi are given below:

Airways Green information technology Free from frequency bandwidth problem Increase communication safety Multi user communication Lightings points used as hotspot Smarter power plants Under sea Awesomeness

USES ON APPLICATIONS:

Can be safely used on plains because it does not interfere with radio equipments.

Li-Fi never gives side effect on any living thing .

It does not require any band width spectrum.

Due to VLC, the node or terminal attach to our network is visible to host of network.

Li-Fi supports the broadcasting of network.

Any lightings device is performed as a hostport.

USES ON APPLICATIONS:

Li-Fi could offers safe, abundant connectivity for all various of sensitive locations.

Can be used underwater without radio interference because salt conducts electricity.

ADVANTAGES OF LI-FI..

It is impossible to achieve more than 10Gbps, theoretically allowing a high-definition film to be downloaded in 30 sec.

Mostly powered by LEDs so it is cost efficient

Transmission of data is fast and easy.

CONCLUSION

The concept of Li-Fi is currently attracting a great deal of interest, not least because it may offer a genuine and efficient alternative to radio-based wireless.

As a growing number of people and their devices access wireless internet, the air waves are becoming increasingly clogged, making it more and more difficult to get a reliable, high-speed signal.