HIGH SPEED AND SECURE COMMUNICATION through LIGHT FIDELITY

Project Title

HIGH SPEED AND SECURE COMMUNICATION through LIGHT FIDELITY

Project Area of Specialization Internet of ThingsProject Summary

Li-Fi stands for Light-Fidelity. The technology is very new and was proposed by the German physicist Harald Haas in 2011. Li-Fi provides transmission of data through illumination by sending data through an LED light bulb that varies in intensity faster than human eye can follow. In this project report, the authors will discuss the technology in detail and also how Wi-Fi can be replaced by Li-Fi. Wi-Fi is useful for general wireless coverage within buildings while Li-Fi is ideal for high density wireless data coverage in confined areas where there are no obstacles. Li-Fi is a wireless optical networking technology that uses light emitting diodes (LEDs) for transmission of data. The term Li-Fi refers to visible light communication (VLC) technology that uses light as medium to deliver high-speed communication in a manner similar to Wi-Fi. Li-Fi provides better bandwidth, efficiency, availability and security than Wi-Fi and has already achieved high speeds in the lab experiments. In the present paper the authors will give a detailed study on Li-Fi technology, its advantages and its future scope.
 

Project Objectives

1. To reach speeds of 100Kbps
2. To transmit data 80% correctly
3. To have packet size of 100 bits /packet
4. To detect error in data sent
5. To transmit & recieve at range of 3 meters.

Project Implementation Method

The projects uses a transmiter and a reciever.The transmitter is a light source which blinks, as a result the on(1 bit) & off(0 bit) are tranmitted successfully to reciever which can be an array photodiodes that senses these streams of bits interpreting them into data which is obviously made from bit streams.

In this project speed is given an importance as we have to transmit it by using an arduino mega or raspberry pi(for more computational power and frequency).The more the blinking rate a microcontroller & LED can be able to handle the more speed we have.

The communication is made secure by transmitting data into packets.These packets have data + error detecting & correcting IDs which are formed according to data written in transmitter.

The use of Forward error correction technique is applied giving us 64 bits code word per character written which enable a very high security protocol for our communnication with upto 33% error correction capability & 66% error detection capabilities.

Benefits of the Project

1. Healthy enviroment for communication without any interference with wifi and without disturbing human health as we don't use electromagnetic spectrum
2. Already  use of light bulbs means lifi can be easily installed & new infrastructural changes aren't required meaning it's easy for project to commercialise.
3. Higher speed and availability of bandwidth is another benefit that can revolutionize communications

Technical Details of Final Deliverable

1. Project has been delivered by implementing both hardware & software.
2. Hardware is able to communicate at 100kbps with ranges of 3-4 meters.
3. Forward Error Correction is implemented at 64bit level security for each character transmited.
4. The hardware has transmitter Arduino Mega in which input is given & a recievrer Arduino Mega to recieve data.
5. Circuitary at both Tx & Rx sides have been used that includes LEDs and photodiodes togehter with with ICs that operate high frequency switching of LEDs for higher blinking rates.

Final Deliverable of the Project HW/SW integrated systemType of Industry Telecommunication Technologies Others, Clean TechSustainable Development Goals Good Health and Well-Being for People, Affordable and Clean Energy, Industry, Innovation and InfrastructureRequired Resources

Item Name	Type	No. of Units	Per Unit Cost (in Rs)	Total (in Rs)
			Total in (Rs)	66780
ARDUINO MEGA	Equipment	2	1300	2600
Breadboards	Equipment	4	200	800
LABVIEW BASE licensed	Equipment	1	55000	55000
Transmitter module	Equipment	3	180	540
Reciever Module	Equipment	3	120	360
Wire packs	Equipment	4	120	480
MATLAB Student ADDITION	Miscellaneous	1	7000	7000