High Speed data transmission through Secure Visible Light fidelity Networking

Project Title

High Speed data transmission through Secure Visible Light fidelity Networking

Project Area of Specialization BlockchainProject Summary

Li-Fi stands for light fidelity. This is very nre technology and was proposed by physicist Harald Hass a professor at the university of Edinburg.

Li-Fi is a modern generation of technology in the field of wireless communication to provide connectivity within a network environment. it provides transmission of data through illumination by sending data through an LED light bulb that varies in intensity faster than the human eye can follow. The total LI-Fi technolgy is called visible light communication (VLC). It is used for fast and cheap wireless communication system.

The transfer of information from one place to another is one among the foremost vitel daily activities. this idea was clearified by Harald Hass straight forward and refined words. He said unusually basic if LED is ON, you can exchange a digit 1 and it's OFF you transmit a 0. The LED can be turned ON OFF rapidly which gives us the chance to transmitt information rapidly. Li-Fi proposes the use of increased bandwidth with better speed using visible light as compared to the electromagnetic waves used wi-fi an idea, we can say Li-Fi can offer bandwidth of 300 THz as compare to 300GHz in RF communication.

The current wireless networks that connect us to the internet are very slow when multiple devices are connected. As the number of devices that access the internet, Increases, the fixed bandwidth available makes it more and more difficult to enjoy high data transfer rates and connect to a secure network.

Project Objectives

To transmit data that may be in textual, audio or video form using Li-Fi technology for transfring with the limited bandwidth problem we face in RF (Radio frequency) signals. For better, efficient, secure and a faster connection Li-Fi is used.

Project Implementation Method

Education systems: Li-Fi is the latest technology that can provide fastest speed internet access. So, it can replace Wi-fi at educational institutions and at companies so that all the people can make use of Li-Fi with the same speed intended in a particular area.

Medical Applications: Operation theatres (OTs) do not allow Wi-Fi due to radiation concerns. Usage of Wi-Fi at hospitals interferes with the mobile and pc which blocks the signals for monitoring equipments. So, it may be hazardous to the patient's health. To overcome this and to make OT tech savvy Li-Fi can be used to accessing internet and to control medical equipments. This can even be beneficial for robotic surgeries and other automated procedures.

Cheaper Internet in Aircrafts: The passengers travelling in aircrafts get access to low speed internet at a very high rate. Also Wi-Fi is not used because it may interfere with the navigational systems of the pilots. In aircrafts Li-Fi can be used for data transmission. Li-Fi can easily provide high speed internet via every light source such as overhead reading bulb, etc. present inside the airplane.

Underwater applications: Underwater ROVs (Remotely Operated Vehicles) operate from large cables that supply their power and allow them to receive signals from their pilots above. But the tether used in ROVs is not long enough to allow them to explore larger areas. If their wires were replaced withlight say from a submerged, high-powered lamp  then they would be much freer to explore. They could also use their headlamps to communicate with each other, processing data autonomously and sending their findings periodically back to the surface . Li-Fi can even work underwater where Wi-Fi fails completely, thereby throwing open endless opportunities for military operations. 

 Disaster management: Li-Fi can be used as a powerful means of communication in times of disaster such as earthquake or hurricanes. The average people may not know the protocols during such disasters. Subway stations and tunnels, common dead zones for most emergency communications, pose no obstruction for Li-Fi Also, for normal periods, Li-Fi bulbs could provide cheap highspeed Web access to everystreet corner. 

Applications in sensitive areas: Power plants need fast, interconnected data systems so that demand, grid integrity and core temperature (in case of nuclear power plants) can be monitored. WiFi and many other radiation types are bad for sensitive areas surrounding the power plants. Li-Fi could offer safe, abundant connectivity for all the  areas of these sensitive locations. 

Replacement for other technologies: Li-Fi doesn‘t work using radio waves. So, it can be easily used in the places where Bluetooth, infrared, Wi-Fi, etc. are banned. 

Benefits of the Project

Li-Fi technology is based on LEDs or other light source for the transfer of data. The transfer of the data can be with the help of all kinds of light, no matter the part of the spectrum that they belong. That is, the light can belong to the invisible, ultraviolet or the visible part of the spectrum. Also, the speed of the communication is more than sufficient for downloading movies, games, music and all in very less time. Also, Li-Fi removes the limitations that have been put onthe user by the Wi-Fi. a) Capacity: Light has 10000 times wider bandwidth than radio waves . Also, light sources are already installed. So, Li-Fi has got better capacity and also the equipments are already available. b) Efficiency: Data transmission using Li-Fi is very cheap. LED lights consume less energy and are highly efficient. c) Availability: Availability is not an issue as light sources are present everywhere. There are billions of light bulbs worldwide; they just need to be replaced with LEDs for proper transmission of data. d) Security: Light waves do not penetrate through walls. So, they can‘t be intercepted and misused. 
 
With the advent of Li-Fi, now it is not mandatory to be in a region that is Wi-Fi enabled to have access to the internet. One can simply stand under any form of light and surf the internet as the connection is made if light is present. 

Technical Details of Final Deliverable

Visible light communication (VLC) works by switching the current to the LEDs OFF and ON at a very high speed, too quick to be noticed by the human eye, thus, it does not present any flickering. Although Li-Fi LEDs would have to be kept on to transmit data, they could be dimmed to below human visibility while still emitting enough light to carry data.This is also a major bottleneck of the technology when based on the visible spectrum, as it is restricted to the illumination purpose and not ideally adjusted to a mobile communication purpose. Technologies that allows as roaming between various Li-Fi cells, also known as handover, may allow to seamless transition between Li-Fi. The light waves cannot penetrate walls which makes a much shorter range, though more secure from hacking, relative to Wi-Fi Direct line of sight is not necessary for Li-Fi to transmit a signal; light reflected off the walls can achieve 70 Mbits.

Final Deliverable of the Project Hardware SystemType of Industry IT Technologies OthersSustainable Development Goals Industry, Innovation and InfrastructureRequired Resources

Item Name	Type	No. of Units	Per Unit Cost (in Rs)	Total (in Rs)
			Total in (Rs)	41835
Raspberry Pi 3 Pi3 Model B+ 1.4Ghz	Equipment	3	8000	24000
Solar panel	Equipment	2	1200	2400
LDR	Equipment	15	45	675
HDMI	Equipment	4	900	3600
LED	Equipment	6	120	720
Battery 9v&12v	Equipment	4	300	1200
IR pair	Equipment	8	30	240
Modem 300Mbps	Equipment	2	4500	9000