BIDIRECTIONAL COMMUNICATION IN LI FI TECHNOLOGY

Project Title

BIDIRECTIONAL COMMUNICATION IN LI FI TECHNOLOGY

Project Area of Specialization Cloud Infrastructure,Project Summary

Here we describe the Bidirectional implementation of Li-Fi technology for transmitting data in the form of text and image.

Cellular network systems have experienced exponential growth and there are currently around 1.4 billion users worldwide. Ultra-wideband radios are extremely wideband radios with very high potential data rates. Paging systems transmits a short paging message simultaneously from many base stations or satellites at very high power.

ln Li-Fi technology, the transmitter part consists of microcontroller which converts data signal into binary 0’s and 1’s where 0 represents OFF and 1 represents ON of the LED. The output appears constant as the intensity of LED is rapidly modulated which cannot be noticed by human eye.

The transmitted signal is received by photo detector, amplified to remove noise and then regenerated into desired signal. The regenerated signal should be able to read by the computer. The frequency ranges used by Li-Fi is between 400THz to 800THz. Li-Fi uses visible light spectrum to obtain high data rates of 500 mbps. Parallel transmission is done embedding an array of LED’s or by using green, red, blue LED’s which has different frequency range to obtain high data rates

Project Objectives

The main objective of VLC standard is to focus on medium-range communications for intelligent traffic systems at low-speed and on short- range mobile to mobile and fixed to mobile communications at high speeds to exchange data. Data rates are supported up to 1 Gbps using various modulation schemes.

Project Implementation Method

Benefits of the Project

• High Speed( LiFi provides speeds around 100 times faster than currently achievable speeds in WiFi)
• Faster Communication( which result in better service quality and better communication)
• High Efficiency (LiFi is much more efficient when it comes to cost and power consumption)
• Secure Connection
•  Underwater Communication

Unimpeded By Radio Interference

Technical Details of Final Deliverable

Li-Fi represents Light Fidelity; Li-Fi technology is a milestone in the history of wireless communication system. Since the number of people using wireless internet has increased, the network speed is reduced. Wi-Fi uses RF bandwidth which has more traffic so the possibility for interference is more. This can be overcome by using Li-Fi technology which implements transfer of data through simple light source (LED). Li-Fi uses LED for transmitting wirelessly, this method is called Visible Light Communication (VLC). It provides large bandwidth, security and low cost compared to other wireless communication systems. The systems using Li-Fi technology are Unidirectional which lacks in getting acknowledgement. This paper describes the Bidirectional implementation of Li-Fi technology for transmitting data in the form of text and image.

Final Deliverable of the Project HW/SW integrated systemType of Industry Telecommunication Technologies Internet of Things (IoT)Sustainable Development Goals Industry, Innovation and InfrastructureRequired Resources

Item Name	Type	No. of Units	Per Unit Cost (in Rs)	Total (in Rs)
			Total in (Rs)	60600
Photo Diodes	Equipment	4	5000	20000
A/D converter	Equipment	2	500	1000
Router	Equipment	1	3000	3000
Raspberry-pi	Equipment	2	16000	32000
Op AMP amplifier	Miscellaneous	2	200	400
ULN 2803	Miscellaneous	2	800	1600
RS 232	Miscellaneous	2	300	600
RGB LED	Miscellaneous	1	2000	2000