Li-Fi(Light-Fidelity)
- 1. Li-Fi(Light-Fidelity) Presented by, K. Arun (ІІІ-ECE-A)
- 2. Contents • INTRODUCTION TO LI-FI • HOW DOES IT WORKS? • COMPARISON WITH WI-FI • ISSUES WITH RADIOWAVE • PROS OF LI-FI • IS IT A PROVEN TECHNOLOGY? • FUTURE TECHNOLOGY
- 3. INTRODUCTION TO LI-FI • Li-Fi is a technology that uses the Light Emitting Diodes to transmit data wirelessly. • Fast and Cheap optical version of Wi-Fi, based on VLC. • VLC is a Data Communication medium which uses the visible light between 400 THz (780 nm) and 800 THz (375 nm) as optical carrier for data transmission
- 5. Who invented it? • German Physicist Prof. Harald Haas, from the University of Edenbergh, U.K. • Demonstrated in the year of 2012.
- 6. How does it works?
- 7. • The heart of the technology is the generation of high brightness LEDs. • If LED is ON, transmit a digital signal 1 and if the LED is OFF transmit a digital signal 0. • Controller is connected at the back side of these bulbs are used to code this LEDs
- 8. Li-Fi Vs Wi-Fi Data Transfer Speed • Li-Fi has a High speed data transfer rate over 1Gbps. • Li-Fi uses the Visible portion of the EM • Wi-Fi has a maximum data transfer rate of 54Mbps. • Wi-Fi uses the Radio wave portion of EM.
- 9. Issues with Radiowave and an Alternative Capacity Efficiency Security Availability More Expensive
- 10. Contd. • Can it be IR,UV,GAMMA or X-Rays? – No All the above rays are harmful to human being when exposed to different proportions. So, We are left only with Visible spectrum
- 11. Pros of Li-Fi technology Capacity. Efficiency. Security. Availability. Installed in all places. No License needed. Millions of street lights can be converted into efficient Li-Fi spots.
- 12. Is it a proven technology? • Yes, this is a proven technology. • Harald Haas demonstrated this technology using an ordinary table LED lamp that successfully transmitted data at speeds 10Mbps. • To prove that the light is the source for data streaming he periodically blocked the light, to made the connection drop.
- 13. Future Technology • 10Gbps data transmission is recently achieved through Li-fi, while others didn’t. • Spectrum is more broader and less cost compared to RW spectrum which is more expensive today. • Installed easily in all areas and more secure among hackers.
- 14. References • www.wikipedia.org/li-fi • www.whatistechtarget.com/li-fi • www.zigmag.com/li-fi • www.lificentre.com
- 15. Thank you
- 16. Queries