Presentation on li fi
- 1. NAME: HIMANSHU SHAKYA COURSE: B.TECH (2 YEAR) BRANCH: CSE TOPIC: LI-FI (LIGHT FIDELITY) INDUS INSTITUTE OFTECHNOLOGY & MANAGEMENT (KANPUR)
- 3. FOUNDER OF LI-FI 1) The term Li-Fi was coined by, Professor Harald Haas 2) Ted-globalTalk back in 2011 where he demonstrated Li-Fi for the first time.
- 4. LI-FI (LIGHT FIDELITY) • Li-Fi is high speed bidirectional networked • Communication of data using visible lights • LiFi is a category of Optical Wireless Communications (OWC) •Li-Fi is 1000 times faster than the Wi-Fi
- 5. NEED OF LI-FI • Radio spectrum conjusted, but the demand for wireless data doubles each year • Issues regarding radio spectrum, such capacity, availability, efficiency, security are solved using Li-Fi • Speed of data transmission can be increased
- 7. HOW IT WORKS…? • All the data from Internet is streamed into lamp driver. • Data from internet is used to modulate the intensity of LED light source. • Thus by fast and subtle variations of current, optical output can be made to vary at extremely high speed • The photodetector picks up the signal •The receiver dongle then converts the tiny changes in amplitude into a data stream
- 8. Li-Fi NETWORK • Li-Fi connector and router are the main components for a network • Room connector: 1. Optical signals cannot penetrate through walls, in order to provide an opticalWLAN, rooms need to be connected with each other 2. Li-Fi room connector is a replicator, which sends the data stream from one side of the wall to the other side via an optical fiber. 3. For smaller rooms, connector act as the only Li-Fi hotspot in the room
- 10. Li-Fi can be used in: 1) In Hospitals- Places where it is difficult to lay optical fibers like operation theaters
- 11. 2)Traffic scenarios, thereby reducing accidents
- 12. 3) Used in Radio Frequency restricted environments like chemical industries, nuclear power plants, petrol pumps
- 13. 4) In offices: such as laptop, printer,ac,etc
- 14. 5) Li-Fi can be more useful at the time of disaster such as earthquake or floods
- 15. ADVANTAGES • Data rate greater than 10 Gbps • Can be used anywhere, even in RF restricted areas; Since light waves will not interfere with radio waves. • Mostly LED light bulbs are used, which consumes less energy. Hence cost efficient. • As light waves cannot penetrate through walls, the data cannot be intercepted;Thus provides secured communication.
- 16. LIMITATIONS • Visible light cannot penetrate through solid objects. • Interferences from external light sources like sunlight, in the path of transmission will cause interruption in the communication. • Data transmission can be easily blocked by any object placed in front of LED source.
- 17. CONCLUSION Thus, if Li-Fi technology can be put into practical use, every bulb can be used as an alternative to WiFi hotspots. It provides simple, faster and efficient wireless data communication. Li-Fi will make us to proceed towards the cleaner, greener, safer and brighter future.
- 18. THANK YOU………..