1.LIFI

2. Introduction to Li-FiWireless communicationthrough Light illumination 3. Present Wireless Communication Radio spectrum 1.4 Million base stations, 5 billion Mobilestations 600tb data every month 4. Wireless Communication, a utility Personal life Business life Hospitals Research and development Security 5. Issues regarding Radiospectrum 6. Capacity Radiowaves Cost and Expensive Less Bandwidth compared to other spectrums Insufficient spectrum for increasing dataEfficiency Millions of basestations consume hugeamount of energy for 1.Transmitting the radio waves 2.To cool the base station cabins 5% Efficiency 7. Availability Available within the range of Base stations Limited availabity Unavailable in aircraftsSecurity: Less secure(passes through the walls) 8. Expensive, Good to useLimited Bw But harmful toUsed Is not usedLess Securehumanfor generallyhospitalsWhich is not used so farSafe to useLarger bandwith 9. How Li-Fi? Normal light power is replaced by LED light power The LED bulb will hold a micro-chip that will do the jobof processing the data. The light intensity can be manipulated to send data bytiny changes in amplitude Properties of LED: (Fundamental property of LI-FI)1.Intensity can be modulated into very highspeeds and varying amplitudes2.LED can be switched on and off with veryhigh speed 10. Infrared rays in Remote control Single data stream 20000 bits per second Not usable for vedio streaming 11. LI-FI 12. LI-FILight power(LED)Multiple data streamHigh speedTechnologies used in LI-FI: SIM-OFDM andSpatial modulation 13. Advantages Largers bandwidth (10,000 times theradio bandwidth) High efficiency More availability Highly secure 14. DISADVANTAGEPresence of Light is essential 15. APPLICATIONS 16. 1.In RF restricted Environments 17. 2.Hospitals(In few medicalinstruments) 18. In vehicles and traffic lights,reducingaccidents and traffic congestion 19. Street lamps(as free accesspoints) 20. In Aircraft cabins 21. ConclusionOvercomes the limitations of radiospectrumHigh speed of 10 Gbps can beachievedLifi can solve the foressentialproblems of wireless communicationsthese days