Li-Fi Technology.pptx

LIFI

Li-Fi ( Light Fidelity).Submitted for:Dr. Mosbah Shaat.

By:Mahmoud Abuzayed 120101874Introduction to Li-FiWireless communication through Light illuminationA Historical Review

Present Wireless CommunicationRadio spectrum1.4 Million base stations, 5 billion Mobile stations600TB data every month

Wireless Communication, a utilityPersonal lifeBusiness lifeHospitalsResearch and developmentSecurity

Issues regarding Radio spectrum

CapacityWe Transmit data using Radio waves.Cost and Expensive.Less Bandwidth compared to other spectrums.Insufficient spectrum for increasing data.EfficiencyMillions of base stations consume huge amount of energy for 1.Transmitting the radio waves. 2.To cool the base station cabins.5% Efficiency. AvailabilityAvailable within the range of Base stations.Limited availability.Unavailable in aircrafts.SecurityLess secure(passes through the walls)

Is not used generallyUsed for hospitalsDangerous for human body

Expensive, Limited BWLess Secure

Which is not used so farSafe to useLarger bandwidth Low power ApplicationsHow Li-Fi?Normal light power is replaced by LED light powerThe LED bulb will hold a micro-chip that will do the job of processing the data.The light intensity can be manipulated to send data by tiny changes in amplitudeProperties of LED: (Fundamental property of LI-FI) 1.Intensity can be modulated into very high speeds and varying amplitudes 2.LED can be switched on and off with very high speed

Infrared rays in Remote control

Single data stream10,000 or 20,000 bits per secondNot usable for video streaming

LI-FILI-FILight power(LED)Multiple data streamHigh speedTechnologies used in LI-FI: SIM-OFDM and Spatial modulation

AdvantagesLarger bandwidth (10,000 times the radio bandwidth)High efficiencyMore availabilityHighly secure

1. In RF restricted Environments

APPLICATIONS2. Hospitals(In few medical instruments)

3. In vehicles and traffic lights, reducing accidents and traffic congestion

4. Street lamps(as free access points)

5. In Aircraft cabins

Li-Fi and Wi-FiAppearance of the Li-Fi cannot wipe off the need of Wi-Fi.

Li-Fi is a complementary.