Li-Fi Technology in a nutshell
Li-Fi, or Light Fidelity, is suddenly in the news these days because an Estonian company called Velmenni conducted a real-world test where it was able to transfer data between devices at 1 Gbps, which is roughly 100 times faster than Wi-Fi in the real world.
How Li-fi Works- The Internet and router/server is hooked to a cable, and the cable is attached to any number of LED bulbs in your house. The LED bulbs then transmit the data as modulating light waves while a photo detector on your phone or laptop picks up those light waves and decodes them. So anywhere if your LED bulb is casting light that your photo detector can “see”, you’re ready to get Internet access — and at speeds faster than Wi-Fi.
Difference between LI-fi & Wi-Fi:
- Operation-Li-Fi transmits data using light with the help of LED bulbs whereas Wi-Fi transmits data using radio waves with the help of Wi-Fi router.
- Speed- Li-Fi is much faster than existing Wi-Fi speeds.
- Operation-Li-Fi transmits data using light with the help of LED bulbs whereas Wi-Fi transmits data using radio waves with the help of WiFi router.
- Interference- In Li-fi there is less interference while using as it can pass through salty sea water, works in dense region whereas in Wi-Fi interference is more, as it cannot pass through sea water, and dense region.
- Privacy-In Li-Fi, light is blocked by the walls and hence will provide more secure data transfer and in Wi-Fi, RF signal cannot be blocked by the walls and hence need to employ techniques to achieve secure data transfer.
- Data transfer speed- In Li-fi you can enjoy the speed of Data transfer of around 1Gbps whereas in Wi-Fi the speed of data transfer is 150Mbps only. However about 1-2 Gbps can be achieved using WiGig/Giga-IR
- Data density-Li-fi works in high dense environment whereas wi-fi Works in less dense environment due to interference related issues
- System Components -For Li-fi system components include lamp driver, LED bulb(lamp) and photo detector will make up complete LiFi system whereas in wi-fi you require requires routers to be installed.
- Usage- Used in airlines, undersea explorations, operation theatres in the hospitals, office and home premises whereas wifi gives the frequency of 2.4GHz, 4.9GHz and 5GHz.
However there is no news about when is it going to launch but we wish that this new technology will be launching soon.