Definition of LiFi
LiFi could be a wireless optical networking technology that uses light-emitting diodes (LEDs) for information transmission. It is intended to use LED light weight bulbs which we are currently using in our homes and offices. However, LiFi bulbs transfer the data through the chip with light focus balance around the information transfer. LiFi information carried with LED bulbs and receive photo receptors.
Working of LiFi
Li-Fi could be visible light Communications (VLC) system for information transmission. A straight forward VLC system has 2 qualifying components:
1) A minimum of one device with a photo diode ready to receive light-weight signals and
2) A lightweight supply equipped with a proof process unit.
A VLC light may comprise of a fluorescent or light-weight emitting diode (LED) bulb. Li-Fi system needs very high rates of sunshine output, diode bulbs square measure ideal for implementing Li-Fi. the diode could be a semiconductor light, which means that diode light-weight bulbs will amplify candle power and switch quickly. Therefore, diode cells will modulate thousands of signals which can not be noticed by human eye. In turn changes in candle power from the diode light square measure taken and reborn into electrical current by the receiving photodiode device. Once the signal is demodulated, it’s reborn into an endless stream of binary information comprising of audio, video, web, and application info to be consumed by any Internet-enabled device.
There is ample space for growing innovation in Li-Fi technology. Like standard broadband and Wi-Fi, Li-Fi may operate as a bi-directional communication system. By interchanging light and infrared from a photograph detector, a mobile device connected there to photograph detector will send information back to the sunshine supply for transmission. Also, multi-colored RGB (Red/Green/Blue) junction rectifier’s at membrane size may be built to send and receive a wider variety of signals than single-colored phosphor-coated white LED.
Differences between WiFi and Li-Fi
- Li-Fi uses the sunshine of LED’s to transfer the info, on the opposite hand, Wi-Fi uses the Radio or Electrical pulses to transfer its information.
- It is a wireless device and WiFi requires a wire for an electric pulse.
- Li-Fi doesn’t penetrate the physical barrier on the alternative hand Wi-fi has the facility to travel on the way facet the physical barriers.
- Li-Fi provides an additional security as we all know that Li-Fi cannot penetrate any physical barrier, therefore, nobody is ready to insecure your network whereas Wi-Fi works on radio waves, therefore, it’s a high risk of being hacked.
- It isn’t plagued by RF-emitting instrumentation whereas Wi-Fi will simply be plagued by RF-emitting instrumentation.
- LI-Fi will simply transfer information upto 10.5Gbit/second whereas common place 801.11ac Wi-Fi will deliver the most speed of 867 Megabits/second.
- The data transfer rate for internet application is higher.
- It provides a high amount of security as data communication is a line of sight (LOS). Moreover li-fi signal covers low region does not pass through the walls. This will avoid unwanted access to li-fi signal by unauthorized persons.
- Li-Fi consumes low power.
- It uses optical spectrum and hence avoids already crowded RF spectrum.
- Li-Fi system don’t harm your health and operates on optical spectrum.
- There is a great amount of energy reduction in lighting industry which uses Li-Fi based devices.
- It is easy to install.
- Internet can not be used with out a light source. this might limit the locations and situations during which Li-Fi may be used.
- Li-Fi uses visible light & these light cannot pass through the walls.
- Other sources of sunshine could interfere with the signal. one of the most important potential drawbacks is that the interception of signals outdoors.
- Complete new infrastructure has to be constructed for the usage of Li-fi.
- Dense urban environments
- Cellular communication
- Localized advertising
- Augmented reality
- Electro-magnetic field intensity sensitive environments
- Under water communication