LiFi is a wireless optical networking technology that uses light to transmit data instead of radio waves. It works just like wi-fi, the source of light acts as a modem or a transmitter and it provides the benefit of data transmission in the area under its light.
Here the light pulses with high frequencies are emitted by the light source which is not visible to the naked eye. LiFi technology is so powerful that it can provide the data transfer speed that is much higher than the normal wi-fi as the light has much shorter wavelengths than the radio frequencies. It can easily provide data transfer speed of 100 Mbps. It is perfect for offices where high-speed data is required to carry out the work. Also, all the data remains highly secured as it is limited to line of sight between the LED source and the device transceiver.
Li-Fi system has a light emitter which is a type of LED transmitter on one hand & a photo-detector which is a type of a light sensor on the other. The data is encoded through the LED transmitter in the form of light. The rate of on & off the activity of the LED transmitter that cannot be seen by the human eye as the flickering rate is very high transfer data transmission at very high speed. The receiver on another end receives these flickering signals in the form of 1’s & 0’s decode them and transform them into useful information. This data is then displayed to the user.
Differences between Li-Fi & Wi-Fi:
The Differences between Li-Fi and Wi-Fi include the following.
- The data transfer speed of Li-Fi is much faster than Wi-Fi
- The Li-Fi has a low range in comparison to Wi-Fi
- Li-Fi is much more secured than Wi-Fi technology.
- Li-Fi needs power all the time.
- The ecological impact of Li-Fi is very low in comparison to Wi-Fi.
- The cost of Wi-Fi is higher than Li-Fi.
Advantages of Li-Fi:
- Its speed is extremely high.
- It is more protected from a security point of view
- Any type of hacking is not possible.
- No Radiation & Harmless light waves.
- Consistent data transfer speed.
Disadvantages of Li-Fi:
- LiFi requires LOS (line of sight). Any obstruction in the light of sight will stop the data transmission.
- Any interference of external light source like an electric bulb, LED light or natural sunlight can cause an interruption in the transmission.
- Li-Fi also doesn’t work in dim areas.
Li-Fi Technology Applications:
Li-Fi technology can be useful in the following areas:
- Medical Applications
- Underwater Communication
- Lighting System
- Dangerous & Sensitive Environment
- Traffic & Transportation Management