What is Light Fidelity (Li-Fi)

What is Light Fidelity (Li-Fi)?

Li-Fi stands for Light Fidelity, a visible light communication (VLC) system that uses light to transmit wireless data embedded in a beam. Li-Fi enabled devices to convert light rays into electrical signals. The signal is then converted to data. The term was coined by German physicist Harald Haas during a 2011 TED Talk. He envisioned using the bulb as a wireless router.

LiFi bulbs are equipped with a chip that slightly modulates the light for optical data transmission. LiFi data is transmitted by a home LED bulb and received by a photoreceptor. When meticulously implemented, Li-Fi systems can reach up to 100 times (1 Gbit/s or more) transmission speeds over current traditional Wi-Fi operating in the air.

Working of Light Fidelity (Li-Fi)

The LED bulb is invisible to the human eye and can be adjusted up and down very quickly. Small changes/pulses in the rapid dimming of LED bulbs are converted into electrical signals by a “receiver”. The signal is then converted into a binary data stream and recognized as a web, video, and audio application running on internet-enabled devices.

Advantages and Disadvantages of Light Fidelity (Li-Fi) Compared To Wi-Fi

Advantages of Light Fidelity (Li-Fi)

The most amazing feature of Li-Fi, unlike Wi-Fi, is that Li-Fi does not interfere with the radio signal, which makes it even more advantageous in terms of internet speed where both Li-Fi and Wi-Fi are used. Become. Wi-Fi is interfering with a nearby access point (router). Needless to say, the incredible speed of Li-Fi over Wi-Fi.

Li-Fi is more secure, the light is blocked by the wall, which enhances privacy and makes data transfer more secure. In the case of Wi-Fi, the network has a large reach and can’t block radio frequency signals with a wall, which makes it prone to hacking. That is, it is difficult for neighbors to access the Internet without paying.

Disadvantages of Light Fidelity (Li-Fi)

The coverage distance for Li-Fi is 10 meters, but for Wi-Fi systems, it is 32 meters.

Li-Fi technology can’t be deployed in sunlight or in unstable outdoor conditions, so it’s unlikely that it will work in the dark without an LED bulb. Moreover, the added brightness of more LEDs already added to the time we spend viewing the screen isn’t very good for our eyes, especially if these LEDs are never technically turned off. Internet service may not be available if there is a wall between the light and the LiFi receiver.

Applications of Light Fidelity (Li-Fi)

1. Light Fidelity (Li-Fi) In Military

The application range of Li-Fi can be limited to bright places such as tents. Therefore, under certain light, it may limit access to sensitive information in places where mobile phones cannot be used, such as ammunition dumps.

2. Light Fidelity (Li-Fi) For Underwater Communication

An underwater internet connection is what sets Wi-Fi and Li-Fi apart. Unlike the Wi-Fi radio signal being swallowed by water, light can travel in water. This can change the way underwater vehicles communicate with each other.

3. Light Fidelity (Li-Fi) In the Internet of Things (IoT)

Due to its tremendous speed, Li-Fi can have a significant impact on the Internet of Things. Higher levels of data transfer allow more Internet-enabled devices to connect to each other.

4. Light Fidelity (Li-Fi) In Street Light

Cities can undoubtedly benefit from Li-Fi-enabled street lights to provide internet access to mobile phones. This public internet access also helps tourists by making it safer to return home at night and providing local information.

5. Light Fidelity (Li-Fi) for Inter-vehicle communication

You can attach Li-Fi-compatible LED bulbs to your car’s headlights and rear lights. This enables inter-vehicle communication.

6. Light Fidelity (Li-Fi) In Security

Li-Fi has a shorter range than Wi-Fi and is, therefore, safer than Wi-Fi. This is because the shorter the range, the less likely it is for malicious interception within the data stream. This is very useful in industries that handle large amounts of sensitive data, such as healthcare.

7. Light Fidelity (Li-Fi) In Traffic Light

The LED bulb of the traffic light can provide the driver with weather conditions and traffic information while the driver is waiting at the traffic light.

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