Li-Fi is now Wi-Fi alternative– Suppose the light is on in your room. What would it be like if the internet would work only in that place wherever the light’s rays fall? Yes, that’s it, Li-Fi technology.
The technology of data transfer through light rays is called Li-Fi i.e. Light Fidelity technology. It is a wireless internet technology, which is transmitted by light rays.
Today we are giving information about what is Li-Fi technology, why and in what ways Li-Fi technology is different from Wi-Fi technology, why it is needed, how it can be used.
Generally speaking, Li-Fi is a wireless communication technology that transmits data using light. Internet is also a medium of data transfer. The Wi-Fi we use is based on radio waves. In other words, data transmission is possible due to radio waves in Wi-Fi.
However, radio waves have some limitations. After going to a point, the speed of the radio wave stops. In the changing times, as our needs increase, high speed internet speed is required. There is an argument of the scholars that it will be supplemented by Li-Fi technology.
FAQ
History of Li-Fi Technology
Li-Fi technology was first proposed by Professor Harold Haas in 2011. Since then, as a possible alternative to Wi-Fi, many people have focused on Li-Fi technology.
How does Li-Fi technology work?
Just as a router, fiber cable or other devices are needed to use the Internet through Wi-Fi technology, in the same way, various devices are needed in Li-Fi technology.
Source of light
There should be a light source in the room or in the place where internet is provided. Especially LED light is used as a light source. This light is modulated at a higher frequency, which allows data to be transferred.
Data Encoding
The data to be transferred is encoded into a modified light signal. Methods like on-off keying (OOK), frequency shift keying (FSK) or phase shift keying (PSK) are used to encode data.
Transmission
After the data is encoded as a modified light signal, it is transmitted from the LED light source. Then the signal is received by the photodetector. A photodetector is a device that has the ability to detect light rays with data.
Decoding
The received modified light signal is converted into original data by the photodetector. In this decoding process, there are various signal processing processes. So that the received signal can be converted into original data.
Data processing
After the data is decoded, the processed data is delivered to the respective device. During data processing, there is work to correct the weaknesses in the data, decryption or other types of data manipulation.
Receive
Only if all the above processes are completed, the respective device will be connected to the Internet. After that, you can get the same internet experience as when you connect to Wi-Fi in a normal way. And data is transmitted at high speed using the light beam from the LED light.
Why is Li-Fi technology important?
As mentioned above, Internet connection is possible wherever the light coming from the LED used in Li-Fi is located. It means that if you do not let the light rays coming from the LED light go outside the room, the internet will not work outside. Because the internet is available only in a limited area, the Internet speed of Li-Fi technology is higher than that of Wi-Fi.
Advantages of Li-Fi technology
Although Wi-Fi technology is used by many people, it has some limitations and weaknesses. As a result, the Wi-Fi alternative has been sought. The most important feature of Li-Fi is speed.
Tests have shown that the average Internet speed of Li-Fi is 100 times higher than the average speed of Wi-Fi. Li-Fi technology offers the following benefits:
Security
Compared to Wi-Fi, Li-Fi technology is considered very safe and reliable. Since the light beam coming from the LED light does not go beyond the wall, it prevents unauthorized access to the network.
Radiation
However, it is said that the radiation coming from Wi-Fi does not affect human health that much. However, even if it is a small amount, the negative effects of the radiation coming from it are many. As Li-Fi technology does not emit harmful electromagnetic radiation, it does not have a negative impact on health.
Range
Li-Fi technology works only within a limited range. It means that wherever the light beam coming from the LED light reaches, the internet runs only there. Therefore, Li-Fi technology is suitable for small places like home or office.
Reliable
Since Li-Fi technology operates on a different frequency band than Wi-Fi, the possibility is less. As a result, the obstacles in Wi-Fi like Wi-Fi are reduced.
Biological effect
Compared to Wi-Fi, Li-Fi technology has less impact on the environment. Especially since it does not involve radio waves, it causes less disturbance to wildlife or ecosystems.
Fast data transfer rate
Compared to Wi-Fi, the rate of data transfer is faster in Li-Fi.
More bandwidth
Li-Fi has more bandwidth than Wi-Fi. Because the bandwidth of radio waves is many times more than the bandwidth of visible light.
Despite various advantages, there are some disadvantages of Li-Fi technology. Especially since data is transmitted through visible light, we have to spend a lot of time under the light beam of LED light. Apart from that, Li-Fi technology has various disadvantages.
Limited range
Li-Fi technology can operate only within a limited area. The Li-Fi technology in one room of the house may not work in another room on the same floor of the same house. Because the LED light must have reached the other room for internet connection.
Line-of-straight connection
Li-Fi technology requires a line-of-straight connection. This means that the transmitter and receiver must be on the same line. As a result, there is a high possibility that the walls of the house or other furniture will interfere.
Light from other sources can have an effect
If light from other sources, especially sunlight or any other light, disturbs the room with Li-Fi technology. As a result, data transmission may be interrupted. Therefore, Li-Fi is sensitive to light from other sources. Not only light, but also fog, smoke or dust can affect Li-Fi.
Cost
Li-Fi is a new type of technology. This connection costs more than Wi-Fi.
Utility of Li-Fi
Li-Fi technology can be used not only in home or office but also in various other research work. In particular, Li-Fi technology can be used to explore things in the sea. Because light can also travel through water.
Similarly, Li-Fi technology is used in various surgeries. Also, it is said that Li-Fi technology can be used in air services. Similarly, Li-Fi technology plays an important role in exploring new things.
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