The Li-Fi (light fidelity) technology was proposed by the German Scientist namely Harald Haas. The main function of this technology is to transmit the data via light. This technology is idyllic for high-speed wireless communication in a restricted region, and it offers many benefits over Wi-Fi technology such as high bandwidth, ease of use, efficiency, and safety.
What is LiFi Technology?
Li-Fi-light fidelity is similar to Wi-Fi technology and it is one of the future wireless communication technologies. The main feature of this technology includes fully networked, bidirectional and high-speed wireless. Nowadays, the most trending domain in wireless communication is Wi-Fi and internet users are also being increased every year. For obtaining better speed, efficiency, bandwidth, Li-Fi technology has evolved. The data transmission in this technology can be done using light because the light intensity changes quicker than the human eye for capturing. The range of data transmission in L-Fi is faster 100 times than Wi-Fi.
the Li-Fi system mainly includes two parts namely the transmitter and receiver. The input signal at the transmitter section can be modulated with a specific time period then send the data using LED bulbs in 0’s and 1’s form. Here, the flashes of LED bulbs are denoted with 0’s and 1’s. At the receiver end, a photodiode is used to receive the LED flashes strengthens the signal & gives the output.
The block diagram of the Li-Fi system is shown below, and the transmitter section includes the input, timer circuit, an LED bulb. The input of the transmitter can be any kind of data like text, voice, etc. The timer circuit in this section is used to provide the necessary time intervals among every bit, and these are transmitted to the receiver end in the form of LED flashes.
Differences between Li-Fi & Wi-Fi
- The Bandwidth Expansion of Wi-Fi technology is limited and exceptional for Li-Fi
- The Speed of the Wi-Fi is150 Mbps and >10 Gbps for Li-Fi
- The Data Density of Wi-Fi technology is low and high for Li-Fi
- The Range of Wi-Fi is medium and low for Li-Fi
- The Security of Wi-Fi is medium and excellent for Li-Fi
- The power availability of Wi-Fi is low and high for Li-Fi
- The ecological impact of Wi-Fi is medium and low for Li-Fi
- The cost of the Wi-Fi is medium and low for Li-Fi
- The network topologies of Li-Fi and Wi-Fi technologies is a point to point
Li-Fi Technology Applications
The Li-Fi router applications over Wi-Fi are promising as well as unlimited for wireless communication which includes the following.
- Traffic Management & Road Safety
- Medical Applications
- Aviation
- Communication Underwater
- Elegant Lighting
- Interior map-reading system for blind people
- In dangerous Environments or In Sensitive regions
- Transportations
- Industrial Areas
At present, the concept of Li-Fi technology is attracting a lot of wireless internet users due to its genuine features. Further, it can be explored for laptops; gadgets which can be transmitted through the light in the room by using Li-Fi.
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