Visible Light Communication (VLC) is a wireless communication technology that uses visible light for data transfer. VLC is also known as Li-Fi, which stands for Light Fidelity. Li-Fi technology uses the visible light spectrum to transmit data, which is much faster than traditional Wi-Fi. VLC has been receiving a lot of attention from researchers, developers, and businesses due to its potential advantages over conventional wireless communication technologies. This article will discuss everything you need to know about Visible Light Communication.

Introduction to Visible Light Communication

Visible Light Communication is a technology that uses visible light to transmit data. It is a type of optical wireless communication technology that can provide high-speed data transfer. The concept of Visible Light Communication was first introduced by Professor Harald Haas of the University of Edinburgh during his TED Global Talk in 2011. Haas demonstrated that LED lights could be used to transmit data at a speed of up to 10 Gbps.

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How Does Visible Light Communication Work?

Visible Light Communication works by using LED lights to transmit data. The LED light is modulated at a high frequency, which carries the data. The modulated light is then received by a photodetector, which converts the light into an electrical signal. The electrical signal is then decoded by a receiver to retrieve the original data. The speed of data transfer in VLC depends on the modulation scheme used and the type of LED lights used.

Advantages of Visible Light Communication

High-Speed Data Transfer

One of the main advantages of Visible Light Communication is its ability to provide high-speed data transfer. VLC can provide data transfer rates of up to 10 Gbps, which is much faster than traditional Wi-Fi. This makes VLC an attractive option for applications that require high-speed data transfer, such as video streaming, virtual reality, and gaming.

Security

VLC provides a higher level of security compared to traditional wireless communication technologies. Visible light cannot penetrate walls, making it difficult for unauthorized users to access the network. This makes VLC ideal for applications that require high levels of security, such as military and government networks.

No Interference

VLC does not interfere with radio frequencies, making it an ideal option for use in environments where radio interference is a concern, such as hospitals and airplanes.

Energy Efficiency

VLC is an energy-efficient technology that can reduce energy consumption. LED lights are already widely used for lighting, and VLC can use the same infrastructure to provide wireless communication. This makes VLC a cost-effective option for businesses and organizations.

Applications of Visible Light Communication

Indoor Navigation

VLC can be used for indoor navigation in places such as museums, airports, and hospitals. The LED lights can be used as beacons to provide location information to users.

Smart Lighting

VLC can be used for smart lighting systems. The LED lights can be used to provide wireless communication as well as lighting. This can reduce the cost of installing separate infrastructure for wireless communication.

Li-Fi Hotspots

VLC can be used to provide Li-Fi hotspots in public places such as libraries, coffee shops, and airports. This can provide high-speed internet access to users without the need for traditional Wi-Fi.

Underwater Communication

VLC can be used for underwater communication. Water is transparent to visible light, making VLC an ideal option for underwater communication.

Challenges of Visible Light Communication

Limited Range

VLC has a limited range compared to traditional wireless communication technologies. The range of VLC depends on the type of LED lights used and the environment in which it is used.

Line of Sight

VLC requires a line of sight between the transmitter and the receiver. The signal cannot be transmitted through obstacles such as walls, which can limit its use in certain environments.

Lighting Constraints

VLC requires the use of LED lights, which can be a constraint in certain environments. For example, in environments where dim lighting is required, VLC may not be suitable.

Interference from Ambient Light

VLC signals can be affected by ambient light. Sunlight, fluorescent lights, and other sources of light can interfere with the signal, which can result in errors in data transfer.

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Regional Analysis 

The global visible light communication market can be distinguished on the basis of application, verticals, component, and region.

On the basis of application, the worldwide visible light communication market can be distinguished into underwater communications, smart lighting, location-based services, indoor applications, outdoor application, and others.

On the basis of verticals, the worldwide visible light communication market can be distinguished into transportation, aviation, automotive, defense, healthcare, and others. 

On the basis of component, the worldwide visible light communication market can be distinguished into visible light LED’s, opto–couplers, image sensors, diode, R emitters, and others. 

On the basis of region, the worldwide visible light communication market can be distinguished into Asia Pacific, Europe, North America, and the Rest of the World (RoW). 

Regional Analysis 

The global market for visible light communication is projected to expand significantly during the forecast period. Regions such as Asia-Pacific, Europe, North America, and the Rest of the World (RoW) have been thoroughly evaluated. As per the study, the global market is estimated to be dominated by North America. The most consequential factor of regional expansion is augmenting internet penetration. Besides, the burgeoning technical development is likely to fuel the market additionally. The report also highlights the role of increasing adoption of IT services which is further steering the global 3D scanner market.

Further, the increasing applications of indoor location-based services are projected to fuel the market during the assessment period. It is to be emphasized here that the region has been investing in making a massive investment in research and development. Also, the presence of established vendors is another imperative factor resulting in market growth. 

However, market dynamics are estimated to change due to the spread of coronavirus. Several regions had observed lockdown on a national basis which caused a change in the supply and manufacturing process. 

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Conclusion

Visible Light Communication is an emerging technology that has the potential to revolutionize the way we transfer data wirelessly. It provides high-speed data transfer, increased security, and energy efficiency. VLC has a wide range of applications, including indoor navigation, smart lighting, and underwater communication. Despite its advantages, VLC also faces some challenges, such as limited range and lighting constraints. Overall, Visible Light Communication is a promising technology that is worth keeping an eye on in the coming years.

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