5G Infra Challenges That LiFi (Light Communication) Solves & Its Core Benefits

5G Infra Challenges That LiFi (Light Communication) Solves & Its Core Benefits

5G Infra Challenges

At present, global internet traffic is projected to grow by 24% every year. The Internet has become the cornerstone of all major industries in the 21st Century. From entertainment to national economies, the internet is now a dominating force behind them all. With internet users growing by the minute, comes the great challenge of ensuring faster speeds and higher bandwidths. 5G, the next wireless revolution, comes as a solution that can cater to the endlessly growing base of users. But to build up the 5G Infrastructure, the small cells are required to be deployed within the cities at every 150-200 metres for ubiquitous coverage. And to provide high capacity backhaul connectivity to small cells, Fibre-optic cables are required. While Fiber-optic cables are capable of supporting this demand, it can also lead to severe logistical and deployment complications; in simple terms, digging trenches in every street of every city is impractical when you think of the time and cost it involves. On the other hand, there’s an RF-based wireless backhaul solution which doesn’t face the same issues as Fibre-optic cables. Let’s find out the 5G Infra Challenges:

  • Not Enough Capacity

The backhaul capacity must not constrain the small cell capacity. Thus, the backhaul capacity should be able to support the busy hour traffic and have enough margin to cover its future growth. In wireless backhaul, the available bandwidth, share of radio resources and modulation scheme impact the backhaul capacity.

  • Cost Is Too High

Backhaul contributes to a significant portion of the overall small cell cost and thus backhaul cost reduction becomes a priority. For wireless backhaul cost, the main contributors are cell site router, power connection per site, installation cost, frequency engineering and maintenance and management costs per link.

  • Deployment Becomes A Challenge

From an implementation perspective, small cell backhaul at street levels is more challenging and expensive than providing microcell backhauling at rooftops or GBTs (Ground-based towers). This is because it is difficult to reach street levels using inexpensive LOS links.

Also read: Light Communication as a part of 5G and beyond

Benefits of LiFi

Spectral Efficiency under RF-based technologies is an inherent trait that can’t be improved but only optimised via proper planning and utilization of telecom infrastructure. But LiFi (Light Communication) brings a world of possibilities along with it.

The world of wireless data communication is witnessing a paradigm shift and LiFi (Light Communication) is spearheading the change.

Other than solving the previously mentioned challenges, it offers a few unique benefits:

  • Unlicensed & Unlimited Spectrum

Using 780 Thz, unlicensed spectrum of light, LiFi (Light Communication) enables multi-gig fibre like-speed wirelessly, seamlessly. Potentially 1,000 times more than traditional wireless communication channels.

  • Low Costs

When combined with Fiber, LiFi (Light Communication) has the potential to offer a low-cost solution for fixed infrastructures while offerings speed which, with time, can possibly be 10 times faster than traditional channels.

  • Faster Time To Market

LiFi (Light Communication), as a setup, is easier and faster to deploy as it doesn’t require ROW permissions, making it simpler to implement.

  • Ubiquitous Coverage

LiFi (Light Communication) can extend fibre wirelessly throughout cities while delivering Gbps speeds in remote and difficult-to-reach areas.

Know how LiFi works

Real life Usage of LiFi

Real life uses of lifi

Real life usage of LiFi

In the era of overcrowded (data communication) world, LiFi is a new way of wireless communication that uses LED lights to transmit data wirelessly. The transmission of data is one among the foremost necessary day to day activities in the fast-growing world. The current wireless networks that connect us to the Internet become terribly slow once multiple devices are connected. Also with the rise in the number of devices that access the Internet, the availability of fixed bandwidth makes it much more difficult to enjoy high data transfer rates and to connect a secure network. Radio waves are simply a small part of the electromagnetic spectrum available for data transfer. LiFi has got a much broader spectrum for transmission compared to conventional methods of wireless communications that rely on radio waves. The basic ideology behind this technology is that the data can be transferred through LED light by varying light intensities faster than what the human eye can perceive. This technology uses a section of the electromagnetic spectrum that’s still not greatly utilized-The Visible Spectrum, instead of Gigahertz radio waves for data transfer.

LiFi is a powerful technology that can revolutionize the world of wireless communication. Many organizations and universities have started working on the research and development of LiFi. Few are working in the industry to run pilot projects on utilizing this technology. LiFi is a secure, faster and safer medium which when put into action will successfully fill the gaps in wireless data transmission created by Wifi.

LiFi applications are diverse due to their key characteristics, like energy efficiency, directional lighting, intrinsic security, high data rate capability, signal blocking by walls and integrated networking capability. Following are some examples of real-life usage of LiFi:

Dense urban environments

Dense urban environments by their nature tend to own complete artificial lighting coverage. This lighting infrastructure will give the available high data rate access to users as they move through that setting. For instance, exhibitions, conferences, seminars, airports, etc where a number of users can download, send and receive data at a high speed. Moreover, high-speed wireless communication would be available in each room as the light waves won’t propagate through walls, resulting in interference-free wireless communication.

Underwater communication

Traditional Wi-Fi can’t be used underwater since radio waves get absorbed by the water. LiFi, on the other hand, uses light for data transmission. As visible light could penetrate deep into the water, LiFi can be used for underwater communication and will potentially change the way underwater vehicles and drivers communicate with each other.

Also read: Is light communication technology capable of overcoming the future technology problems 


Augmented reality

Augmented reality is being employed in establishments like museums to reinforce the client experience. However, like many other services that are dependent upon Wi-Fi, the experience can be slow and sluggish as the number of people connected on the network increases.

LiFi can easily solve this problem by providing each exhibit with its own data stream using a Led Powered light bulb.

Aviation Industry

LiFi has great potential to revolutionize the aviation industry. Firstly it will solve the ‘congestion’ issues at airports and aircraft interiors, enabling people to enjoy seamless data streaming/ downloading. Secondly, as it does not interfere with radio frequency devices, it can be safely used in airline cabins.

Hospitals & Healthcare

LiFi can also be safely used in many hospital applications like real-time monitoring and details of patient movement, to check the actual status of the prescriptions by patients on their smartphones, etc. without the need of wires.


In a meeting room environment, the access area of every channel is the width of the light pool, which can be accessed by multiple users. Each user will receive higher data rates than would be the case for an equivalent Wi-Fi channel. In the case of Wi-Fi, every user or cluster of users directly competes for access to bandwidth. The internet result is that the more the number of connections, the slower the download speeds are for all. In contrast, LiFi, with its greater number of available access points, each pool of light provides full channel data rates with fewer simultaneous users. Additionally, the light does not pass through the walls. Therefore, with the least precautions to avoid leakage from windows, etc., security is fundamentally enhanced as compared with Wi-Fi.

Hazardous Environment

The use of cell-phones is prohibited in places having dangerous explosive environments. The transmission of data using LiFi will simplify network configuration in such environments. Using LiFi’s new modes of securing such environments from potential hazards may also be developed and can enable new systems to enhance security in these environments.

Want to know more about LiFi? Stay tuned as we bring all the updates to you and if you have any queries with regards to LiFi, we will be happy to solve it. Share your query with us at info@velmenni.com.

Busting Common Myths About LiFi

Busting common myths about lifi

Busting myths about Lifi

The future of wireless communication — LiFi, stands for light fidelity. It’s a technology that enables faster data transfer with the help of visible light. Since LiFi is still an emerging science, many people are curious to know if it is really capable of solving the problem of the spectrum crunch. It, thus, becomes important for us to debunk certain myths and to clear out the misconceptions around LiFi in an effective manner.

Here are a few queries that pop up every now and then when we talk about LiFi:

Myth 1: LiFi is just another name for Visible Light Communication (VLC).

Fact: The method of transmitting data using LEDs makes the main objective of both the technologies — LiFi and VLC, common. However, VLC is a point to point light communication network with controlled features, operated at low or moderate data rates, unlike LiFi that supports high to ultra-high data rates. Moreover, LiFi is bidirectional and VLC is unidirectional.

Myth 2: Lights cannot be dimmed if you wish to use LiFi efficiently.

Fact: By dimming the lights, your room might get dark but the LiFi will still work and transmit your data. LiFi dongle is sensitive to low lights and even the minimum level of luminescence can get this technology working, so you won’t be able to notice that the light is switched on.

While working at home or in office, we usually switch on the lights so that our laptop screens or whatever work we are doing, don’t stress out our optical nerves. To use LiFi, you just need lights. LiFi’s smooth transmission service comes for free as the cost gets covered in the price of light only. In short, you just pay for illumination, but avail the benefit of communication too! Can it get more efficient than this?

Also read: Real life usage of LiFi


Myth 3: The lights flicker a lot which can cause a headache.

Fact: The current supply to the LED devices is modulated at a speed that is not perceptible to the human eyes. The flickering won’t cause headaches as it won’t affect us. Even TV and computer screens flicker but the human eyes fail to detect it, and the same goes for LiFi. So, take it easy!

Myth 4: LiFi is unidirectional.

Fact: LiFi can be used in both the directions as it is a full duplex communication technology that uses infrared energy (which is invisible to human eyes) for the uplink and visible light for the downlink.

Myth 5: LiFi cannot work in sunlight.

Fact: Many people think that LiFi cannot work in the presence of sunlight which might affect the speed of LiFi. Surprisingly, it is easy to reduce the interference from natural or artificial sources using optical filters that help in minimizing receiver saturation, enabling LiFi to work even outdoors. Moreover, analog and digital filtering can further help in reducing the interference making it almost negligible.

And as I mentioned earlier that LiFi technology modulates the light at very high rates without even making us feel the difference, the sunlight — being a constant source of light, can be filtered out at the receiver.

Myth 6: LiFi requires ‘Line-Of-Sight’.

Fact: Undoubtedly, the signal would be stronger in the presence of line-of-sight but, if a LiFi receiver can collect photons, it can still receive data at a lower data rate if light levels are low. This means that line-of-sight is an advantage for sure, but not a necessity. Light can be reflected but cannot penetrate through physical objects like walls which provides a secure data network, limiting the coverage area. But the case is same with WiFi as its speed also decreases when radio waves come in contact with interference.

Myth 7: LiFi needs special LEDs to work properly.

Fact: The LED lights and ordinary lamps currently being sold can perfectly work to provide light communication based on factors defining illumination. The invention of upgraded versions is a win-win situation, but the lighting industry may reach to that level in recent coming years and to implement LiFi, the existing LED devices can be used easily.

Myth 8: LiFi is a complex technology and cannot work with WiFi.

Fact: This is one of the biggest misunderstandings people have about LiFi. LiFi, in fact, is a very simple technology that works on direct modulation and direct demodulation mechanism. It is a cheap and highly efficient way of communication as it comes with the source of illumination. On the contrary, radio technology is complex since it requires a whole setup along with an antenna system to transmit signals.

It’s believed that LiFi will very soon take over WiFi totally. However, both the technologies can coexist amicably. LiFi can help reduce the congestion and burden of WiFi by providing a higher speed while downloading data.

Still got doubts about LiFi? Share with us your queries at info@velmenni.com and we’ll try to solve them all!

LiFi: The Future of Wireless Communication

What is LiFi

What is LiFi?

We’re living in a time when technologies are proliferating in every sector and smart inventions are at an all-time high. The demand for wireless networks that can meet the never-ending need for data communication is growing exponentially. With the emergence of new advancements such as the Internet of Things and 5G, the world needs a more convenient and faster way of communicating data, one that is away from the Radio Frequency Spectrum. Let’s talk about WiFi vs LiFi:


The youngest of the crowd today know that we access the internet via WiFi, more so, it even serves as a tactical marketing approach to attract customers across industries — broadly retail, hospitality, and the F&B domains. WiFi might as well be deemed critical to routines of large markets and household lifestyles around the world.

Here’s the problem — the number of internet users in the world is growing too fast too soon.

Today, Wifi carries over 60% of the world’s internet traffic.

Since Wifi uses Radio Frequency as a medium to commute data, it already interferes with electronic appliances and regular installations that slow down the transfer. But with such great load of data and growing users, the eventual outcome is congestion and choking of bandwidth in the available RF spectrum.

facts velmenni

Needless to say, the number of internet users also goes up by the second. The way we access the internet is on the cusp of changing forever.


The world is being introduced to an entirely new technology; a confluence between two of man’s greatest inventions in recent centuries — Light and the Internet.

The future of wireless communication — LiFi, stands for light fidelity. It’s an emerging technology that enables faster data transfer with the help of visible light. And since it is independent of congested radio frequencies and interference from electromagnetic waves, it is capable of chasing 10 times the speed of current day data communication, through illumination. Interesting, isn’t it?

Also read: Busting Common Myths about LiFi


The simplicity of how LiFi works and how easy it is to retrofit light sources around the globe is what makes LiFi the ultimate alternative to WiFi. And since it transmits data via 1000 times more unlicensed and free spectrum of light, LiFi becomes complementary to all existing, coming-to-be and future technologies and inventions. Hence, resolving the crucial conundrum we face with WiFi in the present day — availability of bandwidth and potential of speed.

Why you should look forward to LiFi?

LiFi comes across as the optimum solution when it comes to data’s security. Since light cannot trespass the physical environment, LiFi enables a secure data passage keeping the privacy intact.

LiFi technology is environment-friendly and cost-effective. It requires visible light to transmit data and needs fewer components as compared to radio technology. Thus, LiFi is cheaper than WiFi and surely has the potential to take over the wireless communication market in near future.

What’s more fascinating is the magnitude of its application.

For starters, LiFi can help reintroduce indoor and outdoor light sources as the base for numerous IoT applications across enterprise/industrial environments and smart cities. The technology will also liberate hospitals, heavy industries, and educational institutions through safer and secure connectivity with no electromagnetic interferences whatsoever.

Apart from these domains, LiFi can be leveraged to power in-flight entertainment systems through Wireless Communication by simply using the wall/reading lamps. I think it’s safe to say that this technology’s areas of application are interminable.

This was nothing more than just a datum from the mega pool of discoveries and related inventions that are coming to be in the world of optical wireless communication. LiFi is one such discovery.

Got any questions related to LiFi? Put them down in the comments below.

I’d be happy to answer.