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As often happens every time a new technology appears, there is a lot of noise about the old dying to give way to the new. There is increasing noise about Li-Fi and Wi-Fi slugging it out and the latter giving way. not a lot of it seems to hold water, though, and I will tell you why.
Li-Fi is a relatively new wireless communication technology that uses visible light, ultraviolet, and infrared spectrums to transmit data at high speeds. Unlike Wi-Fi, which uses radio waves for data transmission, Li-Fi uses LED lamps to modulate the intensity of light to transmit binary data. Li-Fi has the potential to be faster and more secure than Wi-Fi, but it has some limitations such as the need for direct line-of-sight communication and the inability to penetrate walls.
- How does Li-Fi work?
- What are the advantages of Li-Fi over Wi-Fi
- What are the limitations of Li-Fi?
- Choosing Between Li-Fi and Wi-Fi
How does Li-Fi work?
Li-Fi works by using LED lamps to transmit data through the modulation of light. The LED lamps are turned on and off at a very high speed, faster than the human eye can detect, to transmit binary data. A receiver, such as a photodiode, detects the changes in light intensity and converts them back into binary data. This process is similar to how a modem converts digital signals into analog signals for transmission over telephone lines.
The data transmission is typically done using the visible light spectrum, but it can also use ultraviolet or infrared light. Li-Fi has the potential to be faster and more secure than Wi-Fi, but it requires direct line-of-sight communication and cannot penetrate walls.
What are the advantages of Li-Fi over Wi-Fi
Li-Fi has several advantages over Wi-Fi, including:
- Speed : Li-Fi can transmit data at much higher speeds than Wi-Fi, up to 100 times faster, due to the higher bandwidth found in the light spectrum.
- Security : Li-Fi is more secure than Wi-Fi because the data transmission is limited to the area where the light is present. Unlike Wi-Fi, which can be intercepted by anyone within range of the signal, Li-Fi requires direct line-of-sight communication.
- Energy efficiency : Li-Fi is more energy-efficient than Wi-Fi because it uses LED lamps, which consume less power than Wi-Fi radio transmitters.
- No electromagnetic interference : Li-Fi does not create electromagnetic interference , which can be a concern in some sensitive environments such as hospitals or airplanes. Also, it is less prone to interference from other devices because it uses light, which does not interfere with radio frequencies.
What are the limitations of Li-Fi?
Li-Fi has some weaknesses that limit its widespread adoption. These include:
- Line-of-sight communication : Li-Fi requires direct line-of-sight communication between the transmitter and receiver, which means that obstacles such as walls or other physical barriers can block the signal.
- Limited range : Li-Fi has a limited range due to the fact that light cannot penetrate walls or other solid objects. This means that the signal is confined to a single room or area.
- Light source reliance : Li-Fi requires a light source to function, which means that it cannot be used in areas without adequate lighting.
- Interference from ambient light : Li-Fi can be affected by ambient light, such as sunlight or other light sources, which can interfere with the signal.
Choosing Between Li-Fi and Wi-Fi
Yes, Li-Fi is much faster than Wi-Fi, but I do not think that Li-Fi will replace Wi-Fi. All the hullabaloo about it doing so flies in the face of the limitations of the new technology.
For example, the fact that it requires line-of-sigh communication and cannot penetrate walls is a huge problem. Who wants to go back to the days of lining up two devices to share Internet or files like it used to be back when infra-red was the primary means of wireless communication between two cell phones? Not me.
Also, other light sources in the environment can interfere with it. No way. This is not how we want our wireless communication to work. We want to be able to connect regardless of what direction we face and what kind of light bulbs we have on in the home, at the office, or at a rock concert.
The IEEE standards organisation has released the standard that covers Li-Fi, so we are going to be seeing this new technology deployed in certain use cases. Li-Fi and Wi-Fi will exist side-by-side, serving different segments and users. Whatever it is that will eventually replace Wi-Fi, it sure isn’t Li-Fi. .
Author:Mister Mobility
Digital Skills and Communication Coach | Mobile Phone Connoisseur since 2001 | Tech Blogging since 2004
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As a student, having a reliable phone is essential. Whether it is to stay connected with friends and family, keep track of your schedule, or work on assignments, a mobile device is important. However, when on a budget, it can be hard to tell what to consider when choosing a phone. If you find yourself in this position, make sure to keep reading as we go over useful tips on how to spot the best phone, even when on a budget.
- 6 Things Should You Should Note When Getting a Phone as a Student Battery Life Storage Space Speed Camera Quality Screen Size Price
- In Conclusion
6 Things Should You Should Note When Getting a Phone as a Student
With so many options in the market, it can be hard to know where to start. So, to help, here are six things to look out for when searching for the best phone for students:
- Battery Life
- Storage Space
- Speed
- Camera Quality
- Screen Size
- Price
Battery Life
When you’re a student, it means you are always on the go. Whether it is classes or personal events, you will likely have a lot of arrangements to handle, so it can help to have a phone that can keep up. A good battery life means you get to charge the phone less.
Today you can find many devices that offer full-day battery life. When trying to decide the best for you, consider how much you use your mobile device. If you only make calls, then a 4000 mAh battery should be more than sufficient. However, if you regularly connect to the internet or you don’t charge your device often, then go for a 5,000 mAh phone.
Storage Space
Another feature to look out for is the storage space. These days there are two types of phones when it comes to device space; there are those that come with additional SD card functionality and those that don’t.
If you are going to go for a phone without an SD card space, then you need to be careful about the base storage of the phone you’re buying because you won’t be able to upgrade it later. Students often use their phones to store video tutorials, e-books, along with other forms of media, which can take up a lot of space. When your mobile device has little storage left, this can affect the phone’s overall performance.
Speed
Having a slow mobile device can be a real hindrance for students. When your phone is slow, even navigating the menu can become a hassle. And with time being a luxury you can’t afford to waste, it’s crucial you consider the phone’s speed when making a purchasing decision. Three factors contribute to how fast your mobile device performs; processor, RAM, and storage.
The speed of the processor is measured in GHz, with higher values generally indicating better performance. The type and size of the RAM is also important. The LPDDR5 type will give the fastest RAM bandwidth of up to 6,400 Mbps, and with a size of about 8 GB, you should be good. Lastly, fast storage like Samsung’s UFS 4.0 chips combined with at least 256 GB of space will mean your device’s read and write speeds are very fast.
Camera Quality
A good camera means you are able to capture those special moments with ease and at excellent quality. When reviewing a phone, check out both its photo and video performance. Apple, Google, and Samsung smartphones have some of the best cameras, but there are also upcoming contenders like Xiaomi you might want to consider. It’s important to note when comparing phones that the one with more megapixels won’t necessarily produce the better image. These days it’s a combination of hardware and software, so feel free to test the phones out yourself before committing to buying one.
Students often can’t allocate enough time to do proper research into mobile devices before purchasing because they are very busy with their schoolwork. If you need some help with your studies as you shop for a proper device, you can hire a writer from Grab My Essay . With a bit of external assistance, you can keep your grades up and still get to invest your time and attention into picking a perfect smartphone.
Screen Size
The size of your phone’s screen will affect how you navigate with it and watch media. Pick a phone that you are comfortable holding. If it’s too big, then you might accidentally drop it, and if it’s too small, you won’t find it easy to swipe through the pages or type messages. Also, if your screen is small, you could strain your eyes when watching videos or reading text.
Price
Lastly, it is essential to consider the price. A student’s budget isn’t always the biggest, so you might have to make some concessions when choosing a phone. Generally, today you can get a mobile device that will meet all the requirements covered in this article for just for $500. However, if you have the money for something premium, there is no shortage of devices to choose from.
In Conclusion
Choosing the best phone when a budget can feel very confusing, especially with the number of features to consider. However, as long as you target a good battery and camera, along with suitable storage and speed, you should be able to find a phone at student-friendly prices. Happy phone hunting!
Author’s Bio
Tori Eslinger is a writer and tech enthusiast. She enjoys covering the latest trends in the mobile phone industry and sharing articles that explain them in the simplest of ways. Tori considers herself an adventurer and is constantly seeking the next thrill, whether it’s hiking or mountain climbing.
