Li-Fi (Light Fidelity)
Mian Siddique Ahmed
Associate Editor,
The Scientific Ravi
In this modern era, wireless communication has become a requisite need like water and electricity which is part of our personal as well as our professional life. When we talk about wireless communication, the first word which comes to our mind is Wi-Fi. It uses 2.4-5 GHz RF (radio frequency) to deliver internet access around a wide area. As more and more users are connected to the network, the rate of data transfer gets reduced. So when more people access wireless internet, airwaves gets clogged and it makes difficult to latch onto a reliable signal. Transmission of data is done using radio waves which is just one part of spectrum. We are totally dependent upon this very prevalent service. But it has also many
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This issue is resolved using Li-Fi as it emits no EM radiations and so there will be no interference with the monitoring equipment.
• Safe environment:
Light waves are safer than radio waves. So Li-Fi is used in those places where Wi-Fi is prohibited such as in mines and petrochemical plants. Subway stations and tunnels, commonly known as dead zones for most emergency communications will now have web access to every corner only because of Li-Fi.
• Airplanes:
Wi-Fi cannot be used efficiently in the airplanes. Li-Fi is used to limit the interference between radio frequency waves and radio of pilot. Also the passengers have to pay a huge amount of money for the "service" of dial-up speed Wi-Fi on the plane. Li-Fi could easily solve this problem. Reduction in cabling equipment leads towards lighter airplane.
• Institutions:
Now students can download teacher notes anytime from respective teacher’s blog. There will be more interaction between students with interconnectivity between hundreds of devices.
• Ocean
Isolate the Wireless LAN on a different VLAN (most commonly used) and place a firewall between this VLAN from the corporate internal network.
Party Plates Company has established the need for a new proposal with wireless technology. Team B will research some marketing tools that will assist Party Plates in meeting their goals of advancement in sales and certain goals. This proposal will focus on wireless technology that will be beneficial to the party plate business. Team B will also provide the pros and cons to these wireless technologies and justification of the choice to incorporate them into Party Plates Company. In the proposal, Team B will also include a spreadsheet presenting the equipment needed for using the technologies and the costs
Today frequency hoping, wifi, is used in phones, tablets, computers, etc. Without wifi these devices wouldn't be what we know them today as. They might not even exist. They would used for simple things such as calculations or simple games. Imagine life without the internet. Well without wifi the Internet would not exist, and the world would be a totally different place. Another thing the devices would be used for would be word processing.We could still have Word, but it might not have all the cool features it has today. For example, wouldn't exist, or wireless printing. Just think about if you had to have a printer plugged into every computer just so you could print an essay. To say the least these products wouldn't exist, or they would not be that popular without the invention of wifi.
The major advantage of Wi-Fi is the fact that users do not need to be physically connected to the network in order to access the Web and network resources. Wi-Fi provides increased mobility. Among employees, those who use a laptop will worry no more about connecting using a connection cable. They will be able to move from their office to the meeting room without losing connection. Besides eliminating much of the need for extensive wiring and dedicated workstation, Wi-Fi means the Internet is accessible anywhere users can pick up a signal, which allows for greater flexibility in office configurations. Wi-Fi systems can also be much less expensive to set up, since the main cost is in the wiring to the main router. If an existing wired Internet network is already in place, adding Wi-Fi capabilities is relatively simple, with no need to purchase a dedicated workstation. Wi-Fi systems are also relatively inexpensive to operate and easy to use. For employees and authorized visitors to connect to Wi-Fi does not present any technical difficulty. Depending on the router type simply enter the WEP or WAP key associated with your Wi-Fi after double-clicking the icon "Wireless Network Connection". After a
Wifi is used in hundreds of ways, but one of the most life changing one for me is that it allows me to contact my family who lives in another state and wifi gives me the privilege to talk to them without traveling. For example, my friend Jaymes moved to Florida and I can't go visit him so we text and call each other to see how one another is doing. I wouldn't be able to have a strong connection with him like I used to if it wasn't for wifi. My cousins also live out of state and I can't see them so I just face time them to ask how they are doing, and what has been going on with them. Wifi allows me to talk to my aunts who aren't always around, my Aunt Kathy was on a business and I called her because I misses her. I can enjoy my family's company even though they are not with me through wifi and I am grateful for that. For example I wanted to talk to my grandparents because it was
One reason why wifi is used is to make lots and lots of money that people that work for wifi companies make through ads. It's also used with other people like family, you can use it with
To Kill a Mockingbird was published right as the Civil Rights Movement peaked in the 1960s. A controversial trial that occured during Lee’s childhood sparked her interest in the subject of civil injustices in the south. When she was five, it was rumored that nine black men raped two white women. After many long, harsh and highly publicized trials, the nine men were sentenced to lengthy prison time. Many lawyers and American citizens claimed that the suspected motivation for the result of the case was racial prejudice.
Wifi can be used to check the time on our phones, but more importantly it can be used to check the weather. Back a few years when I still lived in Russia, our home currently had access to wifi. So one day we decided to take some friends and go to the park; before that, we checked the weather. So my mother whipped out her phone and checked it, only to see that a thunderstorm would commence within the next hour. Therefore, wifi had protected my family from getting wet and from possibly getting a cold.
idea that they believe may aid in the process of having Wi-Fi wherever one may go. As well as
In the recent years, wireless technologies have taken a new dimension in the ways society lives. Wireless broadband is available to everyone. Whether the users are at home, driving the car, sitting in the park, and it would even work while people are a pleasure boat ride in the middle of a lake. And because of this, the need to have information at any time and be connected in all places, all the time has been satisfied.
Influenza is a highly contagious disease which can spread across the population by the body secretions which contain the active influenza virus (Collignon & Carnie, 2006). It poses serious threats to the society as it promotes fear, anxiety, and discrimination, and consequently causes destruction to the normal function of the society (Selgelid, 2009). Unless people develop immunity against the influenza virus (Collignon & Carnie, 2006), an influenza pandemic will remain a global emergency as extremely high number of people all over the world will require care at the same time (Kotalik, 2005). Since the global impact of pandemic varies across history, prediction regarding the magnitude of impact will often be overestimated or underestimated
When I was three months old, my parents requested my uncle to deliver me to my grandparents in China; my uncle was the stork and I was the baby. Although I was born in the states, my childhood was far from a typical Chinese-American girl. Instead of an alarm clock, I had a rooster. My grandfather drove me to preschool every day on a motorcycle, and after school I would come home to my grandmother planting seedlings in the endless field of rice paddies across from our house. On the weekends I would run through the Majong house to the snack shop where I would be nit picky about all the candies to decide which one was worthy of my five cents. I had completely assimilated into this culture, this childhood. Until the day that my dad stepped foot
Another way frequency hopping helps us is with some types of communication. Maybe sometimes when I'm busy I can't see my friends face to face so I'll FaceTime them or Skype them. Also iMessaging needs wifi so it doesn't drain data super quick, although texting does use satellites iMessaging depends on both. Snapchat, Instagram, Facebook, Twitter, all of those social media apps or websites need wifi.
Examples of wireless networks include cell phone networks, Wi-Fi local networks and terrestrial microwave networks.
The aim of this project is to prototype a Li-Fi Router which use LED light to transmit data in an indoor scenario. To begin my investigation into the concept of Li-Fi communications. I am doing the research to gain the information which related Li-Fi technology; investigating and plan the systems design and its requirements so that I can have a critical understanding of the development and prototype the System. This is to ensure a productive product with a minimum cost and maximize utilization of the resource. The goal is included evaluating and understanding theoretical mathematical modelling of Free space optical wireless propagation, path loss, modulation technique, application and hardware components, etc. In addition to investigating