14-06-2014, 03:12 PM
LI-FI : NEW TECHNOLOGY IN WIRELESS COMMUNICATION
[attachment=64896]
INTRODUCTION
Whether you’re using wireless internet in a coffee shop, stealing it from the guy next door, or competing for band width at a conference, you’ve probably gotten frustrated at the slow speeds you face when more than one device is tapped into the network. As more and more people -and their many devices – access wireless internet, clogged airwaves are going to make it.
One German physicist, Harald Haas, has come up with a solution he calls “data through illumination” – taking the fibre out of fibre optics by sending data through an LED light bulb that varies in intensity faster than the human eye can
PRESENT SCENARIO
We have 1.4 million cellular mast radio waves base stations deployed. We also have over 5 billions of mobile phones. Mobile phone transmits more than 600 Tb of data. Wireless communication has become a utility like electricity, water, etc. We use it in our everyday life, in our private life, business life. Currently Wi-Fi uses Radio Waves for communication. It is important to look into this technology which has become fundamental to our life
MAIN ISSUES WITH RADIO WAVES
There are mainly four issues with radio waves. They are capacity, efficiency, availability, and security.
Capacity: We transmit wireless data through radio waves. Radio waves are limited. They are scar and expensive. We only have a certain range of it. With the advent of the new generation technologies as of likes of 2.5G, 3G, 4G and so on we are running out of spectrum.
Efficiency: There are 1.4 million cellular base stations. They consume massive amount of energy. Most of this energy is not used for transmission, but for cooling down the base stations. Efficiency of such base station is only 5% and that raise a very big problem.
ALTERNATIVE TO RADIO WAVES IN EM SPECTRUM
So there are four major concerns ie, are capacity, efficiency, availability, and security related with radio waves. But on the other hand we have 40 billions of light box already installed and light is the part of electromagnetic spectrum. So let’s look up at this context of Electromagnetic Spectrum
LIGHT FOR WI-FI COMMUNICATION
Light has been around for millions of years. It has created us, has created life, and has created all stuffs of life. Flickering lights are annoying, but they may have an upside. Visible Light Communication (VLC) uses rapid pulses of light to transmit information wirelessly. Now it may be ready to compete with conventional Wi-Fi. So it is inherently safe to use and would be great if we can use it for our wireless communication
WHAT & HOW TO DO?
What we have to do is replace inefficient fluorescent lights with these new dignitaries of LED lights. It is a semi conductive device. The LED bulb will hold a microchip that will do the job of processing the data. Light intensity can be modulated at very high speeds to send data by tiny changes in amplitude.
Remote control has an IR led. It creates a single data stream, high speed data rates of 10000b/s to 20000b/s. Replace remote control with light box. With this technology we transmit 1000’s of data stream in parallel at high speeds. We termed this technology as Special Modulation
IS IT A PROVEN TECHNOLOGY
Yes, this is already proven. Harald Haas demonstrated his invention using an ordinary table lamp that successfully transmitted data at speeds exceeding 10 Mbps using light waves from LED light bulbs to a computer located below the lamp. To prove that the light bulb was the source of the data stream, he periodically blocked the beam of light, causing the connection to drop
OVERCOMING THE FOUR ISSUES WITH RADIO WAVE IN LI-FI
Capacity: It has 10000 times more spectrum than radio waves. Light box are already present. So we have the infrastructure available and already installed.
Efficiency: Data is through illumination and thus data transmission comes for free. LED lights consume less energy and it is highly efficient.
Availability: Everywhere light is present. So no worry about it’s availability.
Security: Light waves don’t penetrate through walls. So it can’t be intercepted and misused. Data is present where there is light.
APPLICATIONS OF LI-FI
At present its applications ate beyond imagination, but still if to think about few, and then they are:
• Can be used in the places where it is difficult to lay the optical fibre like hospitals. In operation theatre Li-Fi can be used for modern medical instruments.
• In traffic signals Li-Fi can be used which will communicate with the LED lights of the cars and accident numbers can be decreased.
• Thousand and millions of street lamps can be transferred to Li-Fi lamps to transfer data.
• In aircraft Li-Fi can be used for data transmission.
• It can be used in petroleum or chemical plants where other transmission or frequencies could be hazardous.
CONCLUSION
The possibilities are numerous and can be explored further. If this technology can be put into practical use, every bulb can be used something like a Wi-Fi hotspot to transmit wireless data and we will proceed towards the Cleaner, Greener, Safer And Brighter Future
[attachment=64896]
INTRODUCTION
Whether you’re using wireless internet in a coffee shop, stealing it from the guy next door, or competing for band width at a conference, you’ve probably gotten frustrated at the slow speeds you face when more than one device is tapped into the network. As more and more people -and their many devices – access wireless internet, clogged airwaves are going to make it.
One German physicist, Harald Haas, has come up with a solution he calls “data through illumination” – taking the fibre out of fibre optics by sending data through an LED light bulb that varies in intensity faster than the human eye can
PRESENT SCENARIO
We have 1.4 million cellular mast radio waves base stations deployed. We also have over 5 billions of mobile phones. Mobile phone transmits more than 600 Tb of data. Wireless communication has become a utility like electricity, water, etc. We use it in our everyday life, in our private life, business life. Currently Wi-Fi uses Radio Waves for communication. It is important to look into this technology which has become fundamental to our life
MAIN ISSUES WITH RADIO WAVES
There are mainly four issues with radio waves. They are capacity, efficiency, availability, and security.
Capacity: We transmit wireless data through radio waves. Radio waves are limited. They are scar and expensive. We only have a certain range of it. With the advent of the new generation technologies as of likes of 2.5G, 3G, 4G and so on we are running out of spectrum.
Efficiency: There are 1.4 million cellular base stations. They consume massive amount of energy. Most of this energy is not used for transmission, but for cooling down the base stations. Efficiency of such base station is only 5% and that raise a very big problem.
ALTERNATIVE TO RADIO WAVES IN EM SPECTRUM
So there are four major concerns ie, are capacity, efficiency, availability, and security related with radio waves. But on the other hand we have 40 billions of light box already installed and light is the part of electromagnetic spectrum. So let’s look up at this context of Electromagnetic Spectrum
LIGHT FOR WI-FI COMMUNICATION
Light has been around for millions of years. It has created us, has created life, and has created all stuffs of life. Flickering lights are annoying, but they may have an upside. Visible Light Communication (VLC) uses rapid pulses of light to transmit information wirelessly. Now it may be ready to compete with conventional Wi-Fi. So it is inherently safe to use and would be great if we can use it for our wireless communication
WHAT & HOW TO DO?
What we have to do is replace inefficient fluorescent lights with these new dignitaries of LED lights. It is a semi conductive device. The LED bulb will hold a microchip that will do the job of processing the data. Light intensity can be modulated at very high speeds to send data by tiny changes in amplitude.
Remote control has an IR led. It creates a single data stream, high speed data rates of 10000b/s to 20000b/s. Replace remote control with light box. With this technology we transmit 1000’s of data stream in parallel at high speeds. We termed this technology as Special Modulation
IS IT A PROVEN TECHNOLOGY
Yes, this is already proven. Harald Haas demonstrated his invention using an ordinary table lamp that successfully transmitted data at speeds exceeding 10 Mbps using light waves from LED light bulbs to a computer located below the lamp. To prove that the light bulb was the source of the data stream, he periodically blocked the beam of light, causing the connection to drop
OVERCOMING THE FOUR ISSUES WITH RADIO WAVE IN LI-FI
Capacity: It has 10000 times more spectrum than radio waves. Light box are already present. So we have the infrastructure available and already installed.
Efficiency: Data is through illumination and thus data transmission comes for free. LED lights consume less energy and it is highly efficient.
Availability: Everywhere light is present. So no worry about it’s availability.
Security: Light waves don’t penetrate through walls. So it can’t be intercepted and misused. Data is present where there is light.
APPLICATIONS OF LI-FI
At present its applications ate beyond imagination, but still if to think about few, and then they are:
• Can be used in the places where it is difficult to lay the optical fibre like hospitals. In operation theatre Li-Fi can be used for modern medical instruments.
• In traffic signals Li-Fi can be used which will communicate with the LED lights of the cars and accident numbers can be decreased.
• Thousand and millions of street lamps can be transferred to Li-Fi lamps to transfer data.
• In aircraft Li-Fi can be used for data transmission.
• It can be used in petroleum or chemical plants where other transmission or frequencies could be hazardous.
CONCLUSION
The possibilities are numerous and can be explored further. If this technology can be put into practical use, every bulb can be used something like a Wi-Fi hotspot to transmit wireless data and we will proceed towards the Cleaner, Greener, Safer And Brighter Future