Optical Wireless Networking

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OPTICAL WIRELESS NETWORKING : 

Illuminating the future of LANs Daniel Rich ITEC 2320 OPTICAL WIRELESS NETWORKING

BANDWIDTH : 

BANDWIDTH Every day the demand for more capacity grows

AVAILABILITY : 

AVAILABILITY High speed throughput is limited by the “last mile”

THE DIFFERENCE : 

THE DIFFERENCE FIBER OPTIC BACKBONE LOCAL LOOP Fiber has demonstrated speeds up to 100 Gbps Average download speed for the nation: 5.1 mbps

WI-FI : 

WI-FI TODAY’S ANSWER Wi-Fi is the only real option for wireless connectivity in homes & small businesses. The data transfer rates are less than needed, especially when multiple devices use the same connection. Full multiplexing is not possible for Wi-Fi.

WIRES : 

WIRES To avoid Wi-Fi bottlenecks, this is the alternative: …and it’s not pretty

A NEW SOLUTION : 

A NEW SOLUTION Replace radio waves with beams of light

BREAKTHROUGH : 

BREAKTHROUGH Researchers discovered a way to encode infrared light with data in a way that dramatically improves transmission speed The method delivers speeds more than 1 Gbps

RADIO VS. INFRARED : 

RADIO VS. INFRARED Unlike radio waves used by Wi-Fi, light photons can deliver broader bandwidth that can be used simultaneously by multiple devices. Also, photons do not interfere with each other or pass through walls like radio transmissions

HOW IT WORKS : 

HOW IT WORKS The encoded infrared light is sent through a special holographic grid resulting in multiple beams all carrying the same data

THE LIGHT GRID : 

THE LIGHT GRID The pencil-thin beams of infrared light fill the volume of a room, and devices fitted with infrared receivers pick up data from the beams anywhere within the array Beams reflect off of walls, desktops, even faces

THE NEXT STEP : 

THE NEXT STEP WHITE LED Capable of even higher bandwidth, white LED lamps could replace infrared in future optical wireless systems. White LEDs could light up rooms efficiently while simultaneously providing broadband wireless access.

WHITE LED LIGHT : 

WHITE LED LIGHT Experts believe the cost of white LEDs will drop and they will become the standard light source for homes because of their energy efficiency. Wireless systems based on them would be easy to integrate into existing fixtures

MORE ADVANCEMENTS : 

= + MORE ADVANCEMENTS Combined with other proposed broadband solutions, optical wireless may soon bring amazing speeds

REFERENCES : 

REFERENCES Network+ Guide to Networks www.speedmatters.org/content/2009report http://blogs.techrepublic.com.com/networking/?p=2949 Scientific American: July 2007 issue http://live.psu.edu/story/44147 http://www.nytimes.com/2008/07/28/technology/28led.html?_r=1