Saturday, 28 September 2013

Bluetooth Basics




The technology of Bluetooth wireless is a short



range communications method intended to replace



the cables that connect portable or fixed devices



while maintaining the highest levels of security.





The key features offered by Bluetooth include



low power and low cost. The specification in



Bluetooth defines a uniform structure for a wide



range of devices to communicate and connect with



one another.





The technology behind Bluetooth has achieved



global satisfaction such as enabled devices, almost



everywhere in the world. Bluetooth devices will



connect and communicate without wires through



short range and networks known as piconets.





Each device will simultaneously communicate with



up to seven other devices within a single piconet,



meaning that each device can also belong to



several piconets simultaneously. The piconets



are dynamically established as Bluetooth enabled



devices enter and leave the proximity of radio.





A fundamental to Bluetooth strength is the



ability to handle both data and voice transmissions



simultaneously. This will enable users to enjoy



varieties of innovative solutions such as hands



free talking, printing and fax capabilities,



and other applications.





Specifications



Unlike other standards of wireless, the Bluetooth



specification gives product developers both a



link layer and application layer definitions,



which will help support data and voice applications.





Spectrum



The Bluetooth technology operates in the industrial



and scientific band at 2.4 to 2.485 GHz, using a



spread spectrum, frequency hopping signal.





Interference



The adaptive frequency hopping of Bluetooth



technology was designed to reduce interference



between wireless technologies that share the 2.4



GHz spectrum. Adaptive frequency hopping (AFH)



works well within the spectrum to take full



advantage of the frequency available.





AFH hopping allows for more efficient transmission



within the spectrum, which provides users with



greater performance even if they are using other



technologies along with Bluetooth.

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