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Bluetooth is an industrial specification for wireless personal area networks (PANs). Bluetooth provides a way to connect and exchange information between devices such as mobile phones, laptops, PCs, printers, digital cameras, and video game consoles over a secure, globally unlicensed short-range radio frequency with a short range. The Bluetooth specifications are developed and licensed by the Bluetooth Special Interest Group.
Bluetooth was named after a late tenth century king, Harald Bluetooth King of Denmark and Norway. He is known for his unification of previously warring tribes from Denmark......
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Modulation and Demodulation
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The task of Bluetooth is originally to transmit data from one device to another wirelessly, especially from Internet to handhold devices. All the transmission always happens 10 metres away from the end of any Network. Now, let's begin to dig into the detail of the last 10 metres!
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Bluetooth Network
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Bluetooth network is indeed a kind of wireless short-range network, which is built on Frequency Hopping Spread Spectrum (FHHS). As a result, it has the basic element of a network. Inside the network, the date packets transform on physic links and logical links. There are also network protocols, like L2CAP.
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Comparision
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Still by now, WiFi, IRDA, Bluetooth as well as other wireless technique are still living under the same roof, and in the near future, the situation will not be changed. They will still be competing with each other neck by neck for more consumers......
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Prospects
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Standard Bluetooth criteria have five principles: low cost, low power waste, small coverage, global standardization as well as robustness. These, by now, still provided developing directions for Bluetooth.
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