26-11-2012, 02:53 PM
Bluetooth A wireless Connector
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INTRODUCTION:
Bluetooth is a modern technology.Its aim is wireless transfer of data.
Bluetooth is based on the principle of Radio Frequency. It is designed to be an inexpensive,
wireless networking system for all classes of portable devices , such as laptops, PDAs
(personal digital assistants), and mobile phones .
The original idea was to create a small, inexpensive radio chip that could be used in mobile
computers, printers, mobile phones, and so on, to transmit data between these devices.
The name Bluetooth comes from Danish history. Harald Blatand, who was called
Bluetooth, was the son of King Gorm the Old, who ruled Jutland, the main peninsula of
Denmark. By the time Harald became king, he was a skilled Viking warrior. So, when his
sister asked for help to secure control in Norway after her husband died, Harald quickly
seized the opportunity to unite the countries and expand his kingdom. By 960 A.D.,
according to the story, Harald was at the height of his powers, and ruled both Denmark
and Norway. He was later credited with bringing Christianity to his Viking realm
Bluetooth Components
-A complete Bluetooth system will require these elements:
-An RF portion for receiving and transmitting data
-A module with a baseband microprocessor
-Memory
-An interface to the host device (such as a mobile phone)
Protocols
Bluetooth protocols are sets of conventions that govern the transmittal of data in upper
and lower layers of the system.
The lower-layer protocols pertain to establishing connections, and the upper
layers correspond to specific types of applications.
The Promise of Bluetooth – What it can do
The promise of Bluetooth is extremely ambitious. If Bluetooth lives up to its potential, it will revolutionize the way people interact with information technology. Originally conceived as a low-power short-range radio technology designed to replace cables for interconnecting devices such as printers, keyboards, and mice, its perceived potential has evolved into much more.
Compared with wireless LANs
There is even talk of Bluetooth competing with WLANs, but Bluetooth products work over shorter distances and are designed to solve different problems. While the functionality of a WLAN device stands alone as a network component, the functionality of a Bluetooth component requires a host. The host can be any number of Bluetooth -enabled devices such as cell phones, headsets, keyboards, PDAs, vending machines, cameras, and bar code readers