Page 1 of 2: FAQ: Bluetooth!! What is it actually?

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Bluetooth!! What is it actually?

Is it a tooth with a blue colour??

or something else?

well bluetooth is everywhere now...in mobiles..speakers...cars...etc etc

aujla · Credits: 102267513 My Scrapbook

aujla · Credits: 102267513 My Scrapbook

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. The Bluetooth specifications are developed and licensed by the Bluetooth Special Interest Group.

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There are three class of bluetooth

Class 1 100 mW (20 dBm) ~100 meters

Class 2 2.5 mW (4 dBm) ~10 meters

Class 3 1 mW (0 dBm) ~1 meter

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List of applications
More prevalent applications of Bluetooth include:

Wireless control of and communication between a cell phone and a hands-free headset or car kit.

Wireless networking between PCs in a confined space and where little bandwidth is required

Wireless communications with PC input and output devices, the most common being the mouse, keyboard and printer.

Replacement of traditional wired serial communications in test equipment, GPS receivers, medical equipment and traffic control devices

Sending small advertisements from Bluetooth enabled advertising hoardings to other, discoverable, Bluetooth devices

Seventh-generation game consoles—Nintendo Wii, Sony PlayStation 3—use Bluetooth for their respective wireless controllers.

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Overview of Operation
The Bluetooth RF (physical layer) operates in the unlicensed ISM band at 2.4GHz. The system employs a frequency hop transceiver to combat interference and fading, and provides many FHSS carriers. RF operation uses a shaped, binary frequency modulation to minimize transceiver complexity. The symbol
rate is 1 Megasymbol per second (Msps) supporting the bit rate of 1 Megabit per second (Mbps) or, with Enhanced Data Rate, a gross air bit rate of 2 or 3Mb/s. These modes are known as Basic Rate and Enhanced Data Rate respectively.

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History of bluetooth

The Bluetooth specification was developed in 1994 by Sven Mattisson and Jaap Haartsen, who were working for Ericsson Mobile Platforms in Lund, Sweden.
The specifications were formalized by the Bluetooth Special Interest Group (SIG). The SIG was formally announced on May 20, 1998. Today it has over 7000 companies worldwide.
It was established by Ericsson, Sony Ericsson, IBM, Intel, Toshiba, and Nokia, and later joined by many other companies. Bluetooth is also known as IEEE 802.15.1.

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Versions-

1.Bluetooth 1.0 and 1.0B

2.Bluetooth 1.1

3.Bluetooth 1.2

4.Bluetooth 2.0

5.Bluetooth 2.1

6.Bluetooth 3.0

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High speed bluetooth
On 28 March 2006, the Bluetooth Special Interest Group announced its selection of the WiMedia Alliance Multi-Band Orthogonal Frequency Division Multiplexing (MB-OFDM) version of UWB for integration with current Bluetooth wireless technology

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Ultra Low Power Bluetooth

On 12 June 2007, Nokia and Bluetooth SIG announced that Wibree will be a part of the Bluetooth specification as an ultra low power Bluetooth technology. Expected user cases includes watches displaying Caller ID information, sports sensors monitoring your heart rate during exercise, as well as medical devices. The Medical Devices Working Group is also creating a medical devices profile and associated protocols to enable this market.

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