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Submitted by:-
PRAKASH.P.C
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Greatest synchronization and file transfertechnologies.
Bluetooth technology is the key to moving
files effortlessly off and on to various
communication devices.
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Low bandwidth wireless networking technology
Designed primarily to replace cables for
communication between personalcomputing/communication devices
Used for both voice and data communications
Common standard for wireless communicationsbetween cell phones and PDAs, headsets.
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Initiated by Ericsson, IBM, Intel, Nokia and Toshiba inearly 1998
Formed a special interest group known as the BluetoothSIG.
Many companies are members of the Bluetooth
All are committed to developing and supporting theBluetooth standard.
Bluetooth became an IEEE (Institute of Electrical andElectronics Engineers) standard during 2002.
Acceptance of Bluetooth as an industry standard
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Inexpensive
Bluetooth operates at a frequency range of
2.4GHz-2.4835GHz Many versions of Bluetooth have come till now
1.0, 1.0B, 1.1, 1.2, 2.0, 2.1
Basic difference between the versions is speed,capacity and security. Future version is 3.0.
Uses low power and spread-spectrum frequencyhopping
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Low power
Limits the range to about 10 meters
Signal is weak at 1 milliwatt (compared to cell
phones at 3 watts)
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Spread-Spectrum Frequency Hopping
Uses79 individual, randomly chosen
frequencies within a designated range(compared to Japan, which uses 23frequencies)
Changes frequencies 1,600 times every
second Each channel is divided into time slots 625
microseconds long
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Scandinavian countries have been leading
the world in wireless communications for a
long time now; and Bluetooth technology
was named after a Scandinavian historical
figure: King Harald Bluetooth, a famousDanish king of the 10th century; who united
Denmark and introduced Christianity to the
country.
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Bluetooth will be used for personalarea networks
Very small range networks between cell
phones, PDAs, MP3 players andcomputers etc.
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Mobile Phones
Video Games Keyboards
Headsets
PDAS Bluetooth USB port
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Bluetooth supports both voice and data.
According to Bluetooth spectrum:-
The voice channels support 64Kb/s.
An asymmetric data rate is 721Kb/s.
Symmetric data rate is 432.6Kb/s.
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Bluetooth is intended to replace wires in small,
personal communication devices; and does not
support many of the features that a full-fledged
wireless LAN technology needs in order to be used
for corporate local area networks.
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Bluetooth devices have two levels of security:
Trusted device has unrestricted access to all services Untrusted device
Services have three levels of security:
Those that require authorization and authentication
Those that require authorization only
Those that are open to all devices
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The manufacturers of the vulnerable
phones have developed software patches
to fix the problem
The device can be set to the non-
discoverable mode when not using
Bluetooth technology or when in anunknown area
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