Bluetooth Prakash

8/9/2019 Bluetooth Prakash

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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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Bluetooth Prakash

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