bluetooth kusum

8/7/2019 bluetooth kusum

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Bluetooth wireless technology is an open specification for a lowcost, low power, short- range radio technology for ad-hoc wireless

communication of voice and data anywhere in the world


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` What is Bluetooth?->Bluetooth is a short-range wireless communication technolgy

` Why this name?->It was taken from the 10th century Danish King Harald Blatand who unifiedDenmark and Norway.

` When does it appear?->1994 Ericsson study on a wireless technology to link mobile phones& accessories.

->5 companies joined to form the Bluetooth Special Interest Group

(SIG) in 1998.->First specification released in July 1999.


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Notebook PCs &Desktop computers

Printers PDAs

Other handhelddevices

Cell phones Wireless peripherals:

Headsets Cameras

CD Player

TV/VCR/DVD

Access Points

Telephone AnsweringDevices

Cordless Phones

Cars


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` Originally conceived as a cable replacement technology.

` Short-range wireless solutions

` Open specifications

` Voice & data capability

` Worldwide usability

` Other usage models began to develop:

->Personal area network(PAN)

->Ad-hoc networks

->Data/voice access points->wireless telemetics


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Connection TypeSpread Spectrum (Frequency Hopping)

& Time Division Duplex (1600 hops/sec)

Spectrum2.4 GHz ISMOpen Band (79 MHz of

spectrum = 79 channels)

Modulation Gaussian FrequencyS

hift KeyingTransmission Power 1 mw 100 mw

Data Rate 1 Mbps

Range 30 ft

Supported Stations 8 devicesData Security Authentication Key 128 bit key

Data Security Encryption Key 8-128 bits (configurable)

Module size 9 x 9 mm


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` Bluetooth will support wireless point-to-point and point-to-

multipoint (broadcast) between devices in a piconet.

` Point to Point Link

Master - slave relationship

Bluetooth devices can function as masters or slaves` Piconet

It is the network formed by a Master and one or more

slaves (max 7)

Each piconet is defined by a different hopping channel to

which users synchronize to

Each piconet has max capacity (1 Mbps)

m s

s s s

m


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` Security Measures

Link Level Encryption & Authentication.

Personal Identification Numbers (PIN) fordeviceaccess.

Long encryption keysare used (128 bit keys).

These keysare nottransmitted overwireless. Other

parametersaretransmitted overwireless which in

combination with certain information known to thedevice,

can generatethe keys.

Furtherencryption can bedoneattheapplication layer.


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` Success of Bluetooth depends on how well it is

integrated into consumer products

Consumers are more interested in applications than the

technology

Bluetooth must be successfully integrated into consumerproducts

Must provide benefits for consumer

Must not destroy current product benefits

`

Key Success Factors Mass Production at Low Cost

Ease of Use

End User Experience


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bluetooth kusum

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