Bluetooth Device Wireless Technology

8/3/2019 Bluetooth Device Wireless Technology

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Respected Maam & DearFriends


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Presented byRAHUL .V .CHOURASIA .


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Definition of Bluetooth

Bluetooth is a short range (10-100 m)and low-cost wirelessnetwork system to replace cables and

give RF connectionbetween consumer devices.


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What is Bluetooth?o Bluetooth is a short-range wireless communications

technology.

Why this name?o It was taken from the 10th century Danish King HaraldBlatand who unified Denmark and Norway.

When does it appear?o 1994 Ericsson study on a wireless technology to link

mobile phones & accessories.o 5 companies (Ericssn,Nokia,IBM,Toshiba & Intel)joined

to form the Bluetooth SpecialInterest Group (SIG) in1998 named.

o First specification released in July 1999.


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Uses the radio range of 2.45 GHz

Theoretical maximum bandwidth is 1 Mb/s SeveralBluetooth devices can form an

adhoc network called a piconet In a piconet one device acts as a master (setsfrequency hopping behavior) and the others as

slaves Example: A conference room with manylaptops wishing to communicate with eachOther


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Laptops Cellular phones Personal Digital Assistants Headsets

Printers Keyboards/mice GPS, etc Majoruse in consumer

El

ectronics.


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Allows up to 8 devices to communicate in a localnetwork called a Piconet, also known as a PersonalArea Network or PAN Because of its low power consumption, its range islimited to 10 m.

However, range can be increased to 100 m byemploying a scatternet topology or a higher poweredantenna Three classes ofBluetooth devices

-Class 3 radios have a range ofup to 1 meter or 3Feet.-Class 2 radios most commonly found in mobiledevices have a range of 10 meters or 30 feet-Class 1 radios used primarily in industrialusecases have a range of 100 meters or 300 feet


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The Bluetooth standard is maintained andpublished

by the Bluetooth SpecialInterest Group (SIG) Includes thousands of member companies Covers topics such as interoperability,

testing andqualification of bluetooth devices Most important, outlines the specifications

for:- Bluetooth Radio- Baseband

- LMP Link Manager Protocol


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Responsible forlink set-up between devices,including security functions : Authentication Encryption

Authentication The process of verifying 'who' is atthe other end of the link. Authentication isperformed for devices. In Bluetooth, this is achievedby the authentication procedure based on the stored

link key or by pairing (entering a PIN).Authentication device A device whose identity has

been verified during the lifetime of the current linkbased on the authentication procedure.


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If at least one authentication has beenperformed encryption may be used. If themaster wants all slaves in the piconet to usethe same encryption parameters it must issue

a temporary key (K master ) and make this keythe current link key for all slaves in thepiconet before encryption is started. This isnecessary if broadcast packets should be

encrypted.


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Infrared IrDA (WPAN) : synchronization,link

between a phone and a laptop

L

ess flexib

le than

Bluetooth, need of a

lineof site

Comparable data rate Wi-Fi (WLAN) : Wireless LAN access

Far higher bandwidth and data rate thanBluetooth Higher power consumption than Bluetooth Requires infrastructure investment


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Success ofBluetooth depends on how well it isintegrated into consumer products

-Consumers are more interested in applicationsthan the technology-Bluetooth must be successfully integrated into

consumer -- products-Must provide benefits for consumer-Must not destroy current product benefits

Key Success Factors-Interoperability

-Mass Production at Low Cost-Ease ofUse-End User Experience


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THANKS FOR YOUR ATTENTION

Documents

Bluetooth Device Wireless Technology