mah presdentation

8/8/2019 mah presdentation

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TO

INTRODUCTION TO

BLUETOOTH

TECHNOLOGY


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Bluetooth is named after Harald Bltand (Bluetooth)

Gormson of Denmark, who united his country in the 10thcentury.

Began as a private development effort at Ericsson in1994

yBluetooth SIG (Special Interest

Group) :5 companies Erricson, Intel ,IBM, Toshibha and Nokia

joined (SIG) in 1998.y Currently more than 2500 adopter companies

y FIRST SPECIFICATION: released in July 1999.

y CURRENT SPECIFICATION : Bluetooth 1.2


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Purpose :y Create a cable replacement standard for personal area

network

y Handle simultaneously both data and voice between a

wide range of device.

key features :y Robustness

y

Low complexity of usey Low power

y Low cost


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y Bluetooth is a short range (10-100 m) and low-

cost wireless network system to replace cablesand give RF connection between consumer

device.

The Bluetooth specification defines a uniform

structure for a wide range of devices to connectand communicate with each other.


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Uses the radio range of 2.45 GHzShort range(10m-100m)Voice and data transfer

Theoretical maximum bandwidth is 1 Mb/sSeveral Bluetooth devices can form an

adhoc network called a piconet

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


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y In PICONET one deviceacts as master(setfrequency hopping) and

one device acts as slave.


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y Auto conversation between Bluetooth enabled devices.

y

Formation of personal area network (PAN) orpiconet.

y Spread-spectrum frequency hopping.

y Device works on 79 individual, random frequency

within a designated range.y Transmitter changes 1600 frequencies/sec.

y Data rate up to 1 Mbitsps


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y Inquire

y Page

y Establish a link using Link Manager Protocol

y Discover services using SDP

y Create a channel

y Authenticate

y

Send and receive data


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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


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Three classes of Bluetooth devices

y -Class 3 radios have a range of up to 1 meter or 3 Feet.

y -Class 2 radios most commonly found in mobiledevices have a range of 10 meters or 30 feet

y -Class 1 radios used primarily in industrial use cases

have a range of 100 meters or 300 feet


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3 modes of communication Mode 1 or Insecure mode

y Mode 2 is known as service-level enforced security

y Mode 3 is known as link-level enforced security

Security is provided in three ways

y pseudo-random frequency hopping

y authentication

y encryption


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y Wireless keyboards, mouse, USB adapter, modems, pc

cards.

File transfer.

y Headsets, music players.

y

GPS receiver.y Data sharing.

y Gaming.

y Barcode scanner


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Success of Bluetooth depends on how well itis integrated into consumer products

-Consumers are more interested in applications than thetechnology

-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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y Bluetooth application is real and widely adopted byindustries.

y The possibilities for new application is very exciting

with this versatile technology.y In we will be able to see some new boom in science

using this technology.

y Recently a project has been completed by IITians in

which daily used devices can be searched usingbluetooth of mobile and PDA.


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