Bluetooth Technology

By G.V.S.Bharadwaj

12761A0522`

What is BT?Objectives of BTOverview of BT HistoryHow BT works?Different Phases of BT Hands free kit connectionCharacteristics of BTClasses of BTApplications of BTAdvantages of BTDisadvantages of BTFuture of BTConclusion

CONTENTS

“Bluetooth is a wireless technology that is mainly used for transfer data between different electronic devices for ad-hoc wireless communication of voice and data anywhere in the world.”

Objectives of BT

Cable ReplacementLow CostLow PowerSmall Size

Overview of Bluetooth History

Why this name?1.It was taken from the 10th century Danish

King ‘Harald Bluetooth(940-981)’ who was famous for uniting Denmark and Norway into a single nation.

2. He was also successful in converting all the Danes to Christianity.

Overview of Bluetooth History

When does it appear?1. In 1994, Jim Kardach, an Intel engineer working on wireless technologies. Kardach took on the role of a cross-corporate mediator dedicated to bringing various companies together to develop an industry-wide standard for low-power, short-range radio connectivity.2. Together with 4 other companies (IBM, INTEL, TOSHIBA, NOKIA) it formed a SIG. (Special Interest Group)3. The project is named as Bluetooth.

Words of Kardach after uniting all the companies:

Bluetooth was borrowed from the 10th-century, second king of Denmark, King Harald Bluetooth; who was famous for uniting Scandinavia just as we intended to unite the PC and cellular industries with a short-range wireless link.

Definition“Two or more Bluetooth units sharing the same channel”

One device acts as a master and the devices connectedto it act as slaves.

Slaves can not directly send data to each other.

In effect, the master acts as a switch for the piconetand all traffic must pass through the master.

There can be up to 7 active slaves in a piconet but onlyone master.

Working of BlueTooth

Piconets

Piconet formation

Master

Active Slave

Parked Slave

Standby

Scatternets

DEFINITION “A set of two or more interconnected piconets form

scatternets.”

A Bluetooth unit can be a slave in two or more piconets, but it can be a master in only one.

Devices that participate in two or more piconets may act as “gateways.”

Bluetooth units can only transmit and receive data in one piconet at a time.

Piconets may be identified by the master's identity and clock.

Devices give notification of inactivation to master before becoming inactive in its piconet for a finite length of time.

Scatternet formationMaster

Active Slave

Parked Slave

Standby

Different phases of Bluetooth Hands free kit

connectionDiscovery

Pairing

Detection of

Profiles

Connection

Data Synchronisati

on

Hello, I am looking for bluetooth devices

Hello, I am an

available Bluetooth

device

Different phases of Bluetooth Hands free kit

connection

Discovery

Pairing

Detection of

Profiles

Connection

Data Synchronisati

on

What is your authentification

Code ?

1234…This code has to be typed on

your keyboard

Ok !Now we

are paired

Different phases of Bluetooth Hands free kit

connectionDiscovery

Pairing

Detection of

Profiles

Connection

Data Synchronisati

on

What type of profile do you

support ?

I can do headset and hands-free.

What about you ?

Different phases of Bluetooth Hands free kit

connection

Discovery

Pairing

Detection of

Profiles

Connection

Data Synchronisati

on

Ok, we are now

connected in Hands-free.

I can do hands-free.

Different phases of Bluetooth Hands free kit

connectionDiscovery

Pairing

Detection of

Profiles

Connection

Data Synchronizati

on

To complete my

phonebook, I have to

synchronise with your contacts

Ok, I transfer my

163 contacts.

Characteristics of Bluetooth

Bluetooth stands for Short-range transmission of digital voice and data.

Bluetooth used a Radio Technology called Frequency Hopping Spread Spectrum.

Frequency Range: 2200MHz – 2400 MHzVanishes the need of chord and wire.Range of Connection : 10 m – 100 m.Supports data rate of : 1Mb/s.

Classes of Bluetooth

There are three classes of Bluetooth devices. Class 3 Radio: have range up to 1 meters or 3 feet. Class 2 Radio: most commonly found in mobile

devices – have range of 10 metes or 30 feet. Class 1 Radio: used primarily in Industrial use cases –

have range of 100 meters or 300 feet.

Applications of Bluetooth

LaptopsCellular phonesPersonal digital assistantsHeadsetsCable less connections to PrintersBluetooth MousesBluetooth KeyboardsGPS etc…

Bluetooth Technology

Advantages and Disadvantages

Advantages Eliminates wires

Facilitates Data and Voice Communication

Offers formation of Ad hoc networks

Standardized protocol

Free of charge

Easy to use

Low power and consumes less battery

Stationary and mobile environments

Disadvantages

Relatively short range

Less secure

Interference with other devices

Mediocre Data rates

Bluetooth internet connection gets slow sometimes

More battery power when Bluetooth is enable on the phone all day

Future Of Bluetooth

Future Of Bluetooth

Bluetooth has a good future ahead because it meets a basic need of connectivity.Latest version of Bluetooth are improving both its security and capabilities.New versions of Bluetooth technology will meet the high-speed and large range.Many companies are designing impressive Bluetooth applications in demand.

CONCLUSION

Bluetooth is a short range radio link wireless technology used to connect various device by a invisible link getting rid of wires.

Bluetooth seems to have a bright future after reviewing its benefits and wide use.

Last but not the least, WHENEVER THINK OF WIRELESS,”THINK BLUETOOTH”, this is the best way of communication.

Thank you for your presence