Blutooth technology
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Transcript of Blutooth technology
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