bluetooth technology -- detailed explanation
TRANSCRIPT
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lakshmi narayana.CAbhimat mishra
Siva pradeepB-TECH
VIT UNIVERSITY
Presented By :-
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Contents
IntroductionHistoryTechnology ReviewBluetooth vs Other Wireless TechnologiesAdvantages of Bluetooth TechnologyDisadvantages of Bluetooth TechnologyFuture of BluetoothConclusionReferences
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Introduction
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IntroductionDefinition
Bluetooth is a short-range and low power wireless technology originally developed for exchanging data over short distances from fixed and mobile devices, creating personal area networks (PANs).
Short-range radio frequency technology that operates at 2.4 GHz on an unlicensed Industrial Scientific Medical (ISM) band.
Effective range of Bluetooth devices is 10 meters.
It was originally conceived as a wireless alternative to data cables.
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Cordlessheadset
Cell phone
mouse
Cable replacement
Ad hoc networking
Data accesspoint
Internet access
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History
The word "Bluetooth" is taken from the 10th century Danish King Harald Bluetooth, he had been influential in uniting Scandinavian tribes into a single kingdom.
Bluetooth was named so because
1) Bluetooth technology was developed in Scandinavia.
2) Bluetooth technology is able to unite differing industries such as the cell phone, computing, and automotive markets.
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Technology Review
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Technology ReviewBluetooth uses a radio technology called frequency-hopping spread spectrum.
Supports data rate of 1 Mb/s(originally).
The Bluetooth specifications are developed and licensed by the Bluetooth Special Interest Group (SIG).
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Classes Of Bluetooth Bluetooth devices are classified according to three different power classes, as shown in
the following table.
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Piconets 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.
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Master
Active Slave
Parked Slave
Standby
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Cell phone Cordlessheadset
Cordlessheadset
Cell phone
Cordlessheadset
Cell phone
mouse
Master
Active Slave
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ScatternetsDEFINITION “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.
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Master
Active Slave
Parked Slave
Standby
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Application Framework and Support
Link Manager and L2CAP
Radio & Baseband
Host Controller Interface
RF
Baseband
AudioLink Manager
L2CAP
TCP/IP HID RFCOMM
Applications
DataC
ontro
l
Bluetooth Protocols
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Bluetooth ProtocolsRadio Protocol
Responsible for the modulation and demodulation of data into RF signals.The radio layer describes the physical characteristics a Bluetooth device’s receiver-transmitter component must have.
BASEBAND PROTOCOL
Responsible for channel coding and decoding.Digitizes the signals received by the radio for passing up the stack.Formats the data it receives from the Link Controller (upper protocol) for transmission over the channel.
Link Controller
Responsible for establishing and maintaining the links between Bluetooth units.
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Bluetooth Protocols
The Link Manager Protocol (LMP) Handles link setup, authentication, link configuration and security procedures. Establishes all connections with the help of baseband protocol.
Host Controller InterfaceThe Host Controller Interface (HCI) defines uniform methods for accessing and controlling the lower layers of the protocol stack (baseband and the link manager).
Logical Link Control and Adaptation Protocol (L2CAP) Responsible for:
Establishing connections across existing ACL (Asynchronous Connection-oriented) links or requesting an ACL link if one does not already exist.Allow many different applications to use a single ACL link through multiplexing.Repackaging the data packets it receives from the higher layers into the form expected by the lower layers.
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Bluetooth ProtocolsService Discovery Protocol
Defines procedures forDiscovering services of other devices.Determining the characteristics of those services.
Telephony Control Protocol Specification (TCS) defines call
Control signaling for establishing speech and data calls between Bluetooth devices, providing them with telephony services.
Object Exchange Protocol
Is a specification for Object data exchange over IR(InfraRed links).Examples for using OBEX include exchanging business cards and synchronizing calendar applications.
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Bluetooth vs Other Wireless Technologies
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Bluetooth vs Other Wireless Technologies
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Different phases of Bluetooth Hands free kit connection
Discovery
Pairing
Detection of Profiles
Connection
Data Synchronisation
Hello, I am looking for bluetooth devices
Hello, I am an available Bluetooth
device
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Different phases of Bluetooth Hands free kit connection
Discovery
Pairing
Detection of Profiles
Connection
Data Synchronisation
What is your authentification
Code ?
1234…This code has to
be typed on your keyboard
Ok !Now we are
paired
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Different phases of Bluetooth Hands free kit connection
Discovery
Pairing
Detection of Profiles
Connection
Data Synchronisation
What type of profile do you
support ?
I can do headset and hands-free.
What about you ?
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Different phases of Bluetooth Hands free kit connection
Discovery
Pairing
Detection of Profiles
Connection
Data Synchronisation
Ok, we are now connected in Hands-free.
I can do hands-free.
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Different phases of Bluetooth Hands free kit connection
Discovery
Pairing
Detection of Profiles
Connection
Data Synchronization
To complete my phonebook, I
have to synchronise with your contacts
Ok, I transfer my 163
contacts.
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The Hands Free synchronizes its phonebook with the contacts on the mobile phone.
The phonebook is vocally available at any time through Voice Recognition, Text To Speech & Voice Tags.
Synchronization is done only once (at first connection).
Phonebook synchronization
AutomaticAlessandro Del PieroGianluigi BuffonFabio CannavaroFabio GrossoTiagoDavid Trezeguet
Alessandro Del Piero
Gianluigi Buffon
Fabio Cannavaro
Fabio GrossoTiago
David Trezeguet
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Bluetooth TechnologyAdvantages and Disadvantages
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Advantages Eliminates wires
Facilitates Data and Voice Communication
Offers formation of Ad hoc networks
Standardized protocol
Free of charge
Easy to use
Low power consumes battery less
Stationary and mobile environments
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Disadvantages Relatively short range
Less secure
Interference with other devices
Mediocre Data rates
Bluetooth internet connection gets slow sometimes
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Future Of Bluetooth
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Future Of BluetoothBluetooth has a good future ahead because it meets a basic need of connectivity.Currently a protocol is being researched that would support large ad hoc networks.Latest version of Bluetooth are improving both its security and capabilities.Ultra wide band has been chosen by the Bluetooth Special Interest Group as the future of Bluetooth Technology.New versions of Bluetooth technology will meet the high-speed and large range.Many companies are designing impressive bluetooth applications in demand.
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ConclusionA new global standard for data and voice
Eliminates Cables.
Low Power, Low range, Low Cost network devices.
Bluetooth seems to have a bright future after reviewing its benefits and wide use.
Further improvements are planned to be made inData Rates
Power Reduction
Range
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References[1] Future Of Bluetooth Technology
by Justin Blasdin, Kian Pokorny
[2] Security Comparison: BluetoothTM Communications vs. 802.11Thomas G. Xydis Ph.D, Simon Blake-Wilson
[3] Bluetooth dot dot attacks By John F.David, Michael Barclay
[4] Bluetooth : A Technology in DemandBy Aniston Roger, Siamonds Lee
[5] Bluetooth Erahttp://en.wikipedia.org/wiki/Bluetooth
[6] Blue Tooth http://www.wirelessdevnet.com/channels/bluetooth/features/bluetooth.html
[7] Introduction To Bluetoothhttp://www.gsmfavorites.com/documents/bluetooth/introduction/
[8] Advantages Of Bluetoothhttp://ezinearticles.com/?What-Are-The-Advantages-Of-Bluetooth-Technology?&id=562666
[9] Bluetooth vs. Wi-Fi Technology http://www.smallbusinesscomputing.com/webmaster/article.php/3331421
[10] Hack Device via Bluetooth without owner’s permission http://www.wonderhowto.com/how-to/video/how-to-hack-a-cell-phone-to-make-free- phone-calls-
218649/
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Thank you for your presence