Data and Computer CommunicationData and Computer CommunicationPresentation on :Presentation on :ByByShweta PatelShweta PatelIT 2K10 40IT 2K10 40
IntroductionIntroduction What is Bluetooth?What is Bluetooth? Bluetooth is an open wireless technologyBluetooth is an open wireless technologystandard for exchanging data over shortstandard for exchanging data over shortdistances.distances. It uses short wavelength radio transmissions.It uses short wavelength radio transmissions. It uses a wireless protocol that connectsIt uses a wireless protocol that connectselectronic devices when they are close to eachelectronic devices when they are close to eachother.other.
HistoryHistory Bluetooth is managed by the Bluetooth SpecialBluetooth is managed by the Bluetooth SpecialInterest Group (SIG).Interest Group (SIG). Created by telecom vendor Ericsson in 1994Created by telecom vendor Ericsson in 1994 It was standardized as IEEE 802.15.1It was standardized as IEEE 802.15.1 1999: Bluetooth 1.0 specification introduced.1999: Bluetooth 1.0 specification introduced. 2005: Bluetooth version 2.0 introduced.2005: Bluetooth version 2.0 introduced. 2009: Bluetooth version 3.0 introduced.2009: Bluetooth version 3.0 introduced. 2010: Bluetooth version 4.0 introduced.2010: Bluetooth version 4.0 introduced.
How it works?How it works? A master Bluetooth device can communicateA master Bluetooth device can communicatewith a maximum of seven devices inwith a maximum of seven devices ina piconet (an ad-hoc computer network usinga piconet (an ad-hoc computer network usingBluetooth technology), though not all devicesBluetooth technology), though not all devicesreach this maximum.reach this maximum.
The devices can switch roles, by agreement, andThe devices can switch roles, by agreement, andthe slave can become the masterthe slave can become the master The connection of two or more piconets formThe connection of two or more piconets forma scatternet, in which certain devicesa scatternet, in which certain devicessimultaneously play the master role in onesimultaneously play the master role in onepiconet and the slave role in another.piconet and the slave role in another.
At any given time, data can be transferred betweenAt any given time, data can be transferred betweenthe master and one other device.the master and one other device. No slaves are connected to each other.No slaves are connected to each other. The master chooses which slave device to address;The master chooses which slave device to address;typically, it switches rapidly from one device totypically, it switches rapidly from one device toanother in a round-robin fashion.another in a round-robin fashion.
PairingPairing Pairing is a bonding procedure that allows you to avoidPairing is a bonding procedure that allows you to avoidentering access information each time two devicesentering access information each time two devicesestablish a connection.establish a connection. If Secure Connection is enabled, devices will pairIf Secure Connection is enabled, devices will pairautomatically the first time they connect (a password, orautomatically the first time they connect (a password, orpasskey, must be successfully exchanged).passkey, must be successfully exchanged). When you pair two devices, they generate and store aWhen you pair two devices, they generate and store acommon link key so that you do not need to enter thecommon link key so that you do not need to enter thepasskey.passkey.
Wi-Fi is intended as a replacement to LANWi-Fi is intended as a replacement to LANwhile Bluetooth is intended as a replacement ofwhile Bluetooth is intended as a replacement ofcabling for personally carried applications.cabling for personally carried applications. Wi-Fi uses same radio frequencies as BluetoothWi-Fi uses same radio frequencies as Bluetoothbut with higher power ,resulting in higher bitbut with higher power ,resulting in higher bitrates when compared to Bluetooth.rates when compared to Bluetooth.Bluetooth v/s Wi-FiBluetooth v/s Wi-Fi
DevicesDevices LaptopsLaptops Gaming ConsolesGaming Consoles HeadsetsHeadsets Mobile PhonesMobile Phones PrintersPrinters Digital camerasDigital cameras GPS receiversGPS receivers
AdvantagesAdvantages Very easy and simple to use.Very easy and simple to use. Connection is fast and simple.Connection is fast and simple. More devices are Bluetooth capable.More devices are Bluetooth capable. Auto recognition of devices.Auto recognition of devices. Battery power requirement is low.Battery power requirement is low. Does not needs a clear line of sight betweenDoes not needs a clear line of sight betweensynced devices.synced devices.
DisadvantagesDisadvantages Speed is comparatively less to other sharingSpeed is comparatively less to other sharingdevices.(max of 1 mbps)devices.(max of 1 mbps) Since data is transferred over radio waves usingSince data is transferred over radio waves usingBluetooth, it is much easier for a hacker to breakBluetooth, it is much easier for a hacker to breakinto than secure wireless networks. For thatinto than secure wireless networks. For thatreason, Bluetooth should not be used to transferreason, Bluetooth should not be used to transferdata that needs to remain private and secure.data that needs to remain private and secure. It considerably lowers the battery life if leftIt considerably lowers the battery life if leftswitched ON on one’s device.switched ON on one’s device.
ConclusionConclusion Few flawsFew flaws SecuritySecurity Good for short transfersGood for short transfers Limitations on file sizeLimitations on file size Limitations on distanceLimitations on distance ConvenientConvenient FasterFaster More simple than flash driveMore simple than flash drive
Thank you for listening !!Thank you for listening !!Questions?Questions?
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