logging in or signing up Bluetooth aleenakazmi Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 844 Category: Science & Tech.. License: All Rights Reserved Like it (1) Dislike it (0) Added: February 09, 2011 This Presentation is Public Favorites: 4 Presentation Description No description available. Comments Posting comment... By: jacks11 (8 month(s) ago) nic Saving..... Post Reply Close Saving..... Edit Comment Close By: gailygopi (8 month(s) ago) nice ppt Saving..... Post Reply Close Saving..... Edit Comment Close By: harishbabu60 (8 month(s) ago) nice ppt Saving..... Post Reply Close Saving..... Edit Comment Close By: computechcomputers (10 month(s) ago) how to download this prentation Saving..... Post Reply Close Saving..... Edit Comment Close By: computechcomputers (10 month(s) ago) nice Saving..... Post Reply Close Saving..... Edit Comment Close loading.... See all Premium member Presentation Transcript Bluetooth in a glance : Bluetooth in a glance s sWhat is Bluetooth ?: What is Bluetooth ? Bluetoothta is a technology which establish communication in a specific radio frequency range. It communicates on a frequency of 2.45 gigahertz (actually between 2.402 GHz and 2.480 GHz, to be exact). This frequency band has been set by international agreement for the use of industrial, scientific and medical devices (ISM).It is ratified as IEEE Standard 802.15.1-2002.Why is it called Bluetooth?: Why is it called Bluetooth? Harald Bluetooth was king of Denmark and research on blue tooth is also done in this country that’s why it is called BluetoothRadio Specification: Radio SpecificationBluetooth Versions: Bluetooth VersionsBluetooth Application Areas: 02/29/00 P. Bhagwat (IBM Research) 7 Bluetooth Application Areas Internet,Data and voice access Internet Real-time voice and data transmissions Cable replacement Eliminates need for numerous cable attachments for connection Ad hoc networking Device with Bluetooth radio can establish connection with another when in rangeAuto Synchronization: 02/29/00 P. Bhagwat (IBM Research) 8 Auto Synchronization User benefits Automatic synchronization of calendars, address books, business cards Push button synchronization Proximity operationFlexible Transmission: 02/29/00 P. Bhagwat (IBM Research) 9 Flexible Transmission Most of the time, a network or communications method either works in one direction at a time, called half-duplex communication, or in both directions simultaneously, called full-duplex communication. A speakerphone that lets you either listen or talk, but not both, is an example of half-duplex communication, while a regular telephone handset is a full-duplex device. Because Bluetooth is designed to work in a number of different circumstances, it can be either half-duplex or full-duplex.Piconets or PAN(Personal Area Network): 02/29/00 P. Bhagwat (IBM Research) 10 Piconets or PAN(Personal Area Network) A piconet is the type of connection that is formed between two or more Bluetooth-enabled devices such as modern cell phones or PDAs. Bluetooth enabled devices are "peer units" in that they are able to act as either master or slave. However, when a piconet is formed between two or more devices, one device takes the role of 'master', and all other devices assume a 'slave' role for synchronization reasons. Piconets have a 3-bit address space, which limits the maximum size of a piconet to 8 devices (23 = 8), i.e. 1 master and 7 slaves.Scatternet: 02/29/00 P. Bhagwat (IBM Research) 12 ScatternetScatternet: 02/29/00 P. Bhagwat (IBM Research) 13 Scatternet A scatternet is a type of ad-hoc computer network consisting of two or more piconets. Both of the terms 'scatternet' and 'piconet' are typically applied to Bluetooth wireless technology.Frequency Hopping in Bluetooth: 02/29/00 P. Bhagwat (IBM Research) 14 Frequency Hopping in Bluetooth Total bandwidth divided into 1MHz physical channels FH occurs by jumping from one channel to another in pseudorandom sequence Hopping sequence shared with all devices on piconet Piconet access: Bluetooth devices use time division duplex (TDD) Access technique is TDMA FH-TDD-TDMABluetooth Standards Documents: 02/29/00 P. Bhagwat (IBM Research) 15 Bluetooth Standards Documents Core specifications Details of various layers of Bluetooth protocol architecture Profile specifications Use of Bluetooth technology to support various applicationsBluetooth layered Protocol Architecture: 02/29/00 P. Bhagwat (IBM Research) 17 Bluetooth layered Protocol Architecture Core protocols Radio : Specifies the detail of air inter face,including frequency,the use of frequency hooping,modulation scheme and transmitting power.Addressing: 02/29/00 P. Bhagwat (IBM Research) 21 Addressing Bluetooth device address (BD_ADDR) 48 bit IEEE MAC address Active Member address (AM_ADDR) 3 bits active slave address all zero broadcast address Parked Member address (PM_ADDR) 8 bit parked slave addressApplications: 02/29/00 P. Bhagwat (IBM Research) 27 Applications Various adopted protocols are also used at application level. PPP(Point to point protocol)Internet standard protocol for transporting IP datagram over a point to point link. TCP/UDP/IP : These are the foundation protocols of the TCP/IP protocol suite WAE/WAP:Bluetooth inter operates the wireless application environment and the wireless application protocol into its architecture.Packet Format: 02/29/00 P. Bhagwat (IBM Research) 29 Packet Format Access code – used for timing synchronization, offset compensation, paging, and inquiry Header – used to identify packet type and carry protocol control information Payload – contains user voice or data and payload header, if presentBluetooth Security Issues: 02/29/00 P. Bhagwat (IBM Research) 30 Bluetooth Security Issues Bluejacking involves Bluetooth users sending a business card (just a text message, really) to other Bluetooth users within a 10-meter (32-foot) radius. If the user doesn't realize what the message is, he might allow the contact to be added to his address book, and the contact can send him messages that might be automatically opened because they're coming from a known contact.Bluetooth Security Issues: 02/29/00 P. Bhagwat (IBM Research) 31 Bluetooth Security Issues Bluebugging is more of a problem, because it allows hackers to remotely access a user's phone and use its features, including placing calls and sending text messages, and the user doesn't realize it's happening.Bluetooth Security Issues: 02/29/00 P. Bhagwat (IBM Research) 32 Bluetooth Security Issues Car Whisperer is a piece of software that allows hackers to send audio to and receive audio from a Bluetooth-enabled car stereo. Like a computer security hole, these vulnerabilities are an inevitable result of technological innovation, and device manufacturers are releasing firmware upgrades that address new problems as they arise. Bluetooth Security Measures: 02/29/00 P. Bhagwat (IBM Research) 33 Bluetooth Security Measures Service-level security and device-level security work together to protect Bluetooth devices from unauthorized data transmission. Security methods include authorization and identification procedures that limit the use of Bluetooth services to the registered user and require that users make a conscious decision to open a file or accept a data transferReferences:: 02/29/00 P. Bhagwat (IBM Research) 34 References: http://en.wikipedia.org/wiki/Scatternet http://en.wikipedia.org/wiki/Bluetooth http://en.wikipedia.org/wiki/Piconet http://electronics.howstuffworks.com/bluetooth2.htm www.austriamicrosystems.comAny Q?: 02/29/00 P. Bhagwat (IBM Research) 35 Any Q? You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
Bluetooth aleenakazmi Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: (To copy code, click on the text box) Embed: URL: Thumbnail: WordPress Embed Customize Embed The presentation is successfully added In Your Favorites. Views: 844 Category: Science & Tech.. License: All Rights Reserved Like it (1) Dislike it (0) Added: February 09, 2011 This Presentation is Public Favorites: 4 Presentation Description No description available. Comments Posting comment... By: jacks11 (8 month(s) ago) nic Saving..... Post Reply Close Saving..... Edit Comment Close By: gailygopi (8 month(s) ago) nice ppt Saving..... Post Reply Close Saving..... Edit Comment Close By: harishbabu60 (8 month(s) ago) nice ppt Saving..... Post Reply Close Saving..... Edit Comment Close By: computechcomputers (10 month(s) ago) how to download this prentation Saving..... Post Reply Close Saving..... Edit Comment Close By: computechcomputers (10 month(s) ago) nice Saving..... Post Reply Close Saving..... Edit Comment Close loading.... See all Premium member Presentation Transcript Bluetooth in a glance : Bluetooth in a glance s sWhat is Bluetooth ?: What is Bluetooth ? Bluetoothta is a technology which establish communication in a specific radio frequency range. It communicates on a frequency of 2.45 gigahertz (actually between 2.402 GHz and 2.480 GHz, to be exact). This frequency band has been set by international agreement for the use of industrial, scientific and medical devices (ISM).It is ratified as IEEE Standard 802.15.1-2002.Why is it called Bluetooth?: Why is it called Bluetooth? Harald Bluetooth was king of Denmark and research on blue tooth is also done in this country that’s why it is called BluetoothRadio Specification: Radio SpecificationBluetooth Versions: Bluetooth VersionsBluetooth Application Areas: 02/29/00 P. Bhagwat (IBM Research) 7 Bluetooth Application Areas Internet,Data and voice access Internet Real-time voice and data transmissions Cable replacement Eliminates need for numerous cable attachments for connection Ad hoc networking Device with Bluetooth radio can establish connection with another when in rangeAuto Synchronization: 02/29/00 P. Bhagwat (IBM Research) 8 Auto Synchronization User benefits Automatic synchronization of calendars, address books, business cards Push button synchronization Proximity operationFlexible Transmission: 02/29/00 P. Bhagwat (IBM Research) 9 Flexible Transmission Most of the time, a network or communications method either works in one direction at a time, called half-duplex communication, or in both directions simultaneously, called full-duplex communication. A speakerphone that lets you either listen or talk, but not both, is an example of half-duplex communication, while a regular telephone handset is a full-duplex device. Because Bluetooth is designed to work in a number of different circumstances, it can be either half-duplex or full-duplex.Piconets or PAN(Personal Area Network): 02/29/00 P. Bhagwat (IBM Research) 10 Piconets or PAN(Personal Area Network) A piconet is the type of connection that is formed between two or more Bluetooth-enabled devices such as modern cell phones or PDAs. Bluetooth enabled devices are "peer units" in that they are able to act as either master or slave. However, when a piconet is formed between two or more devices, one device takes the role of 'master', and all other devices assume a 'slave' role for synchronization reasons. Piconets have a 3-bit address space, which limits the maximum size of a piconet to 8 devices (23 = 8), i.e. 1 master and 7 slaves.Scatternet: 02/29/00 P. Bhagwat (IBM Research) 12 ScatternetScatternet: 02/29/00 P. Bhagwat (IBM Research) 13 Scatternet A scatternet is a type of ad-hoc computer network consisting of two or more piconets. Both of the terms 'scatternet' and 'piconet' are typically applied to Bluetooth wireless technology.Frequency Hopping in Bluetooth: 02/29/00 P. Bhagwat (IBM Research) 14 Frequency Hopping in Bluetooth Total bandwidth divided into 1MHz physical channels FH occurs by jumping from one channel to another in pseudorandom sequence Hopping sequence shared with all devices on piconet Piconet access: Bluetooth devices use time division duplex (TDD) Access technique is TDMA FH-TDD-TDMABluetooth Standards Documents: 02/29/00 P. Bhagwat (IBM Research) 15 Bluetooth Standards Documents Core specifications Details of various layers of Bluetooth protocol architecture Profile specifications Use of Bluetooth technology to support various applicationsBluetooth layered Protocol Architecture: 02/29/00 P. Bhagwat (IBM Research) 17 Bluetooth layered Protocol Architecture Core protocols Radio : Specifies the detail of air inter face,including frequency,the use of frequency hooping,modulation scheme and transmitting power.Addressing: 02/29/00 P. Bhagwat (IBM Research) 21 Addressing Bluetooth device address (BD_ADDR) 48 bit IEEE MAC address Active Member address (AM_ADDR) 3 bits active slave address all zero broadcast address Parked Member address (PM_ADDR) 8 bit parked slave addressApplications: 02/29/00 P. Bhagwat (IBM Research) 27 Applications Various adopted protocols are also used at application level. PPP(Point to point protocol)Internet standard protocol for transporting IP datagram over a point to point link. TCP/UDP/IP : These are the foundation protocols of the TCP/IP protocol suite WAE/WAP:Bluetooth inter operates the wireless application environment and the wireless application protocol into its architecture.Packet Format: 02/29/00 P. Bhagwat (IBM Research) 29 Packet Format Access code – used for timing synchronization, offset compensation, paging, and inquiry Header – used to identify packet type and carry protocol control information Payload – contains user voice or data and payload header, if presentBluetooth Security Issues: 02/29/00 P. Bhagwat (IBM Research) 30 Bluetooth Security Issues Bluejacking involves Bluetooth users sending a business card (just a text message, really) to other Bluetooth users within a 10-meter (32-foot) radius. If the user doesn't realize what the message is, he might allow the contact to be added to his address book, and the contact can send him messages that might be automatically opened because they're coming from a known contact.Bluetooth Security Issues: 02/29/00 P. Bhagwat (IBM Research) 31 Bluetooth Security Issues Bluebugging is more of a problem, because it allows hackers to remotely access a user's phone and use its features, including placing calls and sending text messages, and the user doesn't realize it's happening.Bluetooth Security Issues: 02/29/00 P. Bhagwat (IBM Research) 32 Bluetooth Security Issues Car Whisperer is a piece of software that allows hackers to send audio to and receive audio from a Bluetooth-enabled car stereo. Like a computer security hole, these vulnerabilities are an inevitable result of technological innovation, and device manufacturers are releasing firmware upgrades that address new problems as they arise. Bluetooth Security Measures: 02/29/00 P. Bhagwat (IBM Research) 33 Bluetooth Security Measures Service-level security and device-level security work together to protect Bluetooth devices from unauthorized data transmission. Security methods include authorization and identification procedures that limit the use of Bluetooth services to the registered user and require that users make a conscious decision to open a file or accept a data transferReferences:: 02/29/00 P. Bhagwat (IBM Research) 34 References: http://en.wikipedia.org/wiki/Scatternet http://en.wikipedia.org/wiki/Bluetooth http://en.wikipedia.org/wiki/Piconet http://electronics.howstuffworks.com/bluetooth2.htm www.austriamicrosystems.comAny Q?: 02/29/00 P. Bhagwat (IBM Research) 35 Any Q?