Bluetooth

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Bluetooth

  1. 1. BLUETOOTH
  2. 2. INTRODUCTION• A New technology• Bluetooth is a new short range communication device.• Why the name “Bluetooth” ?• What is Bluetooth ? -A wireless, low cost, radio solution -Designated to operate in unlicensed ISM band• Low complexity, low power• Bluetooth chip - operates between 2.4 GHz & 2.48 GHz radio freq. range - Range for communication is 10 meters-100 meters
  3. 3. FEATURES• Bluetooth transfers data at the rate of 1Mbps. This is about three times faster than parallel ports & about six times then serial ports.• Bluetooth operate at lower power levels then cellular phones. Also it alternates power saving modes to minimize power consumption,• Bluetooth has effective range of 32 feet. It can transmit voice, data, video & still images ,even under poor condition.• Bluetooth operates on the unlicensed 2.4 Ghz ISM band which is used in more than 95% of countries worldwide.
  4. 4. HOW IT WORKS ?..........• The original idea- to eliminate need of proprietary cables.• The Bluetooth chip transmits the information at a special frequency to receiver Bluetooth chip.• Bluetooth enabled electronics devices connect & communicate wirelessly via short-range network called PICONET.• In each piconet –one master devices & other slave devices.• As many as 7 active slaves & 255 parked can be connected to master device in a piconet at one time.• Active slaves can be in 3 contact mode:- Active, sniff, hold.
  5. 5. • Compared with other wireless technologies that operate in ISM frequency band, Bluetooth uses shorter data packets & a higher hop rate.• Another advantage is that it gives user the flexibility of roaming between access devices in different physical areas.• Bluetooth wireless devices can link to network, such as corporate Ethernet LAN through an “access point”, which includes Bluetooth transceiver and base band controller.• It is a circuitry to convert information from the Bluetooth format to Ethernet format and interface circuit to connect the access point to a wired network though a cable.
  6. 6. • Any Bluetooth wireless technology contains a radio unit, a base band unit and other software units.• A radio unit is a actual transceiver, which enable the wireless link between Bluetooth devices.• Bluetooth currently can have max of 1MW transmitter power allows operation over distance up to 10 meters.• The base band unit is a hardware consisting of flash memory and CPU which interface with radio unit and the host device at the hardware level.
  7. 7. • Frequency Band/ frequency jam -> The band is divided in to 79 channels, each of which has a 1 MHz bandwidth. -> To avoid signal interference FHSS sends massages in packets or chunks of data. -> In Bluetooth specifications packets are sent on different channels within the 2.4GHz bend as quickly as 1600 different hops per second. ->The Bluetooth specifications uses encryption & authentication tools to ensure security of transmitted data.• Blutooth Scatter Net many piconets together form scetternet.
  8. 8. SECURITY• MODES OF SECURITY >>No secure >>Service level secure >>Link level secure FREQUNCY-HOPPING SPREAD SPECTRUM SLAVE MASTER 2.4835 GHZ 2.4835 GHZ 2.4835 GHZ 2.4835 GHZ 2.4835 GHZBLUETOOTH DEVICE #1 BLUETOOTH DEVICE #2 DATA
  9. 9. DEVICE TRUST LEVELS• Trusted devices• Untrusted devices
  10. 10. SECURITY LEVELS • Authentication • Authorization • Encryption BLUTOOTH CAN PROVIDE INTERCONNECTION FOR LOCAL DEVICESFREQUENCYHOPING SCATTER NETSEQUENCE 2NO A 3 1 1 2 4 PICONET A PICONET B BLUETOOTH DEVICES
  11. 11. • Able to interconnect up to 8 transceivers in a point• More than 2 piconets can form scatternetSUPPORT FOR THE MULTIMEDIA TERMINAL
  12. 12. BLUETOOTH APPLICATIONS• In desktop computing• For images• In telephones• To make PAN extremely portable• To Automatically update the dataUNIQUE APPLICATION: MEDICAL USE• Prototype mobile pulse• Blood pressure sensor
  13. 13. BLUETOOTH BENEFITS• Point to multipoint capability• Operates at unlicensed frequency• Low cost• Create easy accessBLUETOOTH PROFILES• Generic Access Profile (GAP)• Service Discovery Application Profile (SDAP)• Serial Port Profile (SSP)• Generic object Exchange Profile (GOEP)
  14. 14. NEAR FUTURE• Configuration of workspace will be more efficiently implemented• Workers won’t have to continuously login/out of their computer.• Computer schedules, documents, e-mails & all other information will be synchronized whenever you go.
  15. 15. CONCLUSION• Bluetooth is set to be communication standard. Through its small size, considerable functionality & flexibility and very low cost, it will found in many modern devices offering control and information easily & simply• Thus Bluetooth will extend the scope of cellular system well beyond today’s horizons.

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