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Blue tooth

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Blue tooth

  1. 1. Bluetooth <br />By K.Gautam<br />
  2. 2. What is BlueTooth?<br /><ul><li>Bluetooth is a proprietary open wireless technology standard for exchanging data over short distances
  3. 3. Targets ad-hoc piconets </li></li></ul><li>The Name<br /><ul><li>It is named after Harald Gormsen, King of Denmark (10 th century AD)
  4. 4. It was so named because the designer at Erricson Liked vikings</li></li></ul><li>Wireless Personal Area Networks(WPAN) <br /><ul><li>Criteria:
  5. 5. Market potential
  6. 6. Compatibility
  7. 7. Distinct identity
  8. 8. Technical feasibility
  9. 9. Economic feasibility </li></li></ul><li>User scenarios <br /><ul><li>Connection of peripheral devices
  10. 10. Support of ad-hoc networking
  11. 11. Bridging of networks </li></li></ul><li>Architecture <br /><ul><li>Networking
  12. 12. Bluetooth operates on 79 channels in the 2.4 GHz
  13. 13. 1 MHz carrier spacing
  14. 14. Piconet
  15. 15. One acts as master (M),
  16. 16. Other devices act as slave (S)
  17. 17. One Master and upto 7 slaves</li></li></ul><li>Piconet<br />
  18. 18. Protocol stack<br /><ul><li>Two types of specifications
  19. 19. Core specification
  20. 20. Describes physical layer to the data link control together with management functions
  21. 21. Profile specifications
  22. 22. Describes many protocols and functions needed to adapt the wireless Bluetooth technology to legacy and new applications </li></li></ul><li>Protocol stack<br />
  23. 23. Protocol stack<br /><ul><li>Radio: Specification of the air interface, i.e., frequencies, modulation, and transmit power
  24. 24. Baseband: Description of basic connection establishment, packet formats, timing, and basic QoS parameters
  25. 25. Link manager protocol: Link set-up and management between devices including security functions and parameter negotiation
  26. 26. Logical link control and adaptation protocol (L2CAP): Adaptation of higher layers to the baseband </li></li></ul><li>Protocol stack<br /><ul><li>Service discovery protocol: Device discovery in close proximity plus querying of service characteristics </li></li></ul><li>Radio layer <br /><ul><li>Factors :
  27. 27. Battery power
  28. 28. license-free frequency band at 2.4 GHz
  29. 29. A frequency-hopping/time-division duplex scheme
  30. 30. fast hopping rate of 1,600 hops per second</li></li></ul><li>Radio layer <br /><ul><li>Power class 1: Maximum power is 100 mW and minimum is 1 mW (typ. 100 m range without obstacles). Power control is mandatory.
  31. 31. Power class 2: Maximum power is 2.5 mW, nominal power is 1 mW, and minimum power is 0.25 mW
  32. 32. (typ. 10 m range without obstacles). Power control is optional.
  33. 33. Power class 3: Maximum power is 1 mW. </li></li></ul><li> Baseband layer <br />
  34. 34. Packet Format<br />
  35. 35. For Further reference <br /><ul><li>Wikipedia http://en.wikipedia.org/wiki/Bluetooth
  36. 36. Page 269 of Mobile Communications by Jochen Schiller</li>

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