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Bluetooth an introduction


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Bluetooth an introduction

  1. 1. What is Bluetooth › Launched by a special interest group(SIG) in May 1998. › Low cost › Short Range › Sharing
  2. 2. SIG› Ericsson› IBM› Intel› Nokia› Toshiba
  3. 3. AIM› To provide wireless› Low cost› Simple interface› To avoid line-of-sight connection
  4. 4. How It Works….?› It communicates on a frequency of 2.45 Ghz (ISM)› spread-spectrum frequency hopping.
  5. 5. How It Works….? Operational States D Master F N M Active Slave Parked Slave* Standby* P O * Low power state J I Q C
  6. 6. In the beginning D F N H G M A P B O E K J L I Q C
  7. 7. Inquiry Note that a device can be “Undiscoverable” D F N H G M A P B O E K J L I Q C 10 meters
  8. 8. Paging or Creating a Piconet D F N H G M AA P B B O E K J L I Q C 10 meters
  9. 9. Expanding a Piconet D F N H G G M A P B O E K K J L I Q C 10 meters
  10. 10. Scatternets D F H G M N A B O P E K J L I C Q
  11. 11. Protocol Architecture 8 Applications RFCOMM/SDP/TCS/SDP L2CAP HCI Link Manager Link Controller Baseband 1 Radio
  12. 12. Characteristics› Allows up to 8 devices to communicate.› Three classes of Bluetooth devices ‹ Class 3 – have a range of up to 1 meter or 3 Feet. ‹ Class 2 – have a range of 10 meters or 30 feet ‹ Class 1 – have a range of 100 meters or 300 feet
  13. 13. Advantages› Wireless (No Cables)› Inexpensive› No Setup Needed› Low Power Consumption (1 Milliwatt)› Industry Wide Support› Multiple simultaneous wireless connections› Small form factor
  14. 14. Disadvantage› Short range (10 - 100 meters)› Small throughput rate ‹ 1.0v - 1.0 Mbps ‹ 2.0v - 3.0 Mbps
  15. 15. Comparison
  16. 16. Bluetooth Enabled Devices › Laptops › Cellular phones › Personal Digital Assistants › Headsets › Printers › Keyboards/mice › GPS, etc…
  17. 17. CONCLUSION• With its relatively low implementation costs, Bluetooth technology seems destined to dominate the electronic landscape, as humans worldwide will be able to form personal area networks with devices and completely simplify the way in which they interact with electronic tools and each other.• In the years to come, Bluetooth will become a worldwide connectivity among electronic devices, leading to applications unthinkable by today’s technological standards. Because the radio frequency used is globally available, Bluetooth can offer fast and secure connectivity all over the world.