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BLUETOOTH

BLUETOOTH. 第七組 王文道. Outline. What is “Bluetooth” Characteristic Security Comparison Application/ Conclusion. Wireless World. IEEE 802.1X Home RF GSM 、 GPRS 、 3G ZigBee IrDA Bluetooth. About Bluetooth……. Where SIG ,founded in September 1998

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BLUETOOTH

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  1. BLUETOOTH 第七組 王文道

  2. Outline • What is “Bluetooth” • Characteristic • Security • Comparison • Application/ Conclusion

  3. Wireless World • IEEE 802.1X • Home RF • GSM、GPRS、3G • ZigBee • IrDA • Bluetooth

  4. About Bluetooth…… • Where SIG ,founded in September 1998 IBM, Intel, Ericsson, Nokia, Microsoft…… • Why Danish King - Harald Bluetooth • What Short range (10 meters) Frequency-hopping radio link

  5. Outline • What is “Bluetooth” • Characteristic

  6. Features • 2.4GHz • Range : 0.1~100 meters • Low power

  7. Features • GFSK (Gaussian Frequency Shift Key) • TDMA (Time Division Multiple Access) • FHSS (Frequency Hopping Spread Spectrum)

  8. FHSS • 79 (23)channels • Each one is 1MHz • Hopping 1600/s

  9. Features • Max Bandwidth: 1Mb/s • Average Rate: 720kb/s • 1 Master connect to 7 Active Mode Slave ( or 255 Standby Mode ones ) to from a Piconet • Extension : Piconet -> Scatternet

  10. Topology Piconet Scatternet

  11. States Inquiry Page Connected Standby

  12. Fastest Responsiveness Slowest Active Sniff/Hold Park Power Consumption Highest Lowest Modes

  13. Transport Protocol

  14. Outline • Characteristic • Security

  15. Security • Frequency hopping • Stream cipher EO

  16. Security • Mode1: no security. 應用於不重要的資料 • Mode2: service level-enforced security.富有彈性, 建立連線後才根據應用的不同來決定安全性的高低. • Mode3: link level-enforced security. 在建連結時就會啟用安全模式, 如果沒有通過則連結不會被建立.

  17. Outline • Security • Comparison

  18. Bluetooth V.S IrDA • Convenience Radio wave V.S Infrared light • Range 0.1-100 meters V.S 1 meter • Data rate 1 Mbps V.S 4 Mbps

  19. Bluetooth V.S IrDA • Power 100 mW V.S 10 mW • Safety • Price $5.00 V.S <$1.00

  20. Outline • Comparison • Application/ Conclusion

  21. Bluetooth Products • Mobile Phones

  22. Bluetooth Products • Computer Equipment

  23. Bluetooth Products • Home Environment

  24. Bluetooth Products • Automotive

  25. Bluetooth Products • Headset

  26. THE END

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