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 IBM, Intel, Ericsson, Nokia, Microsoft…… Why Danish King - Harald Bluetooth What Short range (10 meters) Frequency-hopping radio link

Outline What is “Bluetooth” Characteristic

Features 2.4GHz Range : 0.1~100 meters Low power

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

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

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

Topology PiconetScatternet

States Standby InquiryPage Connected

Modes FastestSlowestResponsiveness HighestLowest Power Consumption ActiveSniff/HoldPark

Transport Protocol

Outline Characteristic Security

Frequency hopping Stream cipher EO

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.

Outline Security Comparison

Bluetooth V.S IrDA Convenience Radio wave V.S Infrared light Range meters V.S 1 meter Data rate 1 Mbps V.S 4 Mbps

Power 100 mW V.S 10 mW Safety Price $5.00 V.S <$1.00

Outline Comparison Application/ Conclusion

Bluetooth Products Mobile Phones

Bluetooth Products Computer Equipment

Bluetooth Products Home Environment

Bluetooth Products Automotive

Bluetooth Products Headset

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