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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……
WhereSIG ,founded in September 1998IBM, Intel, Ericsson, Nokia, Microsoft…… WhyDanish King - Harald Bluetooth WhatShort 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
Piconet Scatternet
States
Standby
Inquiry Page
Connected
Modes
Fastest SlowestResponsiveness
Highest LowestPower Consumption
Active Sniff/Hold Park
Transport Protocol
Outline
Characteristic Security
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
0.1-100 meters V.S 1 meter Data rate
1 Mbps V.S 4 Mbps
Bluetooth V.S IrDA
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
THE END
