Bluetooth: an Introduction

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Bluetoothan Introduction

• By
• Venkateshwar rao namilakonda
• Naren Kumar chennuru

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Outline

• Bluetooth
• Comparision with other technologies
• Bluetooth architecture
• Bluetooth profiles

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What Is Bluetooth?

• Low-cost, low power, short-range radio technology
• Intended for cable replacement
• Operates in licensed exempt ISM band at 2.4ghz
• Uses frequency hoping spread spectrum
• Omni directional, no requiring line of sight
• Secure
• Extreamely popular

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Why Not Infrared?

• Intended for point to point links
• Limited to line of sight
• Low penetration power
• Distance covered is low(1 meter approx)

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Why Not 802.11?

• Intended for wireless communication
• High-cost
• High-power consumption

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Compare 802.11, Infrared, Bluetooth
Bluetooth Infrared 802.11
Connection Type Spread Spectrum Infrared, narrow beam Spread Spectrum
Spectrum 2.4GHz Optical 850 nano meters 2.4GHz
Data Rate 1Mbps 16Mbps 11Mbps
Range 30 Feet 3 Feet 300 Feet
Supported Devices Upto 8 2 Multiple
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Cont..
Voice Channels 3 1 VoIP
Data Security 8-128bit Key No special security 40/128bit key
Addressing 48 bit MAC 32 bit ID 48 bit MAC
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Bluetooth Chip
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Bluetooth Protocol Stack by SIG
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Simplified Bluetooth stack
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Bluetooth Profile Structure
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Usage Models

• Cordless computer
• Ultimate headset
• Three-in-one phone
• Interactive conference (file transfer)
• Direct network access
• Instant postcard

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Our Focus

• Bluetooth security

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References

• Wireless communications and networks
• Bluetooth.org
• WWW is our main resource