bluetooth
DESCRIPTION
History of Bluetooth, BT Standards, BT how it work?TRANSCRIPT
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Instructor: Dr. Saed TARAPIAH
Communication Engineering Department
Fall 2012
An-Najah National University
Bluetooth 802.15.x
1
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A cable replacement technology.
Up to 3Mb/s (data rate)
Range 10+ meters
Single ship technology Low cost
Low power
Bluetooth
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Why not using WLAN? Cost Power
Why not using irDA? LOS (Line Of Sight) Short distance range
(1m)
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The Bluetooth Idea
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IEEE 802.15 working group
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Basic Characteristics
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Design consideration of Bluetooth. High bandwidth
Conserve battery power (low power consumption)
Cost < 10$ (low cost)
Robust system (radio interference)
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Unlicensed Radio Spectrum (USA)
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Bluetooth Radio Link
7
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Network Architecture
8
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An Example
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Application Scenarios
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Bluetooth specification
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Bluetooth Radio
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Spread Spectrum
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Radio channel
13
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Frequency Hopping (FH)
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Both sender and receiver know the sequence of frequencies
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Piconet Synchronization
15
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Piconet Synchronization
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Adaptive frequency hopping (AFH) Bluetooth 1.1
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Bluetooth Physical Links
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Bluetooth Formation
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Bluetooth Formation
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Addressing
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Physical channel
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Piconet channel
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Channel access
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Multi-slot packets
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Physical links types
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SCO
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SCO
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eSCO (Bluetooth V1.1)
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ACL
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ACL
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Packet types
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Packet format (basic rate)
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Packet format (basic rate)
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Packet format (basic rate)
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Access code
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Header
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Control packet
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HV packet
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HV packet
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EV packets (Bluetooth v1.1)
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EV packets (Bluetooth v1.1)
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DH and DM packets
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2-DH and 3-DH packets (Bluetooth v2.0)
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Rate calculation DM/H1
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Rate calculation DM/H3
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Rate calculation 3-DH5
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Mixed-link example
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Inquiry
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Inquiry procedure
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Inquiry timing
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