IEEE 802.15.4
Wireless MAC and PHY
Specifications for Low-Rate WPANs
Witsarawat Chantaweesomboon
Reference
Document IEEE Std 802.15.4-2006, Part 15.4: Wireless
Medium Access Control (MAC) and Physical Layer (PHY)
Specification for Low-Rate Wireless Personal Area
Networks (WPANs), IEEE Computer Society, September
2006
Overview (1)
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WPANs
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Convey information over short distances.
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Involve little or no infrastructure.
•
IEEE 802.15.4 defines the MAC and PHY for
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Low-data rate wireless connectivity
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Fixed and moving devices
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Devices with no battery or very limited battery
consumption
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Devices in operating space of ~10m
Introduction (5.1)
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Low-rate WPAN characteristics
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Data rates of 250, 100, 40, and 20 kb/s
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Star or peer-to-peer operation
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16-bit (short) or 64-bit (extended) addresses
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CSMA-CA
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ACK
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Low-power
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Energy detection
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Link quality indication
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16 channels in 2.4 GHz, 30 in 915 MHz, and 3 in
868 MHz
Introduction (5.1)
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2 different device types
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Full-function device (FFD) operating in 3 modes:
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A PAN coordinator
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A coordinator
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A device
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Reduced-function device (RFD)
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Simple application
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Associates with a single FFD at a time.
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Uses minimal resources and memory capacity.
