isplc05-framing-talk-final

isplc05-framing-talk-final - Efficient Framing and ARQ for...

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Efficient Framing and ARQ for High-Speed PLC Systems Srinivas Katar Larry Yonge (Intellon) srinivas.katar@intellon.com Richard Newman Haniph Latchman (Univ. of Florida) nemo@cise.ufl.edu
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PLC Evolution in a Nutshell > 5 yrs ago: Low speed control applications 1-5 yrs ago: Medium speed data transfer Now + future: High speed AV, BPL
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QoS Goals for AV PLC Data speeds - must sustain application rates of 6 Mbps per SDTV connection 24 Mbps per HDTV connection Must be QEF (quasi-error-free) for video Must meet latency requirements (10 ms for voice, 300 ms for video)
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PLC MAC High attenuation => CS but no CD Per-channel adaptation => Virtual Carrier Sense VCS => Broadcast delimiters Broadcast => high fixed OH per MPDU High PHY rates => concatenation Impulse noise….
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Framing Processes
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Powerline Characteristics High attenuation Periodic noise floor variations Isolated impulse noise Periodic impulse noise Continuous impulse noise
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Powerline Attenuation Example Typical Frequency Response
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Powerline Noise Examples Dimmer switch Hair dryer
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This note was uploaded on 01/18/2012 for the course CIS 6930 taught by Professor Staff during the Spring '08 term at University of Florida.

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isplc05-framing-talk-final - Efficient Framing and ARQ for...

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