part_6b_HP10_MAC - HomePlug 1.0 MAC R. Newman University of...

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Unformatted text preview: HomePlug 1.0 MAC R. Newman University of Florida What is HomePlug 1.0? Broadband PLC for home networking Open industry standard 4 manufacturers (including Intellon) Developed in 2000 by Homeplug Powerline Alliance (HPA) Consortium of chip designers, OEMs, PLC users Products shipped in 2001 First ethernet class PLC, most widely available 11 Mbps coded PHY data rate 0ver 10 million units shipped Comprises PHY modulation, coupling, FEC, etc. MAC medium access, ARQ, etc. Bridging to other PLC networks or to 803.3/11/etc. HomePlug 1.0 MAC Overview Frame Transport Frame length = 46-1500 bytes/frame IEEE 802.3 frames encapsulated IEEE 802.3 48-bit addressing used Bridging between PLC and other networks Reliable Frame Delivery Rate adaptive PHY Channel estimation and tone map generation Stop&Wait ARQ for unicast frames Partial ACK for multicast frames Segmentation to limit time exposed on wire HP 1.0 MAC Overview (cont) Quality of Service 4 priority levels for differentiated service Priority signaling slots enforce priority access Segmentation bounds delay Bursting for contention-free access Privacy 56-bit key DES encryption in CBC mode Password-based key derivation supported Management Registered ethertype for management data HP1.0 MAC CSMA/CA Virtual Carrier Sense - length in FC 4 levels of priority for differentiated service Advanced contention resolution Variable tone map, including code rate selection Packets of ~0.5ms to ~2ms Packet bursting to avoid contention Stop&Wait ARQ 56-bit DES in CBC mode for privacy Bridging function HP1.0 PHY PDU Preamble = 38.4 usec Set pattern of 7.5 special symbols Allows AGI, synchronization by receiver Detection used for PCS Frame Control (FC) = 33.6 usec. (4 symbols) Heavily coded Uses BPSK (low rate) modulation Very robust Very few (25) information bits FC holds info for PHY Tone Map Index- for demodulation of body Frame duration (how long to demodulate ) HP1.0 PHY Frame Format Detect delimiter from preamble, correct FC SOF FC indicates symbol count, tone map Pad Frame Body to PHY Tx block boundary EOF FC delimits end of data frame Preamble Frame Control Frame Header Frame Body PAD FCS Preamble Frame Control RIFS Preamble Frame Control 25 bits 17 bytes Variable Byte Count 2 bytes 25 bits 25 bits 4 OFDM symbol 4 OFDM symbol Start of frame delimeter ( uses all tones ) Frame header Frame body and pad Check sequence End of frame delimeter ( uses all tones ) Response delimeter ( uses all tones ) 4 OFDM symbol Variable symbol count 20 - 160 OFDM symbols FC indicates modulation and length EFG HP1.0 Delimiters Delimiter Preamble + frame control = 72.0 usec FC holds 25 bits of information 1 bit contention control (CC) 3 bits delimiter type (DT)...
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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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part_6b_HP10_MAC - HomePlug 1.0 MAC R. Newman University of...

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