PHYSICAL-LAYER CONTROL CHANNEL STRUCTURE

摘要

A coax network unit (CNU) coupled to a coax line terminal (CLT) receives a plurality of orthogonal frequency-division multiplexing (OFDM) symbols from the CLT and identifies a start-of-frame delimiter on a physical-layer (PHY) control channel in the plurality of OFDM symbols. The PHY control channel includes a plurality of contiguous subcarriers. The CNU decodes one or more forward error correction (FEC) code words that follow the start-of-frame delimiter on the PHY control channel. The one or more FEC code words provide PHY control data that include information specifying a structure of a PHY frame that includes the plurality of OFDM symbols.

主权项

1. A method of data communication, comprising:
at a coax network unit (CNU) coupled to a coax line terminal (CLT):
receiving a plurality of orthogonal frequency-division multiplexing (OFDM) symbols;identifying a start-of-frame delimiter on a physical-layer (PHY) control channel in the plurality of OFDM symbols, the PHY control channel comprising a plurality of contiguous subcarriers; anddecoding one or more forward error correction (FEC) code words that follow the start-of-frame delimiter on the PHY control channel, the one or more FEC code words providing PHY control data that comprise information specifying a structure of a PHY frame that includes the plurality of OFDM symbols.