CONDITIONAL FORWARD ERROR CORRECTION DECODING IN A PASSIVE OPTICAL NETWORK

Abstract

An optical network unit, ONU, is configured to receive a stream of forward error correction, FEC, codewords comprising at least a portion of respective downstream frames broadcasted by the OLT over the PON, the respective downstream frames including a header and a payload, the header including one or more error correction bits for error correcting the header by the ONU, and an identifier indicative for which of the one or more ONUs the payload is intended; wherein the ONU is configured to perform first, error correcting the headers of the downstream frames based on the one or more error correction bits within the respective headers; then, identifying downstream frames with a payload intended for the ONU based on the identifier within the error-corrected headers; and thereafter, FEC decoding the one or more FEC codewords that comprise at least a portion of the identified downstream frames.

CPC Classifications