Using shortened codewords in passive optical networks

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United States of America Patent

PATENT NO 11909523
APP PUB NO 20230224074A1
SERIAL NO

17573930

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ATTORNEY / AGENT: (SPONSORED)

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Abstract

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An upstream (US) optical line terminal (OLT) for a passive optical network having at least one downstream (DS) optical network unit (ONU). The OLT generates a trigger signal indicating a need to receive at least one US burst having a shortened codeword for a first forward error-correction (FEC) code. Based on the trigger signal, the OLT transmits a DS message instructing the ONU to transmit an US burst having a shortened codeword. The OLT receives and decodes the US burst having the shortened codeword using the first FEC code. During periods of high bit-error rate, the shortened codewords increase the ability of the OLT to decode the US bursts and keep communications from the ONU alive. The OLT can use the decoded US bursts to measure BER and, if appropriate, instruct the ONU to use a different FEC code.

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Patent Owner(s)

Patent OwnerAddress
NOKIA SOLUTIONS AND NETWORKS OYESPOO FINLAND ESPOO SOUTHERN FINLAND

International Classification(s)

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Lefevre, Yannick Heverlee, BE 26 44
Mahadevan, Amitkumar Edison, US 49 385
Van, Hoof Werner Aartselaar, BE 12 50

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