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US 2014/0181616 A1Published application
System and method for implementing multiple fec encoding profiles
AssigneeCortina Systems, Inc.
InventorVenkat ARUNARTHI
Life of this patent
Estimating the term…
Abstract
Systems and methods for FEC encoding, for example for 10GEPON are provided. For the upstream or downstream, multiple FEC encoding and decoding profiles are implemented that include various levels of FEC encoding. Then, for a given ONU, a selection between these FEC encoding profiles is made. The OLT can instruct the ONU which FEC encoding profile to use for upstream, and which FEC decoding profile to use for downstream.
Claims33
An optical network comprising:
- an OLT (optical line terminal), the OLT configured to implement at least two encoding profiles comprising a first FEC (forward error correction) encoding profile that comprises FEC encoding, and a second FEC encoding profile that comprises FEC encoding with a weaker encoding than the first FEC encoding profile or that performs no FEC encoding;
- at least two ONUs (optical network units), each ONU configured to implement at least two decoding profiles comprising a first FEC decoding profile corresponding to the first FEC encoding profile, and a second FEC decoding profile corresponding to the second FEC encoding profile;
- the OLT is configured to transmit FEC encoding information that indicates which downstream burst(s) are to be encoded using which FEC encoding profile;
- the OLT configured to transmit a plurality of downstream bursts, each downstream burst comprising content for at least one ONU of the at least two ONUs, wherein each downstream burst is transmitted using one of the FEC encoding profiles consistent with the transmitted FEC encoding information;
- each ONU is configured to receive the plurality of downstream bursts by receiving each burst using the decoding profile indicated by the FEC encoding information.
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11-15. (canceled)
18-63. (canceled)
An OLT comprising:
- FEC decoding circuitry configured to implement at least two decoding profiles comprising a first FEC decoding profile and a second FEC decoding profile, wherein the second FEC decoding profile contains FEC decoding of a code weaker than a code decoded by the first FEC decoding profile;
- the OLT is configured to transmit FEC encoding information that indicates which upstream burst(s) are to be encoded using which encoding profile;
- the OLT is configured to receive the plurality of upstream bursts by receiving each burst using one of the FEC decoding profiles consistent with the transmitted FEC encoding information.
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71-75. (canceled)
An optical network unit (ONU) comprising:
- an FEC encoder;
- the ONU is configured to receive FEC encoding information that indicates whether to use the FEC encoder or not for upstream burst transmission and to transmit a plurality of upstream bursts, wherein each upstream burst is transmitted using one of the encoding profiles as indicated by the FEC encoding information.
81-88. (canceled)
An integrated circuit comprising:
- FEC decoding circuitry configured to implement at least two decoding profiles comprising a first FEC decoding profile and a second FEC decoding profile, wherein the second FEC decoding profile either contains no FEC decoding or contains FEC decoding of a code weaker than a code decoded by the first FEC decoding profile;
- wherein the integrated circuit is configured to receive FEC encoding information that indicates which downstream burst(s) are to be encoded using which encoding profile;
- the ONU is configured to process a plurality of downstream bursts by processing each burst using the decoding profile indicated by the FEC encoding information.
- FEC encoding circuitry configured to implement at least two encoding profiles comprising a first FEC encoding profile that comprises FEC encoding, and a second FEC encoding profile that comprises FEC encoding with a weaker encoding than the first FEC encoding profile or that performs no FEC encoding;
- wherein the circuit is configured to receive FEC encoding information that indicates which encoding profile to use for upstream burst transmission and to generate a plurality of upstream bursts, wherein each upstream burst is generated using one of the encoding profiles as indicated by the FEC encoding information.
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An ONU (optical network unit) comprising:
- FEC decoding means;
- FEC encoding information receiving means for receiving FEC encoding information that indicates which whether to apply FEC decoding to downstream burst(s);
- downstream burst reception means for receiving downstream bursts;
- wherein the FEC decoding means decodes each received downstream burst or not in accordance with the FEC encoding information.
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Dependencies are inferred from the claim text.