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US 8,798,461 B2Granted
System and method for channel-adaptive error-resilient transmission to multiple transceivers
AssigneeAlcatel Lucent
InventorAdriaan J. de Lind van Wijngaarden
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Abstract
In a passive optical network, a downstream transmission rate from an OLT to multiple ONTs can be optimized by matching a transmission scheme for frames addressed to a channel to the downstream transmission characteristics of the channel. An FEC coding can be made channel dependent so that channels with low error rates can use minimal protection, and therefore minimal overhead, while channels with high input bit error rates can use the level of FEC coding required to produce a desired output bit error rate.
Claims17
A method, comprising:
- determining downstream transmission characteristics for at least one channel between at least one optical line termination device and a plurality of optical network units, wherein determining the downstream transmission characteristics of the at least one channel comprises:
- applying a forward error correction code to one or more frames transmitted downstream on the at least one channel;
- and
- counting a number of errors corrected in the one or more frames;
- configuring at least one transmission scheme for the at least one channel, the transmission scheme dependent on the downstream transmission characteristics of the at least one channel;
- and
- performing downstream transmissions from the at least one optical line termination device on the at least one channel.
4 more elements
An optical line termination device configured to:
- determine downstream transmission characteristics for at least one channel between an optical line termination device and an optical network unit, wherein a forward error correction code is applied to one or more frames transmitted downstream on the at least one channel and a number of errors corrected in the one or more frames is counted;
- configure at least one transmission scheme for the at least one channel, the transmission scheme dependent on the downstream transmission characteristics of the at least one channel;
- and
- transmit the one or more frames addressed to the at least one channel in accordance with the transmission scheme.
1 more element
Dependencies are inferred from the claim text.