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Adaptive flexible grid in an optical network

  • US 10,256,935 B1
  • Filed: 02/27/2018
  • Issued: 04/09/2019
  • Est. Priority Date: 02/27/2018
  • Status: Active Grant
First Claim
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1. A method for configuring a flexible grid in an optical network, comprising:

  • determining a first number of channels in the flexible grid to allocate to traffic between a transmitter in the optical network and a receiver in the optical network using a first modulation format selected for the traffic and including zero forward error correction (FEC) overhead bytes in packets transmitted between the transmitter and the receiver;

    configuring the transmitter to allocate the first number of channels in the flexible grid to the traffic between the transmitter and the receiver and to transmit packets to the receiver using the first modulation format and zero FEC overhead bytes;

    determining a second number of channels in the flexible grid to allocate to the traffic between the transmitter and the receiver, the second number of channels being less than the first number of channels, the determining including;

    selecting a second modulation format for the traffic, the second modulation format being of a higher order than the first modulation format;

    selecting a first non-zero number of FEC overhead bytes to be included in packets transmitted between the transmitter and the receiver; and

    determining a minimum number of channels for which transmission of packets between the transmitter and receiver using the second modulation format and the first non-zero number of FEC overhead bytes meets a predetermined performance measure; and

    re-configuring the transmitter to allocate the second number of channels in the flexible grid to the traffic between the transmitter and the receiver and to transmit packets to the receiver using the second modulation format and including the first non-zero number of FEC overhead bytes.

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