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COLORLESS, DIRECTIONLESS AND CONTENTIONLESS NETWORK NODE

  • US 20160149664A1
  • Filed: 11/27/2015
  • Published: 05/26/2016
  • Est. Priority Date: 11/26/2014
  • Status: Active Grant
First Claim
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1. A network node, comprising:

  • a plurality of network degree interfaces that each direct WDM optical signals onto, and receive WDM optical signals from, a different optical transmission path of a optical transmission network, each of the network degree interfaces being optically coupled to one another so that any one or more wavelength components of a WDM optical signal received on any one of the network degree interfaces is directable to any other of the network degree interfaces;

    an add/drop interface that includes a drop wavelength selective switch (WSS) and an add WSS, the drop WSS having a plurality of inputs each being optically coupled to receive wavelength components from a different one of the network degree interfaces and a plurality of outputs, the add WSS having a plurality of outputs each being optically coupled to direct wavelength components to a different one of the network degree interfaces and a plurality of inputs, wherein the add and drop WSSs are each configured to selectively direct any subset of the wavelength components received at any of its inputs to a different one of its optical outputs, provided that the wavelength components of optical beams received by any two of the inputs cannot be simultaneously directed to a common one of the outputs; and

    a plurality of transponder ports each being optically coupled to a different output of the drop WSS and a different input of the add WSS.

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