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Communication network, wavelength division multiplex transmission equipment, optical switch equipment, and optical attribute/state administering method for them

  • US 20020097954A1
  • Filed: 01/24/2002
  • Published: 07/25/2002
  • Est. Priority Date: 01/24/2001
  • Status: Active Grant
First Claim
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1. A communication network having a plurality of optical communication devices connected with each other, comprising:

  • uni-directional in-band control channels provided in every optical links leading from the output interfaces of one of adjoining first and second optical communication devices to the input interfaces of the other of the first and second optical communication devices, between the interfaces of the first and second optical communication devices along and for the every optical links; and

    an out-band control channel provided between the first and second optical communication devices, wherein the first and second optical communication devices include;

    control channel terminators for terminating the uni-directional in-band control channels and the out-band control channel; and

    optical link controllers for administering the every optical links by exchanging control messages through the control channel terminators.

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