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Fault communication for network distributed restoration

  • US 20010038471A1
  • Filed: 01/05/2001
  • Published: 11/08/2001
  • Est. Priority Date: 03/03/2000
  • Status: Abandoned Application
First Claim
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1. At a node of a telecommunications network along a service path satisfying a demand from a start node to an end node, a method for detecting a failure in the service path, comprising the steps of:

  • (a) receiving, at the node, incoming payload signals from its previous node along the service path;

    (b) monitoring, at the node, the incoming payload signals for a loss-of-signal (LOS) condition to detect at the node the failure in the service path;

    (c) monitoring, at the node, the incoming payload signals for an in-band alarm indication signal to detect at the node the failure in the service path; and

    (c) monitoring, at the node, an out-of-band signaling channel for a failure message transmitted from its previous node along the service path to detect at the node the failure in the service path.

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