Nested protection switching in a mesh connected communications network
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United States of America Patent
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N/A
Issued Date -
Nov 4, 2004
app pub date -
Feb 12, 2003
filing date -
Feb 12, 2003
priority date (Note) -
Abandoned
status (Latency Note)
Importance
Abstract
In a mesh connected communications network, nested link protection for a working link between two nodes across the network is provided. In the event of a fault on the working link between the two nodes, traffic on the link may be switched to a single parallel link between the two nodes, thereby restoring traffic on the link. Additionally, a link protection path extending between the two nodes is provisioned by way of at least one intermediate node. In the event the parallel protection link is not available, traffic carried on the working link may be switched to the link protection path, restoring traffic to the second node by way of the intermediate node. Conveniently, link protection path switching may be used in the event the parallel protection link is not available or at the choice of an operator.
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