Optical ring protection having matched nodes and alternate secondary path
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United States of America Patent
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Jun 4, 2002
Grant Date -
N/A
app pub date -
Jun 24, 1999
filing date -
Jun 24, 1999
priority date (Note) -
Expired
status (Latency Note)
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Abstract
The matched nodes provide protection for a failure in the connection between two bidirectional line switched rings. They use a secondary path in case of a primary path failure. The secondary path is set aside in either the working or protection bandwidth of the rings, thus wasting resources. The invention uses a dedicated secondary path between the primary and secondary nodes. With the invention, no ring protection mechanisms are compromised and the ring bandwidth is not wasted. Middle nodes also realize full add/drop capabilities.
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