Method for restoring a virtual path in an optical network using 1:N protection
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United States of America Patent
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Jan 13, 2009
Grant Date -
Feb 17, 2005
app pub date -
Jun 7, 2001
filing date -
May 16, 2001
priority date (Note) -
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Abstract
A method for restoring a virtual path, provisioned between a source and a target node, in a zoned mesh optical network is described. The method, in one embodiment, allocates a primary and a secondary physical path to the virtual path. The two physical paths are node and link disjoint. In case of a failure on one physical path, the network switches the virtual path to the other physical path. The alternate path can be shared among various virtual paths during the restoration.
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