Method for computing a backup path for protecting a working path in a data transport network
First Claim
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1. ) A method for computing a backup path for protecting a first working path in a data transport network that includes a plurality of working paths, the method comprising:
- a) determining a backup path through the data transport network by selecting segments of the backup path from a set of available segments in the data transport network, where at least one of the selected segments is a shared segment part of a backup path protecting a second working path other than the first working path;
b) the selecting of the shared segment including determining if the first and second working paths have a common potential point of failure.
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Abstract
A method for computing a backup path for protecting a first working path in a data transport network that includes a plurality of working paths. The method includes determining a route of the backup path by selecting individual backup path segments from a set of possible segments in the data transport network. In the case of a segment that is shared between the first working path and one or more other working paths, the selection process takes into account the existence of a potential point of failure common to the working paths sharing the segment.
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Citations
21 Claims
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1. ) A method for computing a backup path for protecting a first working path in a data transport network that includes a plurality of working paths, the method comprising:
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a) determining a backup path through the data transport network by selecting segments of the backup path from a set of available segments in the data transport network, where at least one of the selected segments is a shared segment part of a backup path protecting a second working path other than the first working path;
b) the selecting of the shared segment including determining if the first and second working paths have a common potential point of failure. - View Dependent Claims (2, 3, 4, 5, 6)
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7. ) A method for computing a backup path for protecting a first working path in a data transport network that includes a plurality of working paths, the method comprising:
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a) computing a tentative backup path through the data transport network the tentative backup path including a plurality of segments;
b) ascertaining for one or more segments if the segment is shared by working paths having a common potential point of failure. - View Dependent Claims (8, 9, 10, 11)
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12. ) A computer readable storage medium containing a program element for execution by a computer to implement a method for computing a backup path for protecting a first working path in a data transport network that includes a plurality of working paths, the method comprising:
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a) determining a backup path through the data transport network by selecting segments of the backup path from a set of available segments in the data transport network, where at least one of the selected segments is a shared segment part of a backup path protecting a second working path other than the first working path;
b) the selecting of the shared segment including determining if the first and second working paths have a common potential point of failure. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification