Abstract
The distributed m-trail framework (i.e., NL-UFL) introduced in the previous chapter enables every node to be able to instantly localize a failed SRLG such that the failure restoration can be performed automatically in the optical domain. This is obviously not necessary since a node may not need to respond to a failure event if the node is not traversed by any P-LP whose W-LP is subject to the failure. In response to such an observation, this chapter defines and investigates an interesting m-trail scenario, called Global Neighborhood Failure Localization (G-NFL). As a one step advance of NL-UFL, G-NFL defines the neighborhood of a node, which is a set of links whose failure states should be known to the node in restoration of the corresponding W-LPs, and the G-NFL problem routes a set of m-trails such that each node can localize any failure in its neighborhood. To gain insight into the G-NFL problem, the chapter provides bound analysis on the minimum bandwidth required for m-trails, along with a simple yet effective heuristics.
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Tapolcai, J., Ho, PH., Babarczi, P., Rónyai, L. (2015). Global Neighborhood Failure Localization. In: Internet Optical Infrastructure. Springer, New York, NY. https://doi.org/10.1007/978-1-4614-7738-9_6
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DOI: https://doi.org/10.1007/978-1-4614-7738-9_6
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