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Published in:
2015 | OriginalPaper | Chapter
4. Distributed Failure Localization
Authors : János Tapolcai, Pin-Han Ho, Péter Babarczi, Lajos Rónyai
Published in: Internet Optical Infrastructure
Publisher: Springer New York
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Abstract
The chapter continues the topic of bm-trail allocation as in Chap. 3, by assuming a distributed control environment where a remote network controller for collecting the alarms is absent. Instead, the scenario that a node can individually perform UFL without relying on any failure notification mechanism is targeted. Accordingly, a constraint is imposed on the previously formulated bm-trail allocation problem where the alarms locally available to a node should form a complete alarm code table (ACT) for making the failure localization decision. This is also referred to as local unambiguous failure localization (L-UFL) at the node. A step further to L-UFL is that all the nodes are required to be L-UFL capable, which leads to the scenario referred to as Network wide L-UFL (NL-UFL). The chapter presents solutions to the bm-trail allocation problems for L-UFL and NL-UFL, respectively, via both bound analysis and heuristics under various network failure scenarios.