By János Tapolcai, Pin-Han Ho, Péter Babarczi, Lajos Rónyai (auth.)
This booklet covers the problems of tracking, failure localization, and recovery within the net optical spine, and specializes in the growth of cutting-edge in either regular and educational learn. The authors summarize, categorize, and examine the constructed expertise within the context of net fault administration and failure restoration less than the Generalized Multi-Protocol Label Switching (GMPLS), through either points of community operations and theories.
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Extra info for Internet Optical Infrastructure: Issues on Monitoring and Failure Restoration
V6 v6 ! v3 ! v4 ! v7 Link Protection route v2 ! v1 No W-LP to protect v3 ! v1 v5 ! v2 No W-LP to protect v4 ! v3 ! v1 v4 ! v3 ! v2 ! v1 v5 ! v6 ! v3 ! v2 v3 ! v2 No W-LP to protect v4 ! v3 No W-LP to protect v6 ! v3 No W-LP to protect v7 ! v4 v6 ! v5 v7 ! v6 v7 ! v6 ! v3 ! v4 v6 ! v3 ! v2 ! v5 No W-LP to protect v4 ! v1 26 2 Failure Restoration Approaches to detect and restore the failure at the same time. Thus, there is no need for real-time signaling in the fault management phase. On the other hand, extensive signaling is required to set up the corresponding protection paths in the network.
V2 ! v1 v5 ! v6 ! v3 ! v2 v3 ! v2 No W-LP to protect v4 ! v3 No W-LP to protect v6 ! v3 No W-LP to protect v7 ! v4 v6 ! v5 v7 ! v6 v7 ! v6 ! v3 ! v4 v6 ! v3 ! v2 ! v5 No W-LP to protect v4 ! v1 26 2 Failure Restoration Approaches to detect and restore the failure at the same time. Thus, there is no need for real-time signaling in the fault management phase. On the other hand, extensive signaling is required to set up the corresponding protection paths in the network. 5 Failure Dependent Protection Finally, we discuss FDP, as the other extreme of pre-configured protection in the design spectrum of protection approaches.
Work on SSP is briefly surveyed as follows. The approach developed in  is characterized by separating the tasks of routing and spare capacity allocation into two subsequent processes, in which the spare capacity sharing for each link is not considered until the physical routes of the backup segments are defined. In  and , two similar dynamic algorithms are proposed to implement shared link protection (SLP), in which each link is switched to the backup path from its immediate upstream node and merge back to the original path at its immediate downstream node and at any of the downstream nodes, respectively.