By János Tapolcai, Pin-Han Ho, Péter Babarczi, Lajos Rónyai (auth.)
This publication covers the problems of tracking, failure localization, and recovery within the net optical spine, and makes a speciality of the growth of state of the art in either normal and educational examine. The authors summarize, categorize, and study the built know-how within the context of web fault administration and failure restoration below the Generalized Multi-Protocol Label Switching (GMPLS), through either elements of community operations and theories.
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Extra resources for Internet Optical Infrastructure: Issues on Monitoring and Failure Restoration
Sample text
Grover WD, Stamatelakis D (1998) Cycle-oriented distributed preconfiguration: ring-like speed with mesh-like capacity for self-planning network restoration. In: Proceedings of the international conference on communications (ICC), vol 1. IEEE, Atlanta, Georgia, USA, pp 537–543 16. Grover W, Doucette J, Clouqueur M, Leung D, Stamatelakis D (2002) New options and insights for survivable transport networks. IEEE Commun Mag 40(1):34–41 17. Herzberg M, Bye SJ (1994) An optimal spare-capacity assignment model for survivable networks with hop limits.
We note that several realization strategies exist for each protection method; however, we only give some insight to the design issues in each family, while providing references to the interested reader. 1 Pre-configured Protection (p-Cycles) Pre-configured protection falls in the category of shared protection because each piece of reserved spare capacity can be used by multiple W-LPs that will not be commonly affected by a considered single failure event. Different from all other shared protection schemes where spare capacity is reserved but not configured, a pre-configured protection scheme has spare capacity allocated in a specific shape and pre-configured so as to achieve ultra-fast and electronic signaling-free failure restoration.
To implement dedicated protection in mesh optical networks for a single connection request, the physical routes for the W-LP and P-LP must be determined and configured before connection setup. 18 2 Failure Restoration Approaches From a resource efficiency point of view 1:1 provides a better compromise than 1C1 protection. Although in both scenarios the protection paths are calculated in the same way as discussed in the next paragraphs, the operation of the two protection approaches differs. In 1:1 the spare capacity along the protection path can be used to send low priority traffic in the operational state of the network.