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Survivability becomes an important issue in optical networks due to the huge bandwidth offered by optical technology. Many works have studied network survivability. The majority of these works are typically destined to single-domain. In this work we address the survivability in multidomain optical networks. This paper provides a classification of the existing protection solutions proposed for multi-domain...
In IP-over-WDM networks the logical topology consists of a set of lightpaths that are routed on top of the physical fiber topology. Hence a single fiber cut can lead to multiple logical link failures. We study the impact of lightpath routing on network survivability and spare capacity requirements. We show that poor routings can lead to significant increase in spare capacity requirements and develop...
In studies of survivable networks, it is important to be able to differentiate network topologies by means of a robust numerical measure that indicates the levels of immunity of these topologies to failures of their nodes and links. Ideally, such a measure should be sensitive to the existence of nodes or links which are more important than others, for example, if their failures cause the network's...
In this paper, instead of using the average nodal degree metric, we suggest to use the Fiedler value metric, adopted from the spectral graph theory, namely the 2nd smallest eigenvalue of the Laplacian matrix of a given network topology, to quantify network connectivity in studies of spare capacity allocation problem. Ideally, such a robustness measure should be sensitive to the existence of nodes...
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