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The multicast paradigm offers tremendous benefits in efficiency for transmitting data across optical networks, allowing a single client to send information to an entire set of endpoints. A multicast request is most efficiently provisioned through the creation of a tree, with the end points, or resources, occasionally serving as branching points. This practice can lead to the source of the request...
Improving resilience against failures and targeted attacks is an important aspect of network design. The resilience and cost of networks are two opposing objectives in which a designer should consider when building networks. We develop a heuristic algorithm that balances the centrality of networks by adding a set of links that minimizes the variance of graph centrality measures in a least costly fashion...
Path Diversification is a new mechanism that can be used to select multiple paths between a given ingress and egress node pair using a quantified diversity measure to achieve maximum flow reliability. The path diversification mechanism is targeted at the end-to-end layer, but can be applied at any level for which a path discovery service is available. Path diversification also takes into account...
The path geo-diversification mechanism introduced in this paper takes geographical diversity of physical network topology into consideration when making routing decisions. It enables the network to be more resilient against area-based challenges by exploiting nodes' multiple ingress and egress ports. It shows better performance compared to OSPF when the network is subject to area-based challenges...
In this paper, we propose a flexible and extensible framework for network survivability based on interdependency modeling of Smart Grid and Supervisory Control and Data Acquisition (SCADA) network. We developed novel approach for vulnerability reduction considering both structural and functional vulnerability. We computed interdependent effect between these networks under different conditions. We...
As the Internet becomes increasingly important to all aspects of society, the consequences of disruption become increasingly severe. Thus it is critical to increase the resilience and survivability of the future network. We define resilience as the ability of the network to provide desired service even when challenged by attacks, large-scale disasters, and other failures. This paper describes a comprehensive...
In this paper we extend our path diversity metric to create a composite compensated total graph diversity metric that is representative of a particular topology's survivability with respect to distributed simultaneous link and node failures. We tune the accuracy of this metric using 17 topologies, including 3 real fiber maps, 10 inferred logical maps, and 2 synthetic topologies having simulated their...
Core networks are increasingly supporting overlay networks on top of an IP-WDM network. As network reliability is a growing concern, a major challenge in the survivable layered network design is the crosslayer survivable mapping problem that deals with QoS parameters such as availability, lightpath length, and many others. This work directly studies this problem and proposes matrix formulations of...
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