A novel survivable IP over WDM network design problem is proposed. The IP network uses lightpath services of the WDM network to implement its IP links. The WDM network can provide unprotected and protected lightpaths, as well as a new lightpath service referred to as survivable pair. The IP network must support two traffic matrices, one under normal conditions and the other whenever there is a ...

A survivable path (W,P ) between a pair of vertices xi, xj in undirected simple graph G is an ordered pair of edge-disjoint simple paths consisting of a working path W = xi...xj and a protection path P = xi...xj . An optimal set of survivable paths in graph G corresponds to a set of mesh-restored lightpaths defined on an optical network that minimizes the number of used optical channels. In thi...

vii 1 Network System Survivability 1 1.1 Survivability Concepts 1 1.2 The Survivable Network Analysis Method 2 2 Sentinel: The Case Study Subsystem 5 3 Applying the Survivable Network Analysis Method to Sentinel 7 3.1 Method Application 7 Step 1: System Definition 8 Step 2: Essential Capability Definition 10 Step 3: Compromisable Capability Definition 10 Step 4: Survivability Analysis 12 4 Less...

In this paper, we describe the design, development, and validation of an information system that has recently set a new high-water mark for intrusion tolerance. The system, known as the DPASA Survivable JBI, conforms to an abstract architecture for survivable systems and integrates concrete defense mechanisms for preventing intrusion and for detecting and responding to intrusions that cannot be...

.............................................................................................................vii 1 Background ..................................................................................................1 1.1 Definition of Requirements Engineering.................................................1 1.2 Typical Requirements Engineering Activities..................................

Failure restoration at the IP layer in IP-over-WDM networks requires to map the IP topology on the WDM topology in such a way that a failure at the WDM layer leaves the IP topology connected. Such a mapping is called survivable. As finding a survivable mapping is known to be NP-complete, in practice it requires a heuristic approach. We have introduced in [1] a novel algorithm called “SMART”, th...

We consider the design of reconfiguring logical topologies over physical WDM ring networks. The logical topology consists of the same set of nodes as the physical topology, and the links of the logical topology are lightpaths established (or embedded) over the physical topology. The logical topology is said survivable if the failure of any single physical link does not disconnect the logical to...

Generalized Survivable Networks (GSNs) have two interesting properties that are essential attributes for the future backbone networks – full survivability against link failures and support for dynamic traffic demands. GSN incorporates the non-blocking network concept into the survivable network models. Given a set of nodes and a topology that is at least 2-edge connected, a certain minimum capa...