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In this paper, we propose a new topological index, which is a numerical descriptor that characterizes survivable network topologies. A monotonically decreasing power law relationship can be found between this index and the total capacity allocation in the network. The new topological index is calculated based on the algebraic connectivity, which is adopted from spectral graph theory, more specifically...
Fast recovery from failures and efficient allocation of link capacities in a network for guaranteeing seamless communication services are two primary goals of network survivability design. Shared backup path protection (SBPP) technique has been shown to be a promising solution to tackle these problems, due to sharing capacity among protection paths. The level of capacity sharing that can be achieved...
In network survivability design, it is important to be able to differentiate network topologies by means of a quantitative measure that would indicate different levels of robustness 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 critical than others, for example, if their failures can disconnect...
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...
In this treatise, we investigated the application of singular value decomposion (SVD) assisted multiuser transmission in a multicell scenario. The SVD based scheme is capable of completely removing the cochannel interference, similarly to the classic zero forcing (ZF) based and block diagonalization (BD) aided schemes. Two different power allocation schemes are investigated for both SVD, ZF and BD...
Fast recovery from failures and overall high utilization of network capacity are two primary goals of network survivability design. Shared backup path protection has been shown to be efficient in terms of capacity utilization, due to the sharing capability among protection paths. However, the resulting integer linear programming (ILP) formulation of the problem is known to be NP-hard. This paper tackles...
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