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Comparing Trade-off Based Models of the Internet

Spathari A., Foudalis I., Sideri M., Papadimitriou C.

Fundamenta Informaticae

2009

Vol. 92, nr 4

363-372

We introduce and evaluate several new models of network growth. Our models are extensions of the FKP model, modifying and improving it in various dimensions. In all these models nodes arrive one by one, and each node is connected to previous nodes by optimizing a trade-off between a geometric objective ("last mile cost") and a topological objective ("position in the network"). Our new models differ from the original FKP model in directions inspired by the real Internet: two or more edges are attached to each arriving node (while the FKP model produces a tree); these edges are chosen according to various criteria such as robustness; edges may be added to the network between old nodes; or only certain "fertile" nodes (an attribute that changes dynamically) are capable of attracting new edges. We evaluate these models, and compare them with the graph of the Internet's autonomous systems, with respect to a suite of many test parameters (such as average degree, power law exponent, and local clustering rank) proposed in the literature; to this end we have developed the network generation and measurement system Pandora.

Efficiency analysis of multicast routing algorithms in large networks

Piechowiak M., Zwierzykowski P.

Poznan University of Technology Academic Journals. Electrical Engineering

2007

No 54

173-180

The paper presents the research results of multicast heuristic algorithms. The paper is an extension of previous publications presented in [1.2] that discussed small network structures reflecting the real Internet topology. The paper approaches basic methods of generating the Internet topology - Waxman method and Barabasi-Albert method. Performance study of multicast trees constructed by the algorithms is carried out and analysed.