A kind of topology aggregation algorithm in hierarchical wavelength-routed optical networks

A kind of topology aggregation algorithm in hierarchical wavelength-routed optical networks In large-scale networks composed of several hierarchical subnetworks, topology aggregation (TA) is implemented for both scalability and security consideration. However, due to the special characteristic of optical wavelength-routed networks, existing TA algorithms cannot be applied directly for topology compression. In this paper, we propose a kind of TA algorithm suitable for hierarchical wavelength-routed optical networks, thereby considering information of residual wavelengths on network links. Basically, our TA algorithm is based on a transition matrix technique for constructing a full mesh topology and asymmetric star approach for a more compact topology. Simulations with randomly-generated networks show that topology information compression can be achieved with a little loss of its accuracy: the ratio of border node pairs with representation deviation being well below 10%. Results also indicate that the advantage of our algorithm is also behaved on reducing the amount of link-state-advertisement (LSA) messages and making networks less vulnerable to propagation delay of these messages over communication links. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Photonic Network Communications Springer Journals

A kind of topology aggregation algorithm in hierarchical wavelength-routed optical networks

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Publisher
Kluwer Academic Publishers-Plenum Publishers
Copyright
Copyright © 2006 by Springer Science+Business Media, LLC
Subject
Computer Science; Computer Communication Networks; Electrical Engineering; Characterization and Evaluation of Materials
ISSN
1387-974X
eISSN
1572-8188
D.O.I.
10.1007/s11107-006-0002-9
Publisher site
See Article on Publisher Site

Abstract

In large-scale networks composed of several hierarchical subnetworks, topology aggregation (TA) is implemented for both scalability and security consideration. However, due to the special characteristic of optical wavelength-routed networks, existing TA algorithms cannot be applied directly for topology compression. In this paper, we propose a kind of TA algorithm suitable for hierarchical wavelength-routed optical networks, thereby considering information of residual wavelengths on network links. Basically, our TA algorithm is based on a transition matrix technique for constructing a full mesh topology and asymmetric star approach for a more compact topology. Simulations with randomly-generated networks show that topology information compression can be achieved with a little loss of its accuracy: the ratio of border node pairs with representation deviation being well below 10%. Results also indicate that the advantage of our algorithm is also behaved on reducing the amount of link-state-advertisement (LSA) messages and making networks less vulnerable to propagation delay of these messages over communication links.

Journal

Photonic Network CommunicationsSpringer Journals

Published: Jan 11, 2007

References

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