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Benefits of multicasting in all-optical networks

Benefits of multicasting in all-optical networks All-optical WDM networks are fast becoming the natural choice for future backbone. In this paper, we establish the efficiency of multicasting over unicasting in all-optical WDM networks, assess the usefulness of wavelength conversion for multicasting, and explore the issues related to the splitting (or copying) capability of the nodes. The comparison between multicasting and unicasting is based on the number of wavelengths as well as the amount of bandwidth required for a given set of multicasting sessions. For each multicasting session, a source-specific multicasting forest (or trees) is constructed first, taking into account the sparse splitting capability of the nodes in the network. Then, each multicasting tree is partitioned into segments according to the sparse wavelength conversion capability of the nodes on the tree such that each segment needs to be assigned the same wavelength. Simulation results obtained for a practical network such as NSFNET and randomly generated networks show that multicasting can reduce both the bandwidth consumed and the number of wavelengths required by as much as 50% or more when the size (i.e. the number of destinations) of each multicasting session is reasonably large. Such a reduction due to multicasting is not affected much by the wavelength conversion capability, the number of multicasting sessions and the size of the networks whose topology is more or less random. The results have also shown that sparse splitting can be nearly as effective as full splitting for multicasting. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Proceedings of SPIE SPIE

Benefits of multicasting in all-optical networks

Malli, Rajkumar
Proceedings of SPIE , Volume 3531 (1) – Oct 7, 1998
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References (28)

Publisher
SPIE
Copyright
Copyright © 2003 COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
ISSN
0277-786X
eISSN
1996-756X
DOI
10.1117/12.327060
Publisher site
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Abstract

All-optical WDM networks are fast becoming the natural choice for future backbone. In this paper, we establish the efficiency of multicasting over unicasting in all-optical WDM networks, assess the usefulness of wavelength conversion for multicasting, and explore the issues related to the splitting (or copying) capability of the nodes. The comparison between multicasting and unicasting is based on the number of wavelengths as well as the amount of bandwidth required for a given set of multicasting sessions. For each multicasting session, a source-specific multicasting forest (or trees) is constructed first, taking into account the sparse splitting capability of the nodes in the network. Then, each multicasting tree is partitioned into segments according to the sparse wavelength conversion capability of the nodes on the tree such that each segment needs to be assigned the same wavelength. Simulation results obtained for a practical network such as NSFNET and randomly generated networks show that multicasting can reduce both the bandwidth consumed and the number of wavelengths required by as much as 50% or more when the size (i.e. the number of destinations) of each multicasting session is reasonably large. Such a reduction due to multicasting is not affected much by the wavelength conversion capability, the number of multicasting sessions and the size of the networks whose topology is more or less random. The results have also shown that sparse splitting can be nearly as effective as full splitting for multicasting.

Journal

Proceedings of SPIE – SPIE

Published: Oct 7, 1998

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