Abstract

The resource requirements for two optical-core network architectures are compared. One architecture is a highly optimized, multihop mesh of optical switches, in which the number of optical nodes traversed by a light path is bounded. The other is a single-hop composite-star structure. We show in a case study that although the composite star may require a higher fiber-distance value than the optimized mesh structure, it needs many fewer ports and a smaller optical switching fabric to achieve the same throughput. The single-hop network does not require any wavelngth conversion, it eliminates the need for traffic engineering, and is resilient to changes in the spatial distribution of traffic. Results are quantified through simulation.

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References

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  9. Comments by anonymous Journal of Optical Networking reviewer.
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IEEE Commun. Mag. (2)

P. Green, "Progress in optical networking," IEEE Commun. Mag. 39, 54-61 (2001).

J. M. H. Elmirghani and H. T. Mouftah, "Technologies and architectures for scalable dynamic dense WDM networks," IEEE Commun. Mag. 38, 58-66 (2000).

IEEE Internet Comput. (1)

R. Callon, "Predictions for the core of the network," IEEE Internet Comput. 4, 60-61 (2000), <a href="http://computer.org/internet/">http://computer.org/internet/</a>.

IEEE/ACM Trans. Netw. (1)

R. Ramaswami and K. N. Sivarajan, "Routing and wavelength assignment in all-optical networks," IEEE/ACM Trans. Netw. 3, 489-500 (1995).

J. Lightwave Technol. (1)

Other (5)

R. Vickers and M. Beshai, "PetaWeb Architecture," presented at Networks 2000—Toward Natural Networks: 9th International Telecommunication Network Planning Symposium, Toronto, Canada, 10-15 Sept. 2000.

F. Blouin, S. Yazid, and B. Bou-Diab, "Emulation of a vast adaptive network," presented at Networks 2000—Toward Natural Networks: 9th International Telecommunication Network Planning Symposium, Toronto, Canada, 10-15 Sept. 2000.

M. Beshai, F. Blouin, and R. Krishnan, "PetaWeb—building block for a yottabit-per-second network," report to DARPA Next Generation Internet, Technology Investment Agreement TIA F30602-98-2-0194 (2001).

Comments by anonymous Journal of Optical Networking reviewer.

J. S. Turner, "WDM burst switching for petabit data networks," in Optical Fiber Communication Conference (Institute for Electrical and Electronics Engineers, New York, 2000), Vol. 2, pp. 47-49.

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