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Proceedings Paper

Emulation-based comparative study of centralized and distributed control schemes for optical networks
Author(s): Chunsheng Xin; Yinghua Ye; Sudhir Dixit; Chunming Qiao
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Paper Abstract

Recently there are considerable amount of research about the automatic control and provisioning in all optical networks. One of the critical issues is how to provide effective lightpath provisioning to improve network performance, such as blocking probability and decision time. Depending on the network topology, configuration, and administration policy, a distributed or centralized control scheme can be employed to manage the routing and signaling. In a distributed control scheme, each node exchanges information with other nodes, but performs routing and signaling independently from other nodes. On the other hand, in a centralized scheme, each node communicates with a central controller and the controller performs routing and signaling on behalf of all other nodes. Intuitively, the centralized scheme can obtain a lower blocking probability since the controller has the complete resource availability information. We have studied the two schemes through emulations, determined the signaling and processing overheads and quantified the conditions that favor one approach over the other.

Paper Details

Date Published: 26 July 2001
PDF: 8 pages
Proc. SPIE 4527, Technologies, Protocols, and Services for Next-Generation Internet, (26 July 2001); doi: 10.1117/12.434441
Show Author Affiliations
Chunsheng Xin, Nokia Research Ctr. and SUNY/Buffalo (United States)
Yinghua Ye, Nokia Research Ctr. (United States)
Sudhir Dixit, Nokia Research Ctr. (United States)
Chunming Qiao, SUNY/Buffalo (United States)


Published in SPIE Proceedings Vol. 4527:
Technologies, Protocols, and Services for Next-Generation Internet
Anura P. Jayasumana; V. Chandrasekar, Editor(s)

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