Distributed signaling scheme with switching fabric status information in wavelength-routed optical networks

Lihua Lu; Qingji Zeng; Jimin Liu; Yanna Hao

doi:10.1117/12.635715

5 December 2005 Distributed signaling scheme with switching fabric status information in wavelength-routed optical networks

Lihua Lu, Qingji Zeng, Jimin Liu, Yanna Hao

Author Affiliations +

Proceedings Volume 6022, Network Architectures, Management, and Applications III; 602207 (2005) https://doi.org/10.1117/12.635715
Event: Asia-Pacific Optical Communications, 2005, Shanghai, China

Abstract

In this paper, a new scheme to mitigate the connection setup time overheads in distributed control schemes for wavelength-routed optical networks is proposed. In this scheme, we consider the reconfiguration delay of switch fabrics in the distributed signaling protocols, which designated as the signaling with switch fabric status (SWFS). Based on the reconfiguration information being carried by signaling messages along with wavelength availability information, distributed wavelength assignment algorithm at the destination node will select a wavelength with the minimal switch reconfiguration delay along the lightpath to shorten average connection setup time. Simulation results indicate that the first-fit algorithm with switch status (S-FF) and random algorithm with switch status (S-RM) have the shorter setup time, lower switch ratio as well as better blocking performance than those of classic schemes. Especially, the proposed scheme significantly reduces the number of switch fabrics that need to be reconfigured. Moreover, we investigate the effect of number of add/drop ports of optical cross-connects (OXCs) on the blocking performance of the scheme. We find that when the number of add/drop ports of OXCs is larger than a base boundary, the network may achieve almost the best blocking performance of the distributed wavelength provisioning.

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Lihua Lu, Qingji Zeng, Jimin Liu, and Yanna Hao "Distributed signaling scheme with switching fabric status information in wavelength-routed optical networks", Proc. SPIE 6022, Network Architectures, Management, and Applications III, 602207 (5 December 2005); https://doi.org/10.1117/12.635715

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