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Optical path accommodation design considering failure restoration with minimum cross-connect system scale

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3 Author(s)
Nagatsu, Naohide ; NTT Optical Network Syst. Labs., Kanagawa, Japan ; Okamoto, S. ; Sato, K.

This paper proposes optical path accommodation design algorithms for both the wavelength path (WP) and virtual wavelength path (VWP) schemes with or without failure restoration. The optical path (OP) employs WDM/FDM (wavelength/frequency division multiplexing) and wavelength routing in the path layer of the transport network. The proposed algorithms adopt some heuristic approaches to the algorithmic complexity caused by the NP-completeness of the wavelength assignment problem. The objective function is taken as minimizing the average total number optical path cross-connect (OPXC) ports, in other words, OPXC system scale. Utilizing the developed algorithms, extensive simulations quantitatively evaluate the OPXC system scale requirements of a large scale network whose physical topology and path demand distribution pattern are arbitrary. The simulations reveal the basic difference between the WP and VWP schemes

Published in:

Network Operations and Management Symposium, 1996., IEEE

Date of Conference:

15-19 Apr 1996

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