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Journal of Optical Communications and Networking

Journal of Optical Communications and Networking

  • Editors: K. Bergman and O. Gerstel
  • Vol. 4, Iss. 5 — May. 1, 2012
  • pp: 356–365

Impairment-Aware Design of Translucent DWDM Networks Based on the k-Path Connectivity Graph

Giuseppe Rizzelli, Massimo Tornatore, Guido Maier, and Achille Pattavina  »View Author Affiliations


Journal of Optical Communications and Networking, Vol. 4, Issue 5, pp. 356-365 (2012)
http://dx.doi.org/10.1364/JOCN.4.000356


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Abstract

In this paper we propose a design procedure based on comprehensive integer linear programing (ILP) for translucent optical transport networks (OTNs), exploiting an extended version of the so-called “connectivity graph.” For the first time to the best of our knowledge, we propose a mathematical approach that covers the manifold challenges of a realistic optical layer OTN design, jointly solving the regenerator placement problem (RPP) and the routing, fiber and wavelength assignment with regenerator problem (RFWA-RP). As a first contribution, we extend the concept of the connectivity graph to a k-path (kp) connectivity graph. Second, the formulation addresses the problem of planning the number of dense wavelength division multiplexing systems, jointly solving the RPP and placing transponders. Third, we consider regeneration devices as wavelength converters also, showing the benefits arising from that aspect disregarded in the existing impairment-aware (IA) ILP formulations based on the connectivity graph. Finally we compare over different networks the results of our design procedure with those achieved by a hybrid method that combines a simplified IA-ILP formulation with a greedy heuristic. Moreover, an analytical framework to evaluate the network cost in terms of capital expenditure and operational expenditure is also presented. We show that the kp connectivity graph represents a cost-effective tool for network design, as it allows one to greatly reduce the number of resources needed in both the protected and the unprotected scenarios.

© 2012 OSA

OCIS Codes
(060.4254) Fiber optics and optical communications : Networks, combinatorial network design
(060.4256) Fiber optics and optical communications : Networks, network optimization

ToC Category:
Research Papers

History
Original Manuscript: August 3, 2011
Revised Manuscript: March 19, 2012
Manuscript Accepted: March 22, 2012
Published: April 16, 2012

Citation
Giuseppe Rizzelli, Massimo Tornatore, Guido Maier, and Achille Pattavina, "Impairment-Aware Design of Translucent DWDM Networks Based on the k-Path Connectivity Graph," J. Opt. Commun. Netw. 4, 356-365 (2012)
http://www.opticsinfobase.org/jocn/abstract.cfm?URI=jocn-4-5-356


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