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Translucent network design from a CapEx/OpEx perspective

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Abstract

Translucent wdm network design has been widely investigated during the last 10 years. Translucent networks stand halfway between opaque and transparent networks improving the signal budget while reducing the network cost. On one hand, opaque networks provide satisfying quality from source to destination by the use of electrical reg regeneration (Re-amplifying, Re-shaping, and Re-timing) at each network node. In addition to their high cost inherent to numerous 3R regenerations, opaque networks are also constrained by the bit-rate dependence of electrical components. Transparent networks, on the other hand, do not include any electrical regeneration; therefore, the signal quality is degraded due to the accumulation of linear and non-linear effects along the signal’s route. Translucent networks include electrical regeneration at some network nodes. Among the different possible strategies for translucent network design, sparse regeneration inserts regenerators whenever needed to help establish connection requests. In this context the objective of translucent network design is to judiciously choose the regeneration sites in order to guarantee a certain quality of transmission while minimizing the network cost. In this paper, we propose to solve the translucent network design problem by introducing a heuristic for routing, wavelength assignment, and regenerator placement. This heuristic, called COR2P (Cross-Optimization for RWA and Regenerator Placement) aims not only to minimize the number of required regenerators, but also to minimize the number of regeneration sites. In this perspective, we introduce an original cost function that contributes to the optimization of CapEx/OpEx expenditures in translucent network design. In fact, the CapEx-to-OpEx ratio strongly depends on the pricing and management strategy of the carrier. In this respect, COR2P is designed in a way that its parameters can be adjusted according to carriers’ strategies. In order to discuss its different features, we compare COR2P performance with two other algorithms proposed in the literature for translucent network design.

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References

  1. Ramaswami R., Sivarajan K.N.: Optical Networks: A Practical Perspective. Morgan Kaufmann Publishers, Inc. San Francisco, California (2002)

    Google Scholar 

  2. Al Zahr, S., Gagnaire, M., Puech, N., Koubàa, M.: Physical layer impairments in WDM core networks: a comparison between a north-American backbone and a pan-European backbone. In: Proceedings of the IEEE Broadnets’05, pp. 335–340 (2005)

  3. Ramamurthy, B., Feng, H., Data, D., Heritage, J.P., Mukherjee, B.: Transparent vs. opaque vs. translucent wavelength-routed optical networks. In: Proceedings of the OFC ’99, pp. 59–61 March 1999

  4. Gagnaire M., Al Zahr S.: Impairment aware routing and wavelength assignment in translucent networks: state of the art. IEEE Commun. Mag. 47(5), 55–61 (2009)

    Article  Google Scholar 

  5. Yang X., Ramamurthy B.: Sparse regeneration in translucent wavelength-routed optical networks: architecture, network design and wavelength routing. Photonic Netw. Commun. 10(1), 39–50 (2005)

    Article  Google Scholar 

  6. Kim S.-W., Seo S.-W.: Regenerator placement algorithms for connection establishment in all-optical networks. SPIE Opt. Netw. Mag. 1(1), 47–60 (2000)

    MathSciNet  Google Scholar 

  7. Simmons, J.: Analysis of wavelength conversion in all-optical express backbone networks. OFC, TuG2 (2002)

  8. Ezzahdi, M.A., Al Zahr, S., Koubàa, M., Puech, N., Gagnaire, M.: LERP: a quality of transmission dependent heuristic for routing and wavelength assignment in hybrid WDM networks. In: Proceedings of the IEEE ICCCN’06, pp. 125–130 (2006)

  9. Pachnicke, S., Paschenda, T., Krummrich, P.: Assessment of a constraint-based routing algorithm for translucent 10 Gbits/s DWDM networks considering fiber nonlinearities. pp. 365–377 (2008)

  10. Pachnicke, S., Paschenda, T., Krummrich, P.: Physical impairment based regenerator placement and routing in translucent optical networks. IEEE OFC/NFOEC’08, pp. 1–3 (2008)

  11. Youssef, M., Al Zahr, S., Gagnaire, M.: Traffic-driven vs. topology-driven strategies for regeneration sites placement. ICC (2010)

  12. Mukherjee B.: Optical WDM Networks. Springer, New York (2006)

    Google Scholar 

  13. Morea A., Brogard N., Leplingard F., Antona J.C., Zami T., Lavigne B., Bayart D.: QoT function and A* routing an optimized combination for connection search in translucent networks. J. Opt. Netw. 7, 42–61 (2008)

    Article  Google Scholar 

  14. Deng, T., Subramaniam, S., Xu, J.: Crosstalk-aware wavelength assignment in dynamic wavelength-routed optical networks. In: Proceedings of the IEEE Broadnets’04, pp. 140–149 (2004)

  15. Cardillo, R., Curri, V., Mellia, M.: Considering transmission impairments in wavelength routed networks. In: Proceedings of the ONDM’05, pp. 421–429 (2005)

  16. Huang Y., Heritage J.P., Mukherjee B.: Connection provisioning with transmission impairment consideration in optical WDM networks with high-speed channels. IEEE/OSA J. Lightwave Technol. 23(3), 982–993 (2005)

    Article  Google Scholar 

  17. Ramamurthy, B., Yaragorla, S., Yang, X.: Translucent optical WDM networks for the next-generation backbone networks. In: Proceedings of the IEEE GLOBECOM’01, vol. 1, pp. 60–64 (2001)

  18. Al Zahr, S., Puech, N., Gagnaire, M.: Gain equalization versus electrical regeneration tradeoffs in hybrid WDM networks. In: Proceedings of the IEEE ConTEL’07, pp. 37c–44c (2007)

  19. Al Zahr, S., Gagnaire, M., Puech, N.: Impact of wavelength assignment strategies on hybrid WDM network planning. In: Proceedings of the DRCN’07, pp. 1–7 (2007)

  20. Youssef, M., Al Zahr, S., Gagnaire, M.: Cross-optimization for RWA and regenerator placement in translucent WDM networks. ONDM (2010)

  21. Chen, S., Raghavan, S.: Regenerator location problem. INFORMS Telecommunication Conference (2006)

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Authors and Affiliations

  1. LTCI CNRS Networks and Computer Science Department, Institut TELECOM—TELECOM ParisTech, Paris, France

    Mayssa Youssef, Sawsan Al Zahr & Maurice Gagnaire

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  1. Mayssa Youssef
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  2. Sawsan Al Zahr
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  3. Maurice Gagnaire
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Correspondence to Mayssa Youssef.

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Youssef, M., Al Zahr, S. & Gagnaire, M. Translucent network design from a CapEx/OpEx perspective. Photon Netw Commun 22, 85–97 (2011). https://doi.org/10.1007/s11107-011-0310-6

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  • DOI: https://doi.org/10.1007/s11107-011-0310-6

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