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POSTER: A New Approach to Impairment-Aware Static RWA in Optical WDM Networks

  • Sebastian Zawada
  • Shrestharth Ghosh
  • Fangyun Luo
  • Sriharsha Varanasi
  • Arunita Jaekel
  • Subir Bandyopadhyay
Part of the Lecture Notes in Computer Science book series (LNCS, volume 7730)

Abstract

In order to set up a number of lightpaths to satisfy user requirements for data communication, the static (also called offline) Route and Wavelength Assignment (RWA) problem must be solved. The quality of transmission (QoT) of an optical signal propagating through an optical network degrades, due to physical layer considerations such as optical noise, chromatic and polarization mode dispersion, four wave mixing, cross-phase modulation and cross-talk [4]. This leads to an increase in the Bit Error Rate (BER) of the optical signal and the corresponding lightpath becomes infeasible for communication if the BER value crosses a certain threshold limit. We have used an analytical model proposed by Pereira et al [3] to estimate the BER. The interdependence between the physical and the network layers makes the RWA problem in the presence of impairments a cross-layer optimization problem [1]. To address this problem, a number of approaches are emerging, usually referred to as impairment-aware-RWA (or IARWA) algorithms that take into account the interaction between the network and the physical layers. Our objective is to design a transparent network, where the IA-RWA algorithm must provision lightpaths so that the BER value of each lightpath never exceeds a given threshold.

References

  1. 1.
    Christodoulopoulos, K., Manousakis, K., Varvarigos, E.: Offline routing and wavelength assignment in transparent wdm networks. IEEE/ACM Transactions on Networking 18(5), 1557–1570 (2010)CrossRefGoogle Scholar
  2. 2.
    Ezzahdi, M.A., Al Zahr, S., Koubaa, M., Puech, N., Gagnaire, M.: Lerp: a quality of transmission dependent heuristic for routing and wavelength assignment in hybrid wdm networks. In: Proceedings of the15th International Conference on Computer Communications and Networks, ICCCN 2006, pp. 125–136 (October 2006)Google Scholar
  3. 3.
    Pereira, H.A., Chaves, D.A.R., Bastos-Filho, C.J.A., Martins-Filho, J.F.: Osnr model to consider physical layer impairments in transparent optical networks. Journal of Photonic Network Communications 18, 137–149 (2009)CrossRefGoogle Scholar
  4. 4.
    Shen, G., Tucker, R.S.: Translucent optical networks: the way forward. IEEE Communications Magazine 45, 48–54 (2007)CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Sebastian Zawada
    • 1
  • Shrestharth Ghosh
    • 1
  • Fangyun Luo
    • 1
  • Sriharsha Varanasi
    • 1
  • Arunita Jaekel
    • 1
  • Subir Bandyopadhyay
    • 1
  1. 1.School of Computer ScienceUniversity of WindsorCanada

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