Journal of Network and Systems Management

, Volume 20, Issue 1, pp 6–33

Forward-Looking WDM Network Reconfiguration with Per-Link Congestion Control

  • Jing Wu
  • James Zhang
  • Gregor von Bochmann
  • Michel Savoie
Article

DOI: 10.1007/s10922-011-9212-2

Cite this article as:
Wu, J., Zhang, J., von Bochmann, G. et al. J Netw Syst Manage (2012) 20: 6. doi:10.1007/s10922-011-9212-2
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Abstract

We study reconfigurations of wavelength-routed Wavelength Division Multiplexing (WDM) networks in response to lightpath demand changes, with the objective of servicing more lightpath demands without additional network resources from a long-term network operation point of view. For the reconfiguration problem under study, we assume WDM network operators are provided with lightpath demands in batches. With limited network resources, our problem has two unique challenges: balancing network resource allocations between current and future lightpath demands, and modeling future lightpath demands. The first challenge implies making tradeoffs between accepting as many current immediate lightpath demands as possible and reserving a certain amount of network resources for near future predicted lightpath demands. The second challenge implies modeling future predicted lightpath demands, which are not exactly known or certain as the current lightpath demands. Our proposed model allows a natural separation between the operation of the optical layer and the user traffic layer (predominantly the IP-layer), while supporting their interactions, for which we propose a new formulation for per-link congestion control, associated with a mathematical solution procedure. Our simulation results reveal that by properly controlling resource allocations in the current session using our proposed mechanism, rejections in future sessions are greatly reduced.

Keywords

Optical networks Traffic engineering Load balancing Traffic models WDM network planning 

Copyright information

© Her Majesty the Queen in Rights of Canada 2011

Authors and Affiliations

  • Jing Wu
    • 1
  • James Zhang
    • 2
  • Gregor von Bochmann
    • 2
  • Michel Savoie
    • 1
  1. 1.Communications Research Centre (CRC) CanadaOttawaCanada
  2. 2.School of Information Technology and EngineeringUniversity of OttawaOttawaCanada

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