Routing scalability in multi-domain DWDM networks

Qing Liu, Chongyang Xie, Tannous Frangieh, Nasir Ghani, Ashwin Gumaste, Nageswara S.V. Rao

Research output: Contribution to journalArticlepeer-review

9 Scopus citations


This paper studies routing scalability in multi-domain DWDM networks. Although inter-domain provisioning has been well studied for packet/cell-switching networks, the wavelength dimension (along with wavelength conversion) poses many challenges in multi-domain DWDM settings. To address these concerns a detailed GMPLS-based hierarchical routing framework is proposed for multi-domain DWDM networks with wavelength conversion. This solution uses mesh topology abstraction schemes to hide domain-internal state. However related inter-domain routing loads can be significant here, growing by the square of the number of border nodes. To address these scalability limitations, improved inter-domain routing update strategies are also proposed and the associated performance of inter-domain lightpath RWA and signaling schemes studied.

Original languageEnglish (US)
Pages (from-to)63-74
Number of pages12
JournalPhotonic Network Communications
Issue number1
StatePublished - Feb 2009
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Software
  • Atomic and Molecular Physics, and Optics
  • Hardware and Architecture
  • Computer Networks and Communications
  • Electrical and Electronic Engineering


  • Full wavelength conversion
  • Inter-domain DWDM routing
  • Multi-domain networks
  • Optical networks
  • Topology abstraction


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