Distributed inter-domain lightpath provisioning in the presence of wavelength conversion

Q. Liu, N. Ghani, N. S.V. Rao, A. Gumaste, M. L. Garcia

Research output: Contribution to journalArticlepeer-review

6 Scopus citations


Dense wavelength division multiplexing (DWDM) has become the dominant transport layer technology for next-generation backbone networks due to its unprecedented capacity scalability. As a result, there is a pressing need to investigate lightpath provisioning 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) presents many added challenges. To address these concerns, a detailed GMPLS-based hierarchical routing framework for provisioning transparent/translucent/opaque multi-domain DWDM networks is presented. The scheme adapts topology abstraction to hide internal domain state so as to resolve routing scalability and security issues. Specifically a novel full-mesh topology abstraction scheme is developed for full wavelength conversion domains, i.e., to disseminate additional wavelength converter state. Related inter-domain lightpath RWA and signaling schemes are also tabled. Performance analysis results are then presented to demonstrate the effectiveness of the proposed mechanisms along with directions for future research work.

Original languageEnglish (US)
Pages (from-to)3662-3675
Number of pages14
JournalComputer Communications
Issue number18
StatePublished - Dec 10 2007
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications


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


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