Hierarchical routing in multi-domain optical networks

Q. Liu, M. A. Kök, N. Ghani, A. Gumaste

Research output: Contribution to journalArticlepeer-review

78 Scopus citations


Given the increasing adoption of DWDM networking technology, there is now a growing need to address distributed inter-domain lightpath provisioning issues. Although inter-domain provisioning has been well studied for packet/cell-switching networks, the wavelength dimension presents many additional challenges. To address this challenge, a detailed hierarchical routing GMPLS-based framework for provisioning all-optical and opto-electronic multi-domain DWDM networks is presented. The scheme adapts various topology abstraction schemes to improve routing scalability and lower inter-domain blocking probabilities. Related inter-domain lightpath RWA and signaling schemes are also tabled. Performance analysis results are also presented to demonstrate the effectiveness of the proposed mechanisms along with directions for future research work.

Original languageEnglish (US)
Pages (from-to)122-131
Number of pages10
JournalComputer Communications
Issue number1
StatePublished - Dec 15 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Computer Networks and Communications


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


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