Link-state update policies for all-optical DWDM transport networks

Ala Al-Fuqaha*, Ghulam Chaudhry, Cory Beard, Mohsen Guizani, Miguel Labrador, Ibrahim Habib

*Corresponding author for this work

Research output: Contribution to journalConference articlepeer-review

2 Citations (Scopus)

Abstract

It has been demonstrated that advertising the availability of wavelength and converter resources in all-optical DWDM transport networks with sparse wavelength conversion capabilities can drastically improve the blocking performance of these networks thus achieving better usage of the network resources. An important aspect with consequences in network performance is when to originate the wavelength-availability and converter-availability Link State Advertisements (LSAs). Frequent link-state advertisements could overwhelm the network control plane with many update messages that need to be processed. On the other hand, delaying these advertisements could result in inaccurate link-state information thus degrading the network blocking performance. In this paper, we propose two different link-state update policies to advertise the availability of wavelength and converter resource in all-optical DWDM transport networks with sparse wavelength conversion capabilities. The first one is very simple and serves as our base policy for comparison. The second policy, which is very efficient in handling the dynamic nature of all-optical DWDM networks with different degrees of wavelength conversion, reduces the number of LSAs considerably while maintaining the call blocking probability.

Original languageEnglish
Pages (from-to)1831-1835
Number of pages5
JournalConference Record - International Conference on Communications
Volume3
DOIs
Publication statusPublished - 2004
Externally publishedYes
Event2004 IEEE International Conference on Communications - Paris, France
Duration: 20 Jun 200424 Jun 2004

Keywords

  • All-optical networks
  • DWDM
  • Fuzzy logic
  • LSA
  • Link-State routing
  • OSPF
  • Wavelength conversion

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