Cost comparison of different translucent optical network architectures

Maarten De Groote, Konstantinos Manousakis, Panagiotis Kokkinos, Didier Colle, Mario Pickavet, Konstantinos Christodoulopoulos, Emmanouel Varvarigos, Piet Demeester

Research output: Chapter in Book/Report/Conference proceedingConference PaperResearchpeer-review

18 Citations (Scopus)


Ever-increasing bandwidth demands and higher flexibility are the main challenges for the next generation optical core networks. A new trend in order to address these challenges is to consider the impairments of the lightpaths during the design of optical networks. In our work, we focus on translucent optical networks, where some lightpaths are routed transparently, whereas others go through a number of regenerators. We present a cost analysis of design strategies, which are based either on an exact Quality of Transmission (QoT) validation or on a relaxed one and attempt to reduce the amount of regenerators used. In the exact design strategy, regenerators are required if the QoT of a candidate lightpath is below a predefined threshold, assuming empty network conditions. In the relaxed strategy, this predefined threshold is lower, while it is assumed that the network is fully loaded. We evaluate techno-economically the suggested design solutions and also show that adding more flexibility to the optical nodes has a large impact to the total infrastructure cost.

Original languageEnglish
Title of host publication2010 9th Conference of Telecommunication, Media and Internet, CTTE 2010
Publication statusPublished - 2010
Externally publishedYes
Event2010 9th Conference of Telecommunication, Media and Internet, CTTE 2010 - Ghent, Belgium
Duration: 7 Jun 20109 Jun 2010


Conference2010 9th Conference of Telecommunication, Media and Internet, CTTE 2010


  • Cost analysis
  • Network dimensioning
  • Next-generation optical core
  • Physical layer impairments
  • Routing and wavelength assignment

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