Logical optical line terminal placement optimization in the elastic lambda aggregation network with optical distribution network constraints

Takehiro Sato, Kunitaka Ashizawa, Hidetoshi Takeshita, Satoru Okamoto, Naoaki Yamanaka, Eiji Oki

Research output: Contribution to journalArticle

3 Citations (Scopus)


The elastic lambda aggregation network (EλAN) has been presented as an access/aggregation integrated network that can accommodate multiple network services. In the EλAN, optical line terminals (OLTs) become programmable and configure logical OLTs (L-OLTs) to support network services that have different protocols and quality of service requirements. To achieve the flexible utilization of network resources and improve energy efficiency, L-OLTs are migrated between programmable OLTs like virtual machines. In this paper, an integer linear programming (ILP) model of the L-OLT placement optimization problem with optical distribution network constraints is presented. Based on this ILP model, the communication suspension time that occurs with L-OLT migration is investigated. We discuss the modification of the L-OLT migration sequence to reduce the communication suspension time. The impact of the modification on the energy saving effect of L-OLT placement optimization is evaluated in this paper.

Original languageEnglish
Article number7255259
Pages (from-to)928-941
Number of pages14
JournalJournal of Optical Communications and Networking
Issue number9
Publication statusPublished - 2015 Sep



  • Energy efficient network
  • Integer linear programming
  • Next generation networking
  • Optical access network

ASJC Scopus subject areas

  • Computer Networks and Communications

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