A bandwidth bottleneck resolution approach to node configuration optimization in WDM ring networks

Megumi Isogai, Nobuo Funabiki, Yosuke Isshiki, Toru Nakanishi

Research output: Chapter in Book/Report/Conference proceedingConference contribution


The wavelength-division multiplexing (WDM) technology has been extensively studied as a key technology to solve global information explosions. WDM multiplexes plural signal paths using different wavelengths into one optical fiber. Among WDM-based network architectures, this paper focuses on a double-ring network for a next-generation metropolitan area network (MAN). Each node is normally equipped with two pairs of fast-tunable transmitters and wavelength-fixed receivers (TT-FR) as interface to two fibers. To enhance the network performance, additional transmitters/receivers at nodes and receiver wavelengths should be assigned optimally depending on its design requirement, so that the bandwidth bottleneck can be resolved both on nodes and fibers. This paper formulates this node configuration problem as a combinatorial optimization problem and presents its two-phase heuristic algorithm using the greedy and variable depth search (VDS) methods. Our approach is evaluated through network simulations, where the results verify the effectiveness of this joint assignment approach.

Original languageEnglish
Title of host publicationProceedings of the 2008 IEEE Sarnoff Symposium, SARNOFF
Publication statusPublished - 2008
Event2008 IEEE Sarnoff Symposium, SARNOFF - Princeton, NJ, United States
Duration: Apr 28 2008Apr 30 2008

Publication series

NameProceedings of the 2008 IEEE Sarnoff Symposium, SARNOFF


Other2008 IEEE Sarnoff Symposium, SARNOFF
Country/TerritoryUnited States
CityPrinceton, NJ

ASJC Scopus subject areas

  • Electrical and Electronic Engineering


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