Assessment of Node- and Link- Level Blocking and Creating Cost-Effective Networks in the Era of Large Bandwidth Services

Shuhei YAMAKAMI; Masaki NIWA; Yojiro MORI; Hiroshi HASEGAWA; Ken-ichi SATO; Fumikazu INUZUKA; Akira HIRANO

doi:10.1587/transcom.2018EBP3140

Regular Section

Assessment of Node- and Link- Level Blocking and Creating Cost-Effective Networks in the Era of Large Bandwidth Services

Shuhei YAMAKAMI, Masaki NIWA, Yojiro MORI, Hiroshi HASEGAWA, Ken-ichi SATO, Fumikazu INUZUKA, Akira HIRANO

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Keywords: networks, photonic network, wavelength routing, optical cross-connect, reconfigurable optical add/drop multiplexer

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2019 Volume E102.B Issue 3 Pages 510-521

DOI https://doi.org/10.1587/transcom.2018EBP3140

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Abstract

Link-level and node-level blocking in photonic networks has been intensively investigated for several decades and the C/D/C approach to OXCs/ROADMs is often emphasized. However, this understanding will have to change in the future large traffic environment. We herein elucidate that exploiting node-level blocking can yield cost-effective large-capacity wavelength routing networks in the near future. We analyze the impact of link-level and node-level blocking in terms of traffic demand and assess the fiber utilization and the amount of hardware needed to develop OXCs/ROADMs, where the necessary number of link fibers and that of WSSs are used as metrics. We clarify that the careful introduction of node-level blocking is the more effective direction in creating future cost effective networks; compared to C/D/C OXCs/ROADMs, it offers a more than 70% reduction in the number of WSSs while the fiber increment is less than ~2%.

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