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Spatial division multiplexing for high capacity optical interconnects in modular data centers
KTH, School of Information and Communication Technology (ICT), Communication Systems, CoS.
KTH, School of Information and Communication Technology (ICT), Communication Systems, CoS, Optical Network Laboratory (ON Lab).
KTH, School of Information and Communication Technology (ICT), Communication Systems, CoS, Optical Network Laboratory (ON Lab).
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2017 (English)In: Journal of Optical Communications and Networking, ISSN 1943-0620, E-ISSN 1943-0639, Vol. 9, no 2, A143-A153 p., 7858118Article in journal (Refereed) Published
Abstract [en]

Modular design has recently emerged as an efficient solution to build large data center (DC) facilities. Modular DCs are based on stand-Alone prefabricated modules (i.e., PODs) that can be easily installed and interconnected. PODs can generate a large amount of traffic and thus require an ultra-high-capacity interconnection network. However, current electronic and optical interconnect architectures applied to modular DCs may experience major scalability problems in terms of high energy consumption and cabling complexity. To address these problems, we investigate five optical interconnect architectures based on spatial division multiplexing (SDM), and for each architecture, we propose a resource allocation strategy. We also present an extensive comparison among the SDM architectures in terms of cost and performance (i.e., blocking probability and throughput), with the objective to find the architecture offering the best trade-off between cost and performance for given DC sizes and traffic load values. Our results demonstrate that, in small modular DCs with low traffic load, an architecture based only on SDM is the best option, while in medium DCs with medium traffic load, an architecture based on coupled SDM and flexgrid wavelength division multiplexing (WDM) with spectral flexibility is the best solution. Finally, for large DCs with high traffic load values, the best trade-off between cost and performance is achieved by an SDM architecture that is based on uncoupled SDM and flexgrid WDM.

Place, publisher, year, edition, pages
Optical Society of America, 2017. Vol. 9, no 2, A143-A153 p., 7858118
Keyword [en]
Cost analysis, Data centers, Optical interconnects, Resource allocation, Spatial division multiplexing (SDM)
National Category
Communication Systems
Identifiers
URN: urn:nbn:se:kth:diva-208146DOI: 10.1364/JOCN.9.00A143ISI: 000395889500003Scopus ID: 2-s2.0-85013456485OAI: oai:DiVA.org:kth-208146DiVA: diva2:1104353
Funder
Swedish Research CouncilSwedish Foundation for Strategic Research
Note

QC 20170601

Available from: 2017-06-01 Created: 2017-06-01 Last updated: 2017-06-01Bibliographically approved

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Fiorani, MatteoChen, JiajiaWosinska, Lena
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Citation style
  • apa
  • harvard1
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