On the value proposition of the contentionless add/drop ROADM property in DWDM transport networks

New ROADM nodes being deployed in DWDM transport networks can already benefit from add/drop structures that support both colourless and directionless properties, thereby enabling to transmit/receive signals to/from any wavelength and direction. Depending on the ROADM architecture, these two properti...

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Bibliographic Details
Published inInternational Conference on Transparent Optical Networks (Print) pp. 1 - 6
Main Authors Pedro, Joao, Pato, Silvia
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.07.2014
Subjects
node architecture
operational expenditures
Optical fibers
Optical switches
Planning
Ports (Computers)
Routing
routing and wavelength assignment
Telecommunication traffic
transport network
Wavelength division multiplexing
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ISSN2162-7339
DOI10.1109/ICTON.2014.6876335

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Summary:New ROADM nodes being deployed in DWDM transport networks can already benefit from add/drop structures that support both colourless and directionless properties, thereby enabling to transmit/receive signals to/from any wavelength and direction. Depending on the ROADM architecture, these two properties can be further enhanced by the contentionless one, which guarantees that any free add/drop port can be used for a given wavelength and direction regardless of whether the same wavelength is already in use via other add/drop ports. The relevance of the later property has been the subject of debate in the literature and industry. This paper overviews the value proposition of contentionless over a multi-period planning scenario, aiming to highlight to which extent avoiding contention at the add/drop side is expected to provide savings in operational expenditures.
ISSN:2162-7339
DOI:10.1109/ICTON.2014.6876335