Software Defined Wavelengths: maximize photonic infrastructure usage and secure services

Kristian Andersson
TrackTrack 1 Europaea Room
SessionSDN
DescriptionOptical transmission advances have not kept pace with cloud-based traffic growth in terms of the ability to provide network elasticity in a cost-efficient manner. This is mainly because network control functions were not designed to utilize the evolving reconfiguration capabilities of optoelectronic interfaces and photonic cross-connects. Cloud-driven services require simultaneous access to networking, computing and storage resources that are spread over different geographical separated datacenters. This type of traffic demand is pushing optical network reconfiguration to be more reactive.  
The dynamic dimensions of collaborations among R&E networks trigger new infrastructure requirements such as improved joint control of networking resource allocation to guarantee latency, and connectivity. Management of the optical transport network should be enhanced to integrate the knowledge of two-way flows of data to be transported onto secure network services. Furthermore, as fundamental spectral efficiency limits of single-mode fibers are almost reached, the capabilities of conventional WDM networks operating on fixed frequencies in conventional wavelength bands are too restricted. Additionally, to deliver secure virtual connectivity, central, uniform network control helps orchestrate secure, spectrally and spatially flexible optical networks.  
To build an elastic optical network, the optical transceivers have to be flexible in symbol rate, modulation format, number of active network media channels without impacting data traffic service.  
Spectrum reallocation without service disruption is becoming possible during network operation. Elastic optical networks allow allocation from very narrow optical channel slots, to very large capacity network media channels (e.g. 1Tb/s or higher), and this dynamic reconfiguration of optical system interfaces is an opportunity to match the offered bandwidth to the required bandwidth of the Cloud services.  
This talk will summarize findings in the needs and advances in optical transport, switching and control mechanisms that bring the software defined wavelength concept to reality.

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