PROJECT TITLE :

Toward terabit autonomic optical networks based on a software defined adaptive/cognitive approach [invited]

ABSTRACT:

Terabit elastic optical networking (EON) is foreseen as a viable answer to extend the lifetime of a network exploiting the available bandwidth in previously deployed optical fibers. EON relies on bandwidth-variable transponders capable of supporting multiple bit rates and/ or modulation formats in keeping with traffic requirements and node architectures that route arbitrary channel band-widths. Thus, EON will increase the heterogeneity of the network, which may create the need for autonomie adaptive and/or cognitive techniques. During this context, the software-outlined networking (SDN) paradigm emerges as an chance to enable such techniques thanks to the centralized read of the network by decoupling the management plane and the info plane. This paper surveys totally different activities applied at the Optical Technologies Division in Centro de Pesquisa e Desenvolvimento em Telecomunica????es, Brazil. We review an optical transport SDN controller for virtual optical networks that supports 2 adaptive algorithms. 1st, the autonomie flexible transponder reconfigures the transmission modulation format according to a threshold level. Second, the adaptive global spectrum equalization reconfigures the wavelengths' attenuation profiles applied at the optical nodes to boost the signals' optical signal-to-noise ratio (OSNR) at reception. Finally, we tend to report experimental results of an in-band OSNR monitor for advanced modulation formats.


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