Abstract
Terabit elastic optical networking (EON) is foreseen as a viable solution to extend the lifetime of a network exploiting the available bandwidth in previously deployed optical fibers. EON is based on bandwidth-variable transponders capable of supporting multiple bit rates and/or modulation formats according to traffic requirements and node architectures that route arbitrary channel bandwidths. Thus, EON increases the heterogeneity of the network, which may create the need for autonomic adaptive and/or cognitive techniques. In this context, the software-defined networking (SDN) paradigm emerges as an opportunity to enable such techniques thanks to the centralized view of the network by decoupling the control plane and the data plane. This paper surveys different activities carried out at the Optical Technologies Division in Centro de Pesquisa e Desenvolvimento em Telecomunicações, Brazil. We review an optical transport SDN controller for virtual optical networks that supports two adaptive algorithms. First, the autonomic 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 improve the signals’ optical signal-to-noise ratio (OSNR) at reception. Finally, we report experimental results of an in-band OSNR monitor for advanced modulation formats.
© 2015 Optical Society of America
Full Article | PDF ArticleMore Like This
Robert Borkowski, Ramón J. Durán, Christoforos Kachris, Domenico Siracusa, Antonio Caballero, Natalia Fernández, Dimitrios Klonidis, Antonio Francescon, Tamara Jiménez, Juan Carlos Aguado, Ignacio de Miguel, Elio Salvadori, Ioannis Tomkos, Rubén M. Lorenzo, and Idelfonso Tafur Monroy
J. Opt. Commun. Netw. 7(2) A344-A355 (2015)
Reza Nejabati, Shuping Peng, Bingli Gou, Mayur Channegowda, and Dimitra Simeonidou
J. Opt. Commun. Netw. 7(12) B222-B231 (2015)
Ignacio de Miguel, Ramón J. Durán, Tamara Jiménez, Natalia Fernández, Juan Carlos Aguado, Rubén M. Lorenzo, Antonio Caballero, Idelfonso Tafur Monroy, Yabin Ye, Andrzej Tymecki, Ioannis Tomkos, Marianna Angelou, Dimitrios Klonidis, Antonio Francescon, Domenico Siracusa, and Elio Salvadori
J. Opt. Commun. Netw. 5(10) A107-A118 (2013)