High degree of heterogeneity of future optical networks, stemming from provisioning of services with different quality-of-transmission requirements, and transmission links employing mixed modulation formats or switching techniques, will pose a challenge for the control and management of the network. The incorporation of cognitive techniques can help to optimize a network by employing mechanisms that can observe, act, learn and improve network performance, taking into account end-to-end goals. The EU project CHRON: Cognitive Heterogeneous Reconfigurable Optical Network proposes a strategy to efficiently control the network by implementing cognition. In this paper we present a survey of different techniques developed throughout the course of the project to apply cognition in future optical networks.
Journal of Lightwave Technology, 2014, Vol 32, Issue 13, p. 2308-2323
ENGINEERING,; OPTICS; TELECOMMUNICATIONS; NONLINEAR TRANSMISSION PERFORMANCE; DIGITAL COHERENT RECEIVERS; CHROMATIC DISPERSION; OFDM SYSTEMS; QUALITY; EXPRESSIONS; PROPAGATION; ESTIMATOR; Cognition; cognitive networks; energy consumption; heterogeneous optical networks; optical performance monitoring (OPM); cognitive radio; modulation; radio links; telecommunication control; Communication, Networking and Broadcast Technologies; Photonics and Electrooptics; CHRON project; cognitive optical networks; Computer architecture; EU project; mixed modulation; Modulation; Monitoring; network control; network management; Network topology; Optical fiber networks; quality-of-transmission requirements; reconfigurable optical networks; service provisioning; switching techniques; Topology; transmission links; heterogeneous opticalnetworks; Energy utilization; Optical communication; Cognitive network; Control and management; Modulation formats; Optical performance monitoring; Reconfigurable optical network; Switching techniques; Quality control