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On the importance of time-synchronized operations in Software-Defined electronic and optical networks

The utilization of time-synchronized operations (TSO) is gaining interest in the research community on Software-Defined Networking (SDN). This paper discusses TSO applicability in electronic packet and optical networks. In electronic packet networks, the TSO approach has been shown to improve network performance, thanks to timed network updates. In optical networks, this approach enables novel security applications and permits to reduce lightpath disruption time. We finally discuss TSO further potentialities and requirements regarding clock availability in network elements.