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deployments of these models to date because the GMPLS UCP is too
complicated. On the other hand, SDN and OpenFlow, which allow
operators to control the network using software running on a network
operating system (e.g., Nox) within an external controller, provide the
maximum flexibility for the operator to control an optical network
and match the carrier’s preferences given its flexibility, simplicity, and
manageability.
In light of this, in the book chapter, we reviewed recent research
activities related to the SDN/OpenFlow deployment for metro/back-
bone optical switching networks. We first introduced the motivation
of this deployment and then detailed the SDN/OpenFlow for tradi-
tional WSON. ...