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LEI LIU ET AL.
© 2010 Taylor & Francis Group, LLC
In the IP layer, the IP routers are enhanced to support the OpenFlow
protocol and are referred to as OF-Rs. A translucent WSON, with
sparsely but strategically equipped 3R regenerators, is deployed in the
optical layer. Such a translucent network is a promising paradigm for
industrial deployment because extensive studies indicate that it can
provide an adequate trade-off between network cost and service pro-
visioning performance [40]. An OpenFlow/PCE integrated control
plane, as detailed next, is deployed to control this multilayer network
through the OpenFlow protocol, with its functional mod ...