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A critical challenge in an optical network is to provide the capability to instantiate and route lightpaths in real time and to support a variety of protection and restoration capabilities required by the rapidly evolving IP over WDM (Wavelength Division Multiplexing). This requires efficient Control Plane (CP) mechanisms to dynamically establish and tear down lightpaths. The authors investigate two different CP architectures and investigate the suitability of each for traffic engineering. They address some service provider requirements and concept based functionality mapping including interconnection network models of CP.
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