Signaling and Control of Dynamically Switched Optical Networks

O. Yu (USA)


Control Plane, Optical Switched Network


To control the emerging optical switched networks based on wavelength switching technology, the Automatically Switched Optical Networks (ASON) and the Generalized MultiProtocol Label Switching (GMPLS) are being specified as the control plane architectures to enable edge devices of user domains to provision lightpath connection services dynamically over optical switched networks. This paper extends these control plane architectures by enabling user applications to execute dynamic provisioning of lightpaths. Lightpath provisioning requires routing and wavelength (RWA) assignment. In the absence of wavelength conversion, wavelength continuity constraint dictates that a lightpath must use the same wavelength on each link in its route. The paper proposes a wavelength reservation protocol to enable end to-end robust wavelength assignment.

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