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In order to solve the wavelength resource reserve collision problem in distributed wavelength assignment scenario for PCE/GMPLS-based WSONs, a half-centralized wavelength assignment scheme has been proposed, which efficiently avoids the collision by adding several functions to PCE and does some extensions to the GMPLS signaling.
Proposed in this paper is a PCE-Assistant Collision-Avoiding Wavelength Assignment Scheme (PACAWAS) for transparent Wavelength Switched Optical Networks (WSONs) to solve the resource contention problem in distributed wavelength assignment scenario. In this scheme, several extensions are made to the GMPLS (Generalized Multi Protocol Label Switching) signaling, and a wavelength selection assistant unit...
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