APPARATUS FOR ASSIGNING WAVELENGTH IN WDM RING-TYPE OPTICAL NETWORK AND METHOD THEREFOR

摘要

PURPOSE: An apparatus for assigning a wavelength in a WDM(Wavelength Division Multiplexing) ring-type optical network and a method therefor are provided to dynamically assign the wavelength according to the state of the network in consideration of a sparse wavelength conversion and a limited wavelength conversion. CONSTITUTION: A node unit(30) has a plurality of nodes, and receives a call setup request from the outside. A wavelength assignment control unit(20) connects to the node unit(30), and calculates usable paths between the nodes by a sparse wavelength conversion and a limited wavelength conversion, when the call setup request is generated. The wavelength assignment control unit(20) calculates the total number of gaps per usable path, and assigns a wavelength to a path with the minimum total number of the gaps.