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In order to establish a virtual topology for a given physical topology, in a small WDM network i.e. with four to six nodes, the authors are considering traffic as the constraint. Another important factor is the virtual degree constraint, which is equal to the number of transmitters and receivers supported by a node in the network. The virtual topologies are designed using Decreasing Traffic Sequence Virtual Topology Design (DTS-VTD) algorithm and Traffic Independent Virtual Topology Design (TI-VTD) algorithms, with varying virtual degree value. In the designed virtual topologies, the hops occur without violating the wavelength conflicting constraint.
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