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In transparent wavelength switched optical networks (WSON), physical impairments (PI) may be accumulated along the lightpaths which are set up entirely within the optical domain. The lightpaths may not be established successfully due to physical impairments accumulation. Path computation in multi-domain optical networks has attracted much attention, and a backward recursive PCE-based computation approach...
As a key problem in wavelength switched optical networks (WSON) in which wavelengths are the most important resources, routing and wavelength assignment (RWA) problem has been researched extensively. Due to the advantages of path computation in multi-layer and multi-domain networks, especially in multi-constraints scenarios, path computation element (PCE) has been introduced into WSON, which provides...
The routing and wavelength assignment optimization problem in multi-domain WSON is researched. An inter-domain routing optimization algorithm based on improved ant colony algorithm is proposed. The proposed algorithm can achieve the routing optimization under multi-constraint condition, and can acquire the working and backup paths at one time for network survivability as well. Simulation experiments...
As a key problem in wavelength-switched optical networks (WSONs), in which wavelengths are the most important resources, the routing and wavelength assignment (RWA) problem has been researched extensively. Due to the advantages of path computation in multilayer and multidomain networks, especially in multiconstraint scenarios, the path computation element (PCE) has been introduced into WSONs, which...
We experimentally investigate impairment aware routing and end-to-end compensation in a WSON testbed. The extended control plane modules for QoT optimization and two compensation control strategies are realized and verified in terms of optical power adaptive adjustment.
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