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- W65144685 abstract "Routing and wavelength assignment (RWA) is a very important problem concerning WDM optical network designers and is known to be NP-complete. In this work, we design and implement an algorithm for the static RWA, that is based on a proposed (not integer) linear programming formulation. We claim, that this formulation is able to provide integer optimal solutions (despite its non integral nature) for a large fraction of input instances, yielding thus to corresponding exact RWA solutions. The algorithm's complexity is dominated by the execution time of Simplex LP-solver, that is considered efficient in the great majority of all possible input instances. In transparent (all-optical) networks, the signal quality is subject to a variety of physical impairments, such as polarization mode dispersion (PMD), amplified spontaneous emission (ASE) noise and chromatic dispersion (CD). Those impairments are linearly modeled and are handled effectively by a set of analytical formulae as additional constraints on RWA. We apply our algorithm to perform impairment-constraint based RWA, in order to obtain comparative results of a typical metropolitan network's performance under various network and impairment parameters, such as bit rate, amplifier gain and type, modulation format used, etc." @default.
- W65144685 created "2016-06-24" @default.
- W65144685 creator A5033164190 @default.
- W65144685 date "2006-09-01" @default.
- W65144685 modified "2023-09-26" @default.
- W65144685 title "Δρομολόγηση και ανάθεση συχνοτήτων σε WDM οπτικά δίκτυα" @default.
- W65144685 hasPublicationYear "2006" @default.
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