Methods and systems for the performance analysis of fiber optic networks
First Claim
1. A method for the performance analysis of fiber optic networks, the method comprising:
- performing signal propagation modeling for a fiber optic network of interest by;
providing a computer with signal propagation modeling data related to the fiber optic network of interest for calculation of impairments;
separating the fiber optic network into a plurality of segments comprising individual non-overlapping segments defined by one or more optical add/drop placements;
performing an optical line amplifier (OLA) chain analysis on the computer of each of the plurality of segments based upon the modeling data;
performing an impairment analysis on the computer of each of the plurality of segments based upon the statistical modeling data associated with fibers on each of the plurality of segments to provide a signal propagation model through the fiber optic network of interest, wherein the impairment analysis is performed separately for each of the plurality of segments;
calculating, using software resident in a computer, the impairments for a signal in the fiber optic network based upon the impairment analysis of each of the plurality of segments, wherein, if the signal traverses more than one of the plurality of segments, calculating the impairments for the signal as a concatenation of the impairments for the more than one of the plurality of segments; and
if impairments of one segment of the plurality of segments change, reapplying the one or more concatenation rules only adjusting the one segment to compute a revised overall impairment.
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Accused Products
Abstract
In general, the present invention provides novel approaches to signal propagation modeling that utilize the following: 1) geographic segmentation is applied by separating a large fiber optic network into individual non-overlapping segments, defined by optical add/drop placements; 2) impairment segmentation is applied, such that optical noise, self-phase, cross-phase, four-wave mixing, and other impairments are all treated separately; 3) each impairment is calculated by the most efficient approach to achieve the minimum required accuracy, the approaches being fully numeric, semi-analytic, or empirical; 4) impairment concatenation rules are applied to compute an overall impairment experienced by a signal that traverses more than one segment; and 5) impairment scaling rules are applied to rapidly estimate changes in configuration that can lead to improved performance (i.e. higher capacity, longer distance, or lower cost).
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Citations
20 Claims
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1. A method for the performance analysis of fiber optic networks, the method comprising:
performing signal propagation modeling for a fiber optic network of interest by; providing a computer with signal propagation modeling data related to the fiber optic network of interest for calculation of impairments; separating the fiber optic network into a plurality of segments comprising individual non-overlapping segments defined by one or more optical add/drop placements; performing an optical line amplifier (OLA) chain analysis on the computer of each of the plurality of segments based upon the modeling data; performing an impairment analysis on the computer of each of the plurality of segments based upon the statistical modeling data associated with fibers on each of the plurality of segments to provide a signal propagation model through the fiber optic network of interest, wherein the impairment analysis is performed separately for each of the plurality of segments; calculating, using software resident in a computer, the impairments for a signal in the fiber optic network based upon the impairment analysis of each of the plurality of segments, wherein, if the signal traverses more than one of the plurality of segments, calculating the impairments for the signal as a concatenation of the impairments for the more than one of the plurality of segments; and if impairments of one segment of the plurality of segments change, reapplying the one or more concatenation rules only adjusting the one segment to compute a revised overall impairment. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16)
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17. A computer implemented fiber optic modeling method, comprising:
performing signal propagation modeling for a fiber optic network by; segmenting the fiber optic network by separating the fiber optic network into a predetermined number of non-overlapping segments defined by one or more optical add/drop placements; statistically modeling a plurality of impairments for each of the predetermined number of non-overlapping segments using software resident in a computer; calculating an overall impairment for a signal through the fiber optic network utilizing a concatenation through one or more concatenation rules of the statistically modeled plurality of impairments for each of the predetermined number of non-overlapping segments over which the signal traverses; and based on a change related to a particular segment, recalculating a revised overall impairment for the signal based on the change, wherein the one or more concatenation rules are configured to enable recalculation of the revised overall impairment based on changes in the particular segment through recalculating the particular segment and reapplying the concatenation rules. - View Dependent Claims (18)
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19. A system for fiber optic modeling, comprising:
a computer comprising data related to a fiber optic network, wherein the computer is configured to perform signal propagation modeling for the fiber optic network by; segmenting the fiber optic network by separating the fiber optic network into a predetermined number of non-overlapping segments defined by one or more optical add/drop placements; statistically modeling a plurality of impairments for each of the predetermined number of non-overlapping segments using software resident in the computer; calculating an overall impairment for a signal through the fiber optic network utilizing a concatenation through one or more concatenation rules of the statistically modeled plurality of impairments for each of the predetermined number of non-overlapping segments over which the signal traverses; and based on a change related to a particular segment, recalculating a revised overall impairment for the signal based on the change, wherein the one or more concatenation rules are configured to enable recalculation of the revised overall impairment based on changes in the particular segment through recalculating the particular segment and reapplying the concatenation rules. - View Dependent Claims (20)
Specification