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Impairments
in optical networks can be accounted for in a
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number
of ways as discussed in the Impairment
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Framework
draft . This draft provides an information
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model
for path validation in optical networks utilizing
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approximate
computations.
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The
definitions, characteristics and usage of the optical
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parameters
that form this model are based on ITU-T
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recommendation
G.680 and related. We do not define any
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new
impairment parameters here.
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This
impairment related model is intentionally compatible
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with
the impairment free model of reference [RWA-Info].
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Appendix
A presents a model for distributed estimation of
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impairment
parameters (R+ distributed WA & IV).
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