Abstract
This paper considers the design and dimensioning of translucent optical
networks based on the concept of optical transparent islands. In systems with
dispersion compensation, amplified spontaneous emission (ASE) noise becomes
a dominant physical-layer impairment in constraining the maximal transparent
reach limit of a lightpath. Taking this dominant impairment into account,
an efficient transparent island division algorithm is proposed to divide a
large transport network into a few optical transparent islands and to minimize
the total number of opaque island-border nodes. Optimization models for translucent
network dimensioning are presented to maximize served traffic demand given
certain network capacity and to minimize the required wavelength capacity
given a certain traffic demand matrix. Simulation studies show that the proposed
transparent island division approach and network-dimensioning optimization
models require only 25% opaque nodes to overcome the constraint of transparent
reach limit and achieve performance as good as that of a more expensive 100%
opaque network.
© 2009 IEEE
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