Abstract
The advancement of ultralong-haul transmission technology has dramatically enhanced the all-optical reaches.
However, the actual situations of installed fiber and sites for terrestrial network often prevent implementing a
purely transparent network, and thus, opaque reshaping retiming regenerating (3R) regeneration is required to
guarantee optical signal reachability. Since 3R regenerators based on optical/electrical/optical conversion tend to
dominate the total network costs, an efficient network design method that allocates a minimum number of 3R
regenerators to optimum locations is essential to build a cost-effective photonic network. In this paper, we propose
such a network-dimensioning method by combining the advantages of link-based and path-based design approaches. It
first guarantees optical signal reachability for any possible traffic demand in each segmented linear link. After
combining all the links, excessive regenerators are eliminated based on the optical signal quality check with Q-factor calculation for each wavelength path. A trial design
of a large-scale mesh network demonstrated a significant cost savings of more than 30% in comparison with a
conventional link-based design. In the trial, the impact of fiber loss coefficient over the total network cost was
investigated quantitatively, addressing the importance of such quantitative modeling and analysis.
© 2007 IEEE
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