Abstract
We investigate the design and planning of translucent optical networks
with heterogeneous signal modulation formats. By employing multiple signal
modulation formats of different optical reaches in the network, the required
number of optical regenerators can be minimized. Hence, the overall network
deployment capital cost and operational cost are much reduced. By building
auxiliary graphs, a novel integer linear programming (ILP) is formulated to
minimize the overall weighted network cost. Also, an effective heuristic is
proposed to tackle networks of much larger scales. Numerical simulation studies
indicate that our approach can achieve significant savings in overall network
costs.
© 2012 IEEE
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