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We have introduced a novel metro network architecture called Ultra-Dense Wavelength Switched Network (UD-WSN) [1], which enables an even fine spectrum granularity so as to efficiently accommodate low-speed metro services (e.g., 1GE/10GE services). We evaluate the performance of this type of networks with spectrum defragmentation and partial optical transport network (OTN) switching. An efficient spectrum...
We present a novel strategy for the operation of a mixed fixed/flexible grid optical network which would be useful for the gradual migration from a fixed to a flexible mode of operation. Routing and spectrum allocation (RSA) in co-existing fixed/flexible grid optical networks with a multi-path sub-band virtual concatenation (VCAT) technique is considered. An integer linear programming (ILP) model...
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