Invention Grant
US09160477B2 Virtual networking embedding procedure in an optical wavelength division multiplexing (WDM) network 有权
虚拟网络嵌入过程在光波分复用(WDM)网络中

Virtual networking embedding procedure in an optical wavelength division multiplexing (WDM) network
Abstract:
A method implemented in a network apparatus used in a wavelength division multiplexing (WDM) optical network is disclosed. The method includes (a) selecting unconsidered virtual link (VL) (i,j) with a maximum cost, a cost being requested line rate rij on VL(i,j)×shortest distance between nodes i and j, (b) selecting unconsidered route k out of K-shortest routes between nodes i and j of VL(i,j), (c) determining a bit map of unconsidered route k, (d) finding a modulation format that supports requested line rate rij with minimum spectrum ⌈ r ij s z ⌉ , where Sz is spectral efficiency with which the modulation format transmits a channel, (e) finding ⌈ r ij s z ⌉ consecutive spectrum slots at M lowest wavelengths in the bit map of selected route k, and (f) determining fragmentation factor Fkm after provisioning a channel at each wavelength m on selected route k, where 1≦m≦M. Other apparatuses, systems, and methods also are disclosed.
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