| 摘要 |
One embodiment of the present invention provides a system for routing signals through an optical network, wherein the optical network includes a plurality of optical cross-connects coupled together by a plurality of optical fiber links. Note that each of the optical cross-connects includes a plurality of non-blocking switches, and each optical fiber link can carry signals on a plurality of wavelengths. Upon receiving a request to establish a path, the system identifies a plurality of paths between the source and the destination through the optical network. Each switch in an optical cross-connect is associated with one or more wavegroups (wherein each wavegroup includes signals from one or more wavelengths). Note that each path through the optical network is comprised of wavelength/fiber links that belong to the same wavegroup, and that wavelength/fiber links that belong to the same wavegroup are routed through a non-blocking switch that is associated with the wavegroup. Next, the system calculates a cost for each of the paths based upon a cost function, and selects a path based upon the calculated costs.
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