Lightpath Scheduling and Routing for Green Data Centres
Optical networking technologies enable data centres to be located near sources of green energy (i.e., renewable energy). Since, some green energy sources are intermittent and are not always available, the authors need to dynamically connect distribution networks to the green energy powered data centres. On the other hand, the availability of green energy is reasonably predictable, and they are thus able to schedule connectivity to data centres in advance. They propose a WDM network planning model, which allows lightpaths to slide within their desired timing windows with no penalty on the optimization objective, and to slide beyond their desired timing windows with a deteriorating "Greenlevel".