Abstract
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, we 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 we are thus able to schedule connectivity to data centres in advance. We 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 "green-level". Our simulation results show the tradeoffs between the consumption of brown energy (i.e., energy generated by carbon-intensive means), the capability of providing required connectivity to data centres, network resource utilization, and overall operation objective.
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