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Pre Allocation Approach
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Constrained link bandwidth are resources
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Each link is constrained by a quality entropy
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Bandwidth Broker controls all resources
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BB allocates resources to Ingress Routers in batch order mode
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Demand forecast in Ingress Router
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collects traffic demand statistics
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predicts the traffic demands of future time periods using statistical data
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The length of time periods depends on the stability of the demanded traffic
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The length of time periods is either fixed or flexible
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needs to compensate the efficiency degradation due to prediction errors
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