| Resource Reallocation | Central Pool | Overbook | Hybrid |
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Resource Reallocation Approach (資源重分配法)
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revoke resources from the Ingress Routers that are over-estimated and
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reallocate to the Ingress Routers that are under-estimated
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Central Pool Approach (中央保留資源法)
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Reserve part of resources in Bandwidth Broker for on-demand reservation
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Overbook Approach (超額分配法)
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allocate resources beyond existing capacity
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resources reallocation is done implicitly
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Issue: resource utilization vs. risk of over flow penalty
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Hybrid Approach (混合分配法)
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Overbook + Reallocation (超額分配法搭配資源重分配)
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Explicit resource reallocation may encourage high risk overbook
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Central Pool + Reallocation (中央保留資源法搭配資源重分配)
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reallocate unused resources before the resources in central pool
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resource reallocation can extend the life of central pool
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