Leaky bucket mechanism (cont.)

• Dual leaky bucket:

  • used to police VBR sources.
  • build from two concatenated single buckets.
  • the leaking rate of the first and the second bucket are set to the negotiated PCR (Peak Cell Rate) and MCR (Mean Cell Rate) of the source, respectively.
  • the first bucket’s size is a function of PCR and delay jitter.
  • the second bucket’s size is set to the maximum burst accepted by the network.

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