VirtualClock mechanism

• Derived from a Time Division Multiplexing (TDM) system.

• Allocates guaranteed throughput to traffic flows according to their expected packet arrival rates.

• Provides firewalls between traffic flows.

• Statistically allocates bandwidth to traffic flows.

• The algorithm performs two functions:

  • Data forwarding: allocates queues to traffic flows and decides service order of the packets.
  • Flow monitoring: the flow’s conformance is checked and, if needed, a control message is sent to the source.

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