| ATM
traffic management (cont.) |
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| 1.
Negotiation of traffic contract before transmission |
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| Traffic
contract involves traffic
parameters and |
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| QoS
parameters |
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| 2.
Traffic control mechanisms (enforcement of contract) |
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| Connection
Admission Control (CAC): the
network |
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| decides if a
connection request can be accepted |
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| Usage
Parameter Control (UPC): the
network |
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| detects
violations of negotiated parameters and |
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| takes
appropriate action (e.g. cell discarding or |
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| cell tagging
=> CLP bit) |
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| Feedback
control (flow control of ABR
service) |
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