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