Depending upon the state of congestion in the network, the source is required to control its rate. The users are allowed to declare a minimum cell rate, which is guaranteed to the connection by the network. The following is the technical parameters to be associated with a connection. These terms are outlined in Table 2. It includes propagation delays, queuing delays at various intermediate switches, and service times at queuing points.
High variation implies larger buffering for delay-sensitive traffic such as voice and video.
The maximum cell rate at which the user will transmit. PCR is the inverse of the minimum cell inter-arrival time. This is the average rate, as measured over a long interval, in the order of the connection lifetime. This parameter determines the maximum burst that can be sent at the peak rate. This is the bucket-size parameter for the enforcement algorithm that is used to control the traffic entering the network.