Abstract: A connection admission control (CAC) technique for a telecommunications node approximates probability of loss using a log moment generating function and its two partial derivatives of workload on a queue over a time interval. The approximation uses four state variables, which depend on the log moment generating function and its two partial derivatives. The four state variables are: (1) Linear term in approximation to log loss ratio at a working point; (2) the argument of logarithmic term in approximation to log loss ratio at the working point; (3) a buffer limit used at the working point; and (4) a multiplier of imaginary traffic used at the working point. Advantageously, these state variables vary linearly with the traffic, so a new connection can simply add its contributions to them.

Abstract: An arrangement and a method control the flow of signals including a number of information packets in a communications network, e.g. an ATM-network. The arrangement includes a device for separating the signals in the first traffic signals and second traffic signals. The first traffic signals are signals that have a higher proportion of guaranteed resources, i.e. bandwidth, than the second traffic signals. The first traffic signals are also given a lower priority than the second traffic signals. The first and second traffic signals are handled separately.