Method for measurement-based connection admission control (mbac) in a packet data network

Abstract

A method for measurement-based connection admission control in a packet data network where traffic flow of arriving data packets is forwarded via a switch with a delay depending on the priority of a queue associated to the data packets of a respective connection and the amount of prevailing traffic. The method comprises providing an estimated maximal rate envelope (Rk) of the traffic flow based on traffic measurements; approximating the envelope to a piecewise linear traffic constraint curve (A(Ik)); modifying the piecewise linear traffic constraint curve such that the curve assumes a concave shape; and checking whether a predetermined delay bound for the priority queue of a new connection requesting to be admitted, and the delay bounds for all queues having a lower priority than the requesting new one, are not violated, and granting the requested new connection, if the predetermined delay bounds are not violated.