Measurement-based usage charges in communications networks

We study usage-sensitive charging schemes for broadband communications networks. We argue that a connection's ‘effective bandwidth’ is a good proxy for the quantity of network resource that the connection consumes and can be the basis for a usage charge. The determination of effective bandwith can be problematic, however, since it involves the moment-generating function of the cell arrival process, which may be difficult to model or measure. This article describes methods of computing usage charges from simple measurements and relating these to bounds on the effective bandwidth. Thus we show that charging for usage on the basis of effective bandwidths can be approximated well by charges based on simple measurements.