A New Protocol for Bandwidth Regulation ofReal -

A novel bandwidth regulation mechanism is proposed which improves the ability of a packet-switching network to cope with multiple real-time and non-real-time traac classes. The mechanism achieves regulation of link bandwidth at two levels. At the rst level, band-width is dynamically regulated between diierent traac classes. The concept ofìnter-class regulation' is introduced which enforces that the bandwidth left unused by a traac class is divided among traac classes with high bandwidth demands. At the second level, bandwidth regulation is enforced on end-to-end traac streams, so-called ows, such that ows from the same class with identical routes have the same throughput constraints. This concept is referred to asìntra-class regulation'. A simple distributed protocol is presented that achieves intra-class and inter-class regulation in a general inter-network. The eeectiveness of the protocol is demonstrated by simulation experiments.