Telecommunication Systems 12 (1999) 193–210 193 Traffic management for connectionless services over ATM ∗ J.L. Rougier a , Daniel Kofman a and Annie Gravey b a Ecole Nationale Sup´ erieure des T´ el´ ecommunications, 46 Rue Barrault, 75013 Paris, France E-mail: {rougier;kofman}@res.enst.fr b France Telecom – CNET, Technopole Anticipa, 2 avenue Pierre Marzin, 22307 Lannion, France E-mail: annie.gravey@cnet.francetelecom.fr This paper is concerned with the transport of connectionless traffic over ATM networks. Several architectures have been defined and standardized for this purpose, like LANE, CBDS, Classical IP or MPOA. However traffic management for resources optimization of these architectures remains mostly an open issue. One of the key problem there is to control – and dimension – the capacity of the required ATM virtual circuits. In [19,21], dynamic capacity allocation schemes have been defined for this purpose. They have shown great promise through simulation and analytical studies. In this paper, we analyze the behavior of a multiplexer with such dynamic capacity allocation schemes when fed by several bursty flows. EATA properties [5,18] are used to compute the loss probability seen by each individual multiplexed stream, extending the analytical analysis of [9]. The study gives insight into the usefulness of these schemes and highlights several interesting properties: namely, the reduction of inter-dependency between multiplexed flows and the reduction of the average queue occupancy. Such properties allow a better multiplexing gain. The particular case of dynamic allocation schemes for TCP/IP is then discussed. 1. Introduction ATM technology is being deployed widely throughout the world, in public and private networks. It shows great promise in its capability to allow an efficient inte- gration of services. At the same time, Internet traffic is exploding, and novel high- bandwidth technologies are needed to support it. It has been agreed that ATM appears as an excellent candidate for this, both at the local and wide area domains. The trans- port of IP traffic over ATM networks has thus become an intensive field of investigation and development. Transporting IP traffic (and more generally, any connectionless traffic) over ATM networks requires the definition of specific functionalities, mainly because of the connection-oriented paradigm of ATM. Various architectures have been defined by the ITU, IETF and ATM Forum. They can be classified into two categories, the “Hop-by-Hop” and “One-Hop” models, as it will be explained below. * This work is part of the France Telecom–CNET/ENST project PE96-7672.  J.C. Baltzer AG, Science Publishers