A framework for admission management of dynamic conferencing calls under a multi-point ATM architecture

The paper develops a framework for representing dynamic calls (i.e. calls with a variable number of clients) and the associated link-level connection (VCL) variability in an ATM multi-point architecture. A generic parameter vector is formulated for the dynamic call object. Under the selected network architecture, a tag-update algorithm isolates the impact of this global call object on the VCL layer. Each carried client is assumed to be active (transmit/receive) or inactive (receive). A simple true-state model captures the dependence of client status on the status of other clients in the same call. The activity (or active VCL) layer is assumed to be constrained (through a probabilistic threshold) by the lower ATM layer. We present a distributed call admission scheme that ensures this threshold is not exceeded on any directed link of the admitted call multi-cast tree