Call-Level Performance Modelling of Elastic and Adaptive Service-Classes

We propose a new teletrafflc model for the calculation of link occupancy distribution and determine the call blocking probabilities and link utilization in a single-link multi-rate loss system. We consider K different service-classes, either of elastic or of adaptive type, that compete for the available link bandwidth under the complete sharing policy. Calls arrive to the link with several contingency bandwidth requirements that depend on thresholds, which indicate the total link occupied bandwidth. It is possible for a call, while in service with a certain bandwidth to reduce it, in order for new calls to be accepted in the link. The accuracy of the new model is verified by simulation results. Moreover, the proposed model performs much better than the existing model for elastic and adaptive traffic.