Qualitative properties of the Erlang blocking model with heterogeneous user requirements
Résumé
We study the effect of increasing the model parameters (e.g. arrival rates and traffic intensities) in the Erlang blocking model with heterogenous user requirements. First-order (monotonicity) and second-order (concavity) qualitative results are obtained for the performance measures of interest (loss probabilities, throughput, channel occupancy, etc.) both in the transient and in the steady-state case. Stochastic and likelihood-ratio orderings together with coupling techniques are used to indicate the effect of modifying the model parameters.