Analytical modeling of multi-service systems with multi-service sources

The paper presents a new analytical model for performance evaluation of multi-service communication systems. The paper considers for the first time multi-service systems in which each single traffic source can generate calls of different traffic classes, i.e. the multi-service systems with multi-service sources. To date only the models assuming that a single source of given class generates always only calls of this class, i.e. the multi-service systems with single-service sources, have been considered in teletraffic literature. The proposed algorithm makes it possible to determine occupancy distribution as well as blocking and loss probability for calls of particular traffic classes. In order to assure completeness of considerations the systems with both finite and infinite traffic sources are considered. The results of analytical modeling of the systems with multi-service sources are compared with simulation data. The possible application of the proposed model is presented in the context of an exemplary cellular system with WCDMA (Wideband Code Division Multiple Access) radio interface.