Interworking Components for the end-to-end QoS into IMS-based architecture mono provider

The users wish to communicate through collections of networks using different protocols, rendering service mapping from one network to another with the similar QoS is a complex issue thereby. The heterogeneous networks are collections of communication platforms using different protocols. This heterogeneity implies the need to offer many different services on the market within short time. With the emergence of IMS and the introduction of IP and SIP protocols as a means for achieving network homogeneity, service interoperability has become primordial. Regarding this issue, the present paper proposes a solution for homogenizing IMS networks with respect to the utilized QoS settings and charging policy. Therefore, we suggest solutions to both problems of mapping QoS on heterogeneous networks and implementing service level charging independently of the underlying network. Particularly with regard to these problems, our method presents a mechanism which can be deployed in heterogeneous networks to preserve the original QoS values of the user session and thus eliminate the cumulative effect of QoS rounding across the entire communication path. And it is feasible via the “Interworking QoS Management Subnetwork” while adding the new interworking management components, namely: SICs, DIC and HSS+.