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B-ISDN architectural evolution towards the integration with intelligent network

B-ISDN control architectures and protocols have been defined by standardization bodies to provide switched services over the emerging ATM transport networks. The first releases of such architectures provide almost the same services as those provided by the narrowband network but with increased bandwidth. In order to fully exploit the transport capabilities offered by ATM a versatile control architecture, that could support rapid integration of new services into the existing control infrastructure, is desired; the method of providing such an evolution is leading to an integration of IN concepts into the B-ISDN architecture. This paper proposes a possible smooth evolution starting from the control architecture under standardization by the ITU-T. Some relevant aspects of call modeling, such as how to handle the creation and to keep track of the call control associations between the parties, are addressed.