SERVICE INTERACTION RESOLUTION BY SERVICE NODE INSTALLED OUT OF THE NETWORK

Service interaction resolution is an important study subject to realiz e a network supporting various advanced communication services. This p aper proposes service interaction resolution by service node connected with the communication network via the user-network interface. By exe cuting various advanced services on the service node, service interact ions can be efficiently resolved without adding new functions to the e xisting network. In other words, the service node enables a unified ex ecution control of all the services including those for the originatin g side and those for the terminating side. This prevents the signallin g system and the signalling procedure from being expanded to resolve s ervice interactions. Moreover, the interactions between the services i nitiated at the conversation active state can be resolved by the servi ce node equipped with function of receiving plural types of in-band si gnals. This avoids functional expansion of the switching systems in th e network. In this paper, feasibility of the proposed resolution schem e is proved by showing a structure of the service node and a detailed procedure to resolve interactions on that service node. In the propose d service node, the application part is divided into basic call proces sing part and service processing part, and the basic call processing p art is represented by three kinds of basic call processing state model s. The proposed method for resolving service interactions can control services execution with high flexibility by using feature interaction table.