Research On Feature Interaction Manager For IMS

IP Multimedia Subsystem (IMS) is a main solution of Next Generation Network (NGN)which was first proposed in3GPP R5version. IMS offers a broad development space to thethird-party services, for its exoteric service ability. On the other hand, Feature Interaction (FI)issues will also emerge more frequently and complexly for the increase of the number andtypes of IMS services. If FI problem cannot be properly solved, it will take effect on thedevelopment of IMS services.The purpose of this paper is to design a Feature Interaction Manager (FIM) for IMS thatcan resolve the management problem of IMS.Firstly, the paper elaborates the IMS architecture summarily and especially indicates theIMS triggering mechanism based on initial Filtering Criteria. By analyzing the inadequaciesof the triggering mechanism, we indicate the cause that FI occurs. Then the paper makes adetailed description of the design of the internal modules in FIM, and creatively formulates aset of IMS FI detection rules for three categories of IMS FI. Then, describes the overallarchitecture of FIM based on Service Broker reference model and explains the workflow ofFIM. Finally, we build a simulated environment with Open Source IMS Core and developseveral IMS services. And then simulate the three kinds of FI detection algorithm on it.This paper implements the simulation of FI detection algorithm to prove the algorithmreasonable and feasible. In addition, Service Capability Interaction Manager (SCIM) is onlydefined functionally by3GPP but no specific achievement for standardization. This paper canprovide a reference for the standardization of IMS SCIM and Service Broker.