Service interaction management in next generation networks service control overlay (IMS)

In the Next Generation Networks the control plane and the service plane are entirely separated. This separation ensures the autonomy of each plane and enables their independent development and deployment. The specification of the IP Multimedia Subsystem (IMS), as a unique service control overlay over the heterogeneous networks, eases the interaction between these planes. However, this interaction becomes challenging when multiple services are invoked during a session. The goal of this thesis is to provide IMS, with mechanisms to manage the interactions between services. We addressed two problems in this field: the negative interactions that are due to the conflicts between services and the positive interactions that enable the composition of services. The service conflicts occur as services invoked during an IP session behave correctly when processed separately from each other, but not when running together. We defined a SIP-based algorithm and the associated mechanisms to enhance IMS service invocation. This algorithm is the core of the Service Broker, a new functional entity in charge of managing the service conflicts. We validated our proposal through a performance evaluation and prototyped the Service Broker on an open source IMS platform. By means of service composition all kinds of service inter-working scenarios, independently of the underlying control functionalities, can be achieved. We defined a SIP-based service composition management algorithm, over the Service Capability Interaction Manager (SCIM) of IMS. This algorithm enables the interoperability and cooperation between different services and allows enriching and personalizing the services based on the user needs and preferences. We presented the application of our proposition in different use cases and validated it through the analytical studies.EVRY-INT (912282302) / SudocPARIS-BIUSJ-Mathématiques rech (751052111) / SudocSudocFranceF