Handling feature interactions for multi-party services in 3GPP IP multimedia subsystem

In this paper, an approach with extended cocoons to detect and resolve the feature interaction induced by the centralized multi-party service is proposed, hereinafter referred to as the ECOMPS. The ECOMPS is built based on the approach presented in (Kolberg and Magill, 2007) which manages the feature interaction between call control services within a single session; therefore, the good characters are inherited. The ECOMPS introduces a cocoon surrounding the centralized multi-party service, called COMPS, to modify the original SIP request message to include the information about participants in the multi-party service; in addition, the cocoon for call control services in (Kolberg and Magill) is extended, called COCCS, to describe the servicepsilas execution on the modified request message. Moreover, the ECOMPS can be applied to the service capability interaction manager (SCIM) in 3GPP IP multimedia subsystem (IMS) to detect the feature interaction between SIP application servers where call control services are deployed on, even with the centralized multi-party service involved in the communication. The ECOMPS is also illustrated by taking the multi-party conferencing service as an example. The feature interaction caused by the centralized multi-party service can be detected and resolved with the ECOMPS.