Service Invocation Issues within the IP Multimedia Subsystem
ICNS '07 Proceedings of the Third International Conference on Networking and Services
A call-state-based service triggering algorithm for IMS network
International Journal of Communication Systems
An analytical evaluation of mobility management in integrated WLAN-UMTS networks
Computers and Electrical Engineering
Application creation for IMS systems through macro-enablers and Web 2.0 technologies
Bell Labs Technical Journal - General Papers
A group based service triggering algorithm for IMS network
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
Evaluating extensions to IMS session setup for multicast-based many-to-many services
Computer Networks: The International Journal of Computer and Telecommunications Networking
Next generation network service architecture in the IP multimedia subsystem
AINTEC'06 Proceedings of the Second Asian international conference on Technologies for Advanced Heterogeneous Networks
Service delivery platforms in practice [IP Multimedia Systems (IMS) Infrastructure and Services]
IEEE Communications Magazine
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IP Multimedia Subsystem (IMS) is considered to provide multimedia services to users through an IP-based control plane. The current IMS service invocation mechanism, however, requires the Serving-Call Session Control Function (S-CSCF) invokes each Application Server (AS) sequentially to perform service subscription profile, which results in the heavy load of the S-CSCF and the long session set-up delay. To solve this issue, this paper proposes a linear chained service invocation mechanism to invoke each AS consecutively. By checking all the initial Filter Criteria (iFC) one-time and adding the addresses of all involved ASs to the ''Route'' header, this new approach enables multiple services to be invoked as a linear chain during a session. We model the service invocation mechanisms through Jackson networks, which are validated through simulations. The analytic results verify that the linear chained service invocation mechanism can effectively reduce session set-up delay of the service layer and decrease the load level of the S-CSCF.