engleski

Extending QoS support in the IP multimedia subsystem: Mobility-aware session reconfiguration

This paper presents an approach to controlling service continuity and quality of service (QoS) in the 3rd Generation Partnership Project (3GPP) IP multimedia subsystem (IMS). The approach extends existing support to manage QoS by dynamically producing multimedia session configurations with respect to different mobility types, which is referred to as mobility-aware session reconfiguration. We first give a state-of-the-art overview regarding IMS support for service continuity and QoS management. Then, we propose to enhance QoS support in IMS by introducing a Session Initiation Protocol (SIP) application server that is responsible for (1) generating QoS specifications which conform to the mobility-induced constraints and (2) reconfiguration decision-making. Moreover, we describe several SIP signaling procedures which enable the session reconfiguration, and demonstrate the application of our approach in an IMS laboratory prototype, which also serves for a performance evaluation of the solution.

IP Multimedia Subsystem (IMS) ; Quality of Service (QoS) support ; mobility ; session reconfiguration ; case study ; performance evaluation

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