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Analysis of interworking architectures for IP multimedia subsystem

University of British Columbia

The future fourth generation wireless heterogeneous networks aim to integrate various wireless access technologies and to support the IMS (IP multimedia subsystem) sessions. In the first part of this thesis, we propose the Loosely Coupled Satellite-Cellular- WiMax-WLAN (LCSCW2) and the Tightly Coupled Satellite-Cellular-WiMax-WLAN (TCSCW2) interworking architectures. The LCSCW2 and TCSCW2 architectures use the loosely coupling and tightly coupling approach respectively and both of them integrate the satellite networks, 3rd generation (3G) wireless networks, worldwide interoperability for microwave access (WiMax), and wireless local area networks (WLANs). They can support IMS sessions and provide global coverage. The LCSCW2 architecture facilitates independent deployment and traffic engineering of various access networks. The TC-SCW2 aims to guarantee quality of service (QoS). We also propose an analytical model to determine the associate cost for the signaling and data traffic for inter-system communication in the LCSCW2 and TCSCW2 architectures. The cost analysis includes the transmission, processing, and queueing costs at various entities. Numerical results are presented for different arrival rates and session lengths. In the second part of this thesis, the signaling flows for IMS registration, IMS session establishment and IMS session re-establishment procedure after undergoing a vertical handoff in a 4 G environment are analyzed. Signaling delays are calculated for IMS signaling taking into account transmission, processing and queueing delays at network entities. The proposed analysis of the IMS signaling flows is independent of a particular access network technology and interworking architecture and can be applied to any of the access network technology and 4G interworking architecture.

Text

2011-03-07

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http://hdl.handle.net/2429/32112

Electrical and Computer Engineering

University of British Columbia

Graduate