SIP-Based IMS Signaling Analysis for WiMax-3G Interworking Architectures

Abstract—The third-generation partnership project (3GPP) and 3GPP2
have standardized the IP multimedia subsystem (IMS) to provide ubiquitous
and access network-independent IP-based services for next-generation networks
via merging cellular networks and the Internet. The application layer Session
Initiation Protocol (SIP), standardized by 3GPP and 3GPP2 for IMS, is responsible
for IMS session establishment, management, and transformation. The IEEE 802.16
worldwide interoperability for microwave access (WiMax) promises to provide high
data rate broadband wireless access services. In this paper, we propose two novel
interworking architectures to integrate WiMax and third-generation (3G) networks.
Moreover, we analyze the SIP-based IMS registration and session setup signaling
delay for 3G and WiMax networks with specific reference to their interworking architectures.
Finally, we explore the effects of different WiMax-3G interworking architectures on the IMS
registration and session setup signaling delay.