Application-layer mobility using SIP
ACM SIGMOBILE Mobile Computing and Communications Review
Mobility management for VoIP service: Mobile IP vs. SIP
IEEE Wireless Communications
An IP-based QoS architecture for 4G operator scenarios
IEEE Wireless Communications
Mobility support in wireless Internet
IEEE Wireless Communications
A survey of mobility management in next-generation all-IP-based wireless systems
IEEE Wireless Communications
A new model for service and application convergence in B3G/4G networks
IEEE Wireless Communications
Analysis of SIP-based mobility management in 4G wireless networks
Computer Communications
Challenges in the migration to 4G mobile systems
IEEE Communications Magazine
Seamless SIP-based mobility for multimedia applications
IEEE Network: The Magazine of Global Internetworking
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It is commonly held that next generation mobile systems will be developed on the Internet in combination with diverse access technologies, as the future network architecture will be the coming together of various overlapping wireless access networks. Integrating various wireless networks in future heterogeneous networking environments poses many difficulties, the most critical challenge of which is efficient support for seamless mobility. SIP is a promising nominee for managing mobility in heterogeneous networks as it provides mobility within the application layer and the characteristics of the lower layer protocols are invisible to it. However, the performance of SIP-based mobility management is downgraded, resulting from its adoption of TCP/UDP for signaling and its strict separation between the lower layers and the application layer of the protocol stack. In this paper, a SIP-based cross-layer design for fast handoffs is proposed to shorten the service interruption time when a mobile node crosses the overlapped area of a WLAN/3G cellular system. As will be shown by the simulation results, the SIP-based solution proposed in this paper effectively lessens the handoff delays caused by either the horizontal handoff or vertical handoff in future all-IP heterogeneous wireless networks.