Context-aware handoff middleware for transparent service continuity in wireless networks
Pervasive and Mobile Computing
Multiservice vertical handoff decision algorithms
EURASIP Journal on Wireless Communications and Networking
An easy way for location-based services
IMSA'07 IASTED European Conference on Proceedings of the IASTED European Conference: internet and multimedia systems and applications
An Empirical Analysis of Handoff Performance for SIP, Mobile IP, and SCTP Protocols
Wireless Personal Communications: An International Journal
Disconnection tolerance for SIP-based real-time media sessions
Proceedings of the 6th international conference on Mobile and ubiquitous multimedia
Protocols for mobility management in heterogeneous multi-hop wireless networks
Pervasive and Mobile Computing
Vertical handoffs as a radio resource management tool
Computer Communications
Analysis of UMTS radio channel access delay
Computer Communications
A Seamless Vertical Handover Approach
Wireless Systems and Mobility in Next Generation Internet
Mobility-aware management of internet connectivity in always best served wireless scenarios
Mobile Networks and Applications
A Strategy for Harmonised QoS Manipulation in Heterogeneous IMS Networks
Wireless Personal Communications: An International Journal
A mobility management scheme using SCTP-SIP for real-time services across heterogeneous networks
Proceedings of the 2009 ACM symposium on Applied Computing
CSNA '07 Proceedings of the IASTED International Conference on Communication Systems, Networks, and Applications
Enhancing interoperability in heterogeneous mobile wireless networks for disaster response
IEEE Transactions on Wireless Communications
Signaling analysis of SIP-based mobility management in IEEE 802.16 and 802.11 heterogeneous networks
CSN '07 Proceedings of the Sixth IASTED International Conference on Communication Systems and Networks
WCNC'09 Proceedings of the 2009 IEEE conference on Wireless Communications & Networking Conference
An easy way for location-based services
EurolMSA '07 Proceedings of the Third IASTED European Conference on Internet and Multimedia Systems and Applications
A new vertical handover mechanism for convergence of wired and wireless access networks
ICOIN'09 Proceedings of the 23rd international conference on Information Networking
An analytical evaluation of mobility management in integrated WLAN-UMTS networks
Computers and Electrical Engineering
A reconfigurable test platform to experiment with wireless heterogeneous networks in a laboratory
International Journal of Communication Networks and Distributed Systems
Proactive route optimization in SIP mobility support protocol
CCNC'10 Proceedings of the 7th IEEE conference on Consumer communications and networking conference
Location-based vehicular moving predictions for wireless communication
International Journal of Ad Hoc and Ubiquitous Computing
On UDP continuity over vertical handovers
Computer Networks: The International Journal of Computer and Telecommunications Networking
A solution for transparent mobility with route optimization in the IP multimedia subsystem
Computer Communications
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Future-generation wireless networks have been envisioned as the integration of various wireless access networks, including both wireless wide area networks and wireless local area networks. In such a heterogeneous network environment, seamless mobility support is the basis of providing uninterrupted wireless services to mobile users roaming between various wireless access networks. Because of transparency to lower-layer characteristics, ease of deployment, and greater scalability, the application-layer-based session initiation protocol has been considered the right candidate for handling mobility in heterogeneous wireless networks. However, SIP entails application-layer transport and processing of messages, which may introduce considerable delay. As a case study of the performance of mobility management protocols in the heterogeneous wireless networks, we analyze the delay associated with vertical handoff using SIP in the WLAN-UMTS internetwork. Analytical results show that WLAN-to-UMTS handoff incurs unacceptable delay for supporting real-time multimedia services, and is mainly due to transmission of SIP signaling messages over erroneous and bandwidth-limited wireless links. On the other hand, UMTS-to-WLAN handoff experiences much less delay, mainly contributed by the processing delay of signaling messages at the WLAN gateways and servers. While the former case requires the deployment of soft handoff techniques to reduce the delay, faster servers and more efficient host configuration mechanisms can do the job in the latter case.