Journal ArticleDOI
Mid-Session Macro-Mobility in IMS-Based Networks
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TLDR
A set of solutions, implemented respectively at the session and network layers, for shortening the handover delays and/or providing session continuity in case of macro-handover in IMS-based networks are presented.Abstract:
With the introduction of terminals that support multiple access technologies, macro-mobility and roaming are becoming even more important functionalities: it is expected that mobile terminals will handover between heterogeneous networks in order to extend coverage or to get connectivity to faster and/or cheaper access technologies. Access and session control must be guaranteed when roaming across different administrative domains. The 3GPP IP multimedia subsystem (IMS) is the first platform standardized towards network-independent access and session control. However, the current IMS specifications do not allow for any change of the user's IP address during a session, which prevents seamless mid-session macro-handover. In this paper, we present and compare a set of solutions, implemented respectively at the session and network layers, for shortening the handover delays and/or providing session continuity in case of macro-handover in IMS-based networks. Since one of the main functions of IMS is quality of service (QoS) negotiation and the control of legacy interfaces to the access networks for QoS provisioning, special attention is given to the discussions of the QoS re-negotiation procedures during such handover cases.read more
Citations
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Journal ArticleDOI
An IMS-based network architecture for WiMAX-UMTS and WiMAX-WLAN interworking
TL;DR: A heterogeneous network model based on the IMS is proposed that integrates the Worldwide Interoperability for Microwave Access (WiMAX), Universal Mobile Telecommunications System (UMTS) and Wireless Local Area Network (WLAN) technologies and provides guaranteed QoS.
Journal ArticleDOI
Supporting mobility in an IMS-based P2P IPTV service: A proactive context transfer mechanism
TL;DR: A new general handover mechanism for the IP Multimedia Subsystem (IMS) is proposed, which incorporates the existing IEEE 802.21 technology in order to minimize the handover delay and is validated by comparing it against solutions derived from previous work.
Journal ArticleDOI
QoS Control for NGN: A Survey of Techniques
Changho Yun,Harry G. Perros +1 more
TL;DR: An overview of standards and a survey of recent work on quality of service (QoS) control of next generation networks (NGNs) are presented, which further strengthen existing standards by adaptively managing QoS modification according to user’s QoS changes and consistent QoS support for mobile users.
Proceedings ArticleDOI
Optimized Macro Mobility within the 3GPP IP Multimedia Subsystem
TL;DR: In this paper a solution is introduced that reduces the handover delay by sharing the registration information and call states and is quantitatively analyzed using an experimental implementation of the improved SIP mobility solution for IMS.
Journal IssueDOI
Mobile-initiated network-executed SIP-based handover in IMS over heterogeneous accesses
Wei-Kuo Chiang,Wen-Yen Chang +1 more
TL;DR: In this paper, the authors proposed a mobile-initiated network-executed (MINE) session initial protocol (SIP)-based handover mechanism to facilitate simultaneous mobility in IP multimedia subsystem over heterogeneous accesses.
References
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Journal ArticleDOI
IP multimedia services: analysis of mobile IP and SIP interactions in 3G networks
S.M. Faccin,P. Lalwaney,B. Patil +2 more
TL;DR: This article investigates the issues related to interworking between SIP and mobile IP, with a focus on IPv6 and the applicability to 3G networks being standardized in 3GPP and3GPP2.
Journal ArticleDOI
Critical issues for roaming in 3G
A. Roos,M. Hartman,S. Dutnall +2 more
TL;DR: 3GPP (the international standardization body developing the UMTS standards) has defined the IP multimedia subsystem (IMS) as an evolutionary path for basic 3G networks (developing on the already defined Release 99 and Release 4 capabilities), which creates a two-layered roaming architecture.
Proceedings ArticleDOI
Optimized Macro Mobility within the 3GPP IP Multimedia Subsystem
TL;DR: In this paper a solution is introduced that reduces the handover delay by sharing the registration information and call states and is quantitatively analyzed using an experimental implementation of the improved SIP mobility solution for IMS.
Journal ArticleDOI
Security Management in the Next Generation Wireless Networks
Yan Zhang,Masayuki Fujise +1 more
TL;DR: Several re- search challenges are identified, including security architecture with network heterogeneity, energy-security trade- offs and mobility-security interaction, which can serve as the potential guidance for further study to satisfy higher security requirement and lower introduced overhead.
Proceedings ArticleDOI
Optimized Macro Mobility within the 3GPP IP Multimedia Subsystem
TL;DR: In this paper a solution is introduced that reduces the handover delay by sharing the registration information and call states and is quantitatively analyzed using an experimental implementation of the improved SIP mobility solution for IMS.