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Wireless Communications and Mobile Computing
Volume 2017, Article ID 8789513, 15 pages
Research Article

Handover Based IMS Registration Scheme for Next Generation Mobile Networks

1Department of Computer Science and Software Engineering, International Islamic University, Islamabad 44000, Pakistan
2Department of Computer Science, National University of Modern Languages, Islamabad 44000, Pakistan
3College of Computer and Information Sciences, King Saud University, Riyadh, Saudi Arabia
4Department of Computer Science, Electrical and Space Engineering, Luleå University of Technology, 971 87 Luleå, Sweden

Correspondence should be addressed to Shireen Tahira; moc.liamg@183arihatneerihs

Received 27 May 2017; Revised 2 August 2017; Accepted 7 August 2017; Published 27 September 2017

Academic Editor: Syed Hassan Ahmed

Copyright © 2017 Shireen Tahira et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Next generation mobile networks aim to provide faster speed and more capacity along with energy efficiency to support video streaming and massive data sharing in social and communication networks. In these networks, user equipment has to register with IP Multimedia Subsystem (IMS) which promises quality of service to the mobile users that frequently move across different access networks. After each handover caused due to mobility, IMS provides IPSec Security Association establishment and authentication phases. The main issue is that unnecessary reregistration after every handover results in latency and communication overhead. To tackle these issues, this paper presents a lightweight Fast IMS Mobility (FIM) registration scheme that avoids unnecessary conventional registration phases such as security associations, authentication, and authorization. FIM maintains a flag to avoid deregistration and sends a subsequent message to provide necessary parameters to IMS servers after mobility. It also handles the change of IP address for user equipment and transferring the security associations from old to new servers. We have validated the performance of FIM by developing a testbed consisting of IMS servers and user equipment. The experimental results demonstrate the performance supremacy of FIM. It reduces media disruption time, number of messages, and packet loss up to 67%, 100%, and 61%, respectively, as compared to preliminaries.