Application layer signaling for proactive handoff management in all-IP wireless networks
ICC'09 Proceedings of the 2009 IEEE international conference on Communications
IMS-compliant management of vertical handoffs for mobile multimedia session continuity
IEEE Communications Magazine
A reconfigurable test platform to experiment with wireless heterogeneous networks in a laboratory
International Journal of Communication Networks and Distributed Systems
Supporting mobility in an IMS-based P2P IPTV service: A proactive context transfer mechanism
Computer Communications
An IMS-based network architecture for WiMAX-UMTS and WiMAX-WLAN interworking
Computer Communications
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Wireless service providers strive to preserve the quality of service and user experience for mobile users. Several standards bodies are defining architectures that can be used as a platform to provide secure and seamless services to these mobile users. These architectures aim to provide several required functions such as signaling, configuration, security association, encryption, and billing. However, the placement of several functional components and their interaction at several layers contributes to the operational complexity and thus affects the optimal results. Testbed realization of any standardized architecture can help investigate the underlying networking issues. In this article, we describe a mobility test bed implementation based on one of the architecture alternatives of 3GPP2, where the outbound signaling servers are distributed around the edges of the network. We experiment with three different hand-off techniques and analyze the associated experimental results. Analysis of these experimental results and experiences obtained from the testbed implementation can be helpful to any service provider that plans to deploy a version of the MMD (multimedia domain) architecture with distributed signaling servers.