Recent advances in multimedia networking
Multimedia Tools and Applications
Future Multimedia System: SIP or the Advanced Multimedia System
International Journal of Ambient Computing and Intelligence
Mitigation of redundant handovers to femtocells by estimation of throughput gain
Mobile Information Systems
Markov-based vertical handoff decision algorithms in heterogeneous wireless networks
Computers and Electrical Engineering
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Self-adaptive management and quality adaptation of multimedia services are open challenges in the heterogeneous wireless Internet, where different wireless access points potentially enable anywhere anytime Internet connectivity. One of the most challenging issues is to guarantee streaming continuity with maximum quality, despite possible handoffs at multimedia provisioning time. To enable handoff management to self-adapt to specific application requirements with minimum resource consumption, this paper offers three main contributions. First, it proposes a simple way to specify handoff-related service-level objectives that are focused on quality metrics and tolerable delay. Second, it presents how to automatically derive from these objectives a set of parameters to guide system-level configuration about handoff strategies and dynamic buffer tuning. Third, it describes the design and implementation of a novel handoff management infrastructure for maximizing streaming quality while minimizing resource consumption. Our infrastructure exploits i) experimentally evaluated tuning diagrams for resource management and ii) handoff prediction/awareness. The reported results show the effectiveness of our approach, which permits to achieve the desired quality-delay tradeoff in common Internet deployment environments, even in presence of vertical handoffs.