Design and analysis of a fault tolerant hybrid mobile scheme
Information Sciences: an International Journal
Proceedings of the 4th ACM symposium on QoS and security for wireless and mobile networks
Mobility-aware management of internet connectivity in always best served wireless scenarios
Mobile Networks and Applications
An adaptive multi-criteria vertical handover framework for heterogeneous networks
Mobility '08 Proceedings of the International Conference on Mobile Technology, Applications, and Systems
New vertical handoff algorithm based on hysteretic level
ICAIT '08 Proceedings of the 2008 International Conference on Advanced Infocomm Technology
Computer Networks: The International Journal of Computer and Telecommunications Networking
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Abstract-Due to the complementary nature of radio and optical wireless (OW) both in capacity and coverage, the combined use of both for data transmission could have advantages over a single media. However, big technical challenges for vertical-handover (VHO) strategy arise for such an integrated system. According to different interruption types and traffic modes, two basic VHO schemes can be applied: immediate VHO (I-VHO) and dwell VHO (D-VHO). This paper proposes a novel fuzzy-logic (FL)-based decision-making algorithm for VHO, which is capable of combining the merits of both schemes to achieve excellent handover in terms of packet transfer delay for all the cases considered here. The strength of FL in handling uncertain and conflicting decision metrics is exploited. Since excessive transfer delay results in disrupted connection and corrupted service, the proposed FL-based VHO decision-making algorithm has the potential to provide a better quality of service (QoS) to users in future wireless broadband communications.