Policy-Enabled Handoffs Across Heterogeneous Wireless Networks
WMCSA '99 Proceedings of the Second IEEE Workshop on Mobile Computer Systems and Applications
An Adaptive Scheme for Vertical Handoff in Wireless Overlay Networks
ICPADS '04 Proceedings of the Parallel and Distributed Systems, Tenth International Conference
Signal threshold adaptation for vertical handoff in heterogeneous wireless networks
Mobile Networks and Applications
An Intelligent Handoff System for Wireless Cellular Networks Using Fuzzy Logic and Random Walk Model
CISIS '08 Proceedings of the 2008 International Conference on Complex, Intelligent and Software Intensive Systems
A new 4G architecture providing multimode terminals always best connected services
IEEE Wireless Communications
User mobility modeling and characterization of mobility patterns
IEEE Journal on Selected Areas in Communications
Call performance for a PCS network
IEEE Journal on Selected Areas in Communications
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Vertical handoff decision is an important process in heterogeneous systems. In order to find an appropriate time to trigger a handoff, deciding a stability period before performing the handoff has been studied formerly. In this paper, we introduce the definition of the residence time of a handoff zone (HZ) into the stability period decision method. Then two algorithms, Stability Period Decision Scheme with HZ Residence Time (SPDRT) and Stability Period Decision Scheme Based on Fuzzy Logic (SPDFL), are proposed to adjust the stability period dynamically. Moreover, we apply the two schemes to solve the handoff call queuing problem. Simulation results show that the proposed methods can decrease handoff call dropping rate effectively and adjust the stability period intelligently and sensibly.