Performance Analysis and Optimization of Handoff Algorithms in Heterogeneous Wireless Networks
IEEE Transactions on Mobile Computing
IEEE Wireless Communications
Movement-Aware Vertical Handoff of WLAN and Mobile WiMAX for Seamless Ubiquitous Access
IEEE Transactions on Consumer Electronics
Bandwidth estimation: metrics, measurement techniques, and tools
IEEE Network: The Magazine of Global Internetworking
Context-awareness handoff planning in heterogeneous wireless networks
UIC'10 Proceedings of the 7th international conference on Ubiquitous intelligence and computing
Convergence architectures to achieve QoS for WiMAX and WiFi with high mobility support
International Journal of Wireless and Mobile Computing
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In this paper, we investigate the issue of vertical handoffs in heterogeneous wireless networks. A QoS-based vertical handoff scheme for WLAN and WiMAX interworking networks is proposed with aim to provide always best service to users. We also present a simple, yet efficient method to estimate the available bandwidth in WLAN and WiMAX networks to evaluate the real-time status of the overlay networks and make a handoff decision based on the information. By our proposal, a handoff process will not only be triggered by unaccepted signal strength but also by unsatisfied QoS parameters. Simulation results show that the proposed scheme can keep stations always be best connected with their QoS requirements met.