Mobility

Performance of Handover for Multiple Users in Heterogeneous Wireless Networks

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Executive Summary

Handover solutions ensuring seamless connectivity and high user-perceived quality of service for a given application context are essential for multi-mode wireless devices in heterogeneous wireless network environments. A critical handover step, the network selection decision, is automatically and transparently made in the user's terminal, aiming to keep the user "Always best connected". The authors propose Quantified Adaptive Delay Selection (QADS), a novel multi-user-aware handover algorithm that maintains high quality of service levels for mobile users performing handover in heterogeneous wireless network environments. QADS is a user-centric solution building on the IEEE 802.21 Media Independent Handover standard.

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