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The IEEE 802.11 working group currently integrates the option of mesh networking into its standard for WLANs. In addition to WLAN meshes, future wireless networks will be expanded by multiple heterogeneous access technologies such as UMTS and WiMax. These technologies differ greatly regarding medium access scheme, network capacity, QoS support, choice of data rates, and other various parameters such as power consumption and AAA aspects. Even though current paper focuses on different network access selection and handover strategies maximizing the utilization for such a heterogeneous network, it is still an open issue how to select "Inefficient" mobiles as vertical handover candidates.
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