The performance of an overlay Bluetooth and IEEE 802.11b (WiFi) network is considered in terms of QoS parameters, that is packet latency and throughput, in the presence of a vertical handover procedure. The objective of the overlay network is to maximize the QoS allowing the possibility for a mobile to switch from a network to the other, with the so-called vertical handover, activated on the basis of the packet error probability. The performance of the network is evaluated taking into account the mutual Bluetooth-WiFi interference and showing the influence of the main parameters of the network and of the handover procedure.
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