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With the development of various heterogeneous wireless technologies, which are for different purposes, the integration of these networks will provide good service, connectivity and high date rates to users. In this paper, the authors consider the integration of WLAN and 3G networks. They evaluate performance of two Vertical HandOff (VHO) algorithms for an integrated 3G and WLAN network. The number of handoffs and decision delay are estimated as the MT (Mobile Terminal) moves from the centre of 3G network towards the AP of WLAN.
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