Vertical handoffs in wireless overlay networks
Mobile Networks and Applications - Special issue: mobile networking in the Internet
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In this paper, a middleware architecture allowing the transparent mobility among two different wireless networks is presented. The proposed scheme is basically based on adaptively maintaining the access to the communication channel for a mobile client enabled with GPRS (General Packet Radio Service) and Bluetooth interfaces. In particular, both the GPRS and the Bluetooth connections are automatically established by means of an RFID tag. To validate this architecture, a preliminary field trial have been set up pointing out the effectiveness of the proposed approach in supporting seamless handover procedures within a heterogeneous network.