Location assisted fast vertical handover for UMTS/WLAN overlay networks

Authors:
Tom Van Leeuwen;Ingrid Moerman;Piet Demeester
Affiliations:
Ghent University - IBBT - IMEC vzw, Department of Information Technology (INTEC), Gaston Crommenlaan 8 bus 201, B-9050 Gent, Belgium;Ghent University - IBBT - IMEC vzw, Department of Information Technology (INTEC), Gaston Crommenlaan 8 bus 201, B-9050 Gent, Belgium;Ghent University - IBBT - IMEC vzw, Department of Information Technology (INTEC), Gaston Crommenlaan 8 bus 201, B-9050 Gent, Belgium
Venue:
Computer Communications
Year:
2006

Citing 3
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Abstract

UMTS/WLAN integration offers considerable benefits for the mobile users as well as for the mobile network. As soon as coverage is available, a mobile user should switch seamlessly from the ubiquitous low bandwidth UMTS network to a high bandwidth WLAN. This will improve his quality of service, but also increases capacity in the cellular network. To be able to change between radio access technologies, an inter-RAT handover protocol is needed. If this handover protocol is not fast enough, the vehicular user will penetrate deep into the cell before packets get delivered to the right access point, underutilizing the available bandwidth with a lower overall performance as a result. In this paper, we introduce a new vertical handover protocol which uses location information from the vehicle to predict where and when the handover should occur, thus optimizing user throughput and network performance. We consider its deployment on three UMTS/WLAN integration scenarios.