TCP Throughput Optimized Handover Decisions

Conference: European Wireless 2005 - 11th European Wireless Conference 2005 - Next Generation wireless and Mobile Communications and Services
04/10/2006 - 04/13/2005 at Nicosia, Cyprus

Proceedings: European Wireless 2005

Pages: 7Language: englishTyp: PDF

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Burmeister, Carsten; Killat, Ulrich (Hamburg University of Technology, Denickestr. 17, BA IIa, 21073 Hamburg, Germany)
Bachmann, Jens (Panasonic R&D Center Germany GmbH, Monzastrasse 4c, 63225 Langen, Germany)

We consider a mobile user in an environment characterized by a cellular network with whole coverage and isolated Wireless-LAN (WLAN) access points. Downloading a file from the Internet, the user is often confronted with the need to come to a decision whether to handover from the cellular system to a WLAN access point. For off-the-shelf Mobile-IP configurations we show that the overall performance of a handover to WLAN and back depends on two main parameters only. Estimating these parameters at entering the WLAN coverage lets us derive a handover decision based on the overall performance seen by the user. We show in simulation that this handover algorithm performs well in differentiating between beneficial and decremental handovers.