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Pan Hui's Publications

Cellular Traffic Offloading through WiFi Networks
Citation key DHHL-CTOTWN-11
Author Dimatteo, Savio and Hui, Pan and Han, Bo and Li, Viktor O.K.
Title of Book Proceedings of 8th IEEE International Conference on Mobile Ad-Hoc and Sensor Systems (MASS '11)
Pages 192–201
Year 2011
ISBN 978-1-4577-1345-3
ISSN 2155-6806
DOI http://dx.doi.org/10.1109/MASS.2011.26
Location Valencia, Spain
Address New York, NY, USA
Month October
Publisher IEEE
Abstract Cellular networks are currently facing the challenges of mobile data explosion. High-end mobile phones and laptops double their mobile data traffic every year and this trend is expected to continue given the rapid development of mobile social applications. It is imperative that novel architectures be developed to handle such voluminous mobile data. In this paper, we propose and evaluate an integrated architecture exploiting the opportunistic networking paradigm to migrate data traffic from cellular networks to metropolitan WiFi access points (APs). To quantify the benefits of deploying such an architecture, we consider the case of bulk file transfer and video streaming over 3G networks and simulate data delivery using real mobility data set of 500 taxis in an urban area. We are the first to quantitatively evaluate the gains of city-wide WiFi offloading using large scale real traces. Our results give the numbers of APs needed for different requirements of quality of service for data delivery in large metropolitan area. We show that even with a sparse WiFi network the delivery performance can be significantly improved. This effort serves as an important feasibility study and provides guidelines for operators to evaluate the possibility and cost of this solution.
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