The changing usage of a mature campus-wide wireless network
Proceedings of the 10th annual international conference on Mobile computing and networking
Observing slow crustal movement in residential user traffic
CoNEXT '08 Proceedings of the 2008 ACM CoNEXT Conference
3G and 3.5G wireless network performance measured from moving cars and high-speed trains
Proceedings of the 1st ACM workshop on Mobile internet through cellular networks
Measuring serendipity: connecting people, locations and interests in a mobile 3G network
Proceedings of the 9th ACM SIGCOMM conference on Internet measurement conference
Where's that phone?: geolocating IP addresses on 3G networks
Proceedings of the 9th ACM SIGCOMM conference on Internet measurement conference
Anatomizing application performance differences on smartphones
Proceedings of the 8th international conference on Mobile systems, applications, and services
Proceedings of the 8th international conference on Mobile systems, applications, and services
Augmenting mobile 3G using WiFi
Proceedings of the 8th international conference on Mobile systems, applications, and services
An experimental performance comparison of 3G and Wi-Fi
PAM'10 Proceedings of the 11th international conference on Passive and active measurement
A first look at mobile hand-held device traffic
PAM'10 Proceedings of the 11th international conference on Passive and active measurement
Mobile data offloading: how much can WiFi deliver?
Proceedings of the 6th International COnference
A comparative study of handheld and non-handheld traffic in campus Wi-Fi networks
PAM'11 Proceedings of the 12th international conference on Passive and active measurement
Identifying diverse usage behaviors of smartphone apps
Proceedings of the 2011 ACM SIGCOMM conference on Internet measurement conference
Beyond deployments and testbeds: experiences with public usage on vehicular WiFi hotspots
Proceedings of the 10th international conference on Mobile systems, applications, and services
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A promising way to use limited 3G mobile resources efficiently is 3G mobile traffic offloading through WiFi by the user side. However, we currently do not know enough about how effective the mobile traffic offloading is in the wild. In this paper, we report the results of a two-day-long user-based measurement of mobile traffic offloading by over 400 android smartphone users in Japan. We first explain that the variation of aggregated traffic volume via WiFi is much greater than that via 3G in our dataset. Next, we show that the traffic volume offloading through WiFi is common over whole weekend and weekday night, though weekday rush hours have less chance of traffic offloading. Our results emphasize that a small fraction of users contribute to a large fraction of offload traffic volume. In fact, our per-user level analysis reveals that the top 30% of users downloaded over 90% of their total traffic volume via WiFi. However, bottom 20% of users stuck to 3G only and over 50% of users turned off the WiFi interface in business hours. Also, 17.4% of the total traffic volume was generated by users whose WiFi traffic volume was less than 1MB. We observed that some hybrid users downloaded most of their traffic volume via WiFi in shorter durations. In this sense, there is more room to improve the current traffic offloading by promoting users to use WiFi more effectively. Furthermore, we demonstrate that WiFi offloading is mainly performed by access points (APs) in homes while the use of public WiFi APs is still uncommon in our dataset.