Choosing beacon periods to improve response times for wireless HTTP clients
Proceedings of the second international workshop on Mobility management & wireless access protocols
A measurement study of vehicular internet access using in situ Wi-Fi networks
Proceedings of the 12th annual international conference on Mobile computing and networking
Youtube traffic characterization: a view from the edge
Proceedings of the 7th ACM SIGCOMM conference on Internet measurement
Scanning Delays in 802.11 Networks
NGMAST '07 Proceedings of the The 2007 International Conference on Next Generation Mobile Applications, Services and Technologies
Cabernet: vehicular content delivery using WiFi
Proceedings of the 14th ACM international conference on Mobile computing and networking
Data downloading on the sparse coverage-based wireless networks
Journal of Electrical and Computer Engineering
DTN support for news dissemination in an urban area
NETWORKING'11 Proceedings of the 10th international IFIP TC 6 conference on Networking - Volume Part I
Spider: improving mobile networking with concurrent wi-fi connections
Proceedings of the ACM SIGCOMM 2011 conference
Casting doubts on the viability of WiFi offloading
Proceedings of the 2012 ACM SIGCOMM workshop on Cellular networks: operations, challenges, and future design
Configuring DHCP leases in the smartphone era
Proceedings of the 2012 ACM conference on Internet measurement conference
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Smartphones and WiFi networks are becoming pervasive. As a result, new applications and services are being offered to smartphone users through WiFi networks. Some of the more novel applications provide data services to pedestrians as they move through WiFi coverage areas in public loca- tions such as railway stations. One significant factor that will influence the data transfers for users when they are on the move, is the connection set-up time. In this paper we characterize the WiFi connection set-up process. Using data from voluntary Android smartphone users, we show that WiFi connection setup have significant delays, sometimes as high as 10s. Then through a detailed analysis of the con- nection set-up process we show that, contrary to previous findings, this is due to losses of DHCP messages at the WiFi access point. We also show that some of the methods that have been adopted by device manufactures are suboptimal and this can be addressed at the WiFi access point. Finally using this insight we extend a known mathematical model, which will help in the dimensioning of WiFi networks for pedestrian smartphone users.