Please use this identifier to cite or link to this item: http://hdl.handle.net/1783.1/83481

Participatory Sensing Meets Opportunistic Sharing: Automatic Phone-to-Phone Communication in Vehicles

Authors Sun, Xiaoshan
Hu, Shaohan
Su, Lu
Abdelzaher, Tarek F.
Hui, Pan View this author's profile
Zheng, Wei HKUST affiliated (currently or previously)
Liu, Hengchang
Stankovic, John A.
Issue Date 2016
Source IEEE Transactions on Mobile Computing , v. 15, (10), October 2016, article number 7337442, p. 2550-2563
Summary This paper explores direct phone-to-phone communication (via WiFi interface) among vehicles to support participatory sensing applications. Sensing data usually contains location, speed, and fuel consumption of the car, and has a long time delay between collected and transferred to the server. Direct communication among phones aboard is important in reducing data transfer delay time and sharing participatory sensing information in an inexpensive manner. We design a practical and optimized communication mechanism for direct phone-to-phone data transfer among phones aboard that strategically enables phone-to-phone and/or phone-to-WiFiAP communications by optimally toggling the phones between the normal client and the hotspot modes. We take advantage of the WiFi hotspot functionality on smartphones, and hence require neither involvement of participants nor changes to existing wireless infrastructure and protocols. An analytical model is established to optimize toggling between client and hotspot modes for optimal system efficiency. We fully implement this system on off-the-shelf Google Galaxy Nexus and Nexus S phones. Through a 35-vehicle two-month deployment study, as well as simulation experiments using the real-world T-drive 9,211-taxicab dataset, we show that our solution significantly reduces data transfer delay time and maintains over 80 percent system efficiency under varying system parameters. © 2016 IEEE.
Subjects
ISSN 1536-1233
1558-0660
Language English
Format Article
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