International Conference on Collaborative Computing: Networking, Applications and Worksharing

Collaborative Computing: Networking, Applications, and Worksharing pp 173-182 | Cite as

Characterizing Interference in a Campus WiFi Network via Mobile Crowd Sensing

  • Chengwei Zhang
  • Dongsheng Qiu
  • Shiling Mao
  • Xiaojun Hei
  • Wenqing Cheng
Conference paper
Part of the Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering book series (LNICST, volume 163)

Abstract

WiFi networks and smartphones have been penetrating into people’s daily life pervasively. The increasingly dense deployments of WiFi APs have led to the severe spectrum usage overlap and channel interference. In this paper, we proposed a mobile crowd sensing method to characterize the interference experienced by a campus WiFi network by utilizing the powerful sensing capability of smartphone and users’ mobility. We designed and implemented a mobile measurement App. This App can help the volunteers to sense the neighboring WiFi APs in the background on the Android mobile phones. The measurement data are then uploaded to the measurement repository server for further data analysis. Our measurement results showed that both 2.4 GHz and 5 GHz WiFi APs have been commonly deployed on campus, and 2.4 GHz APs dominate for around \(80\,\%\) of total measured APs. The spectrum overlap and channel interference in the 2.4 GHz band is much severe than that in the 5 GHz band. The rising WiFi interference is due to the uncoordinated planning, random deployment and intensive density of WiFi networks at different locations. Our field measurement study may provide guidelines to design the next generation software-defined WiFi networks in order to achieve high performance with minimized interference.

Keywords

Mobile crowd sensing WiFi Spectrum interference Internet measurement Android system 

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Copyright information

© Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2016

Authors and Affiliations

  • Chengwei Zhang
    • 1
  • Dongsheng Qiu
    • 1
  • Shiling Mao
    • 1
  • Xiaojun Hei
    • 1
  • Wenqing Cheng
    • 1
  1. 1.School of Electronic Information and CommunicationsHuazhong University of Science and TechnologyWuhanChina

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