Occupant counting modelling for intelligent buildings based on data from multiple WiFi sniffers
by Ping Wang; Zhenya Zhang; Qiansheng Fang; Huaqian Cao; Si Chen
International Journal of Simulation and Process Modelling (IJSPM), Vol. 15, No. 4, 2020

Abstract: Knowing the occupancy information in each room can create energy saving through intelligent control of HVAC systems. In this paper, a classification-based occupant counting method using multiple WiFi sniffers is proposed firstly to get a coarse estimation of occupancy. Then, to deal with the false negative problem, i.e., those occupants who do not carry a smartphone or if the WiFi module is not enabled and cannot be counted, a p-persistent frequent itemsets with 1-right-hand-side (RHS)-based occupant correction algorithm is further proposed to improve the occupant detection accuracy using association analysis. Finally, our methods are validated through real experiments. Results show that our classification-based occupant detection method using multiple WiFi sniffers outperforms the 1-WiFi-sniffer-based method, and the association analysis-based correction algorithm can improve the accuracy because it can see occupants in buildings that the naive WiFi-based occupant detection method cannot see, which makes it suffice to be a viable approach to occupant estimation for intelligent buildings.

Online publication date: Thu, 08-Oct-2020

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