Abstract
With the development of the Internet of Things (IoT) and the popularization of commercial WiFi, researchers have begun to use commercial WiFi for human activity recognition in the past decade. However, cross-scene activity recognition is still difficult due to the different distribution of samples in different scenes. To solve this problem, we try to build a cross-scene activity recognition system based on commercial WiFi. Firstly, we use commercial WiFi devices to collect channel state information (CSI) data and use the Bi-directional long short-term memory (BiLSTM) network to train the activity recognition model. Then, we use the transfer learning mechanism to transfer the model to fit another scene. Finally, we conduct experiments to evaluate the performance of our system, and the experimental results verify the accuracy and robustness of our proposed system. For the source scene, the accuracy of the model trained from scratch can achieve over 90%. After transfer learning, the accuracy of cross-scene activity recognition in the target scene can still reach 90%.
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Yuanrun Fang received a Bachelor’s degree in Communication Engineering from Nanjing University of Posts and Telecommunications, China. He is currently a postgraduate in School of Computer, Nanjing University of Posts and Telecommunications, China. His current research interests are wireless sensor networks.
Fu Xiao received the PhD degree in Computer Science and Technology from Nanjing University of Science and Technology, China in 2007. He is currently a Professor and PhD supervisor with the School of Computer, Nanjing University of Posts and Telecommunications, China. His research papers have been published in many prestigious conferences and journals such as IEEE INFOCOM, IEEE ICC, IEEE IPCCC, IEEE/ACM ToN, IEEE JSAC, IEEE TMC, ACM TECS, IEEE TVT and so on. His research interests are mainly in the areas of Internet of things and mobile computing. Dr. Xiao is a member of the IEEE Computer Society and the Association for Computing Machinery.
Biyun Sheng received the BS and MS degrees in the School of Electrical and Information Engineering, Jiangsu University, China, and the PhD degree in School of Automation, Southeast University, China in 2010, 2013 and 2017, respectively. Now, she is with the School of Computer, Nanjing University of Posts and Telecommunications, China. Her research interests include pattern recognition, computer vision, machine learning and wireless sensing.
Letian Sha received the BS and MS degrees in the School of computer, Southwest Jiaotong University, China, and the PhD degree in School of computer, Wuhan University, China in 2007, 2010 and 2014, respectively. Now, he is with the School of Computer, Nanjing University of Posts and Telecommunications, China. His research interests include network security WSN security, IoT security and information security.
Lijuan Sun received the PhD degree in information and communication from the Nanjing University of Posts and Telecommunications, China in 2007. She is currently a Professor and a PhD Supervisor with the School of Computer, Nanjing University of Posts and Telecommunications, China. Her main research interests are wireless sensor networks and wireless mesh networks.
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Fang, Y., Xiao, F., Sheng, B. et al. Cross-scene passive human activity recognition using commodity WiFi. Front. Comput. Sci. 16, 161502 (2022). https://doi.org/10.1007/s11704-021-0407-8
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DOI: https://doi.org/10.1007/s11704-021-0407-8