Mobile and Ubiquitous Systems: Computing, Networking, and Services. 10th International Conference, MOBIQUITOUS 2013, Tokyo, Japan, December 2-4, 2013, Revised Selected Papers

Research Article

A Wearable RFID System for Real-Time Activity Recognition Using Radio Patterns

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  • @INPROCEEDINGS{10.1007/978-3-319-11569-6_29,
        author={Liang Wang and Tao Gu and Hongwei Xie and Xianping Tao and Jian Lu and Yu Huang},
        title={A Wearable RFID System for Real-Time Activity Recognition Using Radio Patterns},
        proceedings={Mobile and Ubiquitous Systems: Computing, Networking, and Services. 10th International Conference, MOBIQUITOUS 2013, Tokyo, Japan, December 2-4, 2013,  Revised Selected Papers},
        proceedings_a={MOBIQUITOUS},
        year={2014},
        month={12},
        keywords={Activity recognition Wearable RFID Real-time},
        doi={10.1007/978-3-319-11569-6_29}
    }
    
  • Liang Wang
    Tao Gu
    Hongwei Xie
    Xianping Tao
    Jian Lu
    Yu Huang
    Year: 2014
    A Wearable RFID System for Real-Time Activity Recognition Using Radio Patterns
    MOBIQUITOUS
    Springer
    DOI: 10.1007/978-3-319-11569-6_29
Liang Wang1,*, Tao Gu2,*, Hongwei Xie1,*, Xianping Tao1,*, Jian Lu1,*, Yu Huang1,*
  • 1: Nanjing University
  • 2: RMIT University
*Contact email: wl@smail.nju.edu.cn, tao.gu@rmit.edu.au, xhw@smail.nju.edu.cn, txp@nju.edu.cn, lj@nju.edu.cn, yuhuang@nju.edu.cn

Abstract

Much work have been done in activity recognition using wearable sensors organized in a body sensor network. The quality and communication reliability of the sensor data much affects the system performance. Recent studies show the potential of using RFID radio information instead of sensor data for activity recognition. This approach has the advantages of low cost and high reliability. Radio-based recognition method is also amiable to packet loss and has the advantages including MAC layer simplicity and low transmission power level. In this paper, we present a novel wearable Radio Frequency Identification (RFID) system using passive tags which are smaller and more cost-effective to recognize human activities in real-time. We exploit RFID radio patterns and extract both spatial and temporal features to characterize various activities. We also address two issues - the false negative issue of tag readings and tag/antenna calibration, and design a fast online recognition system. We develop a prototype system which consists of a wearable RFID system and a smartphone to demonstrate the working principles, and conduct experimental studies with four subjects over two weeks. The results show that our system achieves a high recognition accuracy of 93.6 % with a latency of 5 s.