基于人体运动姿态的体表无线体感网链路传输特征模型
Onbody Link Characteristics under Moving Posture in Body Area Sensor Networks
体感网由于其极低功耗的要求，无线传输容易收到人体的运动姿态和周围环境的影响，特别是对于体表传输。运动姿态对于无线传输的影响目前集中在信道模型研究方面，而对于体感网的MAC协议、路由协议等设计，研究链路层传输特征尤为重要，链路层通信与人体运动、环境的关系是体表体感网应用设计的基础，链路的丢包率、LQI等在具体的运动姿势下的时变特征研究是目前亟待解决的一个重要问题。本文针对2.4Ghz体感网频段的体表传输应用，对静态姿势、走路、跑步情况下体表节点的通信质量进行了实验测试，并对其链路质量的周期性特征进行了分析。实验表明，低功耗体感网链路对人体运动姿势较为敏感，人体的周期性运动引起链路质量的周期性变化，可以用正弦函数进行拟合，其参数与运动姿态、包接收率相关。针对体表传输链路周期性特征的TDMA MAC仿真结果表明，利用体表链路的周期性特征，可以有效提高体感网传输的可靠性。
Wireless transmission in body area sensor network (BASN) is easy interfered by human body moving, especially for the on body transmission. The effects of the human body posture are mainly researched in channel model for BASN. But for MAC and Routing protocol design, link transmitting characteristics such as packet receive rate, RSS etc. are more important than channel model, which is the fundamental for BASN application design. This paper studied link characteristics under posture such as statistic sanding, sitting and walking, and proposed a periodically variation link reliability model. The measurement data shown that link is sensitive for the human posture in low power transmission. The simulation shown that with a periodic time varying, we can improve network reliability of TDMA MAC protocol about 5-10%.
万亚东、王沁
无线通信
体感网可靠性人体姿态体表通信
body sensor networkreliabilitybody postureon-body communication
万亚东,王沁.基于人体运动姿态的体表无线体感网链路传输特征模型[EB/OL].(2013-12-26)[2025-08-26].http://www.paper.edu.cn/releasepaper/content/201312-924.点此复制
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