IEEE J Biomed Health Inform. 2018 May;22(3):785-798. doi: 10.1109/JBHI.2017.2741720. Epub 2017 Aug 18.
Internet enabled body area networks (BANs) will form a core part of future remote health monitoring and ambient assisted living technology. In BAN applications, due to the dynamic nature of human activity, the off-body BAN channel can be prone to deep fading caused by body shadowing and multipath fading. Using this knowledge, we present some novel practical adaptive power control protocols based on the channel deviation to simultaneously prolong the lifetime of wearable devices and reduce outage probability. The proposed schemes are both flexible and relatively simple to implement on hardware platforms with constrained resources making them inherently suitable for BAN applications. We present the key algorithm parameters used to dynamically respond to the channel variation. This allows the algorithms to achieve a better energy efficiency and signal reliability in everyday usage scenarios such as those in which a person undertakes many different activities (e.g., sitting, walking, standing, etc.). We also profile their performance against traditional, optimal, and other existing schemes for which it is demonstrated that not only does the outage probability reduce significantly, but the proposed algorithms also save up to average transmit power compared to the competing schemes.
互联网支持的体域网 (BAN) 将成为未来远程健康监测和环境辅助生活技术的核心部分。在 BAN 应用中，由于人体活动的动态特性，体外 BAN 信道容易受到人体遮挡和多径衰落引起的深度衰落。利用这一知识，我们提出了一些新的实用自适应功率控制协议，这些协议基于信道偏差，旨在同时延长可穿戴设备的使用寿命并降低中断概率。所提出的方案不仅灵活，而且在资源受限的硬件平台上实现相对简单，因此非常适合 BAN 应用。我们提出了用于动态响应信道变化的关键算法参数。这使得算法在日常使用场景中（例如，人进行许多不同的活动，如坐着、走路、站立等）能够实现更好的能量效率和信号可靠性。我们还针对传统的、最优的和其他现有的方案对其性能进行了分析，结果表明，不仅中断概率显著降低，而且与竞争方案相比，所提出的算法还可以平均节省传输功率。
