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首页> 外文期刊>IEEE transactions on mobile computing >Energy Provisioning in Wireless Rechargeable Sensor Networks
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Energy Provisioning in Wireless Rechargeable Sensor Networks

机译：无线可充电传感器网络中的能量供应

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Wireless rechargeable sensor networks (WRSNs) have emerged as an alternative to solving the challenges of size and operation time posed by traditional battery-powered systems. In this paper, we study a WRSN built from the industrial wireless identification and sensing platform (WISP) and commercial off-the-shelf RFID readers. The paper-thin WISP tags serve as sensors and can harvest energy from RF signals transmitted by the readers. This kind of WRSNs is highly desirable for indoor sensing and activity recognition and is gaining attention in the research community. One fundamental question in WRSN design is how to deploy readers in a network to ensure that the WISP tags can harvest sufficient energy for continuous operation. We refer to this issue as the energy provisioning problem. Based on a practical wireless recharge model supported by experimental data, we investigate two forms of the problem: point provisioning and path provisioning. Point provisioning uses the least number of readers to ensure that a static tag placed in any position of the network will receive a sufficient recharge rate for sustained operation. Path provisioning exploits the potential mobility of tags (e.g., those carried by human users) to further reduce the number of readers necessary: mobile tags can harvest excess energy in power-rich regions and store it for later use in power-deficient regions. Our analysis shows that our deployment methods, by exploiting the physical characteristics of wireless recharging, can greatly reduce the number of readers compared with those assuming traditional coverage models.
机译：无线可充电传感器网络（WRSN）已成为解决传统电池供电系统带来的尺寸和工作时间挑战的替代方案。在本文中，我们研究了由工业无线识别和传感平台（WISP）和商用现货RFID阅读器构建的WRSN。薄如纸的WISP标签用作传感器，可以从阅读器传输的RF信号中获取能量。这种WRSN非常适合用于室内传感和活动识别，并且正在引起研究界的关注。 WRSN设计中的一个基本问题是如何在网络中部署读取器，以确保WISP标签可以获取足够的能量以进行连续操作。我们将此问题称为能量供应问题。基于实验数据支持的实用无线充电模型，我们研究了问题的两种形式：点供应和路径供应。 Point Provisioning使用最少数量的读取器，以确保放置在网络任何位置的静态标签将获得足够的充电率，以实现持续运行。路径配置可利用标签的潜在移动性（例如，人类用户携带的标签）来进一步减少所需的读取器数量：移动标签可以在功率丰富的区域中收集多余的能量，并将其存储以供以后在功率不足的区域中使用。我们的分析表明，与采用传统覆盖模型的读者相比，我们的部署方法通过利用无线充电的物理特性，可以大大减少读者数量。

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