CAREER: Internet Connectivity for the Next Billion Devices

职业：未来十亿设备的互联网连接

• 批准号: 1452494
• 负责人: Shyamnath Gollakota
• 金额: $ 44.89万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-04-01 至 2021-03-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1452494&HistoricalAwards=false
• 关键词: CAREER; Internet; Connectivity; Next; Billion

There is increasing interest in the Internet-­of­ Things where small computing devices are embedded in everyday objects and environments. A key issue is how to power these devices as they become smaller and numerous; batteries add bulk, cost, and require recharging that is difficult at large scale. This project proposes to design battery-free devices that can connect to the Internet using the WiFi networks around us. This proposed research is expected to create a pragmatic shift in the WiFi industry where in addition to providing connectivity to Wi­Fi device, routers can now tap into the RF­ powered device ecosystem.Conventional low-­power Wi­Fi transceivers require much more power than is available from wireless signals, making it infeasible for RF-­powered devices to literally speak the WiFi protocol. The proposed research will produce algorithms, designs, circuits, and system implementations that will enable the first communication link between RF-powered devices and off the-shelf Wi­Fi devices, without the need to speak Wi­Fi. This project will develop a range of techniques from new low-­power analog codes to Wi­Fi rate adaptation algorithms to push the limits on our communication range and rate. The project will also design a complete network stack that enables multiple such devices to co-­exist and develop full-duplex capabilities on these battery-­free devices to significantly improve the power efficiencies of the resulting link-­ and network-­layer protocols. If successful, this project would create the critical component in the vision of RF-­powered Internet of things: an ability to connect billions of RF-­powered devices to existing Internet infrastructure.

人们对物联网的兴趣日益增加，其中小型计算设备嵌入在日常物体和环境中。一个关键问题是如何为这些设备提供动力，因为它们变得越来越小和越来越多;电池增加了体积，成本，并且需要充电，这在大规模上是困难的。该项目旨在设计无电池设备，可以使用我们周围的WiFi网络连接到互联网。这项拟议中的研究预计将在WiFi行业创造一个务实的转变，除了提供与WiFi设备的连接，路由器现在可以进入射频无线电供电设备生态系统。传统的低功耗WiFi收发器需要比无线信号提供的功率多得多的功率，使得射频无线电供电设备无法真正说出WiFi协议。拟议的研究将产生算法，设计，电路和系统实现，这将使射频供电设备和现成的Wi-Fi设备之间的第一个通信链路，而不需要说Wi-Fi。该项目将开发一系列技术，从新的低功耗模拟代码到Wi-Fi速率自适应算法，以推动我们的通信范围和速率的限制。该项目还将设计一个完整的网络堆栈，使多个此类设备能够共存，并在这些无电池设备上开发全双工功能，以显著提高最终链路层和网络层协议的功率效率。如果成功，该项目将创造射频驱动物联网愿景中的关键组件：将数十亿射频驱动设备连接到现有互联网基础设施的能力。

项目成果

NetScatter: Enabling Large-Scale Backscatter Networks

NetScatter：实现大规模反向散射网络

• 发表时间: 2019
• 期刊: Proceedings of the 16th USENIX Symposium on Networked Systems Design and Implementation (NSDI ’19
• 作者: Hessar, M;Najafi, A: Gollakota
• 通讯作者: Najafi, A: Gollakota