Collaborative Research : SWIFT : Effective Spectrum Utilization for Coexisting Active, Semi-passive, and Passive IoT Systems

物联网（IoT）设备在许多应用中的使用呈指数级增长。通过将数十亿个传感器、执行器和各种智能物体连接到互联网，物联网将产生前所未有的大量信息，以便在众多公共和私营部门做出更明智的决策。为了支持各种应用，物联网设备通过不同类型的通信网络（例如，LTE, WiFi， ZigBee等）连接。为了支持未来的物联网设备，反向散射技术提供了一个有前途的方向：1)通过重用现有的射频信号来提高频谱效率；Ii)节能通信；三是成本低。在这个项目中，我们建议创建一个频率不可知的反向散射系统，可以跨不同的协议和频段运行。这项研究如果成功，将成为开发和部署新应用的催化剂，从而通过促进与基于物联网的应用相关的就业增长，对美国经济产生潜在的巨大影响。该研究还将丰富无线网络和移动计算的科学知识。ppi一直坚定地致力于扩大对计算机的参与，并计划提高K-12学生和其他代表性不足的少数群体对技术的兴趣。此外，PIs旨在通过高级设计项目提高本科生的研究经验。该项目的目标是设计一种与频率无关的反向散射系统，该系统可以跨不同的无线协议（例如，LTE、WiFi、ZigBee）和频段运行，并有可能部署在不同的位置以支持各种应用。为了实现这一目标，我们提出了一个整体解决方案，以解决频谱利用和不同频段有源、半无源和无源物联网设备共存的挑战。具体而言，我们寻求研究新的硬件设计，可以提高在不同频段工作的异构网络中的整体频谱利用率。我们提出的研究可以有效地解决在有源和无源无线电共存的物联网网络中频谱利用的挑战。该奖项反映了美国国家科学基金会的法定使命，并通过使用基金会的知识价值和更广泛的影响审查标准进行评估，被认为值得支持。

The use of Internet-of-Things (IoT) devices in many applications has been increasing exponentially. By connecting billions of sensors, actuators, and various smart objects to the Internet, IoT will produce an unprecedented amount of information for making more informed decisions in numerous public and private sectors. To support various applications, IoT devices are connected via different types of communication networks (e.g., LTE, WiFi, ZigBee, etc.). To support future IoT devices, backscatter technology provides a promising direction with i) high spectrum efficiency by reusing existing RF signal; ii) energy-efficient communication; and iii) low cost. In this project, we propose to create a frequency agnostic backscatter system that can operate across different protocols and frequency bands. The proposed research, if successful, can be a catalyst for developing and deploying new applications, thus having a potentially enormous impact on the U.S. economy by fostering job growth related to IoT-based applications. The proposed research will also enrich the scientific knowledge of wireless networking and mobile computing. The PIs have been strongly committed to broadening participation in computing and have plans to raise interest in technology among K-12 students and other underrepresented minority groups. In addition, the PIs aim to enhance undergraduate research experience through senior design projects.The goal of this project is to design a frequency agnostic backscatter system that can operate across different wireless protocols (e.g., LTE, WiFi, ZigBee) and frequency bands and has the potential to be deployed at different locations to support various applications. To achieve this goal, we propose a holistic solution to address the challenges of spectrum utilization and coexistence among active, semi-passive, and passive IoT devices across different frequency bands. Specifically, we seek to investigate novel hardware designs that can improve the overall spectrum utilization in heterogeneous networks that work in different frequency bands. Our proposed research can effectively address the challenges of spectrum utilization in the IoT networks with coexisting active and passive radios.This award reflects NSF's statutory mission and has been deemed worthy of support through evaluation using the Foundation's intellectual merit and broader impacts review criteria.