NeTS: Small: MegaIoT: Enabling Thousands of Concurrent Transmissions in Low-Power Networks

NeTS：小型：MegaIoT：在低功耗网络中实现数千个并发传输

• 批准号: 1812554
• 负责人: Shyamnath Gollakota
• 金额: $ 50万
• 依托单位: University of Washington
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2018
• 资助国家: 美国
• 起止时间: 2018-10-01 至 2022-09-30
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1812554&HistoricalAwards=false
• 关键词: NeTS; Small; MegaIoT; Enabling; Thousands

Recent advances have enabled low-power radio and backscatter communication systems that enable Internet connected sensors and devices that can operate reliably for more than ten years. However, existing systems do not scale well with large-scale deployments of these devices. The project introduces algorithms that can decode thousands of concurrent transmissions from low-power radio and backscatter devices in city-wide wireless deployments. This enables wireless networks that operate at orders of magnitude lower latency and higher throughput and achieves sensor-networking infrastructure in cities that can potentially scale to millions of devices. To this end, the proposal introduces a novel coding technique called distributed chirp spread spectrum modulation that works below the noise floor, operates on low-power radios as well as backscatter devices and can decode all concurrent transmissions at the receiver using a single FFT (Fast Fourier Transform) operation. The proposal addresses practical issues such as timing and frequency synchronization as well as the near-far problem given the extreme low power requirements of these devices. Finally, a test-bed of these low-power devices will be deployed and the feasibility of concurrent transmissions from hundreds to thousands of devices will be evaluated.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.

最近的进步使低功率无线电和反向散射通信系统能够使Internet连接的传感器和设备可以可靠地运行十多年。但是，与这些设备的大规模部署相比，现有系统不能很好地扩展。该项目引入了算法，该算法可以解码全市无线部署中低功率无线电设备和反向散射设备的数千次传输。这使得无线网络以低潜伏期和更高的吞吐量运行，并在城市中实现传感器网络基础设施，这些基础设施可能会扩展到数百万个设备。为此，该提案引入了一种新颖的编码技术，称为分布式CHIRP传播频谱调制，该技术在噪声底下工作，在低功率无线电上运行以及反向散射设备，并可以使用单个FFT（快速傅立叶变换）操作来解码接收器的所有并发传输。该提案解决了这些设备的极端功率要求，诸如时序和频率同步以及近乎频率问题之类的实际问题。最后，将对这些低功率设备的测试床进行部署，并将评估从数百到数千个设备的同时传输的可行性。该奖项反映了NSF的法定任务，并被认为是值得通过基金会的知识分子优点和更广泛影响的审查标准来通过评估来获得支持的。

项目成果

Wind dispersal of battery-free wireless devices

• DOI: 10.1038/s41586-021-04363-9
• 发表时间: 2022-03-16
• 期刊: NATURE
• 影响因子: 64.8
• 作者: Iyer, Vikram;Gaensbauer, Hans;Gollakota, Shyamnath
• 通讯作者: Gollakota, Shyamnath

Airdropping sensor networks from drones and insects

• DOI: 10.1145/3372224.3419981
• 发表时间: 2020-09
• 期刊: Proceedings of the 26th Annual International Conference on Mobile Computing and Networking
• 作者: Vikram Iyer;Maruchi Kim;Shirley Xue;Anran Wang;Shyamnath Gollakota

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