NetScatter: Enabling Large-Scale Backscatter Networks

Authors: 

Mehrdad Hessar, Ali Najafi, and Shyamnath Gollakota, University of Washington

Abstract: 

We present the first wireless protocol that scales to hundreds of concurrent transmissions from backscatter devices. Our key innovation is a distributed coding mechanism that works below the noise floor, operates on backscatter devices and can decode all the concurrent transmissions at the receiver using a single FFT operation. Our design addresses practical issues such as timing and frequency synchronization as well as the near-far problem. We deploy our design using a testbed of backscatter hardware and show that our protocol scales to concurrent transmissions from 256 devices using a bandwidth of only 500 kHz. Our results show throughput and latency improvements of 14–62x and 15–67x over existing approaches and 1–2 orders of magnitude higher transmission concurrency.

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BibTeX
@inproceedings {226002,
author = {Mehrdad Hessar and Ali Najafi and Shyamnath Gollakota},
title = {NetScatter: Enabling Large-Scale Backscatter Networks},
booktitle = {16th {USENIX} Symposium on Networked Systems Design and Implementation ({NSDI} 19)},
year = {2019},
isbn = {978-1-931971-49-2},
address = {Boston, MA},
pages = {271--284},
url = {https://www.usenix.org/conference/nsdi19/presentation/hessar},
publisher = {{USENIX} Association},
}