RF-Chord: Towards Deployable RFID Localization System for Logistic Networks

Authors: 

Bo Liang, Peking University and Alibaba Group; Purui Wang, Massachusetts Institute of Technology; Renjie Zhao, University of California San Diego; Heyu Guo, Peking University; Pengyu Zhang and Junchen Guo, Alibaba Group; Shunmin Zhu, Tsinghua University and Alibaba Group; Hongqiang Harry Liu, Alibaba Group; Xinyu Zhang, University of California San Diego; Chenren Xu, Peking University, Zhongguancun Laboratory, and Key Laboratory of High Confidence Software Technologies, Ministry of Education (PKU)

Abstract: 

RFID localization is considered the key enabler of automating the process of inventory tracking and management for the high-performance logistic network. A practical and deployable RFID localization system needs to meet reliability, throughput, and range requirements. This paper presents RF-CHORD, the first RFID localization system that simultaneously meets all three requirements. RF-CHORD features a multisine-constructed wideband design that can process RF signals with a 200 MHz bandwidth in real-time to facilitate one-shot localization at scale. In addition, multiple SINR enhancement techniques are designed for range extension. On top of that, a kernel-layer near-field localization framework and a multipath-suppression algorithm are proposed to reduce the 99th long-tail errors. Our empirical results show that RF-CHORD can localize up to 180 tags 6 m away from a reader within 1 second and with 99th longtail error of 0.786 m, achieving a 0% miss reading rate and ~0.01% cross-reading rate in the warehouse and fresh food delivery store deployment.

NSDI '23 Open Access Sponsored by
King Abdullah University of Science and Technology (KAUST)

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BibTeX
@inproceedings {285202,
author = {Bo Liang and Purui Wang and Renjie Zhao and Heyu Guo and Pengyu Zhang and Junchen Guo and Shunmin Zhu and Hongqiang Harry Liu and Xinyu Zhang and Chenren Xu},
title = {{RF-Chord}: Towards Deployable {RFID} Localization System for Logistic Networks},
booktitle = {20th USENIX Symposium on Networked Systems Design and Implementation (NSDI 23)},
year = {2023},
isbn = {978-1-939133-33-5},
address = {Boston, MA},
pages = {1783--1799},
url = {https://www.usenix.org/conference/nsdi23/presentation/liang-bo},
publisher = {USENIX Association},
month = apr
}
Liang Paper (Prepublication) PDF

Presentation Video