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Relative Localization of RFID Tags using Spatial-Temporal Phase Profiling
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You are not authorized to post comments.Longfei Shangguan, The Hong Kong University of Science and Technology and Tsinghua University; Zheng Yang, Tsinghua University; Alex X. Liu, Michigan State University; Zimu Zhou, The Hong Kong University of Science and Technology; Yunhao Liu, Tsinghua University
Many object localization applications need the relative locations of a set of objects as oppose to their absolute locations. Although many schemes for object localization using Radio Frequency Identification (RFID) tags have been proposed, they mostly focus on absolute object localization and are not suitable for relative object localization because of large error margins and the special hardware that they require. In this paper, we propose an approach called Spatial-Temporal Phase Profiling (STPP) to RFID based relative object localization. The basic idea of STPP is that by moving a reader over a set of tags during which the reader continuously interrogating the tags, for each tag, the reader obtains a sequence of RF phase values, which we call a phase profile, from the tag’s responses over time. By analyzing the spatial-temporal dynamics in the phase profiles, STPP can calculate the spatial ordering among the tags. In comparison with prior absolute object localization schemes, STPP requires neither dedicated infrastructure nor special hardware. We implemented STPP and evaluated its performance in two real-world applications: locating misplaced books in a library and determining baggage order in an airport. The experimental results show that STPP achieves about 84% ordering accuracy for misplaced books and 95% ordering accuracy for baggage handling.
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author = {Longfei Shangguan and Zheng Yang and Alex X. Liu and Zimu Zhou and Yunhao Liu},
title = {Relative Localization of {RFID} Tags using {Spatial-Temporal} Phase Profiling},
booktitle = {12th USENIX Symposium on Networked Systems Design and Implementation (NSDI 15)},
year = {2015},
isbn = {978-1-931971-218},
address = {Oakland, CA},
pages = {251--263},
url = {https://www.usenix.org/conference/nsdi15/technical-sessions/presentation/shangguan},
publisher = {USENIX Association},
month = may
}
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