Abstract
Wi-Fi sensing systems leverage wireless signals from widely deployed Wi-Fi devices to realize sensing for a broad range of applications. However, current Wi-Fi sensing systems heavily rely on the channel state information (CSI) to learn the signal propagation characteristics, while the availability of CSI is highly dependent on specific Wi-Fi chipsets. Through a city-scale measurement, we discover that the availability of CSI is extremely limited in operational Wi-Fi devices. In this work, we propose a new wireless sensing system called BeamSense that exploits the compressed beamforming reports (CBR). Due to the extensive support of transmit beamforming in operational Wi-Fi devices, CBR is commonly accessible and hence enables a ubiquitous sensing capability. BeamSense adopts a novel multi-path estimation algorithm that can efficiently and accurately map bidirectional CBR to a multi-path channel based on intrinsic fingerprints. We implement BeamSense on several prevalent models of Wi-Fi devices and evaluated its performance with microbenchmarks and three representative Wi-Fi sensing applications. The results show that BeamSense is capable of enabling existing CSI-based sensing algorithms to work with CBR with high sensing accuracy and improved generalizability. © 2023 ACM.
Original language | English |
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Title of host publication | SIGCOMM '23: Proceedings of the ACM SIGCOMM 2023 Conference |
Place of Publication | New York, NY |
Publisher | Association for Computing Machinery |
Pages | 20-32 |
ISBN (Print) | 979-8-4007-0236-5 |
DOIs | |
Publication status | Published - 2023 |
Event | 37th ACM SIGCOMM (ACM SIGCOMM 2023) - Columbia University, New York City, United States Duration: 10 Sept 2023 → 14 Sept 2023 https://conferences.sigcomm.org/sigcomm/2023/ |
Publication series
Name | SIGCOMM - Proceedings of the ACM SIGCOMM Conference |
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Conference
Conference | 37th ACM SIGCOMM (ACM SIGCOMM 2023) |
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Abbreviated title | SIGCOMM 2023 |
Country/Territory | United States |
City | New York City |
Period | 10/09/23 → 14/09/23 |
Internet address |