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LoRa Backscatter: Enabling The Vision of Ubiquitous Connectivity

Authors:

Mehrdad Hessar,

Joshua R. Smith,

Shyamnath GollakotaAuthors Info & Claims

Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies, Volume 1, Issue 3

Article No.: 105, Pages 1 - 24

https://doi.org/10.1145/3130970

Published: 11 September 2017 Publication History

Abstract

The vision of embedding connectivity into billions of everyday objects runs into the reality of existing communication technologies -- there is no existing wireless technology that can provide reliable and long-range communication at tens of microwatts of power as well as cost less than a dime. While backscatter is low-power and low-cost, it is known to be limited to short ranges. This paper overturns this conventional wisdom about backscatter and presents the first wide-area backscatter system. Our design can successfully backscatter from any location between an RF source and receiver, separated by 475 m, while being compatible with commodity LoRa hardware. Further, when our backscatter device is co-located with the RF source, the receiver can be as far as 2.8 km away. We deploy our system in a 4,800 ft2 (446 m2) house spread across three floors, a 13,024 ft2 (1210 m2) office area covering 41 rooms, as well as a one-acre (4046 m2) vegetable farm and show that we can achieve reliable coverage, using only a single RF source and receiver. We also build a contact lens prototype as well as a flexible epidermal patch device attached to the human skin. We show that these devices can reliably backscatter data across a 3,328 ft2 (309 m2) room. Finally, we present a design sketch of a LoRa backscatter IC that shows that it costs less than a dime at scale and consumes only 9.25 μW of power, which is more than 1000x lower power than LoRa radio chipsets.

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Cited By

Werner CWallrabe UChristen AComella LDormann CGöritz AGrote RHaberstroh SJouda MKiese RKoch BKorvink JKreuzwieser JLang FMüller JPrucker OReiterer ARühe JRupitsch SSchack-Kirchner HSchmitt KStobbe NWeiler MWoias PWöllenstein J(2024)ECOSENSE - Multi-scale quantification and modelling of spatio-temporal dynamics of ecosystem processes by smart autonomous sensor networksResearch Ideas and Outcomes10.3897/rio.10.e12935710Online publication date: 12-Jul-2024
https://doi.org/10.3897/rio.10.e129357
Padmal MPiumwardane DRohner CVoigt T(2024)Channel Estimation for Analog Backscatter TagsProceedings of the First International Workshop on Radio Frequency (RF) Computing10.1145/3698386.3699989(1-7)Online publication date: 4-Nov-2024
https://dl.acm.org/doi/10.1145/3698386.3699989
Scott DBringle MFahad IMorales GZahid ASwaminathan S(2024)NeuroCamTags: Long-Range, Battery-free, Wireless Sensing with Neuromorphic CamerasProceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies10.1145/36785298:3(1-25)Online publication date: 9-Sep-2024
https://dl.acm.org/doi/10.1145/3678529
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Index Terms

LoRa Backscatter: Enabling The Vision of Ubiquitous Connectivity
1. Hardware
  1. Communication hardware, interfaces and storage
2. Human-centered computing
  1. Ubiquitous and mobile computing

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cover image Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies

Proceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies Volume 1, Issue 3

September 2017

2023 pages

EISSN:2474-9567

DOI:10.1145/3139486

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Copyright © 2017 ACM.

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Publication History

Published: 11 September 2017

Accepted: 01 August 2017

Revised: 01 July 2017

Received: 01 May 2017

Published in IMWUT Volume 1, Issue 3

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Werner CWallrabe UChristen AComella LDormann CGöritz AGrote RHaberstroh SJouda MKiese RKoch BKorvink JKreuzwieser JLang FMüller JPrucker OReiterer ARühe JRupitsch SSchack-Kirchner HSchmitt KStobbe NWeiler MWoias PWöllenstein J(2024)ECOSENSE - Multi-scale quantification and modelling of spatio-temporal dynamics of ecosystem processes by smart autonomous sensor networksResearch Ideas and Outcomes10.3897/rio.10.e12935710Online publication date: 12-Jul-2024
https://doi.org/10.3897/rio.10.e129357
Padmal MPiumwardane DRohner CVoigt T(2024)Channel Estimation for Analog Backscatter TagsProceedings of the First International Workshop on Radio Frequency (RF) Computing10.1145/3698386.3699989(1-7)Online publication date: 4-Nov-2024
https://dl.acm.org/doi/10.1145/3698386.3699989
Scott DBringle MFahad IMorales GZahid ASwaminathan S(2024)NeuroCamTags: Long-Range, Battery-free, Wireless Sensing with Neuromorphic CamerasProceedings of the ACM on Interactive, Mobile, Wearable and Ubiquitous Technologies10.1145/36785298:3(1-25)Online publication date: 9-Sep-2024
https://dl.acm.org/doi/10.1145/3678529
Garg NGhosh ARoy NShu YLiu JTan RHe YChen J(2024)LiTEfoot: Ultra-low-power Localization using Ambient Cellular SignalsProceedings of the 22nd ACM Conference on Embedded Networked Sensor Systems10.1145/3666025.3699356(535-548)Online publication date: 4-Nov-2024
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