PlorA: A passive long-range data network from ambient Lora transmissions

Yao Peng, Longfei Shangguan, Yue Hu, Yujie Qian, Xianshang Lin, Xiaojiang Chen, Dingyi Fang, Kyle Jamieson

Research output: Chapter in Book/Report/Conference proceedingConference contribution

45 Scopus citations

Abstract

This paper presents PLoRa, an ambient backscatter design that enables long-range wireless connectivity for batteryless IoT devices. PLoRa takes ambient LoRa transmissions as the excitation signals, conveys data by modulating an excitation signal into a new standard LoRa “chirp” signal, and shifts this new signal to a dierent LoRa channel to be received at a gateway faraway. PLoRa achieves this by a holistic RF front-end hardware and software design, including a low-power packet detection circuit, a blind chirp modulation algorithm and a low-power energy management circuit. To form a complete ambient LoRa backscatter network, we integrate a light-weight backscatter signal decoding algorithm with a MAC-layer protocol that work together to make coexistence of PLoRa tags and active LoRa nodes possible in the network. We prototype PLoRa on a four-layer printed circuit board, and test it in various outdoor and indoor environments. Our experimental results demonstrate that our prototype PCB PLoRa tag can backscatter an ambient LoRa transmission sent from a nearby LoRa node (20 cm away) to a gateway up to 1.1 km away, and deliver 284 bytes data every 24 minutes indoors, or every 17 minutes outdoors. We also simulate a 28-nm low-power FPGA based prototype whose digital baseband processor achieves 220 µW power consumption.

Original languageEnglish (US)
Title of host publicationSIGCOMM 2018 - Proceedings of the 2018 Conference of the ACM Special Interest Group on Data Communication
PublisherAssociation for Computing Machinery, Inc
Pages147-160
Number of pages14
ISBN (Electronic)9781450355674
DOIs
StatePublished - Aug 7 2018
Event2018 Conference of the ACM Special Interest Group on Data Communication, ACM SIGCOMM 2018 - Budapest, Hungary
Duration: Aug 20 2018Aug 25 2018

Publication series

NameSIGCOMM 2018 - Proceedings of the 2018 Conference of the ACM Special Interest Group on Data Communication

Other

Other2018 Conference of the ACM Special Interest Group on Data Communication, ACM SIGCOMM 2018
CountryHungary
CityBudapest
Period8/20/188/25/18

All Science Journal Classification (ASJC) codes

  • Communication
  • Electrical and Electronic Engineering
  • Computer Networks and Communications
  • Signal Processing

Keywords

  • Backscatter
  • LoRa
  • Long-range
  • Wireless networks

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  • Cite this

    Peng, Y., Shangguan, L., Hu, Y., Qian, Y., Lin, X., Chen, X., Fang, D., & Jamieson, K. (2018). PlorA: A passive long-range data network from ambient Lora transmissions. In SIGCOMM 2018 - Proceedings of the 2018 Conference of the ACM Special Interest Group on Data Communication (pp. 147-160). (SIGCOMM 2018 - Proceedings of the 2018 Conference of the ACM Special Interest Group on Data Communication). Association for Computing Machinery, Inc. https://doi.org/10.1145/3230543.3230567