Journal of KIISE (정보과학회 논문지)

Korean Institute of Information Scientists and Engineers (한국정보과학회)
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Performance Analysis of LoRa(Long Range) according to the Distances in Indoor and Outdoor Spaces

실내·외 공간에서 거리에 따른 LoRa(Long Range) 성능 분석

  • 임준영 (부산대학교 전기전자컴퓨터공학과) ;
  • 이재민 (부산대학교 정보컴퓨터공학부) ;
  • 김동현 (부산대학교 전기전자컴퓨터공학과) ;
  • 김종덕 (부산대학교 전기전자컴퓨터공학과)
  • Received : 2017.02.02
  • Accepted : 2017.05.02
  • Published : 2017.07.15
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Abstract

LPWAN(Low Power Wide Area Network) technology is M2M (Machine to Machine) networking technology for the Internet of Things. The technology is designed to support low-power, long-distance and low-speed communications that are typical of LoRaWAN(Long Range Wide Area Network). To exchange inter-object information using a LoRaWAN, the link performances for various environments must be known. however, active performance analysis research that is based on an empirical environment is nonexistent. Therefore, this paper empirically evaluates the performance of the LoRa (Long Range) link, a physical communication technology of the LoRaWAN for various variables that may affect the link quality in indoor and outdoor environments. To achieve this, a physical performance monitoring system was designed and implemented. A communication experiment environment was subsequently constructed based on the indoor and outdoor conditions. The SNR(Signal to Noise Ratio), RSSI(Received Signal Strength Indication), and the PDR(Packet Delivery Ratio) were evaluated.

LPWAN(Low Power Wide Area Network) 기술은 사물인터넷을 위한 M2M(Machine to Machine) 네트워킹 기술이다. 이 기술의 목적은 저전력, 장거리, 저속 통신을 지원하는 것이며 대표적으로 LoRaWAN(Long Range Wide Area Network)가 있다. LoRaWAN를 이용하여 사물들 간의 정보를 교환하기 위해서는 다양한 환경에 대하여 링크의 성능을 알아야 하는데 실증적인 환경을 기반으로 한 성능 분석 연구는 활발하게 진행되고 있지 않다. 따라서 본 논문은 실내, 실외 환경에서 링크 품질에 영향을 끼칠 수 있는 다양한 변수에 대하여 LoRaWAN의 물리적 통신 기술인 LoRa(Long Range) 링크의 성능을 실증적으로 평가한다. 이를 위해 물리적인 성능 모니터링 시스템을 설계하고 구현하였으며, 이후 통신 실험 환경을 실내, 실외 기반으로 구성하였으며 설정 파라미터 및 거리에 따른 SNR(Signal to Noise Ratio), RSSI(Received Signal Strength Indication), PDR(Packet Delivery Ratio)의 성능을 평가하였다.

Keywords

Acknowledgement

Supported by : 한국연구재단

References

  1. SEMTECH Corporation(2015), "http://www.semtech.com/images/datasheet/an1200.22.pdf"
  2. Libelium(2016), "Waspmote LoRa 868MHz 915Mhz SX1272 Networking Guide"
  3. Juha Petajajarvi, Konstantin Mikhaylov, Antti Roivainen, Tuomo Hanninen(2015), "On the Coverage of LPWANs: Range Evaluation and Channel Attenuation Model for Lora technology," 14th ITST, pp. 55-59.
  4. Mohamed Aref, Axel Sikora (2014), "Free Space Range Measurements with Semtech LoRa Technology," 2nd IEEE International Symposium on Wireless Systems within the Conferences on Intelligent Data Acquisition and Advanced Computing Systems, pp. 19-23.
  5. Jaeyoung Jang, Seunggyu Byeon, Jongdeok Kim(2016), "Design and Implementation of Monitoring System for Analysis of Performance of LoRa," Korea Computer Congress 2016, pp. 318-310.

Cited by

  1. LoRa LPWAN Sensor Network for Real-Time Monitoring and It’s Control Method vol.31, pp.6, 2018, https://doi.org/10.7734/COSEIK.2018.31.6.359