The Journal of the Korea institute of electronic communication sciences (한국전자통신학회논문지)

Korea Institute of Electronic Communication Science (한국전자통신학회)
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LoRa for LPWA Network: Overview and its Performance Enhancement Technologies

저전력광대역 네트워크를 위한 LoRa: 개요 및 성능향상 기술

  • Cho, Woong (Dept. Computer Engineering, Jungwon University)
  • 조웅 (중원대학교 컴퓨터공학과)
  • Received : 2019.02.18
  • Accepted : 2019.04.15
  • Published : 2019.04.30
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Abstract

LPWA (Low Power Wide Area) networks have been considered as one of the technologies which can be implemented in IoT (Internet of Things) applications by providing less power and longer communication range compared with existing wireless technologies. In this paper, we investigate LoRa which is one of representative technologies for LPWA networks. First, we present general properties and several technologies of LPWA networks. Then, the technical specification, properties, and pros/cons of LoRa are studied. Finally, we discuss analysis of LoRa's performance and its ehancement technologies by focusing on physical layer and MAC (Medium Access Control) layer.

저전력광대역 (LPWA: Low Power Wide Area) 네트워크는 기존의 무선통신 기술들에 비해 저전력으로 장거리 통신을 가능하게 하여 사물인터넷의 여러 응용분야에서 적용될 수 있는 기술 중 하나로 고려되고 있다. 본 논문에서는 저전력광대역 네트워크의 대표적인 기술 중 하나인 LoRa (Long Range)에 대해 알아본다. 먼저 저전력광대역 네트워크의 일반적인 특징 및 관련 기술에 대해 소개한다. 그리고 LoRa의 기술개요, 특징 및 장단점을 소개한다. 마지막으로 LoRa의 성능분석 및 성능을 향상시키기 위해 필요한 기술들을 물리계층과 매체 접근제어 계층에 중점을 두고 논의한다.

Keywords

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그림 1. 통신방식에 따른 데이터 전송률과 통신반경 Fig. 1 Data rate and communication range depending on communication scheme

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그림 2. LoRa 시스템 구조 Fig. 2 LoRa system architecture

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그림 3. LoRa 프로토콜 구조 Fig. 3 LoRa protocol architecture

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그림 4. LoRa 단말장치 전송방식 Fig. 4 LoRa end-device classes

표 1. LPWA 기술 특징 비교 Table 1. Comparison of LPWA technical characteristics

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