A Study on Resolving Shadow Area of LoRa-based Communication for Workplace Safety

doi:10.15683/kosdi.2020.06.30.402

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2020 Vol.16, Issue 2 Preview Page Next Page

Original Article

A Study on Resolving Shadow Area of LoRa-based Communication for Workplace Safety 작업현장의 안전을 위한 LoRa기반 통신의 음영지역 해소를 위한 연구: 김승용¹ㆍ김동식²ㆍ황인철²ㆍ김경수⁴ㆍ김경용⁵*
Seungyong Kim¹, Dongsik Kim², Incheol Hwang³, Kyoungsoo Kim⁴, Gyoungyong Kim⁵*; ¹Professor, Department of Management Information System, Korea National University of Transportation, Chungju, Republic of Korea
²Director, KCC Engineering & Construction Co., Ltd., Seoul, Republic of Korea
³Director, Secuware Inc., Cheongju, Republic of Korea
⁴Doctor Course, Department of Construction Safety Engineering, Kyonggi University, Suwon, Republic of Korea
⁵Professor, Department of Paramedic Science, Korea National University of Transportation, Jeungpyeong, Republic of Korea

30 June 2020. pp. 402-410

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Abstract

Purpose: The purpose of this research is to eliminate communication shadowing loss of the ‘smart safety management system’. The ‘smart safety management system’ can monitor and relay real time data of workers working in high risk workplace (i.e: industrial scene, disaster scene). The data will provide the rescue team the ‘golden hour’ in their rescue operations. Method: In this research, safety tag was designed and implemented so that it acts as a repeater for the user. Result: In other words, when communication in-between the safety tag and headquarters’ communication terminal is jeopardized, the safety tag will act as a repeater-terminal for other safety tags in the area. Conclusion: The research tested if a specific building with communication shadowing loss problem was resolved when safety tags were implemented. Communication shadowing was first identified in-between the safety tag and headquarters’ communication terminal. When extra safety tags were deployed in the same situation, the results showed that the communication shadowing loss was resolved. The repeater safety tags could resolve communication shadowing loss of up to three basement levels in this test building.

Keywords

Communication Shadowing

LoRa Communication Theory

Repeater

Safety Tags

High Risk Workplace

연구목적: 본 연구의 목적은 ‘스마트 안전관리 시스템’의 통신 음영지역을 해소하는 것이다. ‘스마트 안전관리 시스템’은 고위험 작업장(산업현장, 재난현장)에서 일하는 근로자의 실시간 데이터를 모니터링하고 중계할 수 있다. 데이터는 구조팀에게 구조작업 시 ‘골든 타임’을 제공한다. 연구방법: 이 연구에서 안전 태그는 사용자의 중계기 역할을 하도록 설계 및 구현되었다. 연구결과: 다시 말해, 안전 태그와 지휘부의 통신 구간에서 통신 음영이 생길 경우, 안전 태그는 해당 지역의 다른 안전 태그에 대한 중계기 역할을 한다. 결론: 이 연구는 개발한 안전 태그가 통신 음영지역이 있는 특정 건물에서 통신두절 문제가 해소되는지 테스트했다. 먼저, 안전 태그와 지휘부 단말기 사이에서 통신 음영지역을 확인했다. 동일한 상황에서 추가 안전 태그를 배포한 결과 통신 음영지역이 해소된 것으로 나타났다. 중계기 역할을 하는 안전 태그는 테스트 빌딩에서 최대 지하 3층 까지 통신 음영지역을 해소할 수 있었다.

키워드

통신음영

LoRa통신이론

중계

안전 태그

고위험 작업장

References

e-National Index (2017). Firefighters Status
Kim, M.J., Kim D.Y., Lee M.S. (2016) "The study on the functions for design and development of Public institutions Disaster mitigation management and support system." Journal of The Korean Society of Disaster Information, Vol.12, No. 1, pp. 32-39.10.15683/kosdi.2016.3.31.32
Korean Statistical Information Service (2017). Industrial accident statistics
Korean Statistical Information Service (2018). Five-year casualty figures for firefighters
Korean Statistical Information Service (2018). Social Survey (Family, Education, Health, Safety and Environment)
Lee, D.H., Lee, W.J., Park, H.S., Ko, D.S. (2019). "A study on the improved transmission distance of the LoRa network." Journal of KIIT, Vol. 17, No. 4, pp. 53-59.10.14801/jkiit.2019.17.4.53
Lim, J.Y., Lee, J.M., Kim, D.H., Kim, J.d. (2017). "Performance analysis of LoRa (long range) according to the distances in indoor and outdoor spaces." Journal of KIISE, Vol. 44, No. 7, pp. 733-741.10.5626/JOK.2017.44.7.733

Information

Publisher :The Korean Society of Disaster Information
Publisher(Ko) :한국재난정보학회
Journal Title :Journal of the Society of Disaster Information
Journal Title(Ko) :한국재난정보학회논문집
Volume : 16
No :2
Pages :402-410
DOI :https://doi.org/10.15683/kosdi.2020.06.30.402

[1] e-National Index (2017). Firefighters Status

[2] Kim, M.J., Kim D.Y., Lee M.S. (2016) "The study on the functions for design and development of Public institutions Disaster mitigation management and support system." Journal of The Korean Society of Disaster Information, Vol.12, No. 1, pp. 32-39.10.15683/kosdi.2016.3.31.32

[3] Korean Statistical Information Service (2017). Industrial accident statistics

[4] Korean Statistical Information Service (2018). Five-year casualty figures for firefighters

[5] Korean Statistical Information Service (2018). Social Survey (Family, Education, Health, Safety and Environment)

[6] Lee, D.H., Lee, W.J., Park, H.S., Ko, D.S. (2019). "A study on the improved transmission distance of the LoRa network." Journal of KIIT, Vol. 17, No. 4, pp. 53-59.10.14801/jkiit.2019.17.4.53

[7] Lim, J.Y., Lee, J.M., Kim, D.H., Kim, J.d. (2017). "Performance analysis of LoRa (long range) according to the distances in indoor and outdoor spaces." Journal of KIISE, Vol. 44, No. 7, pp. 733-741.10.5626/JOK.2017.44.7.733

Journal of the Society of Disaster Information ISSN:1976-2208(Print) 2671-5287(Online) 한국재난정보학회논문집

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