The Journal of the Convergence on Culture Technology (문화기술의 융합)

The International Promotion Agency of Culture Technology (국제문화기술진흥원)
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LTE-Cat.M1 Conformity Test in Sounding Rocket Communication Systems

Sounding Rocket 통신 시스템에서의 LTE-Cat.M1 사용 적합성 시험

  • 이승환 (한국교통대학교 전자공학과) ;
  • 김태훈 (한국교통대학교 항공기계설계학과) ;
  • 김혜민 (한국교통대학교 항공기계설계학과) ;
  • 김다완 (한국교통대학교 전자공학과)
  • Received : 2024.04.20
  • Accepted : 2024.06.10
  • Published : 2024.07.31
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Abstract

In this paper, we introduce the results of the Sounding Rocket LTE communication test using the LTE-Cat.M1 module. The developed LTE data transmission/reception system consists of Mission-Mounted Equipment(Payload) and Ground Observation Equipment(GOE), and the delay rate was secured based on the time between data measured when received from the GOE by constantly transmitting data from the Payload at a speed of 10 Hz. In order to increase the accuracy of the actual flight test, ground network delay rate tests, hardware internal delay rate tests, and ground tests were performed. As a result of the flight test, it was confirmed that the handover failed in the upward phase and the communication was lost for 13 seconds, and then the parachute was deployed and the communication was reconnected in a situation with a constant positional displacement. LTE-Cat.M1 technology is expected to be utilized for descent phase observation missions or data backup during Sounding Rocket missions.

본 연구는 LTE-Cat.M1 모듈을 사용하여 Sounding Rocket LTE 통신 시험 결과를 소개한다. 개발된 LTE 데이터 송수신 시스템은 임무탑재장비와 지상관측장비로 구성되며, 10 Hz의 속도로 일정하게 임무탑재장비로부터 데이터를 송신하여 지상관측장비에서 수신 시 계측되는 데이터 사이 시간을 바탕으로 지연율을 확보하였다. 실제 비행시험의 정확도를 높이기 위하여 지상 네트워크 지연율 시험과 하드웨어 내부 지연율 시험, 지상 시험을 수행하였다. 비행 시험 결과 상승 단계에서 핸드오버에 실패하여 13초간 통신이 유실되었음을 확인하였고, 이후 낙하산이 전개되어 일정한 위치 변위를 가진 상황에서 통신이 다시 연결됨을 확인하였다. 최종적으로 LTE-Cat.M1 기술은 Sounding Rocket 임무 중 하강 단계 관측 임무나 데이터 백업에 사용할 수 있을 것으로 기대한다.

Keywords

Acknowledgement

이 논문은 2024년도 한국교통대학교의 교내 학술연구비의 지원을 받아 수행한 연구임.

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