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학위논문
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문주성 (한국교통대학교, 한국교통대학교 일반대학원)

지도교수
김용호
발행연도
2022
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한국교통대학교 논문은 저작권에 의해 보호받습니다.

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이 논문의 연구 히스토리 (2)

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본 연구는 통신 기반 열차제어 시스템(Communications Based Train Control System, CBTC)의 안정성 향상을 위한 연구이다. 현재 사용하는 CBTC 시스템은 열차가 이동하면서 기존 AP와의 통신 연결을 끊고 다음 AP와 연결하는 Break-Before-Make 핸드오버 방식을 사용하고 있다. 이 과정에서, 열차가 다음 AP로 통신을 수립하는 과정에서 열차 제어정보 수신의 지연이 발생할 수 있으며, 이는 CBTC 시스템의 안정성을 해칠 우려가 있다. 본 연구의 목적은 통신 기반 열차 제어 시스템의 안정성 향상을 위해 IEEE 802.11be 차세대 다중 링크 무선랜 표준 및 IEEE 802.11v Wireless Network Management 표준 등을 기반으로 하고 있는 Wi-Fi Alliance의 EasyMesh 표준을 적용해 CBTC 시스템을 위한 새로운 Make-Before-Break 방식 핸드오버를 제안하는데 있다.
제안하는 시스템이 핸드오버 시 발생하는 지연을 기존 시스템에 비해 획기적으로 줄일 수 있음을 시뮬레이션을 통해 확인할 수 있다. 본 연구에서 제안하는 시스템을 미래 철도에 적용하면 상당한 CBTC 시스템 성능 향상을 가져올 것이라 기대된다.

목차

요 약 ··································································································· i
감사의 글 ································································································ ii
목 차 ································································································· iii
표 목 차 ·································································································· v
그림목차 ·································································································· v
I. 서론 ······································································ 1
1.1 연구 배경 및 목적 ······················································ 1
1.2 연구 내용 및 범위 ······················································ 2
II. 관련 연구 ······························································ 3
III. 기술적 배경 ·························································· 5
3.1 IEEE 802.11be 무선랜 표준 ··································· 5
3.2 Wi-Fi Alliance EasyMesh 규격 ···························· 7
3.3 CBTC 시스템 ······························································· 8
IV. 핸드오버 분석 ··················································· 10
4.1 기존 CBTC 핸드오버 방식 ···································· 10
4.2 제안하는 핸드오버 방식 ·········································· 12
4.3 제안하는 CBTC 핸드오버 방식의 장점 ·············· 16
V. 성능평가를 통한 CBTC 핸드오버 분석 ···· 17
5.1 성능평가를 위한 시뮬레이션 환경 ························ 17
5.2 기존 CBTC 시스템 성능평가 ································ 24
5.3 제안하는 CBTC 시스템 성능평가 ························ 27
5.4 성능평가 결과 비교 ·················································· 30
5.5 성능평가 결과 고찰 ·················································· 32
VI. 결 론 ······························································· 33
참고문헌 ·············································································· 34
Abstract ············································································· 38

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