• Proceedings of the KIEE Conference
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• 2006.04b
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• pp.323-325
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• 2006

CBTC 시스템에서는 선로변에에 설치된 선로변무선기(Wayside Radio Set 이하, WKS)가 상호 무선통신을 수행하고, 각 WRS간의 거리를 항상 측정하고있도록 설계되었다. CBTC지상장치가 WRS간에서 측정된 WRS간 측정거리를 SRS에서 수신하고, log의서 기록한다. 기록한 로그를 이용하여 적정값을 판단한다. 본 시험에서는 WRS간의 무선통신에서 안정적인 측정 데이터가 취득되는지를 확인하였다.

• Proceedings of the KIEE Conference
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• 2005.10b
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• pp.481-483
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• 2005

There is change of signal control system for train control worldwide current. This is train control system that use radio communication and step practical use Tuesday. Research for diversified application, examination and enforcement is achieved in internal railroad industry by this. Therefore, do examination of universal train radio control way for internal application. Studied train control way that use suitable radio communication to internal railroad.

• Proceedings of the KIEE Conference
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• 2004.10a
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• pp.231-232
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• 2004

궤도회로를 사용하지 않고 무선통신을 이용하여 지상-차상간 정보를 송수신하고 열차속도를 제어하는 CBTC 시스템에서, 지상장치와 차상장치간의 열차속도 검지 및 열차제어에 필요한 정보교환을 최적화하기 위한 방안에 대하여 검토하였다. 국가연구개발사업으로 추진중인 경량전철 신호제어시스템 개발에 적용하여, 시스템 최적화를 통한 시스템 설계에 적용하였다.

• Proceedings of the KSR Conference
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• 2011.05a
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• pp.660-665
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• 2011

In this paper we investigated a variety of candidate trains in KORAIL and Seoul Metro Corp. for an experimental driving which would be in the prosecution of making functional and performance experimentation for the specified manual by this project. We examined many preliminary out-of-service trains and some kinds of spare trains to secure two composition of test-trains for CBTC evaluation and studied a remaking scheme to convert control vehicles of these trains to CBTC-functioned ones to choose a most suitable ones of them, so we will be make traveling tests on the test railroad with them.

• Proceedings of the KSR Conference
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• 2011.10a
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• pp.3104-3110
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• 2011

This paper describes how to ensure safety of train by guaranteeing stable and continuous communication in RF-CBTC. CBTC System uses the wireless communication between onboard and wayside so that safety of wireless communication is the most important. Losing the position of train causes vital problem of train service. By losing the position of train, the other trains are blocked in the block and the train move by emergency mode so headway and safety cannot guaranteed. Therefore, safety is ensured by redundancy of wireless equipment. One of the ways to make redundancy is redundancy of equipment. However, the redundancy of equipment spends a lot of money to avoid interference in limited place like underground. Continuous communication is guaranteed by means of redundancy of wireless communication coverage to solve the problems even though one of the equipment is broken.

• Proceedings of the KSR Conference
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• 2011.10a
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• pp.2726-2730
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• 2011

This paper proposes a CBTC wayside signaling system, which redeems existing track-circuit-based ones by using movement authorities mixed with logical block and moving block. Only one train can be entered into the logical block or the route for existing wayside signaling system. Applying moving block for CBTC system enables the train to get nearer to the preceding one, because its protection mechanism uses train's safe boundary, not fixed block unit. By narrowing the existing route set to switch machine and applying the moving block beyond that area, more than one train can enter into one route area. This paper shows that the efficient train control, i.e. shortening the headway, is possible using the moving block mixed with logical block in wayside signaling system.

• Proceedings of the KIEE Conference
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• 2011.07a
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• pp.85-86
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• 2011

철도운영효율 향상을 위하여 첨단 기술을 기반으로 하는 스마트 철도 기술에 대한 개발 및 실용화 사업이 전 세계적으로 진행중에 있다. 철도의 수송력 증대와 운영비용 감소 및 시스템 변경 용이성등의 장점을 극대화하기 위하여 기존의 궤도회로 중심의 열차제어 시스템에서 통신기술을 기반으로 하는 열차제어시스템으로의 전환을 위한 많은 연구가 이루어지고 있다. 본 논문에서는 CBTC 시스템에서 GPS시스템의 적용 타당성 여부를 검증하였고 CBTC 시스템에서의 위치 정보 수신을 위한 GPS 수신데이터의 정합 알고리듬에 관한 저전력 분할 연산 알고리듬을 설계하여, 본 논문에서 제안한 코드는 기존의 수신데이터의 정합알고리듬 대비 2% 면적이 감소하는 것을 확인할 수 있었으며, 또한 전력소모가 7% 감소되는 것을 확인할 수 있었다.

• Proceedings of the KSR Conference
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• 2007.11a
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• pp.629-632
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• 2007

Communications Based Train Control(CBTC) is a continuous, automatic train control system utilizing high-resolution, train location determination independent of track circuits; continuous, high capacity, bi-directional train-to-wayside data communications; and trainborne and wayside processors capable of implementing vital functions. In this paper, we present a basic design of CBTC system based on ERTMS/ETCS specifications. The basic design is composed of system requirements analysis, system functional analysis, system architectural design, sub-system requirements analysis, sub-system functional analysis. Each deliverable has been produced according to a development process based on UML/SysML.

• Journal of the Korean Society for Railway
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• v.6 no.1
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• pp.1-9
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• 2003

This article proposes an integrated systems engineering and safety analysis model for safety-critical systems development. A methodology in system design for safety is considered during the early phase of the development life cycle of systems engineering process. The evolution of the design automation technology has enabled engineers to perform the model-based systems engineering. A Computer-Aided Systems Engineering(CASE) tool, CORE, is utilized to integrate the systems engineering model with a system safety analysis model. The results of the functional analysis phase can drive the analysis of the system safety. An example of Communications-Based Train Control(CBTC) system for an Automated Guided Transit(AGT) system demonstrated an application of the integrated model.

• Proceedings of the KSR Conference
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• 2004.10a
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• pp.1199-1204
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• 2004

In this paper, the DCS (Data Communication System) which is a main part of CBTC (Communication Based Train Control) system is consisted of radio based wireless communication system and optical based wired system. In the radio based wireless communication, the location of AP(Access Point) Enclosure and Antenna shall be optimized for the guaranteed communication channel between wayside and trains either open aired or tunnelled area. This study is introducing the way of determinating optimized positioning the radio based wireless communication equipment in Bundang Line. At this moment, this CBTC project for the KNR's (Korea National Railway) intelligent train control system are in installment phase therefore the simulation data can show only from lab equipment. After the phase I testing, more detailed data can be collected and advanced paper will be issued in a short time.