• Title, Summary, Keyword: Signalling System

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A Change and Perspective of International Telephone Signalling System of Korea and World Main Countries (한국및 세계주요국에서의 국제전화 신호방식의 변천과 전망)

  • 조규심
    • Journal of the Korean Professional Engineers Association
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    • v.23 no.1
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    • pp.49-63
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    • 1990
  • A signalling system generally designates electrical conditions and transmissionㆍreceiving programs of exchange control use signals concerning the establishmentㆍreleaseㆍtariff etc of calls between telephone subscribers and an exchange office or inter-exchange offices. In signalling system, different systems are being used according as communication service for control. With the development of exchange and transmission technique and higher functional advance, there exist many kinds of signalling systems. As for the signalling system used in international communication, an international standardization is specially important for the exchange of each country to operate properly and execute a smooth exchange connection. A term "signalling system" is chiefly used in telephone exchange system, while in telex exchange system "signalling condition, " and in data exchange system "protocol" is used. "protocol" is used.; is used.

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Expanding Plan Study of KRTCS-2(Korean Radio Train Control System for Conventional & High Speed Railway) (일반 및 고속철도용 한국형열차제어시스템 확대적용 방안 연구)

  • Lee, Kang-Gyoo;Choi, Jong-gwoan;Sung, Dong-Il;Yun, Hak-Sun;Park, Jong-Won;Kim, You-Ho;Lee, Nam-Hyoung;Yoo, Jong-Cheon
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.66 no.3
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    • pp.533-539
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    • 2017
  • ERTMS/ETCS Level 2 is currently planning, making contract, constructing and operating at several lines in European well-developed railway countries different from past ten years ago, and applying extensively for purpose of its intercompatibility and operational efficiency, and economic feasibility. On the other hand, ATP system correspond to ETCS Level 1, which was domestically introduced in early 2000, has introduced, operated, and planned or constructed in national railwaynetwork, but the lines, which its improvement period is come, are being occurred starting Gyeongbu Line. Therefore, we study the consideration and construction plan by stages if LTE-R Korean Radio-based Train Control System for conventional & high-speed railway under domestic development is extensively applied as the third National Railway Network Construction Plan was announced.

Analysis of Safety Assessment Activities for Railway Signalling System (열차제어시스템 안전성 평가 업무 분석)

  • Hwang, Jong-Gyu;Jo, Hyun-Jeong;Yoon, Yong-Ki
    • Proceedings of the KIEE Conference
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    • pp.1197-1198
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    • 2007
  • According to the computerization of railway signalling systems, the safety demonstration and assessment of railway signalling system is very important. For this reason, railway signalling systems reflect the needs of methodology to assessment the safety. Then many studies of safety assessment methodology for railway signalling systems centering on the Europe, have been made continuously, and the requirements for safety acceptance are currently standardized by IEC. To develop and establish the safety assessment technology for railway signalling system in Korea, we are reviews the safety assessment activities for signalling system through the reviews of related std., case study and consulting by experts.

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A consideration of signalling system switchover at installation of new train control system (새로운 열차제어시스템 도입시에 신호시스템 절체 방안에 관한 고찰)

  • Cho, Bong-Kwan
    • Proceedings of the KIEE Conference
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    • pp.283-285
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    • 2003
  • Metro is taking an important part as a public transportation of densely populated area. but according to request of increasing transportation demand and improving service for passengers, minimizing headway, functional improvement of safety facility, improving riding comfort are needed. Also, it is the time for Seoul metro's signalling system to be improved into a new one as it has been opened to traffic for over 20 years and its signalling system is becoming superannuated. this paper reviewed the considerations at improving a signalling system and its solution.

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Formal Method for Operational Regulations to Railway Signalling System (철도신호시스템 운용규정에 Formal Method의 적용)

  • Kim, He-Eung;Lee, Jong-Woo
    • Proceedings of the KSR Conference
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    • pp.856-862
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    • 2006
  • In railway signalling system, there are several kinds of signal system such as signals, signs, marker. The signals allows train to go or not, the signs permit to communicate between railway men, and the marks indicate status of railway lines. In KNR, the application of the signal systems are defined in railway operational regulations, operational related regulation, Operation safety critical system manipulation manual, and so on. In this paper, we extracted regulations for signalling system operation from related regulations, reviewed compatibility and contradiction for signalling system operations. We tried to check logical integrity of informal signalling operation regulation using formal method.

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Testing method analysis for performance verification in Light Rail Transit signalling system (LRT 신호시스템에서 성능검증을 위한 시험방법 분석)

  • Cho, B.K.;Hwang, H.C.;Lee, H.Y.;Ryu, S.H.
    • Proceedings of the KSR Conference
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    • pp.1722-1728
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    • 2007
  • This study analysed testing method for performance verification in the phase of signalling system development for application in the Light Rail Transit(LRT). The main focus in this study therefore includes development of vehicle location detection system by first GPS and analysis of performance verification method by field testing. The comprehensive testing method has been analysed for the signalling system for LRT high speed operation. The signalling system for LRT high speed operation deals with vehicle location identification through vehicle location information using the second GPS and decision for whether the high speed proceed signal and departure inhibition output is feasible or not and for signalling output to the corresponding vehicle.

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Protocol Design for Bus Network Communication between Onboard Signalling System and MMI (차상신호장치와 MMI간 버스형 네트워크 통신프로토콜 설계)

  • Kim, Seok-Heon;Han, Jae-Mun;Jung, Ji-Chan;Cho, Yong-Gee
    • Proceedings of the KSR Conference
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    • pp.2782-2786
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    • 2011
  • In this paper a protocol design for bus network communication between onboard signalling system and MMI(Man Machine Interface) will be presented and illustrated. Recently, many onboard signailling systems adopt hot standby for safety reasons. Hot standby is a method of redundancy in which the primary and secondary systems run simultaneously. It is convenient to use bus network(bus topology) in a hot standby system for communication between onboard signalling system and MMI. Because bus network is the simplest way to connect multiple clients such as onboard signalling system, MMI and etc. However, there are many problems when two clients want to transmit at the same time on the same bus. A effective protocol is necessary to solve that problems. We will describes protocol design which is useful when onboard signalling systems and MMIs are connected via RS485(Bus Network).

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System Engineering for Development of Train Control System (열차제어시스템 개발에 있어서의 시스템 엔지니어링)

  • Lee, J.W.;Joung, E.J.;Hwang, J.G.
    • Proceedings of the KIEE Conference
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    • pp.381-383
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    • 2001
  • A system engineering play a key role in new signalling system development. The signalling system development process consists several phases which are requirement analysis, functional analysis, system synthesis and system analysis. Each phase of the development are decomposed according to system engineering process. The key topics to be considered are shown in the each phase such as safety. This paper shows the application of system engineering process to a signalling system development.

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A Study on a CAD System Development for Interlocking Signalling Chart (연동도표작성용 CAD 시스템 개발)

  • Lee, Jong-Woo;Joung, Eui-Jin;Hwang, Jong-Gyu;Shin, Duck-Ho
    • Proceedings of the KIEE Conference
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    • pp.1267-1271
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    • 2002
  • Interlocking signalling chart must have no error and ensures a high availability for train operation. Interlocking signalling chart creation needs expert who has much experience to avoid errors, which can provoke some accidents. The CAD system for interlocking signalling chart can replace the expert because it can create the signalling chart without any errors if the creation logic being correct. We have developed the CAD system, present the basic algorithm in this paper.

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Performance comparison of application signalling protocol on B-ISDN bearer connection types (B-ISDN 베어러 연결 형태에 따른 응용 신호 프로토콜의 성능 비교)

  • 이성근;유상신;김덕진
    • Journal of the Korean Institute of Telematics and Electronics A
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    • v.33A no.5
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    • pp.44-54
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    • 1996
  • Various types of B-ISDN bearer connection can take place according to access types of endpoint equipments in call and number of connectio between endpoints. In this paper, performance of application signalling protocol on three basic facilities of B-ISDN CS-2 signalling system, such as connection of point-to-point, point-to-multipoint and multiconnection call, is evaluated and compared. For performacne evaluation, experimental model of B-ISDN application signalling protocol is implemented and respective message processing time of each process is measured. By applying message processing time to local exchange system, cal processing capacity of application signalling protocol on three basic connection types is evaluated by simulation method. In this paper, local exchange system is considered to have two ATM NNI links and four ATM UNI links.

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