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대구도시철도 1호선 전동차 ATP/ATO System 개량 연구
박주열(J. Y. Park),김효상(H. S. Kim),진병삼(B. S. Jin),박재완(J. Y. Park),김봉택(B. T. Kim),이준환(J. H. Lee) 한국도시철도학회 2015 한국도시철도학회논문집 Vol.3 No.2
On-Board Signaling equipment for the rail car is similar as a nerve network of human body which needs high reliability and stability. Daegu metro line 1 was opened to the public on July 1997 and it is providing reliable and stable large-scale transportation for the Daegu citizens up to the present. But, for 18 years of long operation, equipments are being obsolete and it is now facing several problems on maintaining and repairing the product because spare parts of the equipments are no longer manufactured. Specially, ATP/ATO train signaling equipments of Daegu metro line 1 needs to have continuous support and functional upgrade because of relatively long runtime and unstable running environment which is different from ground signaling equipment. In this paper we have improved the difficulties of analysing and preventing recurrence of malfunction on the ordinary train signaling equipment which is unable to save and view the processing information data because limitations of circuit organization and usage of supplier"s hardware & software
예충일,김은아,이경석,김지형,문성현,김철순,이정훈,김민현,이준환,Yeh, C.I.,Kim, E.A.,Lee, K.S.,Kim, J.H.,Moon, S.H.,Kim, C.S.,Lee, J.H.,Kim, M.H.,Lee, J.H. 한국전자통신연구원 2016 전자통신동향분석 Vol.31 No.5
현재 이동통신 분야에서는 5세대(5th Generation: 5G) 이동통신 표준화 작업이 한창 진행 중이며, 그 표준화 현황을 살펴보기 위하여 대표적인 국제 표준화 단체인 ITU-R에서의 활동 및 3GPP에서의 활동을 살펴보고자 한다. 최근 ITU-R WP 5D에서는 IMT-2020으로 명명되는 5세대 이동통신 비전 문서를 토대로 기술 요구사항 및 평가 기준 마련을 위한 작업이 수행되고 있으며, 3GPP의 TSG SA, RAN 및 하위 WG에서는 관련 상위 레벨 요구사항 정립 및 무선 구간에서의 기술적인 SI 논의가 수행되고 있다. 본고에서는 위 두 표준화 활동을 위주로 5G 이동통신에 대한 현황을 기술한다.
이승규,이준환,이문식,S.Q. Lee,J.H. Lee,M.S. Lee 한국전자통신연구원 2024 전자통신동향분석 Vol.39 No.1
Virtualization technology supports the execution of software unrelated to the hardware environment through the decoupling of software and hardware. Additionally, it enables network slicing, allowing one physical device to be divided and used by a function or service by supporting sharing with isolation. Virtualization enables flexible platform use, allowing a variety of services to be launched without changes or additions to the hardware platform. We describe virtualization technology trends in satellite/mobile communication systems. Basic concepts and technical definitions are included, and the current status of research and development by domestic and foreign organizations, including the Electronics and Telecommunications Research Institute, is analyzed. Finally, future prospects and implications are discussed.