• Journal of the Korean Institute of Navigation
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• v.20 no.4
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• pp.111-128
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• 1996

This paper is focused on the desirable improvement schemes of the local network of information and telecommunication network. In this study, we examined whether polices of information and telecommunication of government have been carried out a desirable programme to meet the public interest, found out several problems in the these policies. Such problems as follows : (1) a system of local information & telecommunication is developing by a Model of Top-Down. In the present management system, an interest of the public of local society about the local telecommunication network is a much lower level, (2) there is no general controlling roll of the local information & telecommunication, (3) there is no service controlling system of local telecommuni-cation, and (4) there is no organic coordinating system of inter-departments in the central government level. In order to resolve these problems, this study suggests a few desirable sxhemes for the local telecommunication : (1) an establishment of middle-long range planning for the integrated future network of info-telecommunication, (2) an organizing of telecommunication network being suitable for the local characteristics toward B-ISDN.

• Proceedings of the IEEK Conference
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• 1998.10a
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• pp.39-42
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• 1998

In this paper is design of signal discriminatior system for the third generation mobile telecommunication system (IMT-2000 : International mobile telecommunication service-2000) This system is basically using multiplexing method of CDMA, TDMA and FDMA that this system can be solved third generation systems problems-Frequency bandwidth, international roaming and development new architecture of mobile telecommunication systems. Designed signal discriminator system is perfectly separated three styles multiplexing method signals that more easily, nearly and economically implementation of third generation telecommunication systems. As we develop signal discriminator we will contribute to technical evolution of mobile telecommunication for third generation and stay ahead in the interior technical accumulation in addition to international intercourse as to mobile telecommunication.

• Proceedings of the SAREK Conference
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• 2006.06a
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• pp.489-494
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• 2006

Electronic and telecommunication industries are constantly trying to develop compact components having high power density. Therefore, a proper heat dissipation method is very important to allow reliable operation of the telecommunication equipment. In this study, a hybrid refrigeration system for a telecommunication equipment room was designed to save energy consumption and improve reliability of the compressor In addition, the performance of the hybrid refrigeration system was measured with a variation of outdoor load. The designed hybrid refrigeration system for the telecommunication equipment shelter saved the energy approximately 50%e at the mode switch temperature of $8.3^{\circ}C$.

• Proceedings of the KIEE Conference
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• 1997.07b
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• pp.603-605
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• 1997

The systematic and efficient operation of telecommunication power equipments is very important to the safe operation of telecommunication system. To achive that, Korea Telecom has developed a new centralized management system for telecommunication power equipments. The system configuration and main functions for the new developed system are described in this paper.

• Journal of Korea Spatial Information System Society
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• v.4 no.2 s.8
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• pp.23-34
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• 2002

Various tries are in progress to expand the usability of wireless telecommunication harminized internet technology. The most typical example among those services is LBS(Location Based Service). Nowaday, Standards for telecommunication system of LBS centers round on 3GPP(3rd Generation Partnership Project) and 3GPP2. In this paper we compare the telecommunication system of 3GPP and 3GPP2 in order to make domestic standards of telecommunication system to provide LBS. First, we investigate network models and interfaces of GSM(Global System for Mobile) and ANSI(America National Standard Institute)-41/PCS1900 - Telecommunication type of 2nd generation. Also we consider those of UMTS (Universal Mobile Telecommunication System) and cdma2000 - Telecommunication type of 3nd generation. Then we analysis function components for LBS of each network models details.

• Proceedings of the KIEE Conference
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• 1987.07b
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• pp.907-910
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• 1987

This paper describes the design and implementation of M10CN software management system which manages the current state of M10CN software. This system provides the fast search of information in the software and the exact state of the software in the M10CN exchange.

• Korean Journal of Air-Conditioning and Refrigeration Engineering
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• v.11 no.5
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• pp.669-683
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• 1999

Heat dissipation in the domestic switching room has been gradually increased. Therefore, numerical study on the cooling characteristics of the telecommunication system in a switching room for three kinds of the air supply and return flow system was investigated to develop effective flow system. As a result, the cooling performance of the under floor air supply and overhead return flow system was the best.

• Proceedings of the KIEE Conference
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• 1993.07a
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• pp.470-472
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• 1993

Nowadays, according to gradual progress of the information oriented society, it is being increase rapidly that social requirement for the high quality and stability of electric power supply. Therefore, for the sake of expansion of the various power system and reasonable operation and administration, there are some growing need for telecommunication system that will operate in high dependability performance and expansion by much. But beause of unestablished reliability analysis and evaluation methodology for power telecommunication system, it could not have a reasonable planning for the purpose of improving dependability performance on telecommunication system. The object of this study is to construct reasonable methodology of reliability evaluation fur the efficient power telecommunication facility administration.

• Proceedings of the KIEE Conference
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• 2003.07d
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• pp.2600-2602
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• 2003

오늘날의 사회는 디지털 기술기반에 의해 가속화되는 새로운 사회적, 경제적 경험의 세계로 움직이고 있다. 그 결과로서, 과거 어느 때 보다도 전력시스템, 인터넷, 통신망 등 복잡하고, 상호작용적인 네트워크의 원활한 기능에 전적으로 의존되어 가고 있고, 이러한 상황은 네트워크에 전례 없는 품질과 안정성을 부각시켰다. 또한 디지털 기기의 확산과 디지털 산업의 성장에 따른 고품질의 전력요구, 전력수급의 유형 변화, 소비자 생활양식의 변모 등에 의해 과거와는 다른 새로운 전력 시스템을 요구하고 있다. 이를 위해서는 Electricity Network와 IT Network와의 결합을 바탕으로 다단계의 지능적인 제어 능력을 보유한 전력 Super Highway가 필요하다. 본 논문은 디지털 시대를 대비한 해외의 신 전력시스템 개발 현황 및 이를 뒷받침하기 위한 네트워크 구축 방안들을 살펴보고, 이를 통해 현재 우리나라의 전력시스템 환경에서 필요한 요구조건과 가능한 네트워크 구축 방안에 대하여 살펴본다.

• Proceedings of the KIEE Conference
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• 2004.11c
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• pp.107-109
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• 2004

In this paper, authors propose the sensor fusion system that can recognize multiple 3D objects from 2D projection images and tactile information. The proposed system focuses on improving recognition performance of 3D object. Unlike the conventional object recognition system that uses image sensor alone, the proposed method uses tactual sensors in addition to visual sensor. Neural network is used to fuse these informations. Tactual signals are obtained from the reaction force by the pressure sensors at the fingertips when unknown objects are grasped by four-fingered robot hand. The experiment evaluates the recognition rate and the number of teaming iterations of various objects. The merits of the proposed systems are not only the high performance of the learning ability but also the reliability of the system with tactual information for recognizing various objects even though visual information has a defect. The experimental results show that the proposed system can improve recognition rate and reduce learning time. These results verify the effectiveness of the proposed sensor fusion system as recognition scheme of 3D object.