• 인터넷정보학회논문지
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• 제9권4호
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• pp.79-84
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• 2008

정보통신환경의 빠른 변화에 따라서 정보자산의 효과적인 관리의 중요성이 강조되어지고 있다. 국내에서도 정보인프라에 대한 정보보호를 위해서 중요자산에 대한 위험분석 및 취약성 분석 강조되어지고 있다. 따라서 효과적인 자산분석을 위해 자산분류 체계화가 선행되어야 한다. 이에 따라, 본 논문에서는 기존의 연구내용들을 조사하여 자산분류를 체계화하고, 이를 토대로 객체지향 자산분류 모델을 제안한다.

• 디지털산업정보학회논문지
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• 제16권1호
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• pp.33-39
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• 2020

A smart grid is a next-generation power grid that can improve energy efficiency by applying information and communication technology to the general power grid. The smart grid makes it possible to exchange information about electricity production and consumption between electricity providers and consumers in real-time. Advanced metering infrastructure (AMI) is the core technology of the smart grid. The AMI provides two-way communication by installing a modem in an existing digital meter and typically include smart meters, data collection units, and meter data management systems. Because the AMI requires data collection units to control multiple smart meters, it is essential to ensure network availability under heavy network loads. If the load on the work done by the data collection unit is high, it is necessary to allocation new data collection units to ensure availability and improve energy efficiency. In this paper, we discuss the allocation scheme of data collection units for the energy efficiency of the AMI.

• 보건교육건강증진학회지
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• 제13권1호
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• pp.45-51
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• 1996

The Korea Information Infrastructure aims at the construction of an advanced national information infrastructure, consisting of communication networks, computers, databases and multimedia terminals. In the emerging information society, a well-established national information network plays a crucial role in enhancing economic efficiency and creating national wealth. Till 2015, government plans to construct an Information Superhighway Network and to provide a telecommunication service for speedy transmission of multi-media typed information and development of various applied programs, which help government's commitment to establish nationwide infrastructure to perform a leading role as a high level information society in the 21st century. In the field of health education, the research monograph contains three main parts: health education and information, acceptability of health education; development of health education management information system. In the most remote areas, it can bring high-quality health care where none is now available. In global health care, it can enhance and standardize the quality of medical care throughout the world. Before enlarging the establishment of the health education network system, the issues from this study should be considered to improve the health status through the introduction of information technology and applications in health care.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2015년도 추계학술대회
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• pp.211-215
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• 2015

자동차와 이동통신기술이 융합된 커넥티드 카 산업이 새로운 블루오션으로 주목받고 있고, 휴대용 전자기기(스마트폰, 태블릿 PC, MP3 플레이어 등)와 자동차를 연결한 각종 인포테인먼트(infotainment) 서비스들도 빠르게 성장하고 있다. 커낵티드 카란 자동차가 주변과 실시간으로 소통하며 운전자에게 안전과 편의를 제공한다는 개념으로 차량 연결성(Connectivity)을 강조하고 자동차에 사물인터넷(IoT)을 채용하여 플랫폼으로 활용, 현재는 실시간 내비게이션, 주차 보조기능, 원격차량제어 및 관리 서비스뿐만 아니라 e-Mail, 멀티미디어 스트리밍, SNS 등 엔터테인먼트 서비스를 지원하고 있다. 지능형 자동차 네트워크는 MANET(Mobile Ad Hoc Network)의 한 종류로 도로 상의 자동차들의 안전한 운행 및 운행 효율성 제고 등을 위해 연구되고 있다. 급변하는 운행 정보 제공을 위해 지능형 자동차 네트워크는 자동차와 자동차간의 통신(V2V, Vehicle to Vehicle), 자동차와 인프라스트럭처 간의 통신(V2I, Vehicle to Infrastructure), V2X(Vehicle to Nomadic) 등으로 구성된다.

• 전기학회논문지
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• 제64권3호
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• pp.365-369
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• 2015

In this paper, geographic information system(GIS) for an intelligent power distribution network was implemented with location informations acquired from automatic meter reading system, where the location informations of power line communication(PLC) modems installed at customer side were collected at data concentration units(DCUs) of headend equipment via PLC and then were transmitted to front end processor server. By displaying the connection status of the power distribution network on GIS map, operation of advanced metering infrastructure(AMI) or management of power grid system could be performed intuitionally and in real time, because the configuration state of the power grid could be easily monitored. The feasibility of the proposed system was confirmed with the especially constructed laboratory-level test bed and the verification test of the system will be carried out for a real power distribution network.

• 한국통신학회논문지
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• 제37권7C호
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• pp.584-591
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• 2012

Distributing a Certificate Revocation List (CRL) quickly to all vehicles in the system requires a very large number of road side units (RSUs) to be deployed. In reality, initial deployment stage of vehicle networks would be characterized by limited infrastructure as a result in very limited vehicle to infrastructure communication. However, every vehicle wants the most recent CRLs to protect itself from malicious users and malfunctioning equipments, as well as to increase the overall security of the vehicle networks. To address this challenge, we design and implement a nomadic device based CRL acquisition method using nomadic device's communication capability with cellular networks. When a vehicle could not directly communicate with nearby RSUs, the nomadic device acts as a security mediator to perform vehicle's security functions continuously through cellular networks. Therefore, even if RSUs are not deployed or sparsely deployed, vehicle's security threats could be minimized by receiving the most recent CRLs in a reasonable time.

• 대한임베디드공학회논문지
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• 제5권4호
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• pp.243-253
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• 2010

Multihop data delivery in vehicular ad hoc networks (VANETs) suffers from the fact that vehicles are highly mobile and inter-vehicle links are frequently disconnected. In such networks, for efficient multihop routing of road safety information (e.g. road accident and emergency message) to the area of interest, reliable communication and fast delivery with minimum delay are mandatory. In this paper, we propose a multihop vehicle-to-infrastructure routing protocol named Vertex-Based Predictive Greedy Routing (VPGR), which predicts a sequence of valid vertices (or junctions) from a source vehicle to fixed infrastructure (or a roadside unit) in the area of interest and, then, forwards data to the fixed infrastructure through the sequence of vertices in urban environments. The well known predictive directional greedy routing mechanism is used for data forwarding phase in VPGR. The proposed VPGR leverages the geographic position, velocity, direction and acceleration of vehicles for both the calculation of a sequence of valid vertices and the predictive directional greedy routing. Simulation results show significant performance improvement compared to conventional routing protocols in terms of packet delivery ratio, end-to-end delay and routing overhead.

• KSII Transactions on Internet and Information Systems (TIIS)
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• 제10권9호
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• pp.4123-4144
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• 2016

Vehicular Ad Hoc Networks (VANETs) utilize radio propagation models (RPMs) to predict path loss in vehicular environment. Modern urban vehicular environment contains road infrastructure units that include road tunnels, straight roads, curved roads flyovers and underpasses. Different RPMs were proposed in the past to predict path loss, but modern road infrastructure units especially flyovers and underpasses are neglected previously. Most of the existing RPMs are computationally complex and ignore some of the critical features such as impact of infrastructure units on the signal propagation and the effect of both static and moving radio obstacles on signal attenuation. Therefore, the existing RPMs are incapable of predicting path loss in flyovers and underpass accurately. This paper proposes an RPM to predict path loss for vehicular communication on flyovers and inside underpasses that considers both the static and moving radio obstacles while requiring only marginal overhead. The proposed RPM is validated based upon the field measurements in 5 GHz frequency band. A close agreement is found between the measured and predicted values of path loss.

• 한국정보통신학회:학술대회논문집
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• 한국해양정보통신학회 2001년도 춘계종합학술대회
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• pp.605-609
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• 2001

최근 정보화시대의 남한은 유.무선분야의 통신서비스 및 통신인프라에 있어 세계적 수준에 도달한 반면, 북한의 통신인프라는 기본적 전화수요조차 충족하지 못하는 남한의 '70년대와 유사한 낙후된 상황에 있다. 정보통신분문의 남북한 교류.협력은 경제, 사회 모든 분야에서 교류·협력의 중심부문으로서 남북통합의 기본토대를 마련한다는 점에서 매우 중요하다. 따라서 남북한 통합에 대비 통신망 구축을 위한 인프라로서 위성통신망은 망구축이 용이하고, 언제라도_ 남북한 전지역의 서비스가 가능하다는 장점을 가지고 있어 북한지역의 통신인프라구축에 있어 최적의 대안이 될 수 있다.

• 한국정보통신학회:학술대회논문집
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• 한국정보통신학회 2013년도 춘계학술대회
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• pp.1034-1037
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• 2013

정보통신기반시설은 국가 안전보장, 행정, 국방, 치안, 금융, 통신, 운용, 에너지 등의 업무와 관련된 전자적 제어 관리시스템 또는 정보통신망으로, 수자원분야는 국민의 편의와 안전에 중요한 수도 발전 댐관리 등을 전자적으로 수행할 수 있도록 제어시스템이 구축되어있다. 수자원분야는 또한 물관리 패러다임의 변화에 따라 제어시스템은 하나의 네트워크로 통합 관리되어 수계별로 유역통합물 관리가 실현되고 있다. 이러한 제어시스템은 다른 제어망, 업무망, 외부기관과의 연계등의 많은 보안상의 취약점을 노출하고 있고, 이에 대한 사이버테러는 사회 경제적으로 큰 혼란을 야기할 수 있으므로 제어시스템에 대한 보안의 중요성이 대두되고 있다. 본 논문에서는 정보통신기반시설 - 특히 댐 보 등 수자원분야의 제어시스템 보안대책에 대해 알아보고자 한다.