• 한국통신학회논문지
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• 제28권6A호
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• pp.361-370
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• 2003

본 논문에서는 PNNI(Private Network to Network Interface) 기반의 무선 ATM 망에서 단말의 이동성을 보장하기 위해 기존의 위치 등록기 구조를 개선하고자 한다. 기존의 위치 등록기 구조는 위치 등록기를 물리적 계층으로 배치함으로 인해 다수의 데이터베이스가 요구되고, 데이터베이스 액세스 회수와 신호 트래픽 및 호 설정 지연 등이 증가하는 문제점을 갖고 있었다. 이 문제점을 보완하기 위해 본 논문에서는 논리적 계층 형태로 이루어진 위치 등록기 구조를 제시하고자 한다. 제안된 논리적 계층 구조에서는 위치 등록기를 논리적인 그룹으로 묶고, 이 그룹들을 다시 그룹으로 묶어서 위치 등록기의 논리적인 트리 형태로 만들어 상위 레벨의 위치 등록기의 역할을 하위 레벨의 위치 등록기 중 하나가 수행하도록 하고 있다. 기존의 위치 등록기 구조와 성능을 비교한 결과에서 제안된 논리적 계층 구조는 데이터베이스 수와 위치 관리비용 측면에서 우수한 성능을 보여주고 있다.

• Asia pacific journal of information systems
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• 제28권4호
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• pp.240-257
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• 2018

In today's turbulent business landscape, a firm's ability to explore new IT capabilities and exploit current ones is essential for enabling organizational agility and achieving high organizational performance. We propose IT exploration and exploitation as two critical organizational learning processes that are essential for gaining and sustaining competitive advantages. However, it remains unclear how the emerging cloud-based IT architecture affects an organization's ability to explore and exploit its IT capabilities. We conceptualize modularity and virtuality as two critical dimensions of emerging cloud-based IT architecture and investigate how they affect IT exploration and exploitation. We test our hypotheses using data obtained from our field survey of IT managers. We find that modularity is positively associated with both exploration and exploitation whereas virtuality is positively associated with exploration, but not with exploitation. We also find that the effect of modularity on exploitation is stronger than its effect on exploration.

• 한국전자거래학회지
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• 제8권4호
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• pp.223-238
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• 2003

본 논문에서는 정부전자문서유통센터의 EA 구축을 위해 EA 프레임웍의 방향성을 정의하고 이를 기반으로 GDOC 프레임웍을 제시하였다. 문서유통센터의 EA 구축으로 문서유통센터의 정보기술기반을 제공하여 정보시스템의 상호운용성 증진과 전자정부 과제간 상호운용성을 확보하고 정보자원을 일관성 있게 관리할 수 있도록 하였다. 정보화 정책결정 및 투자계획 수립을 지원하고 향후 행자부 EA 마스터 플랜을 수립하는데 적극 활용될 수 있도록 본 프로젝트의 산출물을 가시적인 시스템으로 운영하기 위하여 EA 레파지토리를 구축하였다.

• Journal of Communications and Networks
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• 제6권2호
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• pp.156-162
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• 2004

In recent years, mobile ad-hoc networks have received a great deal of attention in both academia and industry to provide anytime-anywhere networking services. As wireless networks are rapidly deployed, the security of wireless environment will be mandatory. In this paper, we describe a group key management architecture and key agreement protocols for secure communication in mobile ad-hoc wireless networks (MANETs) overseen by unmanned aerial vehicles (UAVs). We use implicitly certified public keys method, which alleviates the certificate overhead and improves computational efficiency. The architecture uses a two-layered key management approach where the group of nodes is divided into: 1) Cell groups consisting of ground nodes and 2) control groups consisting of cell group managers. The chief benefit of this approach is that the effects of a membership change are restricted to the single cell group.

• 정보화연구
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• 제11권3호
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• pp.271-283
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• 2014

정부는 공공기관의 자율 책임경영체계를 확립하기 위해 경영관리와 주요사업에 대해 경영실적을 평가하고 있다. 그리고 많은 공공기관이 전략과 IT의 정렬, 정보자원관리, IT 표준화 등을 위해 Enterprise Architecture를 구축 운영하고 있다. 경영평가와 EA 간에는 BSC 기반의 성과관리, PDCA에 기반을 둔 관리 개선 절차 등 많은 유사성이 있다. 본 논문은 두 제도 사이의 유사성과 연관성을 분석하고, 전략관리, 성과관리, 자원관리의 관점에서 경영평가에 EA를 적용하는 방안을 연구한다. 이를 통하여 EA의 활용을 확대하고, 공공기관이 체계적으로 경영평가를 준비하여 성과중심의 경영체계를 운영하는 방안을 제시한다.

• 산업경영시스템학회지
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• 제38권1호
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• pp.170-181
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• 2015

Generally, because individual agricultural product possesses its own distinctive characteristics and shows different characteristics at each stage of the agricultural supply chain, it is necessary to develop a proper enterprise architecture for managing information system. In this paper, we propose an enterprise architecture based on RFID/USN technology that can be used as a reference enterprise architecture for u-IT application in the agriculture sectors, which is called the u-Farm enterprise architecture with taking heterogeneous characteristics of agricultural products into account for. In addition, we also developed the RFID/USN middleware platform as a core infrastructure technology. Fo evaluation of the performance of the proposed u-Farm architecture and the RFID/USN middleware platform, the field-trial evaluation at the apple Agricultural Processing Center (APC) has been executed and the results shows that the proposed architecture and platform perform well in terms of information integration over the whole SCM process from the farming stage to delivering statge to the customers. It is expected that the proposed u-Farm enterprise architecture can be utilized as a standard information architecture, and the RFID/USN middleware platform can be a infrastructure platform for future u-IT based information technology applications and services in the agricultural environment.

• 한국산업융합학회 논문집
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• 제2권1호
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• pp.113-119
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• 1999

In order to accomplish either information system with future estimate or scientic management, application package of integrated detail management is required for Construction Company. The application package of integrated detail management is based on management of estimation, management of account. management of tax bill, management of on the spot, management of equipment and management of labor. This research focuses on the basic survey for this system such as circumstance of information system for construction company, a barrier of progress, development dirction, development article.

• 디지털산업정보학회논문지
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• 제10권3호
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• pp.171-179
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• 2014

Among the P2P based multimedia streaming architecture, multiple chain architecture has advantage in adapting to dynamically changing network topology simply and rapidly, so this architecture is used for UCC broadcasting system. In UCC broadcasting system, general peer involved in DSLAM becomes UCC server rather than broadcasting system that transfers data from ISP servers. Therefore UCC data generated from UCC server peers is transmitted to peers through DSLAM, and this transmission uses uplink bandwidth of DSLAM. In this paper, I propose an efficient management method of DSLAM uplink bandwidths through negotiating tracker and UCC server peer or head peers of DSLAM. I propose the method that tracker restricts a bitrate of uplink stream of UCC servers when used uplink bandwidth of DSLAM exceeds a certain point of maximum uplink bandwidths. I will show the improved performance of proposed scheme rather than general method with respect to the uplink bandwidth of DSLAM by numerical analysis and simulation.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 하계종합학술대회 논문집(1)
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• pp.109-112
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• 2002

SNMP is generally used protocol for network management. SNMP need MIB for exchanging management information But, method for sharing MIB is not automatic. General MIB sharing architecture is done by network management operator by manually. In this paper we describe exchanging MIB automatically using meta-MIB. We will formalize SMI as MIB structure. This meta MIB represent information about MIB of NE Agent. Meta MIB has Information of object in the MIB, Structure and index information fur columnar object, meaning of subtype at INTEGER syntax. Also, trap related information is represented too. In this paper, MIB information is represented as instance of meta MIB. This architecture will provide a method for automatic MIB exchanging

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2007년도 추계학술대회
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• pp.323-328
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• 2007

This paper introduces radio frequency identification(RFID) information technologies for item management such as application interface of data protocol, data encoding rules and logical memory functions for data protocol, and, unique identification for RF tags. This study presents reference architecture and definition of parameters to be standardized, various parameters for air intreface communications, and, application requirements profiles.