• 대한임베디드공학회논문지
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• 제11권1호
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• pp.9-14
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• 2016

Since Devices such labtop, tablet, smartphone have been developed, a lots of huge data that can be classified as content is flooded in the network. According to changing Internet usage, Content-Centric Network(CCN) what is new concept of Internet Architecture is appeared. Initially, CCN is studied on wired network. but recently, CCN is also studied on wireless network. Since a characteristic of wireless environment is different from a characteristic of wired environment, There are issues in wireless CCN. In this paper, we discuss improvement method of Data spread issue on wireless CCN. The proposed scheme of this paper use MAC Address of nodes when Interest and Data Packet are forwarded. As using the proposed scheme, we reduce the spread of Data and offer priority of forwarding to nodes of shortest path, reduce delay by modifying retransmission waiting time.

• 디지털콘텐츠학회 논문지
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• 제9권1호
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• pp.33-39
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• 2008

Ad Hoc Network는 인프라스트럭처 기반의 네트워크가 아니고 노드들이 분포되어 있기 때문에 공격을 받기가 쉽다. 침입탐지시스템은 다른 노드들의 신뢰 수준을 감지하고 노드의 로컬 보안에 대한 검사와 감시 능력을 제공한다. 본 논문에서는 침입 탐지를 하는데 오버헤드를 줄이기 위해 클러스터링 기법을 적용하였다. 그리고 노드들 간의 신뢰도를 측정하기 위해 클러스터 헤드가 멤버 노드로부터 받은 신뢰 정보와 자신의 정보를 조합하여 다른 노드의 신뢰도를 평가한다. 이렇게 함으로써 네트워크내의 노드들의 대한 인증을 정확하게 수행할 수 있게 되어 안전한 데이터 전송을 제공하게 된다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2005년도 추계학술대회 논문집 전력기술부문
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• pp.171-173
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• 2005

To date, the IEA DSM Programme has not undertaken any work on the potential for DSM to cost-effectively relieve electricity network constraints Such constraints are becoming a significant problem in countries where electricity demand is increasing and network infrastructure ('poles and wires') is ageing. As loads grow and infrastructure reaches the end of its economic life, the potential cost of augmenting electricity networks is increasing exponentially. In many situations, network-driven DSM can delay the need for network augmentation. In some limited situations, mainly at the distribution level, network-driven DSM may be able to cost-effectively eliminate the requirement to build a 'poles and wires' solution. In this paper, the concept of network-driven DSM program is surveyed.

• 한국정밀공학회:학술대회논문집
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• 한국정밀공학회 2001년도 춘계학술대회 논문집
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• pp.582-585
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• 2001

Requirements for device networks differ greatly from those of data(business) networks. Consequently, any control network technology which uses a fieldbus protocol is, in general, different from IP network protocol TCP/IP. One needs to integrate fieldbus protocol and TCP/IP to realize distributed control over IP network or internet. This paper suggests a basic concept that can be applied to distributed control over IP network or internet. Specifically, LonWorks technology that uses LonTalk protocol is reviewed as device network. LonWorks technology provides networked intelligent I/O and controllers which make it a powerful, expandable solution. It is also addressed that many hardwired PLCs can be replaced by LonWorks devices. Connecting these remote LonWorks networks to the Internet can provide a powerful, integrated, distributed control system.

• Management Science and Financial Engineering
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• 제12권2호
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• pp.37-62
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• 2006

This paper considers the problem of designing logical tunnels in virtual private networks considering QoS guarantee which restricts the number of tunnel hops for each traffic routing. The previous researches focused on the design of logical tunnel itself and Steiner-tree based solution algorithms were proposed. However, we show that for some objective settings it is not sufficient and is necessary to consider both physical and logical connectivity at the same time. Thereupon, the concept of the layered network is applied to the logical tunnel design problem in virtual private networks. The layered network approach considers the design of logical tunnel as well as its physical routing and we propose a modified branch-and-price algorithm which is known to solve layered network design problems effectively. To show the performance of the proposed algorithm, computational experiments have been done and the results show that the proposed algorithm solves the given problem efficiently and effectively.

• 한국IT서비스학회지
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• 제6권2호
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• pp.177-188
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• 2007

Policy-based Network Management (PBNM) has been presented as a paradigm for efficient and customizable management systems. The approach chosen is based on PBNM systems, which are a promising and novel approach to network management. These systems have the potential to improve the automation of network management processes. The Internet Engineering Task Force (IETF) has also used policy concepts and provided a framework to describe the concept as the Policy Core Information Model (PCIM) and its extensions. There are policy conflicts among the policies that are defined as the policy information model and they are not easily and effectively detected and resolved. In this paper, we present the brief description of PBNM and illustrate the concepts of policy core information model and its policy implementation for a network security. Especially we describe our framework for detecting and resolving the policy conflicts for network security.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2002년도 ITC-CSCC -3
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• pp.1382-1385
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• 2002

By managing various communication networks collectively, Telecommunication Management Network (TMN) has appeared as a concept to aim for the unified and effective communication network operation and maintenance. IMT-2000 and other network such as PSTN, cellular networks and packet witching network that are integrated with IMT-2000 have been developed in different platforms - hardware and operating system, and a same circumstance will happen in the maintenance in the future. Also, it is difficult to approach to the standard for Ｑ3 interface implementation of the agent in TMN system that may occur in the development or the maintenance for the different platform of IMT-2000 and other networks that are integrated with IMT-2000. In order to solve this kind of Problems, this Paper suggests integrated network management agent of IMT-2000 based on the NTS model and Advanced Intelligent Network(AIN).

• 의료ㆍ복지 건축 : 한국의료복지건축학회 논문집
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• 제6권11호
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• pp.107-116
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• 2000

The digital network system is one of the most important features in the resent hospital buildings. This study is to lay out a guideline of architectural planning according to the hospitals with digital network system. First, this study develops the concept of hospital building digital network system and reports the survey results of domestic general hospitals for this matter. Required spaces by digital network system in general hospital are classified into two categories. One is equipment room, main equipment room and a telecommunication closet, to accommodate network facilities. The other is the spaces related with medical information, medical archives and the department of radiology, because digital network system makes a change the form and use of information. In result, this study proposes models for each equipment room and raises the possibility of size change of information-spaces.

• 한국전자파학회:학술대회논문집
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• 한국전자파학회 2005년도 종합학술발표회 논문집 Vol.15 No.1
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• pp.385-390
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• 2005

In this paper, we studied a new concept of wireless LAN service. Current service for wireless LAN has some weak points such as occuring a frequency shadowed area, high cost for setting a number of APs, electromagnetic interference by means of a large output transmission and weak security issues. To reduce those problems, we proposed setting antennas which are from one AP for each rooms, and designed a suitable antenna. After that we measured a PMA(Propagation Measurement & Analysis). Experimental results showed that a new concept of wireless LAN service is excellent to resolve interference and weak security issues by minimizing external propagation of a building.

• 한국구조물진단유지관리공학회 논문집
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• 제15권4호
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• pp.146-154
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• 2011

최근 사회기반시설물에 대한 공공투자는 신규건설에 대한 지출이 감소하고 유지관리분야에 대한 지출이 점진적으로 늘어나는 추세로 변화되고 있다. 이에 따라 해외 도로시설물에 대한 유지관리분야에서도 선진 개념인 자산관리 방법론이 접목되고 있으며, 보다 근본적인 시스템 개선이 요구되고 있다. 따라서 본 연구에서는 중소규모 도로관리주체에서 사용할 수 있는 자산관리개념의 유지관리 프로그램을 개발하여 예산편성의 효율성을 높이고, 도로망 전체를 고려한 네트워크 방식의 합리적인 유지보수 방안을 제시하고자 한다. 또한, 향후 다수의 시설물을 통합적으로 관리할 수 있는 체계 및 방법론을 정립하였다.