• Title/Summary/Keyword: 연동수

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A Study on Modeling Gateway for Interworking Between Local Area Network and ISDN (근거리 통신망과 ISDN의 연동을 위한 게이트웨이 모델링에 관한 연구)

  • 전주경;허기택;이동호
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.17 no.8
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    • pp.823-836
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    • 1992
  • Computer and communication network of the future will be the ISDN that enable various services. And now, it Is very Important to study the relevalent techniques to develop Interworking methods between existing computer network and ISDN The purpose of this paper Is to provide necessary basic He search results on the Interworkting method between local area network (LAN) and ISDN. For Interworking, we analyze the characteristic of existing LAN and ISDN and discuss considerations of Interworking and suggest the interworking method for CO and CL services. Also. we construct logical gateway for Interworking betwen LAN and ISDN and make formairnodeling of gateway using Petri net and verify the correctness of protocol with reachability tree. Research results should be helpful In designing and Implementing gateway between i()cal computer network and I SDN

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A Modern Reinterpretation of the Linkages by Van Schooten (van Schooten의 연동장치에 대한 현대적 재해석)

  • Heo, Nam Gu
    • Communications of Mathematical Education
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    • v.37 no.3
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    • pp.483-495
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    • 2023
  • In his book "Exercitationum Mathematicalarum," a 17th-century mathematician van Schooten proposed linkages for drawing parabola, ellipse, and hyperbola. The linkages proposed by van Schooten can be used in action-based mathematics education and as a material for using mathematical history in school mathematics. In particular, students are not provided with the opportunity to learn by manipulating the quadratic curves in the high school curriculum, so van Schooten's linkages can be used for school mathematics. To this end, a method of implementing van Schooten's linkage in a dynamic geometry environment was presented, and proved that the traces of the figure drawn using van Schooten's linkage were parabola, ellipse, and hyperbola.

UHF/HF Dual-Band Integrated Mobile RFID/NFC Linkage Method for Mobile Device-based Business Application (휴대단말 기반의 비즈니스 응용을 위한 UHF/HF 듀얼밴드 통합 모바일 RFID와 NFC의 연동 방안)

  • Park, Namje
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.38C no.10
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    • pp.841-851
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    • 2013
  • Mobile RFID/NFC linkage technology means a provision of integrated 2 existing mobile RFID services by developing the 900MHz mobile RFID reader and the NFC reader/tag into one SoC to be put on a USIM card. In this paper, the mobile RFID related technologies that offer similar services as NFC were also analyzed to understand the potential linkage to NFC and the requirements for the linkage. In addition, the introduction of dual tag and the code system linkage suggested a linking method to maximally use the existing infrastructure and the requirement satisfaction was analyzed. Lastly, based on the analysis, the future direction for the new standard design was suggested.

Design of Interworking Broker for Provisioning of End-to-End Interoperability in ATM Network Environment (ATM 망 환경에서 에이젼트 기반의 연동 브로커 설계)

  • Sohn, Sung-Won;Jang, Jong-Soo;Jung, Ha-Jae;Oh, Chang-Suk
    • The Transactions of the Korea Information Processing Society
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    • v.5 no.5
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    • pp.1285-1299
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    • 1998
  • Thousands of multimedia services are being developed over existing public networks and high-speed communication networks. In the multi-carrier network, seamless integration of terminals and services is essential in order to offer an end-to-end and user-independent service. In this paper, we propose the concept of the Interworking Broker to provide an infrastructure for building multimedia service interworking platform that supports interactive multimedia applications in distributed heterogeneous network environment. We describe main techniques developed to achieve the service interworking, and also the functional architecture of the Interworking Broker in heterogeneous ATM network environments.

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A Cooperative Security Gateway cooperating with 5G+ network for next generation mBcN (차세대 mBcN을 위한 5G+ 연동보안게이트웨이)

  • Nam, Gu-Min;Kim, Hyoungshick;Lee, Hyun-Jin;Cho, Hark-Su
    • Journal of Internet Computing and Services
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    • v.22 no.6
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    • pp.129-140
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    • 2021
  • The next generation mBcN should be built to cooperate with the wireless network to support hyper-speed and hyper-connectivity. In this paper, we propose a network architecture for the cooperation mBcN and 5G commercial network and architecture of the cooperative security gateway required for the cooperation. The proposed cooperative security gateway is between gNB and UPF to support LBO, SFC, and security. Our analysis shows that the proposed architecture has several advantages. First of all, user equipment connected with the mBcN can be easily connected through the 5G commercial radio network to the mBcN. Second, the military application traffic can be transmitted to mBcN without going through the 5G core network, reducing the end-to-end transmission delay without causing the traffic load on the 5G core network. In addition, the security level of the military application can effectively be maintained because the user equipment can be connected to the cooperative security gateway, and the traffic generated by the user equipment is transmitted to the mBcN without going through the 5G core network. Finally, we demonstrate that LBO, SFC, and security modules are essential functions of the proposed gateway in the 5G test-bed environment.

A Tightly-coupled Integration between Portable Internet and cdma2000 Mobile Communication Network (휴대 인터넷과 cdma2000 이동통신망의 밀결합 연동 방안)

  • 이건백;조진성
    • Proceedings of the Korean Information Science Society Conference
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    • 2004.04a
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    • pp.583-585
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    • 2004
  • 현재 cdma2000 1$\times$ 및 1$\times$EV-DO 이동통신망을 통해 패킷 데이터 서비스가 이뤄지고 있으며, 보다 높은 대역폭의 서비스를 위하여 휴대 인터넷 서비스 표준화가 추진되고 있다. 고속 데이터 서비스가 가능하나 서비스 커버리지가 작은 휴대 인터넷 서비스를 cdma2000 이동통신망과 효율적으로 연동하여 사용한다면 많은 성과를 얻을 수 있다. 이에 본 논문은 기존 cdma2000 이동통신망과 휴대 인터넷의 효율적인 연동망 구조와 그 세부적인 연동방안을 제시한다. 본 논문에서 제안된 밀결합 연동 구조는 기존 cdma2000 이동통신망의 수정 및 추가 구현 없이 통합된 사용자 인증 및 과금을 수행하기 용이하며 연속적인 서비스를 제공할 수 있으며, cdma2000 로 휴대 인터넷 서비스를 동시에 제공하는 이중 모드 단말의 구현 시에도 복잡도가 최소화된다.

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Water Temperature Monitoring Method to Cope with Water Level Change at the Reservoir (수위변화에 대응한 저수지에서의 수온 모니터링 기법)

  • Lee, Hyun-Seok;Chae, Hyo-Sok;Kim, Young-Sung;Lee, Yo-Sang
    • Proceedings of the Korea Water Resources Association Conference
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    • 2010.05a
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    • pp.1936-1940
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    • 2010
  • 본 연구에서는 갑작스런 호우로 인한 다목적댐 저수지 수위의 급격한 상승에도 유기적으로 대응할 수 있도록 우리나라 기후 맞춤형 수위연동 장치를 고안하였다. 현재 기본적인 제작은 완료되었으며, 수위변동으로 인한 장치의 인장 및 수축 시 균등한 측정간격을 유지할 수 있는 연동 기능의 확인 및 검증을 위한 현장 실험을 수행하고 있다. 실험결과는 2010 년 1월 1일부터 약 41일간의 수심별 수온 및 수위변화에 따른 장치의 연동특성에 나타내었다. 각 수온 자료의 측정수심은 앵커에 설치한 수위계를 이용하여 확보하였으며, 또한 각 수심별로 설치한 수위계를 이용하여 취득된 수온의 측정 위치를 확인하였다. 본 장치는 현재 약 60 m의 최대 수심을 고려하였으며, 저수지 수위변동 시 수표 면으로부터 동일 수심에서의 수온모니터링 및 부력재를 이용한 수위변동 시 등간격 연동 측정이 가능하다. 또한 향후 4 대강 및 저수지에서의 수위변화에 연동한 수온 조사 뿐 만 아니라 유속, 탁도 및 염분 등 수리특성 조사 업무까지 활용범위 확대가 가능하다.

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An Interworking Scheme for Fast Handoff between 3G and WiBro Networks (3G-WiBro 고속 핸드오프를 위한 연동방안)

  • Kim Seokhoon;Kim Cheolhong;Chang Hongsung;Ryoo Intae;Park Sung-Soo;Lee Donghauk;Chung Wonsuk;Cho Jinsung
    • The Journal of Korean Institute of Communications and Information Sciences
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    • v.30 no.5B
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    • pp.264-273
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    • 2005
  • Nowadays the integration of heterogeneous wireless networks become a hot issue in communications research area. Especiall,y, 3G and WiBro interworking will be introduced soon as users can be offered the most suitable service according to service area and service providers can reduce network construction and operation expenses. In this paper, we propose an interworking scheme for fast handoff between 3G and WiBro networks. The SCI (Smoothly Coupled Integration) scheme proposed in this paper takes advantages of the existing LCI (Loosely Coupled Integration) and TCI (Tightly Coupled Integration) scheme and can offer seamless services by providing fast handoff between 3G and WiBro although each network may work independently. Through extensive computer simulations using OPNET, the efficiency of the proposed scheme has been validated.

Integration Process of Federation Object Model for Interoperation of Federations (페더레이션 연동을 위한 객체 모델 통합 프로세스)

  • Kwon, Se Jung;Yu, Minwook;Kim, Tag Gon
    • Journal of the Korea Society for Simulation
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    • v.26 no.2
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    • pp.1-8
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    • 2017
  • High Level Architecture(HLA) is a specification for interoperation among heterogeneous simulators which are executed in a distributed environment. HLA originally allows many federates to join in a federation using a single RTI(Run-Time Infrastructure). As the target systems become more complex, the need for the interoperation of federations, performed in a RTI-RTI interoperation environment, has been growing. It can be performed by the confederation interface with the agents, which subrogate the API calls and callbacks of each federation. The existing studies have assumed that the object models of each federation are based on same HLA standard and their object descriptions are equal. Because the existing federations are usually not under this assumption, this paper proposes the integration process of object models for the federation interoperation environment. To integrate the object models for the interoperation of federations, this process resolves the differences of HLA standards, provides conversion process between objects with different descriptions and excludes the security objects. We expect that this process enhances the reusability and effectiveness of interoperation of federations in various domains.

통합 보안 관리를 위한 이기종 보안 시스템 연동

  • 이영석;나중찬
    • Review of KIISC
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    • v.13 no.1
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    • pp.32-41
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    • 2003
  • 보안 제품의 개발이 많아지면서 각 제품에 대한 통합의 필요성이 대두되고 있다. 예를 들어, 침입탐지 시스템에서 침입을 시도하는 노드를 판별한 경우, 실제 그 노드로부터의 접속을 차단할 수 있는 기능을 방화벽 시스템에서 제공하고 있기 때문에, 방화벽 시스템으로 접속 차단 명령을 보낼 수 있는 기능이 제공된다면 보다 자연스럽게 통합 관리가 이루어 질 수 있을 것이다. 그러나, 현재 보안 시장은 많은 종류의 보안 제품이 존재하기 때문에 이러한 통합이 쉽게 이루어지지는 않고 있다. 정보보호에 대한 관심이 높아지면서 많은 기업이 각종 보안시스템을 도입하고 있지만, 각 보안 시스템의 개별 관리에 중점을 두고 있어 이기종 보안 시스템간의 연동에 기반한 통합 관리 차원의 필요성이 증가된다. 따라서, 국내외의 많은 보안 업체들이 이기종 보안 제품의 연동을 위한 방안들을 제시하고 있으며, IETF(Internet Engineering Task Force)를 중심으로 표준화 작업이 진행되고 있다. 본 논문에서는 국내외 각 보안 업체 혹은 보안 업체간 컨소시엄 형태로 제안된 이기종 보안 솔루션 연동 방식 및 공개 API(Application Programming Interface) 형식들을 분석하고, 표준화 동향에 대해 살펴본다.