• Title/Summary/Keyword: 인터넷 위상

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Subcarrier Label Suppression Using DC-SOA in All Optical Packet Routing Module (전광 패킷 라우팅 모듈에서 DC-SOA를 사용한 서브캐리어 레이블 억압방법)

  • 주우영;정영철
    • Proceedings of the Optical Society of Korea Conference
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    • 2001.02a
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    • pp.170-171
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    • 2001
  • 차세대 광 인터넷 시스템을 구축하는 데 있어서 패킷을 광신호 상태에서 라우팅하기 위한 전광 교환 방식에 대한 연구가 최근 관심을 끌고 있다. 전광 패킷 라우팅모듈을 구현하는 데 있어서 파장변환 기술은 필수적이며 여러 가지 형태에 대한 연구개발이 진행되고 있다. 최근에는 반도체 광 증폭기로 형성된 방향성 결합기 구조(semiconductor optical amplifier directional coupler)에서의 상호위상변조(XPM : cross-phase modulation)에 의한 파장변환에 대한 개념이 제안되고 가능성이 실험적으로 입증된 바 있다. (중략)

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Near-end Cross-talk Analysis of Unshielded Twisted Pair Cable using the Transmission Line Model (전송선로 모델을 이용한 UTP 케이블의 NEXT 해석)

  • Lee, Won-Hui;Park, Wee-Sang
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.9 no.2
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    • pp.59-63
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    • 2009
  • The UTP cable has been widely used, recently it is being developed for use in the UHF frequency band. One important characteristic of the UTP cable is NEXT. This research is to develop a pitch selection technique for an UTP cable which leads to a satisfactory NEXT. The transmission line model involving mutual inductances and capacitances between line pairs is used, and the simulation was carried out for frequencies from 1 MHz to 600 MHz. With respect to the worst margin of the NEXT for a Cat. 6 cable the simulation and measurement results show a good agreement.

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Implementation of Policy Based Network Management System with COPS-PR for MANET (MANET에서 COPS-PR을 이용한 정책 기반 망 관리 시스템의 구현)

  • Huh, Jee-Wan;Lee, Sung-Hwa;Song, Wang-Cheol
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.9 no.5
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    • pp.1-6
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    • 2009
  • MANET(Mobile Ad-hoc NETwork), a network characterized that its moving nodes freely constructs Network topology, has other different characteristics. Because Policy based Network Management in MANET guarantees QoS between nodes, it is essential in applied areas like VANET which targets safety and convenience. In this paper, we use COPS-PR which is appropriate Policy Exchange Protocol for MANET, and implement DiffServ-based QoS in the real networks and experiment its capability.

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Complex-Channel Blind Equalization Using Cross-Correntropy (상호 코렌트로피를 이용한 복소 채널 블라인드 등화)

  • Kim, Nam-Yong
    • Journal of Internet Computing and Services
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    • v.11 no.5
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    • pp.19-26
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    • 2010
  • The criterionmaximizing cross-correntropy (MCC) of two different random variables has yielded superior performance comparing to mean squared error criterion. In this paper we present a complex-valued blind equalizer algorithm for QAM and complex channel environments based on cross-correntropy criterion which uses, as two variables, equalizer output PDF and Parzen PDF estimate of a self-generated symbol set. Simulation results show significantly enhanced performance of symbol-point concentration with no phase rotation in complex-channel communication.

IPv6 포럼 코리아

  • Lee, Hyeong-Ho
    • TTA Journal
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    • s.103
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    • pp.46-49
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    • 2006
  • IPv6 포럼 코리아(http://www.ipv6.or.kr)는 지난 2000년, 정부의 지원 하에 IPv6 기술의 국내 조기 도입을 목표로 IPv6 도입의 기술적 타당성 검증 및 적시성 검토, IPv6 관련 시장 활성화, IPv6 기술의 교육및 보급, IPv4 기반의 인터넷에서 IPv6 기반의 차세대인터넷으로 전환 하기 위한 환경조성 등을 목적으로 구성되었으며, 올해로 만 6년째를 맞이하고 있다. 2006년 1월 현재 IPv6 포럼 코리아는 ETRI를 중심으 로 국내 산·학·연의 73개 기관회원과 158명의 개인회원이 참여하고있으며, 의장인 이형호 박사(한국전자통신연구원 표준연구센터장)를 중 심으로 국내 정부 지원 IT 핵심 포럼 중에서 가장 활발한 포럼 중의 하나로 성장하였다. 지난 6년 동안 본 포럼은 국내 산·학·연을 중심으로 IPv6 기술 교류및 보급을 통한 기술력 확보 및 기반 조성 노력을 강화해 왔으며, 국제 IPv6 포럼(http://www.ipv6forum.com)과 연계하여 국제 사회에서 우리나라의 위상 제고 노력을 경주해 왔다. 특히, 국내외에서 IPv6의 도입 및 Promotion이 충분히 활성화됨에 따라 IPv6 포럼 코리아는 2005년을 IPv6 관련 포럼 표준화 추진의 원년으로 삼고 효율적인 포 럼표준화 추진을 위하여 새롭게 조직을 정비하고 국내외의 IPv6 관련표준화에 주도적인 역할을 수행하고 있다.

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Rediscovery of Broadcast Spectrum in the Era of Broadcasting and Telecommunication Convergence: Positioning in NGN (방송통신융합시대 방송주파수 대역의 재발견: 통합무선망에서의 위상)

  • Kim, Ki-Hong;Hwang, Sung-Ho;Min, Jun-Ki
    • The Journal of the Institute of Internet, Broadcasting and Communication
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    • v.9 no.6
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    • pp.211-217
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    • 2009
  • In this paper, we discussed convergence in terrestrial broadcasting and wireless communication with respect to technology and service models. Especially, retrieval and relocation of TV broadcast spectrum after upcoming D-TV transition is investigated so that the benefit for broadcasting and communication industries as well as spectral efficiency to be maximized. Also, the role of TV broadcast spectrum as a utility for convergence of two industries is investigated based on open spectrum, open platform and open application initiatives.

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Optimal Number and Location for Web Proxies in Linear and Ring Networks (선형과 고리 구조 네트워크에서의 웹 프락시 최적 개수와 위치)

  • 정행은;최정임;이상규;문봉희
    • Proceedings of the Korean Information Science Society Conference
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    • 2000.04a
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    • pp.609-611
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    • 2000
  • WWW의 대중화를 통한 인터넷 사용자의 증가로 발생되는 통신지연의 해결책으로 웹 캐싱 방법이 고려되어 왔다. 웹 서버의 용량초과로 서비스시스템을 확장하고자 할 때 서버 운영자의 측면에서는 사용자의 서비스 응답시간을 줄이는 것 못지 않게 서버를 확장하고 유지하는데 드는 비용을 최소화하는 것도 중요한 사항이다. 그러므로 본 논문에서는 인터넷상에서 프락시가 될 수 있는 잠재노드들이 양방향 통신을 지원하는 링크들로 선형(linear)과 고리(ring) 구조를 이룰 때 서비스 노드들 각각이 정해진 임계 응답시간을 보장하기에 필요한 최소한의 프락시의 개수와 그의 위치를 동시에 찾아내는 알고리즘을 제안한다. 여기서 프락시의 위치는 위상의 어느 족에 위치해도 무방하다고 본다.

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A Study on Project Resource & Information Management with Internet Application(PRIMA system) (디지털 정보화를 통한 현장 자원 및 정보관리 기술에 관한 연구(PRIMA 시스템))

  • Kim Oe-Gon;Lee Dong-Ryul
    • Korean Journal of Construction Engineering and Management
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    • v.2 no.1 s.5
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    • pp.88-97
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    • 2001
  • The Internet, the main issue of a new millennium, is being researched vitally for the progress of the construction industry, and the construction industry is considered to be led into a high-value added state-of-arts technology industry through CALS. Even if many construction companies gradually widen the use of the Internet for various purposes such as an electronic bidding system and an e-commerce system, the companies are still demanded to use the Internet more broadly and practically. Hence, the need for a tool for fast decision making and an effective construction management has risen. The PRIMA system has been developed specifically focused on meeting with those recent changes of the construction industry. This system is composed of three parts. Those are Just In Time(JIT) management, integrated application of man power${\cdot}$safety${\cdot}$work management and decision making process based on real-time information in the Internet. The usefulness of the PRIMA system has already been proved in a super-scale construction project. As the Internet environment get improved the use of the tool will be spread out gradually for many construction projects, regardless their size and location.

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Network-based Digital Crossover for Active Speakers (능동스피커를 위한 네트워크기반 디지털 크로스오버)

  • Kim, Byun-Gon;Kim, Kwan-Woong;Kim, Dae-Ik
    • The Journal of the Korea institute of electronic communication sciences
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    • v.10 no.2
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    • pp.227-232
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    • 2015
  • Nowadays, there are many innovative products in the pro-audio market thanks to advanced IT technology, DSP is very important technology to process high quality audio signal in SR(Sound Reinforcement) system. Digital audio technology that converged with IT technology can give new user-experience. In this paper, we present a new digital crossover system for active speakers using DSP and network technology. The prototype of crossover module consists of various audio process module such as filters, delay, phase controls and also it provides user to remote monitoring and remote control features by internet connection.

Classification and Developmental Direction of Domestic Internet Advertising (국내 인터넷 광고의 유형과 발전방향에 대한 고찰)

  • 안성혜
    • Archives of design research
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    • v.16 no.3
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    • pp.241-252
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    • 2003
  • Currently while a phase of the Internet as an advertising media is firm, and Internet advertisement utilization of a company rises, and the consumers contact with various Internet advertisements. A lot of Internet advertisements of various forms made with new technology to develop rapidly are executed and will disappear again. Now, It is necessary to classify various types of the Internal advertisement which was made by a sharp environment change, and was tested of the last ten years and to classify expression techniques systematically. At the same time, we have to check a development direction of domestic Internet advertisement and trend. It is a point of time that Internet advertisement must be designed in a macroscopic dimension like the four medium advertisement by an advertisement strategy and an expression strategy. In this paper, first I classified a type of domestic Internet advertising into marketing, an advertisement purpose, an expression form, manufacture technology, and an express on method systematically in five sides so far And I tried to consider the form and characteristics. By next time, while examine change of internet marketing paradigm, I checked trend of recently domestic Internet advertising in accord to a change of consumer's use tendency and a change of Internet advertisement manufacture technology, and tried to consider the development course in the marketing side, the manufacture technical side, and the creative side. Finally, I wish to propose necessity of expression strategy establishment to promote development of the interactive advertisement technique that considered the creative side in order to raise an effect of Internet advertisement.

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