• Convergence Security Journal
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• v.16 no.7
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• pp.3-11
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• 2016

With repid development of optical networking technology, Software-Defined Network (SDN) and Network Function Virtualization (NFV), high performance networking service, collaboration platform that enables collaborative research globally, drastically National Research Network (NRN) including Internet Service has changed. Therefore we compared and analyzed several world-class NRNs and took a view of future development strategy of the NRN. Also we suggest high speed security environment in super high bandwidth network with 40Gbps and 100Gbps optical transmission technology, network separation of NRN with Science DMZ to support high performance network transmission for science big data, building security environment for last-mile in campus network that supports programmability of IDS using BRO framework.

• Journal of Institute of Control, Robotics and Systems
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• v.5 no.6
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• pp.753-763
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• 1999

The existing SCADA(Supervisory Control and Data Acquisition) system software is usually developed to suitable for the specific hardware platforms. However, as per rapid improvement of computer performance and development of network technology, it is required to support scalability and inter-operability in existing different SCADA systems. In order to meet such requirements, in this paper, we propose a new type of SCADA testbed using Java for electric distribution applications. The system consists of three modules; development support tools, client and server modules. The basic architecture of the proposed SCADA system is similar to existing one, however, we improve the function of MTU and MMI interface to facilitate LAN and WAN environment. Also, the proposed system can deals with alarm and history data by using heterogeneous DBMS. Since the system is built in Java environment, the development cost is cheap and it can support sacalability and portability. Our experience can be utilized to develop next generation of small and medium size of SCADA system.

• Journal of the Institute of Electronics Engineers of Korea TE
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• v.37 no.5
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• pp.117-124
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• 2000

As network security is coming up with significant problem after the major Internet sites were hacked nowadays, IDS (Intrusion Detection System) is considered as a next generation security solution for more trusted network and system security We propose the new IDS model which can detect intrusion in the expanded distribute environment in host level, drawback of existing IDS, and implement prototype. We used pattern extraction agent so that we extract automatically audit file needed in intrusion detection even in other Platforms.

• Electronics and Telecommunications Trends
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• v.16 no.2 s.68
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• pp.10-30
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• 2001

본 고에서는 차세대 인터넷 구축을 위한 요소 기술에 대하여 전반적으로 살펴본다. 우리는 현재보다 1,000배 빠른 차세대 인터넷의 구축을 목표로 하고 있다. 따라서 과연 그만큼 빠른 인터넷의 구축이 필요할 것인가를 검증하는 차원에서 향후 5년 정도의 가까운 시일 내에 있을 인터넷 트래픽의 증대에 대한 수요를 서비스 측면에서 살펴본다. 차세대 인터넷은 풍부한 전송대역폭의 제공과 QoS를 기반으로 한 신뢰성 있는 데이터의 전달을 특징으로 하며, 이를 위해서 광스위칭 기반의 전송 하부구조 위에 MPLS 기술이 사용될 것으로 예상된다. 이를 위한 요소기술로 DWDM 전송기술, MEMS 기반의 광스위칭 소자기술과 함께 광스위칭 기술에 지능을 부여하기 위한 표준화 동향에 대하여 살펴본다. 현재의 IP 기반 인터넷에서 제공하지 못하는 QoS 기능은 MPLS에서 가능하게 될 것이다. MPLS에서의 중요한 응용인 트래픽 엔지니어링과 VPN 서비스는 망이 보다 안정적으로 유지될 수 있도록 지원하면서 기업들이 MPLS 망을 이용하여 자신의 망을 구축할 수 있도록 지원할 것이다. MPLS 기술은 IETF에서 표준화가 진행되고 있으며 라우터 개발업체 및 ISP의 큰 지원을 받고 있다. 차세대 인터넷을 위해서는 전달망의 구축도 필요하지만 이와 함께 차세대 인터넷 응용을 위한 컴퓨팅 인프라도 균형있게 개발되어야 한다. 따라서 현재 그 윤곽을 드러내고 있는 차세대 인터넷 응용 인프라 환경에 대하여 그 등장 배경과 관련 기술에 대하여 조망한다. 차세대 인터넷의 개발을 위해서는 광처리 관련 원천 기술, 프로세서 개발 기술, 라우터 설계 기술 및 서버 개발 기술, 어플리케이션 기반 기술 및 사용자 인터페이스 기술들이 전략적으로 이음새 없이 매끄럽게 통합되어야 한다. 이러한 관점에서 필요한 요소기술들을 다수 보유하고 있는 ETRI의 역할은 매우 중요하리라 생각된다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2001.05a
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• pp.676-679
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• 2001

As network security is coning up with significant problem after the major Internet sites were hacked nowadays, IDS(Intrusion Detection System) is considered as a next generation security solution for more reliable network and system security rather than firewall. In this paper, we propose the new IDS model which tan detect intrusion in different systems as well as which ran make real-time detection of intrusion in the expanded distributed environment in host level of drawback of existing IDS. We implement its prototype and verify its validity. We use pattern extraction agent so that we can extract automatically audit file needed in distributed intrusion detection even in other platforms.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2008.10a
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• pp.659-662
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• 2008

최근 모바일 단말의 종류가 크게 증가하고 있으며, 그 기능과 성능이 크게 향상되고 있다. 또한 이동통신 기술의 발전으로 통신 방식이 다양해지고 있으며 속도도 크게 개선되고 있어 모바일 단말을 통한 인터넷 서비스의 활용에 대한 요구가 크게 증가하고 있다. 이러한 상황의 변화는 모바일 단말의 기능이 통신 기능보다는 서비스 기능을 강화하는 방향으로 진화하게 만들었으며, 이는 실제로 모바일 단말 제조사들이 구글 폰, 야후 폰 등 기존의 인터넷 서비스와 긴밀하게 통합된 기능을 제공하는 제품을 제품화하고 있다. 최근 국내 및 국외의 주요 인터넷 서비스 업체들은 자신들의 서비스를 플랫폼화하여 서비스를 제공하고 있다. 특히 구글, 야후, 아마존, 이베이 등 국외의 주요 업체들은 자신들의 서비스 플랫폼에 대한 개방형 API(Open API)를 공개하여 다양한 클라이언트 응용들이 자신의 서비스를 쉽게 활용할 수 있도록 환경을 구축하고 있으며 이를 기반으로 응용 개발자들을 전폭적으로 지원하고 있다. 이러한 상황에서 모바일 서비스 환경도 사용자들이 유선상에서 사용하던 다양한 인터넷 서비스를 모바일 환경에서 사용하고자 하는 요구가 크게 증가하고 있다. 이는 모바일 단말 시장에서 중요한 요구사항으로 인식되어 향후 모바일 플랫폼들은 편리한 인터넷 서비스와의 연동 기능을 지원할 것으로 예상된다. 본 논문에서는 모바일 단말을 위한 차세대 모바일 웹 플랫폼에 대한 요구사항을 정리해보고, 이를 위한 플랫폼을 설계하여 제안한다.

• Journal of Communications and Networks
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• v.5 no.3
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• pp.275-281
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• 2003

Random Early Detection (RED) [1] is an active queue management scheme which has been deployed extensively to reduce packet loss during congestion. Although RED can improve loss rates, its performance depends severely on the tuning of its operating parameters. The idea of adaptively varying RED parameters to suit the network conditions has been investigated in [2], where the maximum packet dropping probability $max_p$ has been varied. This paper focuses on adaptively varying the queue weight $\omega_q$ in conjunction with $max_p$ to improve the performance. We propose two algorithms viz., $\omega_q$-thresh and $\omega_q$-ewma to adaptively vary $\omega_q$. The performance is measured in terms of the packet loss percentage, link utilization and stability of the instantaneous queue length. We demonstrate that varying $\omega_q$ and $max_p$ together results in an overall improvement in loss percentage and queue stability, while maintaining the same link utilization. We also show that $max_p$ has a greater influence on loss percentage and queue stability as compared to $\omega_q$, and that varying $\omega_q$ has a positive influence on link utilization.

• Journal of Korea Society of Digital Industry and Information Management
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• v.8 no.4
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• pp.43-51
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• 2012

Web 3.0 is the next-generation of the World Wide Web and is included two main platforms, semantic technologies and social computing environment. The basic idea of web 3.0 is to define structure data and link them in order to more effective discovery, automation, integration, and reuse across various applications. The semantic technologies represent open standards that can be applied on the top of the web. The social computing environment allows human-machine co-operations and organizing a large number of the social web communities. In the recent years, recommender systems have been combined with ontologies to further improve the recommendation by adding semantics to the context on the web 3.0. In this paper, we study previous researches about recommendation method and propose a recommendation method based on web 3.0. Our method scores documents based on context tags and social network services. Our social scoring model is computed by both a tagging score of a document and a tagging score of a document that was tagged by a user's friends.

• Journal of Korea Spatial Information System Society
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• v.11 no.4
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• pp.28-32
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• 2009

For the ubiquitous web environment internet, as an one of the R&D projects by Korean Land Spatialization Group, the project for platform technologies was initiated to provide customized land information and geospatial service. The platform technologies can be categorized for streaming, mashup and geosearch. More specifically, the 2D/3D hybrid streaming engine, mashup engine for u-GIS service and next generation search engine for land information have been developed. In this context, the patent analyses are required to propose the strategies for efficient development and use of these technologies. This study searches the related patents in Korea, US and EU, analyzes the trend of them for customized spatial information technologies, and finally proposes proper strategies.

• THE INTERNATIONAL COMMERCE & LAW REVIEW
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• v.29
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• pp.121-142
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• 2006

With the advent of Ubiquitous era, Korean government understood its strategic importance and formulated 'IT839 Strategies' with various action plans not to miss the great opportunities which it may allow and eventually to realize u-Korea. As a result, m-Commerce is actualized and new types of Ubiquitous services such as digital multimedia broadcasting(DMB) and wireless broadband Internet(WiBro) are now on their commercial stages. Digital contents are the key success factors of these new services. Digital contents industry is regarded as next generation of growth engine in the digital economy, because it is knowledge-based and high value-added global industry affecting positively on the whole private and public sectors. This paper reviewed the characteristics, business models, technical and market trend of digital contents to be compatible with Ubiquitous environment. Also, it reviewed the development strategies of DMB and WiBro services, which are newly introduced and commercialized in Korea to make it as world leader in these fields. It may be concluded that Korea should make more efforts to development market-oriented digital contents for Ubiquitous era and to realize the sustained economic growth.