• 정보화사회
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• s.123
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• pp.18-23
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• 1998

전세계를 하나의 네트워크로 연결하는 인터넷은 최근 기간통신산업에도 영향을 미쳐서 인터넷을 통한 전화, 팩스 등의 부가서비스가 AT&T, MCI, BT 등 기존의 기간통신 사업자들에게 커다란 영향을 줄 정도로 시장점유율을 높여갈 것으로 예상되고 있다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.25 no.7B
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• pp.1292-1300
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• 2000

본 논문에서는 연결지향적인 ATM 네트워크에서 비연결지향적인 데이터 전송을 효율적으로 하기 위한 방법으로 Frame-Weighted(FW) 스케줄링 기법을 제시한다. 본 방법은 기존의 GPS 계열이 갖는 셀 단위에서의 스케줄링으로 인한 낮은 효율 및 높은 셀 손실을 프레임 단위에서의 스케줄링으로 극복한다. 이를 이용하면 네트워크 내의 버퍼 점유율을 낮춤으로써 프로엠 지연을 단축하고 셀 손실을 최소화할 수 있어 데이터 전송에 효과적으로 쓰일 수 있다.

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 2007.12a
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• pp.245-246
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• 2007

This paper analyses calling patterns on trunk routes and presents the network shares by throughput and the changes of calling patterns. with using quantitative data Finally, This paper suggests the degree of port centralization in Far east Asian

• The Journal of The Korea Institute of Intelligent Transport Systems
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• v.20 no.4
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• pp.13-27
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• 2021

In this study, the impact of traffic flow on the market penetration rate of autonomous vehicles(AV) was analyzed using the data for the year 2020 of the Yongin IC~Yangji IC section of Yeongdong Expressway. For this analysis, a microscopic traffic simulation model VISSIM was utilized. To construct the longitudinal control of the AV, the Intelligent Driver Model(IDM) was built and applied, and the driving behavior was verified by comparison with a normal vehicle. An examination of the study results of mobility and safety according to the market penetration rate of the AV, showed that the network's mobility improves as the market penetration rate increases. However, from the point of view of safety, the network becomes unstable when normal vehicles and AVs are mixed, so there should be a focus on traffic management for ensuring safety in mixed traffic situations.

• Digital Contents
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• no.11 s.150
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• pp.48-57
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• 2005

세계DC 유통시장이지난해150억달러에서오는2008년에는280억달러이상규모의시장으로확대될전망이다. DC 유통시장은 온라인광고와유료콘텐츠로대별되며지금까지온라인광고 시장이주도했지만, 네트워크의광대역화와이용자의마인드변화로 유료콘텐츠시장점유율이더욱커질것으로보인다. 권역별로는중국을비롯한아시아권이상대적으로더욱성장할것으로예측된다.

• Proceedings of the Korea Information Processing Society Conference
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• 2012.04a
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• pp.689-692
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• 2012

최근 스마트폰의 보급이 증가하면서 그 사용자 역시 급증하고 있는 추세이다. 이 중 안드로이드 기반의 스마트폰의 경우 Borderless Application, No limit, 다양한 플랫폼에서의 개발 및 오픈소스 등의 장점으로 인해 시장 점유율이 급속도로 증가한 반면, 그에 따른 보안이 시스템 개발속도를 따라가지 못하면서 각종 보안 취약점 및 해킹 공격 등에 위협을 받고 있다. 이에 본 논문에서는 안드로이드의 기본 구조 및 보안, 그리고 여러 가지 보안 위협 사례들을 분석하여 공격 유형을 파악한다. 또한 이를 통해 현재 보안 수준 및 문제점에 대한 향후 보안 대책과 권고사항에 대하여 고찰한다.

• KNOM Review
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• v.22 no.3
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• pp.13-19
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• 2019

Network anomaly detection is a technology that collects information about flows on a network and detects malicious attacks occurring in a network in real time. In-band Network Telemetry (INT) technology provides more detailed information in real time, that is not provided by existing networks, such as hop latency and queue occupancy. In this paper, we propose the method to implement an anomaly detection system with higher performance by using INT as an input feature of machine learning and verify it through experiments.

• The Journal of the Korea institute of electronic communication sciences
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• v.10 no.2
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• pp.289-296
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• 2015

Wireless multimedia sensor network senses and transfers mass multimedia data. Also, it is sensitive to latency. This thesis proposes a routing technique based on traffic priority in order to improve the network efficiency by minimizing latency. In addition, it proposes a congestion control mechanism that uses packet service time, packet inter-arrival time, buffer usage, etc. In this thesis, we verified the reduction of packet latency in accordance with the quality level of packet as a result of the performance analysis through the simulation method. Also, we verified that the proposed mechanism maintained a reliable network state by preventing packet loss due to network overload.

• Journal of Digital Contents Society
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• v.5 no.3
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• pp.187-191
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• 2004

Rapid time variations of the mobile communication channel have a dramatic effect on the performance of multi-carrier modulation. This paper analyzed the bit error rate (BER) performance for multi-carrier code division multiple access (MC-CDMA) network, and derived the equivalent signal-to-total noise plus interference(SNIR) of MC-CDMA system in the reverse link, the performance of MC-CDMA/BPSK signal is evaluated taking into account the fraction of partial-band interference and interference power. and the effect of partial-band interference is comprehensively studied in order to further improve the Qos of multi-carrier multimedia system.

• KDI Journal of Economic Policy
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• v.31 no.2
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• pp.87-126
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• 2009

In the internet portal industry, the indirect network externality from portal visitors to advertisers and the direct network externality among portal visitors have important implications for anti-trust policies. This paper examines the existence and the magnitude of the direct/indirect network externality in the Korean internet portal industry and measures its effect on the market power of the internet portals. The results show that the direct/indirect network externality is substantive in the industry hence the market share of a portal in the visitors' side has the 'leverage' effect on its market power in the advertisers' side.