• Journal of Internet Computing and Services
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• v.16 no.1
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• pp.75-82
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• 2015

Major corporations and portals have implemented a link server that connects Content Management Systems (CMS) to the physical address of content in a database (DB) to support efficient content use in web-based environments. In particular, a link server automatically connects the physical address of content in a DB to the content URL shown through a web browser screen, and re-connects the URL and the physical address when either is modified. In recent years, the number of users of digital content over the web has increased significantly because of the advent of the Big Data environment, which has also increased the number of link validity checks that should be performed in a CMS and a link server. If the link validity check is performed through an existing URL-based sequential method instead of petabyte or even etabyte environments, the identification rate of dead links decreases because of the degradation of validity check performance; moreover, frequent link checks add a large amount of workload to the DB. Hence, this study is aimed at providing a link server that can recognize URL link deletion or addition through analysis on the B-tree-based Information Identifier count per interval based on a large amount of URLs in order to resolve the existing problems. Through this study, the dead link check that is faster and adds lower loads than the existing method can be performed.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.47 no.7
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• pp.72-79
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• 2010

Device-to-device(D2D) links which share resources in a cellular network present a challenge in radio resource management due to the potentially severe interference they may cause to the cellular network. In this paper, a resource allocation scheme based on subset reuse methods is proposed to minimize the interference from the D2D links. We consider an adaptive group-wise subset reuse method to enhance the efficiency of frequency resource allocation for cellular and D2D links. A power optimization scheme is also proposed for D2D links if cellular links are interfered by adjacent D2D transmissions. The computer simulation results show that performance gain is obtained in link SINR, and total cell throughput increases as nearby traffic becomes more dominant.

• Journal of the Korea Society of Computer and Information
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• v.16 no.3
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• pp.75-87
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• 2011

Tactical Data Links are standardized radio communication data links for military armed forces and used to transmit and receive data. Because they are the core elements of achieving information superiority in a NCW environment, various kinds of TDL are used by the Korean armed forces. Operating various types of TDL is very helpful in getting more information; however, at the same time, it is hard to integrate and make them co-operate with other TDLs or C4ISR systems. In this paper, we propose a XML based messaging system to make various types of TDL interoperable in a NCW environment. For the messaging system between TDL and C4ISR systems, we define XML message processing interfaces and suggest binary XML for serialization to save transmission loads over constrained military communication bandwidth. Our experiment results show that the TDL message can be transformed into generalized XML data that is interoperable with other TDLs and binary XML serialization, and it saves parsing and transmission time.

• Journal of Information Management
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• v.43 no.4
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• pp.119-142
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• 2012

This study analyzed the characteristics of hyperlink service from news articles in chosun.com and washington Post sites. The study showed that the Washington Post revealed many hyperlink-related elements and an increase in interactivity while Chosun.com was not established consistent hyperlink service. Also, this study analyzed news distribution based on genre, as a result, the life section was occupied the highest proportion with 32.4% for Chosun.com, while the news sections were evenly distributed for the Washington Post. Finally, as a result of classifying the linked words into 3 categories(Informational, navigational, and transactional), the highest contents category in both Chosun.com and Washington Post turned out to be informational words. Theses results can be used to develop and provide the effective link service of news articles in internet newspaper sites.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.48 no.5
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• pp.8-15
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• 2011

LTE-Advanced aims at peak data rates of 1Gbits/s for the downlink and 500 Mbits/s for the uplink, which can be accomplished only by using wide spectrum allocation of 100MHz as well as advanced multiple input multiple output antenna techniques to the uplink. This paper analyzes the uplink precoding techniques which include LTE codebook of downlink, singular value decomposition codebook, and equal gain transmission codebook over LTE defined single carrier frequency division multiplexing systems. Finally considering nonlinear transmit power amplifier model, it is shown that link-level performance of EGT is superior to those of any other precoding schemes.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.42 no.1
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• pp.77-87
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• 2017

Even though current LTE/LTE-A mobile networks provide enough high data rate and low latency to support conventional wireless services, to support ultra-low delay services, such as virtual reality and remote control, in the next generation mobile communication network, it is required to provide very low delay about several ms. However, in the uplink transmission of the LTE/LTE-A system, the process of scheduling grant is required to obtain uplink resources for uplink transmission from the eNB. The process of granting uplink resources from eNB brings additional fixed latency, which is one of the critical obstacles to achieve low delay in uplink transmissions. Thus, in this paper, we propose a novel uplink transmission scheme called Cut-in uplink transmission, to reduce uplink latency. We provide the performance of the proposed uplink transmission scheme through simulations and show the proposed uplink transmission scheme provides lower uplink transmission delay than conventional uplink transmission scheme in LTE/LTE-A mobile networks.

• Proceedings of the Korea Information Processing Society Conference
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• 2014.11a
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• pp.1057-1060
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• 2014

본 논문에서는 기존의 Open API 단점을 극복하기 위하여 웹상에 구조화된 링크드 데이터 구축 및 검색 기술을 제안한다. 현재 링크드 데이터에 대한 핵심 이슈는 링크드 데이터의 효율적인 저장, 검색, 그리고 활용 애플리케이션 개발이다. 본 논문에서는 링크드 데이터를 효율적으로 구축하기 위한 7단계 구축 방법을 제시하고 있다. 또한, 저장 및 검색 시스템을 위해 로컬 방식과 분산 방식의 절충안인 압축된 로컬 인덱스 구조를 제안한다. 이러한 인덱스를 사용하여 고도로 분산된 링크드 데이터에 대한 쿼리를 효율적으로 수행할 수 있고 시스템 저장 공간도 상당히 줄일 수 있다.

• Journal of KIISE:Computing Practices and Letters
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• v.7 no.3
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• pp.211-219
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• 2001

텍스트 정보만을 이용하는 일반적인 검색엔진들의 한계를 극복하여 향상된 결과를 내기 위하여 링크 구조를 이용해 검색을 수행하는 시스템이 새롭게 등장하고 있다. 링크 구조는 사용자의 질의에 대해 중요한 문서들을 가려준다. 본 논문에서는 한 걸음 더 나아가 링크 정보를 이용하여 검색된 웹 페이지들 중 사용자의 기호에 적절한 결과를 도출하는 방법을 제안한다. 사용자 프로파일에 기반한 퍼지 개념 네트워크로 구축된 퍼지 문서 추출 시스템은 사용자의 성향을 반영하여 링크 기반 검색결과를 개인화 한다. 5명의 사용자에 대한 실험결과, 개발한 시스템이 의미 있는 웹 페이지를 검색함은 물론이고 사용자의 성향을 잘 반영함을 알 수 있었다.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.39B no.5
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• pp.326-328
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• 2014

In this paper we propose an efficient algorithm for LSA(Link State Advertisements) flooding. Link state routing protocols have been widely adopted in wired networks. When link state change occurs, a LSA is flooded into the whole network. The overhead of LSA flooding may be a big problem in wireless networks because their link states can be changed frequently. We propose an efficient flooding method that optimizes the flooding processes in wireless networks.

• Proceedings of the Korea Contents Association Conference
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• 2017.05a
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• pp.173-174
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• 2017

우리 대법원은 2015년 링크에 대해서 저작권의 침해가 성립할 수 없다는 취지의 판결을 내렸고 2016년에는 지방법원에서 임베디드 링크의 경우에는 저작권의 직접침해를 구성할 수 있다는 취지의 판결을 내린바가 있다. 이에 앞서서 유럽사법재판소는 링크의 저작권 침해와 관련된 3개의 판결을 내린바가 있다. 물론 유럽의 저작권 논리를 우리나라에 그대로 적용하기에는 무리가 있지만 우리나라에서 링크를 통한 저작권침해를 규제하는데 일정 부분 도움을 줄 수는 있을 것이다. 그래서 본 논문에서는 유럽사법재판소의 판결들을 소개하고 우리나라에 적용여부를 알아보도록 하겠다.