• Journal of information and communication convergence engineering
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• 제10권4호
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• pp.329-336
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• 2012

For designing broadcast protocols in mobile ad hoc networks (MANETs), one of the important goals is to reduce the rebroadcast packets redundancy while reaching all the nodes in network. In this paper, we propose a probabilistic broadcasting mechanism based on selfishness and additional coverage in MANETs. Our approach dynamically adjusts the rebroadcast probability according to the extra covered area and number of neighbor nodes. By these two factors, mobile hosts can be classified into three groups: normal, low selfishness, and high selfishness groups. The nodes in the normal group forward packets for other nodes with high probability, whereas the nodes in the low selfishness group rebroadcast packets with low probability and the nodes in the high selfishness group do not rebroadcast packets. We compared our approach with simple flooding and the fixed probabilistic approach. The simulation results show that the proposed schemes can significantly reduce the number of retransmissions by up to 40% compared simple flooding and fixed probabilistic scheme without significant reduction in the network reachability and end-to-end packet delay.

• 문화기술의 융합
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• 제6권3호
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• pp.27-32
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• 2020

연구는 한국 예능 프로그램의 포맷 수입이 중국 방송 산업에 미친 영향에 대해서 분석하였다. 이를 위해 중국 방송사 제작진과의 심층인터뷰를 실시하였다. 본 연구의 분석 결과 한국 예능 프로그램 포맷을 수입하면서부터 중국 예능 프로그램의 포맷과 제작방식에 변화가 일어나기 시작한 것으로 나타났다.

• 한국언론정보학보
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• 제47권
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• pp.74-95
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• 2009

독일 공영방송은 80년대 중반 이원방송 제도 도입 시 연방헌법재판소에 의해 국민 각계각층의 의견을 반영하여 다양성을 보존해야 하는 방송의 '기본적 공급과제'(Grundver-sorgungsaufgabe)를 부여받았고 이 과제수행을 위해 수신료에 의한 재정 지원과 발전이 보장되어 있다. 90년대 독일 공영방송은 디지털 전문채널의 확대와 적극적 온라인 서비스 활동으로 융합 환경에 대응해왔고 이는 지속적 수신료 인상의 주요 동인으로 비판의 대상이 된 것이다. 법적 근거가 있는 공영방송의 디지털 전문채널에 비해 매스커뮤니케이션인 방송을 대상으로 하는 기본적 공급과제의 연계기능으로서 온라인 서비스는 법적 한계가 있는 것이다. 대외적으로는 유럽연합의 공영방송 수신료에 대한 국가보조 금지 통제와 타협, 국내적으로는 공영방송 수신료 인상폭의 축소 결정과 이 과정에 대한 국가의 개입으로 2007년 위헌으로 판결된 제9차 수신료 판결을 거치며 결국 공영방송 온라인 서비스는 TV와 라디오에 이어 기본적 공급과제에 속하는 제3의 미디어로서 위상이 확립되었다. 2009년 6월 1일자로 공포된 제12차 개정 방송국가협약에서 수신료 판결, 공익성 검증 도입, 유럽연합 시청각미디어서비스 지침의 독일국내법 전환 등 3차원의 법제화가 단행되었다. 유럽연합의 영향으로 독일 방송계의 지각변동기 일어난 이 과정은 융합시대에도 변할 수 없는 독일 고유의 공익적 방송환경 유지 의지를 현재의 상황에서 법적으로 관철한 것이며 이는 신자유주의 확신추세 속에서 융합 환경에 상응하는 우리나라의 공익적 규제체계 마련에 이론적, 법적 논거가 될 수 있다.

• 방송공학회논문지
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• 제14권2호
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• pp.189-196
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• 2009

통신과 방송이 융합되는 모바일 데이터 방송에서 방송 아이템 스케줄링을 위한 방법으로서, 주기적인 방법과 on-demand 방법을 혼합한 새로운 방법을 제안한다. 방송 아이템은 DMB 등의 하향 방송채널을 통하여 전달되고, 사용자들의 요구 메시지는 셀룰러 폰, 무선랜, 와이브로 등의 다양한 상향 통신채널을 통하여 서버에 전달되는 환경을 가정한다. 서버는 사용자들의 요구 통계를 바탕으로, 방송할 데이터 아이템들을 인기 아이템과 비인기 아이템의 집합으로 나눈다. 그리고 인기 아이템 주기적인 방법으로 전송되고, 비인기 아이템에는 on-demand 방법을 적용한 혼합 형태로 스케줄링한다. 시뮬레이션을 통한 성능평가를 수행하여, 제안하는 스케줄링 방법이 기존의 방법들에 비하여 적은 응답대기시간과 높은 응답성공률을 나타냄을 확인하였다.

• International journal of advanced smart convergence
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• 제12권3호
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• pp.141-148
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• 2023

As the direction of education in the fourth industry in the 21st century, convergence talent education that emphasizes the connection and convergence between core competency-based education and academia is emerging to foster creative talent. The purpose of this paper is to present the criteria for evaluating the competency of learning outcomes in order to develop a strategic model for innovation in engineering teaching-learning. In this paper, as a study to establish the direction of implementation of convergence talent education, a creative innovation teaching method support system was established to improve the quality of convergence talent education. Firstly, a plan to develop a teaching-learning model based on computing thinking. Secondly, it presented the development of a teaching-learning model based on linkage and convergence learning. Thirdly, we would like to present educational appropriateness and ease based on convergence learning in connection with curriculum improvement strategies based on computing thinking skills. Finally, we would like to present a strategic model development plan for innovation in engineering teaching-learning that applies the convergence talent education program.

• International Journal of Internet, Broadcasting and Communication
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• 제11권3호
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• pp.8-19
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• 2019

Since their emergence in 2007, smart phones have advanced up to the point that 5G mobile communication in 2019 started to be commercialized. Accordingly, now it is possible to share 3D modeling files and collaborate by means of a mobile web. As the recently commercialized 5G mobile communication network is so useful in sharing 3D modeling files and collaborating that even large-size geometry files can be transmitted at ultra high speed with ultra low transfer delay. We examines characteristics of major 3D file formats such as STL, OBJ, FBX, and glTF and compares the existing 4G LTE (Long Term Evolution) network with the 5G NR (New Radio) mobile communication network. The loading time and packets of each format were measured depending on the mobile web browser environments. We shows that in comparison with 4G LTE, the loading time of STL and OBJ file formats were reduced as much as 6.55 sec and 9.41 sec, respectively in the 5G NR and Chrome browsers. The glTF file format showed the most efficient performance in all of the 4G/5G mobile communication networks, Chrome, and Edge browsers. In the case of STL and OBJ, the traffic was relatively excessive in 5G NR and Edge browsers. The findings of this study are expected to be utilized to develop a 3D file format that reduces the loading time in a mobile web environment.

• 대한안전경영과학회지
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• 제9권1호
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• pp.95-106
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• 2007

The development of information technology, which has brought the fusion of broadcasting and telecommunication, wire and wireless communication and voice and data, is developing new fusions like home network which is composed of IT, construction, and home appliances. This trend is considered to continue and to make other new fusions based on previous ones. In this study, we investigate the roles of RFID middleware by identifying the relationships between the new expected fusions and RFID.

• 대한안전경영과학회:학술대회논문집
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• 대한안전경영과학회 2007년도 춘계학술대회
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• pp.387-397
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• 2007

The development of information technology, which has brought the fusion of broadcasting and telecommunication, wire and wireless communication and voice and data, is developing new fusions like home network which is composed of IT, construction, and home appliances. This trend is considered to continue and to make other new fusions based on previous ones. In this study, we investigate the roles of RFID middleware by identifying the relationships between the new expected fusions and RFID.

• ETRI Journal
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• 제34권1호
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• pp.110-113
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• 2012

We propose a very-low-complexity lattice-reduction (LR) algorithm for multi-input multi-output detection in time-varying channels. The proposed scheme reduces the complexity by performing LR in a block-wise manner. The proposed scheme takes advantage of the temporal correlation of the channel matrices in a block and its impact on the lattice transformation matrices during the LR process. From this, the proposed scheme can skip a number of redundant LR processes for consecutive channel matrices and performs a single LR in a block. As the Doppler frequency decreases, the complexity reduction efficiency becomes more significant.

• 한국컴퓨터정보학회:학술대회논문집
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• 한국컴퓨터정보학회 2011년도 제43차 동계학술발표논문집 19권1호
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• pp.189-190
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• 2011

Recently people have increased to climb mountain. Owing to developing IT technology, the number of people using smart phone have increased remarkably as well. In this context, the Korea Forest Service has implemented the project of Mountain Climbing Information Public Service(MCIPS). The purpose of the MCIPS is to support climbing safely based on a trail map of spatial data of GIS(geographic information system). The customer will be able to access the MCIPS through n-screen(IP-TV, Web Site, Smart phone, Galaxy tab) provided a broadcasting and telecommunication convergence service. In addition, the MCIPS would support two-way communication through connecting to Twitter and Youtube. The MCIPS will make the customer fun using Augmented Reality(AR) of Smart phone(Android) and contribute to protecting people from mountain accidents.