• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.8 no.6
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• pp.77-88
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• 2008

This paper addresses the implementation of FTTH system based on G-PON technology. This system supports the duplication function that can switchover both TDM and data routes within 10msec. This system consists of OLT and ONU/ONT. G-PON OLT supports the maximum 32 2.5Gbps interfaces, and then has the flexibility and the scalability for supplying digital communication and broadcasting convergence service in the near future. OLT system consists switch module, subscriber module, processor module, and G-PON link module, and has the operating system based on Linux. ONU is installed in customer premise to supply TPS (Triple Play Service). Also ONT has the dedicated interface for IP-TV to improve the transmission characteristics of IP-TV signal.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.47 no.12
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• pp.104-110
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• 2010

Japan TV broadcasting signals are measured and analyzed to estimate spillover level from Japan during 44 months from Feb. 2003 to Oct. 2009. Electric field intensity spillover into Korea is measured using fixed measurement system in Busan, and the relationship between the measured data and the predicted value is analyzed by year and seasons. Measurement results show that spillover signals from Japan have a serious effect on Korea broadcasting environment, and so that proper digital switchover strategy is necessary to cope with the spillover situation.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.47 no.12
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• pp.97-103
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• 2010

In this paper, worldwide standards and regulations on in-band/out-of-band emission characteristics of DTV broadcasting equipments are reviewed, and emission mask requirements of several equipment types are analyzed. Out-of-band emission mask draft suitable for DTV repeater is proposed and its usefulness is evaluated and verified in the experiments. Using the proposed standard, small-sized and cost effective DTV repeater can be implemented to broaden DTV broadcasting coverage for digital switchover.

• Journal of Digital Convergence
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• v.10 no.11
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• pp.477-484
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• 2012

In order to clearly define and understand an essential meaning on a growing number of immigrant women with an experience of being in pregnancy and childbirth, who married to men living in rural community in Korea, our study has been carried out with a phenomenological research method. Basic information collection was implemented by doing multiple in-depth interviews in being recorded with nine immigrant women married to the men, and also analyzed by the phenomenological method of Colaizzi. As the result of the study, the switchover in their life on the course to adaptation or transition to Korean life with experience of being pregnant and delivery generally classified into up to four categories and nine subjects. The four categories come out with "expectation of unknown world/country", "being experienced of new challenge", "feeling happiness going through anguish of hear" and "expectation/hope with her giving birth to a baby-transition in her life". Thus, the result of this study is intended to understand their difficulties likely caused or felt in adaptation to Korea life and culture, and to provide solutions or information of a program for their being actively adapted that may help get them easily assimilated into Korean life and culture.

• The Journal of Korean Institute of Electromagnetic Engineering and Science
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• v.23 no.8
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• pp.909-922
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• 2012

To fully utilize scarce spectrum resource, it's necessary to develop and evaluate promising business models prior to making technology R&D plan and industrial promotion policy. The purpose of this paper is to design potential business models, evaluate the propriety of commercializing the models, and discuss promotion policies after exploring promising sectors consuming spectrum resources. The research is based on TV white space, which is vacant TV channels in region or time domain and considered as core spectrum resource along with digital terrestrial television switchover. As the result, four kinds of business models were derived, including broadcasting and telecommunication types. Each model was discussed from four standpoints: customer value proposition, profit formula, key resources, and key processes, and the propriety for commercialization was evaluated by three dimensions: technological evaluations, business-oriented evaluations, and user-oriented evaluations. The promotion policies of government and market participants for the activation of TV White space-based business models were discussed as well.