• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.12 no.1
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• pp.217-223
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• 2012

Time synchronization problems is very important in everyday life and a variety of industries, In this paper, we developed PLB(Power Line Broadcasting) system which broadcast time information to each device through power line modems. In our system, the smartphone synchronized to GPS time is used as a time source and we propose, develop and evaluate a relay system to solve the difficulties of long-distance transmission of power line modem technology.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.13 no.4
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• pp.1-7
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• 2013

In the next generation of mobile communication systems, high data rates and high capacity will be possible if multiple antennas are used at new frequencies. This paper presents the correlations between channel parameter path loss (PL), delay spread (DS), angular spread (AS) and K-factor established based on channel measurements. To avoid interference from Korean DTV broadcasting, we measured the channel characteristics in urban/rural/suburban areas on Jeju Island using a channel sounder and $4{\times}4$ antennas. The correlations between channel parameter show that the wireless channel characteristics can be determined and effective communication system design can be produced for use in similar environments.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.9 no.2
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• pp.73-80
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• 2009

Although it is relatively difficult to eavesdrop the commonly used PSTN in that it is connected with direct circuit, it is difficult to ensure the secret of call on Internet because many users can connect to the Internet at the same time. However, it is needed to ensure secret of voice call in a special situation. Due to the fact that many users can connect to the internet at the same time, VoIP can always be in a defenseless state by hackers. Therefore, in this paper, we have developed the increased voice security internet telephone terminal and measured conversation quality by adopting VPN PPTP based on SIP and using tunnel method in transmitting voice data to prevent eavesdrop of internet telephone.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.10 no.4
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• pp.99-104
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• 2010

We introduce Internet TCP/IP control system to monitor the traffic volume on the traffic network system. To check the traffic volume on traffic road, we use the traffic detector system shppe of circle or diamond or rectangular. Nevertheless we use traffic detector, we will use internet addressin TCP/IP system. If we use TCP/IP control system, we acquire many good point, we achive high sircurity and low costness traffic monitoring system coming difficulty and high level position. But internet system is very easy and low cost direction. Traffic control system is very more depending on the high techinquesion and very complexity. Therefore we introducing TCP/IP internet addressing control system schemetic point.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.10 no.2
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• pp.85-96
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• 2010

Satisfaction of computer internet user in Ubiquitous depends on characters which given from web site. In this paper, studying about characteristic of internet web site that influence internet user's satisfaction. Had a research by interviewing and e-mail for a month, at over the 20 ages person who has experience purchasing S/W from shopping mall in internet purchasing site. The research shows the main factor of the user's satisfaction are that communication business combine, information usability, interaction, personalization, mailing list, over the web site characteristics. Finally, this paper suggest that special features and studying limitation of the enterprise web transactions base on the result of the research.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.22 no.4
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• pp.1-8
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• 2022

This study examined the effect of Internet exposure on plastic consumption behaviors, and the mediating effect of social norms. The survey participants in this study were 220 college students. Collected data were analyzed by the SPSS 26.0 and PROCESS macro 4.1 (model 4). The results of this study showed that the relationship between Internet exposure and intention to plastic consumption was mediated by descriptive norms. These results suggest that Internet exposure and social norms are important factors that can promote or constrain plastic consumption behaviors. Based on these results, we presented the theoretical and practical implications of this study.

• International Journal of Internet, Broadcasting and Communication
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• v.14 no.3
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• pp.131-142
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• 2022

This study aims to explore how college students have adjusted to Internet-based learning (IBL) since the pandemic and how they have subjectively experienced their Internet-based classes including live-streaming and recorded classes. We conducted a qualitative study on 16 college students in South Korea. The analysis of the in-depth interviews revealed that despite early negative experiences regarding adjustment to IBL, the participants seemed to have developed an increased sense of control over their learning and simultaneously reported a greater need for self-discipline and social support in order to stay motivated. Also, instructors' digital competence and creative attempts to facilitate class communication and discussion appeared to have influence on successful IBL. Lastly, the participants' physical learning environments seemed to impact their online learning in terms of their level of alertness and motivation for study. Implications and suggestions were discussed.

• International journal of advanced smart convergence
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• v.7 no.4
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• pp.10-18
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• 2018

For the information services supporting requests of data items from a great number of mobile clients, wireless data broadcasting is an effective way because it can accommodate any number of clients. In the wireless data broadcasting, various air indexing schemes and data scheduling schemes have been developed in order to enable the clients to access their desired data items efficiently. The broadcasting system needs a method to simulate newly designed air indexing and scheduling schemes of the system, and to evaluate the performance parameters of the schemes. In this paper, we design an expandable and efficient simulation framework for the wireless data broadcasting based on the partition of data ID space. The framework can adopt regular and irregular space partition and evaluate various performance parameters of the broadcasting system. We implement a testbed of the broadcasting system using the framework, that adopts IIP, GDI and EXP as its air indexing schemes. We simulate the system using the testbed and evaluate the performance parameters of the system. Thus, we show the efficiency and expandability of the designed and implemented framework.

• ETRI Journal
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• v.35 no.2
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• pp.292-300
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• 2013

Augmented reality (AR) is a popular service in mobile devices, and many AR applications can be downloaded from app stores. As TV broadcasting has continued to integrate with the Internet, it has become an area in which the AR concept is able to reside, although in a simple form, such as an advertisement placed in the static region of a scene. There are some restrictions against TV broadcasting realizing AR since TVs are fixed devices and typically do not have GPS, geomagnetic, or acceleration sensors, which are standard equipment in mobile devices. However, the desire to experience AR on a large TV screen has triggered research and development for an ideal AR business model and service type. This paper introduces several use cases for augmented broadcasting services and also presents an augmented broadcasting metadata scheme designed for a broadcasting environment. We also verify some of the use cases and an augmented broadcasting metadata scheme in an implemented augmented broadcasting system based on a hybrid TV platform.

• The Journal of the Institute of Internet, Broadcasting and Communication
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• v.20 no.4
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• pp.23-33
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• 2020

The purpose of this study was to find ways to co-produce ASEAN-Korea co-production in the ASEAN market, which is the market that we should strategically converge in the domestic and overseas environment of the Korean content industry. The research content to achieve the research objective was targeted at viewers of broadcasting programs from five ASEAN countries, and the survey methods were conducted for case-research analysis. First, we analyzed the current status of Korean content broadcasting in five ASEAN countries during the first half of 2018, secondly, the status of use and awareness of Korean broadcasting programs in the five ASEAN countries, fourth, use and awareness of joint broadcasting programs with Korea, and finally, international joint production cases with Korea in the five ASEAN countries. Through this ideal, it is worth suggesting that the Korea-ASEAN joint production should strategically converge under the domestic and international environments currently facing the Korean content industry.