• Korean journal of communication and information
• /
• v.23
• /
• pp.47-77
• /
• 2003

Despite the near ubiquity of mobile phone and internet, the 'meta research' that deals with face-to-face(FTF), mobile phone and internet together as interpersonal media is very rare in Korea. This study begin with the purpose of fair repositioning of mobile phone and internet in Korean's interpersonal communication horizon. To accomplish this purpose, We examined the effect of face-to-face communication situation on uses of mobile phone and internet as interpersonal communication media. The related raw data were collected from on-line survey process, and statistically analyzed. The result showed that persons who are more troublesome in FTF communication because of their timidness or personality problem are more restricted in human communication network via mobile phone and internet than the others who are not. And more 'addicted' in internet use and more active in trying another personality(Persona) in cyber space. And more shrunk in meeting and conversation with family members and friends after internet adoption.

• The Journal of Society for e-Business Studies
• /
• v.15 no.2
• /
• pp.37-53
• /
• 2010

As mobile communications service is growing every single year in Korea, it has pulled the interest of many researchers as wells as the executives. This research is aimed to find out factors of the mobile market that affect the utilization of mobile communication. We adopted a survey method with a pinpointed focus on how users' profile and individual experience relates with the utilization of mobile communication. For this objective, first, we primarily analyzed the mobile users' characteristics and service usage patterns. Then, we developed a conceptual model and hypotheses that are empirically examined using a covariance structure analysis, which will contribute to investigating critical success factors in mobile business. Some suggestions constitute the remaining part of this research. First, user characteristic is an important factor that affects the amount expended for mobile service. Second, user experience is another critical aspect that is highly linked with mobile payment. In alignment with our research, we propose user characteristics such as age and income, and user experience about mobile internet usage and mobile contents usage are of great significance in devising both near- and long-term mobile business strategy.

• Management & Information Systems Review
• /
• v.28 no.3
• /
• pp.191-210
• /
• 2009

Internet was first designed only for sending data, but as the time passed, internet started to evolve into a broadband multi-media web that is capable of transmitting sound, video, high-capacity data and more due to the demands of internet users and the rapid changing internet-communication technology. Domestically, in January, 2000 Saerom C&T, launched a free VoIP, but due to limited ways of conversation(PC to PC) and absence of a revenue model, and bad speech quality, it had hit it's growth limit. This research studied VoIP based on technological enhancement in super-speed internet. According to IDC, domestic internet market's size was 80,800 million in 2008, and it formed a percentage of 12.5% out of the whole sound-communication market. in case of VoIP, it is able to maximize it's profit by connecting cable and wireless network, also it has a chance of becoming firm-concentrated monopoly market by fusing with IPTV. Considering the fact that our country is insignificant in MVNO revitalization, regulating organizations will play a significant roll on regulating profit between large and small businesses. Further research should be done to give VoIP a secure footing to prosper and become popularized.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2001.10b
• /
• pp.1443-1446
• /
• 2001

본 논문에서는 5개 이동통신 사업자 식별을 위한 사용자 에이전트와 개인휴대전화를 이용한 유 무선인터넷 통합서버에 의해 각 이동통신사업자를 경유한 유선 포털사이트 또는 특정 사이트(URL 접속)에 직접 접속하여 WAP 또는 ME를 동시에 지원할 수 있는 NT 또는 LINUX 통합서버를 구축한다. 이로서 휴대전화를 이용한 입학관리시스템, 휴대전화를 이용한 만성질환자의 원격 진료시스템, 휴대전화를 이용한 방송 순위집계 시스템과 사용자 참여방법, 시청률 및 여론조사, 무선성경 검색 등의 다양한 컨텐츠의 개발이 용이하고, LINUX/UNIX, NT 서버구축이 단순함으로서 이동전화의 장점인 휴대성으로 시간과 공간의 제약을 벗어나 다양한 무선 인터넷 검색이 가능해 질 것이다.

• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.26 no.7A
• /
• pp.1264-1274
• /
• 2001

본 논문은 국내 시외전화시장을 설명할 수 있는 각 변수를 도출하고 이에 따른 분석모형을 제안하였다. 또한 분석모형을 통해 모의실험을 수행하고 이 결과로 시외전화시장의 활성화 방안을 제시하였다. 모의실험 결과 시외전화의 매출액은 모든 시장구성 변수들의 변동에 비탄력적인 반응을 보이며 매출액의 증가에 대체효과를 보이는 두 개의 변수인 이동전화의 사용과 인터넷 이용자수의 교차탄력도는 추정기간 내내 장단기적으로 모두 0.03 미만으로 이들의 변화에 따라 매출액이 보이는 반응은 예상보다 크지 않은 것으로 밝혀졌다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2001.05a
• /
• pp.575-578
• /
• 2001

Number Portability means that one can use his original telephone number when he change telephone service provider, region and the kind of service. Number portability is not necessary when only one telephone service provider exist in korea. But it is necessary to guarantee pair competition among the service providers as new communication service provider comes. The law which is related number portability is established by government as number portability is considered a tool to guarantee pair competition between old service provider and new service provider. A national standard on number portability with which all service provider can agree is needed. We developed functional standard for that purpose. Functional standard includes call processing structure, network requirement. This paper handle functional standards.

• Proceedings of the Korea Society for Industrial Systems Conference
• /
• 2001.05a
• /
• pp.256-260
• /
• 2001

본 논문에서는 디지털 이동전화(CDMA) 채널환경을 통과한 왜곡된 전화음성에 대해 객관적 음질평가 척도의 개발을 위한 기초 연구로서 기존의 CD(Cepstral Distance), MSD(Mel Spectral Distance), BSD(Bark Spectral Distance), Modified BSD, PSQM(Perceptual Speech Quality Measure)를 대상으로 객관척도 알고리즘을 성능평가 하였다. 이 척도들은 실제 이동전화 환경에서 수집된 PCS 음성데이터에 대해서 적용하였으며 이 결과치를 주관적 음질평가 방법인 MU와 상관성을 비교 조사하였다. 실험 결과, BSD와 MBSD, 그리고 PSQM 척도의 상관성이 각각 0.80, 0.85, 0.84로 나타났으며 CD, MSD 보다 성능이 상대적으로 더 우수함을 보였다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
• /
• 2002.05a
• /
• pp.355-358
• /
• 2002

The network functional standard for MNP defines tile network functional structure and information flow to provide Number portability among the imt-2000 mobile phone. In this paper we define network function and system function and processing method of information which will be changed among them. In this paper, we also defines the processing method of SMS.

• Survey Research
• /
• v.3 no.1
• /
• pp.53-63
• /
• 2002

In this paper we realized an organization of Mobille Phones Survey system and simulated how to make questionnaires in mobile phones with an example. We show a question making program in a simulator with WML(Wireless Markup Language)

• TTA Journal
• /
• s.69
• /
• pp.107-110
• /
• 2000

스마트카드 산업의 경기가 부양되고 있는 가운데, 두 가지의 주요 이동전화 기술을 대표하는 그룹들이 주로 GSM(Global System for Mobile communication) 셀룰러전화에서 사용되는 칩 기반 버전으로 이전해가고 있다.