• 한국기술혁신학회:학술대회논문집
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• 한국기술혁신학회 2001년도 춘계학술대회:발표자료
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• pp.41-58
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• 2001

The growth of fixed telephony has been steady but unexceptional. The number of mobile telephone subscribers, however, has increased dramatically throughout the decade. The increasing prevalence of mobile communications, in conjunction with the relatively high penetration of fixed telephony, will cause the market for converged services to become significant in coming decade. The current fixed and mobile regulatory regimes are very different. Regulation of the fixed market tends to focus on monitoring the activities of incumbent operator and ensuring that other operators can compete on a fair basis. Mobile markets have historically been more competitive, and the asymmetric nature of regulation of these markets has not been as prevalent as for fixed communications. The purpose of this paper is to identify the fixed-mobile convergence and to suggest the future regulatory principles for fixed-mobile convergence.

• 한국지능정보시스템학회:학술대회논문집
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• 한국지능정보시스템학회 2004년도 추계학술대회
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• pp.323-330
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• 2004

As mobile market grows more and more fast, the mobile contents market, especially music contents for mobile phones have recorded remarkable growth. In spite of this rapid growth, mobile web users experience high levels of frustration to search the desired music. New musics are very profitable to the content providers, but the existing collaborative filtering (CF) system can't recommend them. To solve these problems, we propose an extended CF system to reflect the user's real preference by representing the characteristics of users and musics in the feature space. We represent the musics using the music contents based acoustic features in multi-dimensional feature space, and then select a neighborhood with the distance based function. Furthermore, this paper suggests a recommendation for procedure for new music by matching new music with other users' preference. The suggested procedure is explained step by step with an illustration example.

• Journal of Information Technology Applications and Management
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• 제24권2호
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• pp.81-96
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• 2017

Forecasting long-term mobile service demand is inevitable to establish an effective frequency management policy despite the lack of reliability of forecast results. The statistical forecasting method has limitations in analyzing how the forecasting result changes when the scenario for various drivers such as consumer usage pattern or market structure for mobile communication service is changed. In this study, we propose a dynamic model of the mobile communication service market using system dynamics technique and forecast the future demand for long-term mobile communication subscriber based on the dynamic model, and also experiment on the change pattern of subscriber demand under various scenarios.

• 한국정보처리학회:학술대회논문집
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• 한국정보처리학회 2006년도 추계학술발표대회
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• pp.455-458
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• 2006

John Carmack who invented the 3D games let us know about the great 3D world and because of the MIDP 2.0(Mobile Information Device Profilers entering, it is not a fame to achieve playing 3D games with a mobile device. The data offered by iResearch market consultation show that the figure of mobile game players all around the world will take a steady increase from 290 million in 2005 to 1030 million in 2008, and the market income will mount up from $10,200 million to $52.000 million.3D games will be a current, the most famous kind of mobile games. In this paper I design 3D application based on J2ME (Java 2 Micro Edition) and implement a freely removable 3D object which happened in a 3D scene by receiving the keyboard response of mobile device with WTK (Wireless Too.Kit) simulator.

• 디지털융복합연구
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• 제10권10호
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• pp.147-154
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• 2012

한국형 SNS의 성장 가능성을 알아보기 위해 국내 1위 모바일 IM인 카카오톡 사례를 중심으로 분석해본 결과 다음의 사항들을 발견할 수 있었다. 첫째, 카카오톡은 PC상의 메신저 서비스와 다르게 모바일 IM 서비스를 바탕으로 소셜서비스 회사로 진화하고 있었다. 둘째, 카카오톡은 다양한 소셜서비스(사진기반 카카오스토리, 게임 마케팅 플랫폼 게임센터 등)를 시도하여 성공적으로 SNS 회사로 안착하였다. 셋째, 트위터의 사례처럼 플러스친구를 통한 뉴스 서비스, 아바타 및 앱스토어 등을 통해서 소셜미디어 및 소셜플랫폼 회사로 진화하고 있었다. 이런 한국시장에서 카카오톡의 성공은 NHN의 라인을 통해 일본 및 동남아시장에서 확대 재생산되고 있다. 라인은 카카오톡의 다양한 검증된 SNS 실험들을 일본시장에 적용시킴으로써 그 성공을 이어가려고 하고 있다. 온라인 웹서비스 싸이월드가 SNS로 세계시장에서 이루지 못한 것을 모바일 IM인 카카오톡, 라인은 그 성공 가능성을 한층 높여 주고 있다.

• 경영과학
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• 제22권1호
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• pp.179-197
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• 2005

This study examines market acceptance for DMB service, one of the touted new business models in Korea's next-generation mobile communications service market, using adoption end diffusion of innovation as the theoretical framework. Market acceptance for DMB service was assessed by predicting the demand for the service using the Bass model, and the demand variability over time was then analyzed by integrating the innovation adoption model proposed by Rogers (2003). In our estimation of the Bass model, we derived the coefficient of innovation and coefficient of imitation, using actual diffusion data from the mobile telephone service market. The maximum number of subscribers was estimated based on the result of a survey on satellite DMB service. Furthermore, to test the difference in diffusion pattern between mobile phone service and satellite DMB service, we reorganized the demand data along the diffusion timeline according to Rogers' innovation adoption model, using the responses by survey subjects concerning their respective projected time of adoption. The comparison of the two demand prediction models revealed that diffusion for both took place forming a classical S-curve. Concerning variability in demand for DMB service, our findings, much in agreement with Rogers' view, indicated that demand was highly variable over time and depending on the adopter group. In distinguishing adopters into different groups by time of adoption of innovation, we found that income and lifestyle (opinion leadership, novelty seeking tendency and independent decision-making) were variables with measurable impact. Among the managerial variables, price of reception device, contents type, subscription fees were the variables resulting in statistically significant differences. This study, as an attempt to measure the market acceptance for satellite DMB service, a leading next-generation mobile communications service product, stands out from related studies in that it estimates the nature and level of acceptance for specific customer categories, using theories of innovation adoption and diffusion and based on the result of a survey conducted through one-to-one interviews. The authors of this paper believe that the theoretical framework elaborated in this study and its findings can be fruitfully reused in future attempts to predict demand for new mobile communications service products.

• 한국전자거래학회지
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• 제17권2호
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• pp.63-72
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• 2012

2000년대 초반부터 한국의 이동통신시장은 급속하게 팽창해 왔으며, 최근 들어 그 성장 속도가 둔화되고 있으나 성장은 계속 진행 중에 있다. 이와 같은 환경에서 4세대 이동통신 서비스가 2011년 10월부터 시작되어 3세대 서비스와 4세대 서비스가 함께 존재하고 이를 통해 이동통신시장의 경쟁구도가 더욱 복잡하고 치열한 상황이 되었다. 본 연구는 다세대 확산 모형을 활용하여 3세대 및 4세대 이동통신 서비스 가입자 규모를 예측하는데 목적이 있다. 이를 위해 세 개의 파라미터, 즉 Norton and Bass 모형[11]에서 사용되는 혁신계수, 모방계수 및 포화수준계수의 값을 추정하기 위해 3세대에서 4세대로 대체되는 서비스 대체의 유사 사례를 역추적하는 방법을 사용하였다. 시뮬레이션 결과, 다세대 확산모형과 유사사례 추론을 통해 신규서비스인 4세대 이동통신서비스 시장규모를 성공적으로 예측할 수 있었다는 결론을 얻었다.

• 한국통신학회논문지
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• 제31권10B호
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• pp.900-908
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• 2006

본 논문에서는 이동성을 보장하면서 다양한 멀티미디어 서비스 및 컨텐츠를 지원하는 서비스들이 거의 동시에 상용화되는 상황에서 향후 이들 서비스의 시장경쟁구도가 어떻게 형성될 것인지에 대해 예측해 보고자 한다. 미래 시장경쟁구도 예측을 위해서 과거 정보통신사업에서 시장자료에 근거하여 판단하는 방법을 지양하고, 소비자 선호에 근거하는 선택확률모형을 적용하는 접근법을 시도함으로써 유사 서비스들의 경쟁양상을 보다 정확하게 분석할 수 있는 계기를 마련하였다. 분석결과, 서비스들간의 대체효과, 유인효과, 외부영향 요인에 따른 변화 양상 등을 예상할 수 있었고, 이들을 근거로 하여 기업전략 방향이나 정부정책 수립에 대해 전반적으로 나아갈 방향을 제시하였다.

• Journal of Information Technology Applications and Management
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• 제22권1호
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• pp.61-76
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• 2015

In general universal service in telecommunications means a regulatory tool to secure the availability of basic communication services like fixed telephony at an affordable price throughout a country. A re-evaluation of the scope of existing universal service, however, is becoming a core issue as the penetration and usage of broadband and mobile communications matures and a new ICT ecosystem emerges. This study examined whether the universal service polices in Korea need adapting and updating to include broadband and mobile telephony in the universal service, which is based on the necessary and sufficient conditions derived from previous research and foreign countries' experiences : geographical ubiquity of a certain service and the market's ability to provide the service. The result shows the nationwide ubiquity of broadband and mobile communications exists but the ultimate goal pursued by universal service polices trying to make them available and affordable for all is being fulfilled by market dynamics in Korea. Thus, the inclusion of both services in the scope of universal service is regarded as an unnecessary regulation at present time and the expansion of universal service could be addressed as a long-term issue depending on market conditions in the future.

• 정보화연구
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• 제9권3호
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• pp.303-321
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• 2012

시나리오 방법론은 빠르고 복잡하게 변화화는 경영환경 하에서 기업을 지원해 주는 가장 효과적인 툴 중에 하나이다. 특히, 시나리오 방법론은 불확실한 상황에서 의사결정시 보다 효과적이다. 이 논문은 기업의 관리자들이 어떻게 시나리오 기반의 기업 전략을 수립 할 수 있는지 보여 준다. 한국의 무선 통신 서비스 시장의 가상 이동 망 사업자 (MVNO: Mobile Virtual Network Operator)의 사례를 들어 설명하였다. 또한, 시나리오 기반 관리에 대한 이론적 고찰을 하였으며, 전략적 관리 프로세스에 시나리오 방법론을 통합하는 방법론에 대해 논의하였다. 특히, 시나리오에서 상황을 결정짓는 다양한 중요 요소들과 흐름들을 새롭게 고안된 방법론을 통하여 발견하였고, 이를 통해 새로운 전략들을 도출하였다.