• 한국조사연구학회:학술대회논문집
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• 한국조사연구학회 2002년도 추계학술대회 발표논문집
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• pp.241-253
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• 2002

1980년대 이후 전 세계적으로 유선 전화가 빠르게 보급되고 다양한 표본 추출 기법들이 개발되면서 자료 수집 방법으로서 전화 조사가 널리 사용되어 왔다. 한편 1990년대 초반 이후 통신기술이 급격히 발전하면서 대부분의 국가에서 핸드폰의 수가 점차적으로 증가했고 특히 최근 수년간에 걸쳐 그 수가 급증했다. 아울러 유선 전화 대신 핸드폰만을 소유하는 전화 가구들이 증가하면서 많은 국가들에 있어 유선 전화 가구 보급률이 감소하고 있다. 본 논문에서는 유럽 연합, 우리나라를 포함한 아시아 지역, 북미 등에서 핸드폰의 증가에 따른 유선 전화 가구 보급률의 변화와 동향을 살펴보고 특히 우리나라에서도 당면할 수 있는 전화 조사상편의 문제를 다룬다.

• 한국조사연구학회지:조사연구
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• 제5권1호
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• pp.27-49
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• 2004

최근 한국을 포함한 여러 국가들에 있어 이동전화가 빠르게 보급되면서 유선전화가구보유율이 감소하고 있다. 이러한 유선전화 보유율의 감소로 인하여 표집틀의 중요한 비포함문제가 발생되고 결국 조사 추정치의 편향이 커질 수 있다. 본 논문에서는 먼저 국내에서의 유선전화 가구보유율과 이동전화 가구보유율의 변화를 살펴보고, 사회인구학적 가구 특성에 따른 이들 전화 가구보유율의 변화도 알아본다. 아울러 이로 인한 국내에서의 유선전화 표집틀 비포함 수준의 변화와 문제점들을 언급한다. 다음 유럽연합의 일부 국가들과 미국, 캐나다 등의 최근 유선전화 가구보유율을 비교한다. 마지막으로 국내의 이동전화 증가에 따른 전화조사환경의 변화에 대응하기 위한 앞으로의 연구방향을 제시한다.

• 한국통신학회논문지
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• 제34권1B호
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• pp.34-46
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• 2009

The remarkable growth of Korean telecommunication market has based on the introduction of competition as well as mobile technology like CDMA. It was well Down that such a conspicuous growth has been towed by mobile service rather than fixed telephone service. In telecommunications service the number of subscribers to mobile was over 40 millions in 2006 and also, while the traffic amount of fixed telephone has been more decreased, that of mobile, which already outnumbers the fixed, has been constantly increased and will be much more in future. It will accelerate the substitution of access and call demand of fixed service by mobile. This change of technology and demand does affect directly the market performance of telecommunications. And regulation has also an effect on market structure, which finally affects on market performance. In this paper we suppose the fixed and mobile telecommunications services are in a same industry. After reviewing the relations among the demand, cost, charge structure and revenue structure in the one fixed and mobile telecommunications market using the framework of an industrial structure analysis, we discuss the current issues of telecommunications regulation and implications for the future regulation.

• ETRI Journal
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• 제10권4호
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• pp.146-160
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• 1988

The purpose of the present study is to build a model to determine the structure of long-term quasi-optimal rates of local and toll telephone services. The outline of this study is as follows : Telephone business, providing social goods, is capital-intensive industry which needs huge fixed cost to operate exchanges and telephone networks nationwide. The nature of above industry justifies the market structure of telephone business to be natural monopoly and makes a good reason for government's direct regulation, that is, price regulation. Three is a gap between the present rates and the quasi-optimal ones because some administrative processes intervene in rate making process before execution. On the above diagnostic basis, the present study made an empirical test for the optimality of present rates structure in connection with Ramsey-Boiteux model to maximize the sum of producer's and consumer's surplus and also the current study proposed a qusasi-optimal rates structure for better market performance. From the empirical analysis, we can deduce a policy recommendation the local price should be increased to 47% whereas toll price decreased to 24% in order to improve the net welfare worth of 32.6 billion won.

• 한국조사연구학회지:조사연구
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• 제9권1호
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• pp.1-22
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• 2008

우리나라의 거의 모든 전화조사는 전화번호부를 표본추출의 틀로 쓰고 있는데 전화번호부의 등재율이 낮아 포함오류(coverage error)가 심각한 실정이다. 전화번호부 기반 전화조사에 대한 대안으로 미국 등에서는 임의번호걸기(RDD: Random Digital Dialing) 전화조사를 하지만 우리나라에서는 아직 하지 않고 있다. 본 연구의 목표는 다음 두 가지이다. 첫째, 우리나라 전화번호 체계에 맞는 RDD 전화조사 방법을 제안한다. 둘째, 실제 RDD 전화조사를 시행하여 전화번호부 등재 응답자와 비등재 응답자의 사회 인구적 특성과 사회 심리적 성향을 비교해 본다. 조사결과를 요약하면 다음과 같다, 1) 전화번호부의 모집단 포함율은 60% 이하로 추정되었다. 2) 비등재 가구의 소득이 등재 가구의 소득에 비해 다소 큰 것으로 나타났다. 3) 비등재 가구의 가구원 수가 등재 가구의 가구원 수에 비해 다소 많았다. 4) 비등재 번호 응답자들이 등재 번호 응답자들에 비해 개인정보에 대한 침해우려 수준이 다소 높았다. 5) 이념성향에서 비등재 번호 응답자들이 등재 번호 응답자들에 비해 진보적인 경향이 있었다. 이와 같은 사실로부터 전화번호부에 기초한 표본추출이 사회경제적 측면에서 편향된 결과를 산출해 내고 있음을 알 수 있다.

• 한국도로학회논문집
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• 제18권6호
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• pp.173-180
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• 2016

OBJECTIVES : Fixed roadside objects are a threat to drivers when their vehicles deviate from the road. Therefore, such roadside objects need to be suitably dealt with to decrease accidents. This study determines the factors affecting the severity of accidents because of fixed roadside objects. METHODS : This study analyzed the crash severity impact of fixed roadside objects by using ordered probit regression as the analysis methodology. In this research, data from 896 traffic accidents reported in the last three years were used. These accidents consisted of sole-car accidents, fixed roadside object accidents, and lane-departure accidents on the national highway of Korea. The accident severity was classified as light injury, severe injury, and death. The factors relating to the road and the driver were collected as independent variables. RESULTS : The result of the analysis showed that the variables of the crash severity impact are the collision location (left side), gender of the driver (female), alcohol use, collision facility (roadside trees, traffic signals, telephone poles), and type of road (rural segments). Additionally, the collision location (left side), gender of the driver (female), alcohol use, collision facility (street trees, traffic signals, telephone poles), and type of road (rural segments), in order of influence, were found to be the factors affecting the crash severity in accidents due to fixed roadside objects. CONCLUSIONS : An alternative solution is urgently required to reduce the crash severity in accidents due to fixed roadside objects. Such a solution can consider the appropriate places to install breakaway devices and energy-absorbing systems.

• 전자통신동향분석
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• 제35권6호
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• pp.68-77
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• 2020

Along the advancement of mobile networks, fixed telephone networks are gradually advancing from legacy networks based on copper and circuit-switches to optical cables and packet-switched IP networks. Incumbent fixed-line telephone operators are facilitating the introduction of IP networks and are gradually converting to IP-based facilities according to the investment plans for each operator. As the PSTN's IP conversion exceeds a certain level and VoIP; (an alternative service); is activated, some countries; such as Europe; are considering terminating the PSTN service, centering on operators. In this paper, trends in the procedure, timing, and major issues related to the termination of an overseas PSTN are examined. The domestic status is also examined.

• 한국통신학회:학술대회논문집
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• 한국통신학회 2004년도 하계종합학술발표회논문초록집
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• pp.181-181
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• 2004

• 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.

• ETRI Journal
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• 제28권6호
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• pp.777-786
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• 2006

Since the introduction of competition in the telecommunication market due to the growth of the interconnection between heterogeneous networks, particularly fixed and mobile networks, the interconnection charge based on traffic-sensitive (TS) and non-traffic-sensitive (NTS) costs has become more important. Although there have been many studies of the public switched telephone network (PSTN), previous studies of TS and NTS costs in mobile networks are very few. In this paper, as a pilot study, we propose three criteria and a procedure for the classification of TS and NTS costs based on mobile systems. The three criteria are the following: function type, investment requirement, and main exhaust driver. Moreover, for a CDMA mobile system, strongly TS, strongly NTS, and mixed components are classified by the proposed criteria and procedure. The proposed criteria, procedure, and classification can provide a systematic and useful guideline to decide the scope of mobile facilities and to determine the terminating cost on mobile networks from fixed networks.