• ETRI Journal
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• v.30 no.2
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• pp.238-248
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• 2008

At the extremes of the complexity-performance plane, there are two exemplary QoS management architectures: Integrated Services (IntServ) and Differentiated Services (DiffServ). IntServ performs ideally but is not scalable. DiffServ is simple enough to be adopted in today' core networks, but without any performance guarantee. Many compromise solutions have been proposed. These schemes, called quasi-stateful IntServ or stateful DiffServ, however, have not attracted much attention due to their inherently compromising natures. Two disruptive flow-based architectures have been recently introduced: the flow-aware network (FAN) and the flow-state-aware network (FSA). FAN's control is implicit without any signaling. FSA's control is even more sophisticated than that of IntServ. In this paper, we survey established QoS architectures, review disruptive architectures, discuss their rationales, and points out their disadvantages. A new QoS management architecture, flow-aggregate-based services (FAbS), is then proposed. The FAbS architecture has two novel building blocks: inter-domain flow aggregation and endpoint implicit admission control.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• v.9 no.2
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• pp.525-527
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• 2005

the multicast services with multiple senders is interested according to the internet services such as multiple audio/video conference services. With the N-plex multicast protocols, multicast session manager is also needed for membership control and session control. RMCP-3 is designed for N:N group communications which is standardizing in ITU-T and supports multiple senders who join sessions. In this paper, we consider requirements of multicast manager for multiplex multicast communication protocol which many a joiner has a role in sender such conference application.

• Korean Management Science Review
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• v.31 no.4
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• pp.75-92
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• 2014

Broadcast-telecommunication bundling services provide customized services and reduce household telecommunication costs, contributing to the improvement of users' welfare. However, following the recent fierce competition of broadcast-telecommunication providers, the Korea Communications Commission, an organization that regulates promotional gifts and fee-reduction benefits to attract subscribers, has imposed a series of regulations. The excessive offering of promotional gifts can distort fair market competition and damage users. Yet if all bundling services are regulated uniformly, some benefits for users may be reduced, and the autonomous marketing competition of service providers may be restricted, thereby shrinking the entire communications market. Therefore, this study attempts to investigate domestic and foreign regulations on promotional gifts and other offerings related to broadcast-telecommunication bundling services, to analyze problems with respect to the current regulations and to propose an improvement plan. The study asserts that it is necessary to improve the violation decision criteria of the Korea Communications Commission and its regulations on broadcast-telecommunication service providers' promotional gifts in order to regulate the bundling services reasonably. In addition, it proposes a proper regulation of the OTS(Olleh TV Skylife) product, a new service emerging in the evolution of the bundling service type.

• Korean Management Science Review
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• v.22 no.2
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• pp.35-49
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• 2005

When new services are introduced, interaction among existing and new services has to be considered. The interaction can be characterized by the substitution or complementary effect among services. This paper analyzes how the interaction among services affects the customers' subscription decision in telecommunication services industry. Based on a face-to-face in-depth survey from a sample of 1,200 respondents, a new wireless internet access service or WiBro is analyzed to identify the substitution/complementary effect in relation to the existing other telecommunication services. Additionally, the important factors explaining both customers' subscription and substitution decisions are identified. The analysis results indicate that males and students are more likely to subscribe WIBro service. Interestingly, family size positively affects the subscription decision. However, heavy users of on-line game are reluctant to subscribe WiBro service. Among the potential WiBro subscribers, the customers who are less satisfied with the existing fixed line broadband internet access service are more likely to stop subscribing the fixed line service, which implies substitution by a new service. We believe that the consideration of the interactions among services is essential to devise a winning strategy for the new services in the highly uncertain telecommunications business environment.

• Electronics and Telecommunications Trends
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• v.19 no.2 s.86
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• pp.101-110
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• 2004

본 연구에서는 통신. 방송 융합의 개념과 통신. 방송 융합 서비스의 현황을 알아보고 통신. 방송 융합 서비스관련 국내외의 분류 기준을 살펴보고자 한다. 또한 대표적인 통신. 방송 융합형 서비스인 위성 DMB 서비스를 실제로 연구에 적용하여, 국내 위성 DMB 서비스 관련 정책환경 분석과 더불어 위성 DMB 서비스와 유사서비스와의 비교를 통해 통신. 방송 융합서비스가 보유하고 있는 차별적 성격을 도출하는 한편, 그 시사점을 제시하고자 한다.

• Journal of Information Technology Applications and Management
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• v.9 no.3
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• pp.57-78
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• 2002

This paper studios billing mechanisms of value-added telephone services In Korea and major foreign countries. The billing methods of toll-free phone service, voice Information service, one number service, personal number service and calling card service ate compared with each other. The results show that several differences are identified among service providers due to the difference of the regulation, numbering mechanism and underlying networks employed. This paper also provides implications and suggestions to incumbent Korean value-added service providers and regulators

• Electronics and Telecommunications Trends
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• v.17 no.5 s.77
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• pp.129-137
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• 2002

최근 모바일 핸드셋을 포함한 모바일 서비스의 보급률이 향상되고, 소비자들의 다양한 요구를 충족시키기 위한 모바일 데이터 서비스들이 우리의 생활전반에 급격히 확산되고 있다. 그 중에서도 MLS(Mobile Location Services)에 대한 미국 정부차원의 의무화 규정과 상업적인 목적에서의 핸드셋 제조업체 및 이동통신 서비스 사업자들의 관심이 고조되고 있으며, 향후 MLS 시장 규모가 급성장할 것으로 전망되고 있다. 이에 본 고에서는 미국의 MLS 관련 기술과 시장 동향을 살펴보기로 한다.

• Electronics and Telecommunications Trends
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• v.17 no.4 s.76
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• pp.81-91
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• 2002

e-Market 플레이스에서 타 업체와 차별화하는 가장 중요한 전략적 수단으로 e-Service가 강조되고 있다. 본 고에서는 이러한 e-Business 환경변화와 맥을 같이하여, 서비스 마케팅의 기본 개념이라 할 수 있는 서비스 특성을 살펴보고, 이어 e-Service의 정의와 범위를 알아 본 후, 현재 제기되고 있는 e-Service 운영에 있어서의 몇 가지 전략 유형을 살펴봄으로써 향후 e-Service에 대한 활발한 논의가 이루어지는 단초를 제공하고자 한다.

• Journal of The Korean Association of Information Education
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• v.13 no.3
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• pp.393-400
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• 2009

As one of leading media converging broadcasting and telecommunications, IPTV is required to pursuit the idea of public interest from broadcasting industry and universal service from telecommunications industry as well as satisfying industrial effect. It needs to consider both industrial effect and public benefit when vitalizing IPTV services. The project of providing IPTV-based interactive public services is expected to enhance accessibility of public services, present shape of new public service in broadcasting-telecommunication convergence environment, resolve the shortage in contents supply which is one of most important problems in IPTV services. In this research understanding the overall response such as service usage status, satisfying/dissatisfying factor, trend of preference of the customer using IPTV-based interactive public services, we analyze what the public service mean in IPTV environment and public identity of IPTV. And we have investigate effective developing method and ripple effect of IPTV-based public services on broadcasting and telecommunications converged ecosystems.

• ETRI Journal
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• v.10 no.1
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• pp.3-13
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• 1988

With the contunuing trends towards an information based society, telecommunications services are becoming an integral part of social activities. So, emphasis on ISDN is growing rapidly and placed on supporting integrated services delivery of different levels to the end user. The end user’s perception of an integraged services delivery(in particular, ISDN services) should reflect three interrelated capabilities, ISDN access capabilities and ISDN network capabilities. For turning the ISDN concept of above capabilities into reality, we have implemented the experimental system on user-network interfaces, which are three kinds of implementations in user access arrangements, namely basic access, intermediate rate multiplexed access and primary rate multiplexed access. Through these implementations, NTE(Network Terminating Equipment) is used for single basic access [2B+D], IMUX (Intermediate rate Multiplexer) for 4 basic accesses [4X(2B+D)] and PMUX(Primary rate Multiplexer) for [10/12 X (2B+D)]. This paper describes the outlines of system features on user access equipments, system architectures of testbed and experiment result of each access arrangements.