• Journal of the Korean Institute of Navigation
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• v.19 no.4
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• pp.103-121
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• 1995

As Daniel Bell says, that modern society is an information society. In contrast to earlier days, modern society has placed a high value on information and knowledge. Therefore, modern civilization depends largely on information and knowledged, which is the most valuable sources of all intelligence activities. By coordinating a large number of human action, the information creates a powerful social tool. It combines its personnel with its resources and new materials at various level. At the same time, It continually evaluates how well it is performing and tries to adjust itself accordingly in order to achieve social goals. As we shall see, all this allows information to sew the various needs of society. In connection with above mentioned problem consciousness, the study is designed to sew the following purposes. As its title indicates, and perhaps most significant. This study is to review and reinterpret the existing literature on local telecommunication system, networks, and policy direction in order to arrive at a somewhat more general approach to understanding them. In local telecommunications service, the service exploitation and promotion and database development must be accomplished by establishing local telecommunications. If we develop local telecommunications toward the progressing direction, we would dissolve the regional information disparity and could also make the local policy suited for high-intelligence society. It is true of any science that knowledge is never complete. It is also true of a science that knowledge should grow, through systematic reexamination of the body of findings. There are certainly true of this study on the developmental direction for local telecommunication system.

• KSII Transactions on Internet and Information Systems (TIIS)
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• v.11 no.9
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• pp.4197-4219
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• 2017

Cloud computing is a new service to provide dynamic, scalable virtual resource services via the Internet. Cloud market is available to multiple cloud computing resource providers and users communicate with each other and participate in market transactions. However, since cloud computing is facing with more and more security issues, how to complete the allocation process effectively and securely become a problem urgently to be solved. In this paper, we firstly analyze the cloud resource allocation problem and propose a mathematic model based on combinatorial double auction. Secondly, we introduce a trust evaluation mechanism into our model and combine genetic algorithm with simulated annealing algorithm to increase the efficiency and security of cloud service. Finally, by doing the overall simulation, we prove that our model is highly effective in the allocation of cloud resources.

• Journal of Information Technology Applications and Management
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• v.22 no.1
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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.

• The Magazine of the IEIE
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• v.20 no.4
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• pp.85-94
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• 1993

• Journal of Broadcast Engineering
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• v.22 no.6
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• pp.829-849
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• 2017

Due to the large-scale TV display, the convergence of broadcasting and broadband, and the advancement of signal compression and transmission technology, terrestrial digital broadcasting has evolved into UHD broadcasting capable of providing simultaneous broadcasting of fixed UHD and mobile HD. The Korean standard for terrestrial UHDTV broadcasting is based on ATSC 3.0, the broadcasting standard of North America. The terrestrial UHDTV broadcasting standard chose that as a new AV codec standard, HEVC video codec which can compress with higher efficiency compared to AVC, and MPEG-H 3D audio codec for realistic audio. Also, DASH and MMT are adopted as transmission format instead of MPEG-2 TS to support broadband as well as broadcasting network, and in order to provide 4K UHD/mobile HD service simultaneously ROUTE multiplexing technology is applied. In this paper, we propose an audio/video encoder, which is required to provide HDR/WCG supported high quality video service, 10.2 channel/4 object supporting stereo sound service, fixed UHD and mobile HD simultaneous broadcasting service based on ATSC3.0, also we implemented the ATSC 3.0 LDM system for ROUTE/DASH packager, multiplexing system and physical layer transmission/reception, and verified the service ability by applying it to real time broadcast environment.

• Proceedings of the Korea Technology Innovation Society Conference
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• 2001.11a
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• pp.37-57
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• 2001

Digital technology enhanced the improvement of technological aspects in the both broadcasting and telecommunications industries. The infrastructures of each industry converged to one, which impacts not only on technology but also on the broadcasting service. The current broadcasting service is characterized by one-way service, but it'll changed to be customized, or two-way service that reflects the interest of customers. This change requires a new standard to categorize and analyze the future broadcasting service converged and market structure, differing from the present standard based on the transmission channels. This study aims at forecasting the demand of interactive TV service as a representative broadcasting service in the near future, and analyzing the market structure of the broadcasting services. We assume that the present broadcasting and information and telecommunications services such as terrestrial, cable TV, satellite, digital TV services and high-speed broadband service have strong relationship with interactive TV service. First we use Bass diffusion method to predict the diffusion curve of the present five services. Then we analyze the relationship between the present services and interactive TV service by Delphi method. Finally we estimate the potential subscription number of interactive TV service based on the relationship among the services and diffusion parameters.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2003.05a
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• pp.653-657
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• 2003

Mobile Number Portability means a network capability that users can change service provider while retaining a legacy mobile phone number. Therefore, n provides users with convenience to select service provider comparing service's quality and rate without changing a phone number. in our country, 2G MNP service of QoR method is going to serve in January, 2004. In this paper, We describe connection protocol and NMP procedure between SSP and SCP in order to provide 2G MNP service in domestic network

• Electronics and Telecommunications Trends
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• v.25 no.6
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• pp.1-10
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• 2010

서비스 플랫폼이란 응용 서비스를 이용자에게 전달하는 틀로서, 서비스가 생성, 실행, 관리되는 서비스들의 플레이그라운드라 할 수 있다. 본 고에서는 통신 서비스 분야로 한정되어 있던 전통적인 서비스 딜리버리 플랫폼으로부터 통신 기능을 개방하여 인터넷 세상에 연결시키기 위한 개방형서비스 플랫폼, 웹 30.0 시대를 실현하기 위한 시맨틱 서비스 플랫폼에 이르기까지 서비스 플랫폼 기술의 발전상과 사례들을 살펴본다. 이와 같이 서비스 플랫폼의 현실과 미래를 고찰함으로써 이종 산업간 융합 서비스 제공 환경의 실현 기능성과 그 시기를 전망해보고자 한다.

• Electronics and Telecommunications Trends
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• v.14 no.6 s.60
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• pp.51-63
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• 1999

IPSEC (Internet Protocol Security) is a network layer security protocol that is designed to support secure TCP/IP environment over the Internet considering flexibility, scalability, and interoperability. IPSEC primarily supports security among hosts rather than users unlike the other security protocols. Recently, IPSEC is emphasized as one of the important security infrastructures in the NGI (Next Generation Internet). It also has suitable features to implement VPN (Virtual Private Network) efficiently and its application areas are expected to grow rapidly. In this paper, the basic concepts and related standard documents of IPSEC will be introduced.

• Electronics and Telecommunications Trends
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• v.14 no.6 s.60
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• pp.74-86
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• 1999

VPN (Virtual Private Network) is an effort to get some of the advantages of public network – cost saving, scalability, flexibility, and efficient network management as well as some advantages of private dedicated network – fast speed and less security threats. We introduce protocols to implement VPN, pros and cons of VPN, and its application areas. We also explain some tasks and classification criteria that should be considered in deploying VPN, available commercial products and recent industrial trends of VPN.