• The Journal of Korean Institute of Communications and Information Sciences
• /
• v.7 no.4
• /
• pp.135-150
• /
• 1982

Nowadays, The function of telecommunication contributes to maintaining the peace of the world, and the international cooperation in the communication field can not be emphasized too much. The pioneers in telecommunication field dvoted their lives to the infinite love for humanity. However, the modern communication system in our country was initiated, in the later part of the Lee-Dynasty, not for the international cooperation but for the invasive avarices of the neighbouring nations such as Japan and China. The true international cooperation should be based on the love of humanity and the peace of the world such as the pioneers'. This paper proposes to resarch the historic process of initiation and development of the international organs relating to telecommunication as well as the international telecommunication network. Finally, I will make the following suggestions for the promotive direction of the true international cooperation. 1. Intensification of the radio administrative power. 2. Promotion of the international cooperation on the man-power and economy in telecommunication field. 3. Establishment and adjustment of research institutes of telecommunication. 4. Promotion of space communications. 5. Establishment of the world telecommunication network for world-wide peace.

• Journal of the Korea Institute of Information and Communication Engineering
• /
• v.2 no.3
• /
• pp.409-416
• /
• 1998

TMN(Telecommunication Management Network) provides underlying structure to transfer, store and processing management information which are necessary for Telecommunication network and service management. The application of TMN is widely applicable to Analogue telecommunication network Public and private network switching system, Transmission system, Telecommunication related software and logical telecommunication network resource management and others. This paper consider TMN as one System Under Test(SW), and propose a new TMN test architecture, besides existing simulation based test method, which is able to test, on the basis of standardized testing procedure and testing method, directly with test system. There are several fields in protocol testing and one of them is protocol conformance testing which is defined in ISO/IEC 9646 series and it has twin document as ITU X.290 series. To apply this standardized procedure on TMN testing it is prerequisite to devise a new TMN testing architecture and set up testing procedures according to the new architecture.

• ETRI Journal
• /
• v.35 no.2
• /
• pp.234-244
• /
• 2013

Internet protocol television (IPTV) service depends on the network quality of service (QoS) and bandwidth of the broadband service provider. IEEE 802.16j mobile multihop relay Worldwide Interoperability for Microwave Access networks have the opportunity to offer high bandwidth capacity by introducing relay stations. However, to actually satisfy QoS requirements for offering IPTV services (HDTV, SDTV, Web TV, and mobile TV) for heterogeneous users' requests, providers must use a video server for each IPTV service type, which increases the network load, especially bandwidth consumption and forwarding time. In this paper, we present a solution for forwarding IPTV video streaming to diverse subscribers via an 802.16j broadband wireless access network. In particular, we propose a new multicast tree construction and aggregation mechanism based on the unique property of prime numbers. Performance evaluation results show that the proposed scheme reduces both bandwidth consumption and forwarding time.

• Journal of Korean Institute of Industrial Engineers
• /
• v.26 no.4
• /
• pp.345-353
• /
• 2000

ITS(Intelligent Transportation System) is an advanced system which can effectively handle the current transportation and tragic problems. In order to beneficially apply ITS to the current transportation infrastructure we need a telecommunication technology which guarantees high speed data transmission between the road side units and the on-board units in the vehicles. DSRC(Dedicated Short Range Communication) is considered as a promising technology since it has the capability of two-way communication and can serve to implement various ITS services. In this paper, we study an architecture of telecommunication network far ITS based on DSRC. We use the ISCNA(Information Systems and Communication Networks Architecture) framework for the method of approach. We first analyze the requirements for ITS services using DSRC in Korea, and then establish a logical architecture for the network. We also analyze the types of data and process between the network components. Based on these we propose an architecture for the telecommunication network for ITS. We also briefly discuss the simulation which we perform to validate the proposed network architecture.

• Journal of the Institute of Electronics Engineers of Korea TE
• /
• v.37 no.4
• /
• pp.1-10
• /
• 2000

In this paper, an educational-purposed tree-type telecommunication network using the switching system, and the wired and radio transmission systems which are applied is implemented. Also, the proper training method for the network such as the digital full electronic switching training, the networking experiment, the optical transmission experiment, is developed to robust the adaptation ability to the actual various environment of telecommunication network of the trainers. The technical information such as the technical manuals, the user manuals and the maintenance skill reports are collected and database using Oracle DB system for the effective educational use.

• Asia pacific journal of information systems
• /
• v.6 no.2
• /
• pp.125-148
• /
• 1996

This paper is primarily focused on the function of model management systems such as higher level representations and buildings of optimization models using them, especially in the area of the telecommunication network models. This research attempts to provide the model builders an intuitive language-namely higher level representation-using five distinctivenesses : Objective, Node, Link, Topological Constraint including five components, and Decision. The paper elaborates all components included in each of distinctivenesses extracted from structural characteristics of typical telecommunication network models. Higher level representations represented with five distinctivenesses should be converted into base level representations which are employed for semantic representations of linear and integer programming problems in knowledge: assisted optimization modeling system(UNIK-OPT). Furthermore, for formulating the network model using higher level representations, the reasoning process is proposed. A system called UNIK-NET is developed to implement the approach proposed in this research, and the system is illustrated with an example of the network model.

• Journal of Communications and Networks
• /
• v.11 no.2
• /
• pp.187-195
• /
• 2009

The application of mathematical analysis to the study of wireless ad hoc networks has met with limited success due to the complexity of mobility, traffic models and the dynamic topology. A scenario based universal mobile telecommunications system (UMTS) time division duplex (TDD) opportunistic cellular system with an ad hoc behaviour that operates over UMTS frequency division duplex (FDD) licensed cellular network is considered. In this paper, we present a new routing metric which overall improves system performance in terms of interference and routing which operate in an ad hoc network in an opportunistic manner. Therefore we develop a simulation tool that addresses the goal of analysis and assessment of UMTS TDD opportunistic radio system with ad hoc behavior in coexistence with a UMTS FDD primary cellular networks.

• 한국정보통신설비학회:학술대회논문집
• /
• 2002.08a
• /
• pp.130-132
• /
• 2002

기존의 광선로 특성 데이터에 대한 관리는 대부분 지역별 국소별로 수작업에 의존하였기 때문에 처리 절차의 일원화 및 체계화가 제대로 정립되어 있지 않았다. 이로 인해 선로 자원의 사용이 원활하지 못하였고 최적의 망을 구축하는데 많은 시간 인력 및 비용이 소요되는 등 비효율적인 문제점들이 도출 되었다. 이러한 문제점을 해결하기 위해 본 논문에서는 수작업에 의존했던 광 전송로의 특성 정보를 데이터베이스화하여 데이터에 대한 다양한 가공 능력 및 투자에 대한 일관성 있는 의사 결정 능력을 제시하였으며, 구축된 데이터베이스를 통해 최적의 광통신망 설계를 지원할 수 있도록 광전송로 관리 및 설계 처리에 대한 의사 결정 시스템을 제안했다.

• Proceedings of the Korean Society for Quality Management Conference
• /
• 2004.04a
• /
• pp.376-381
• /
• 2004

The goal of this article is to stress the importance of good quality in telecommunication services and to introduce two basic concepts on the service quality in the telecommunication industry: QoS(Quality of Service) and NP(Network Performance) Based on these notions, presented is an integrated scheme for quality improvement in telecommunication services. Tn particular , proposed with this framework Is an efficient and effective establishment of a balanced set of parameters for continuous monitoring and correct ions of service performance.

• Proceedings of the IEEK Conference
• /
• 2007.07a
• /
• pp.11-12
• /
• 2007

OVPN(Optical Virtual Private Network) based on DWDM(Dense Wavelength Division Multiplexing) backbone framework is considered as a promising approach for the future VPN. This paper proposes a new routing algorithm, called PMIPMR (Priority-based Minium Interference Path Multicast Routing) algorithm which finds an alternate route considering node priorities when the congestion is occurred in a network. The PMIPMR algorithm tries to improve blocking probability and wavelength utilization by avoiding congested path for potential future connection requests.