• Proceedings of the KIEE Conference
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• 1996.07b
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• pp.1330-1332
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• 1996

Power telecommunication networks is being increased rapidly in that expansion of power plant according to the growth of electric power supply. The requirement of power plant operation & office automation make it to complex and confusing to operate. So, for the sake of correspond to the change, it is necessary that telecommunication network should be high reliable and managed effectively. In this paper, we suggest total reliability evaluation models for power telecommunication network which is based on the QOS(quality of service) standardization techniques recommanded by ITU-T.

• Journal of the Korea Society of Computer and Information
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• v.6 no.3
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• pp.29-34
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• 2001

Competition is increasing in telecommunication service market. Effective customer retention strategies are based on a clear understanding of customer defection. Data mining offers service providers great opportunities to get closer to customer. In this paper, we propose an efficient data mining algorithm using neural network. Especially Analysis of CRM Using Neural Networks in Telecommunication service Market and a practical application of neural network is described telco, churn management This paper builds model of customer defection management and analyzes customer defection with data mining

• Proceedings of the Korea Information Processing Society Conference
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• 2001.04b
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• pp.607-610
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• 2001

본 논문은 현재 사용되는 라우팅 프로토콜을 이용하여 MPLS망에서 다중 LSP를 설정할 수 있도록 CLSR을 정의하고, CLSR을 이용하여 트래픽을 분산시킬 수 있는 방안을 제안했다. 이 방식을 통하여 MPLS망의 전체 Throughput을 향상시킬 수 있으며, fast rerouting에서 재 라우팅 되는 플로우가 입구 LSR을 거쳐야 하는 단점을 보완함으로써 기존의 fast rerouting 방식에 비해 평균 재전송 시간을 단축시킴으로써 성능을 향상시켰다.

• Proceedings of the Korean Information Science Society Conference
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• 2012.06b
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• pp.167-168
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• 2012

최근 들어 생활 전반이 인터넷을 사용하지 않고는 이루어질 수 없는 상황이 되면서 네트워크 관리의 중요성이 날로 부각되고 있다. 네트워크 관리시스템(NMS)은 이러한 네트워크를 효율적이고 안정적으로 관리, 운영하기 위하여 매우 중요하다. 본 논문은 네트워크 관리시스템에 대한 소프트웨어 품질검증 사례를 통해 그 중요성을 살펴보고자 한다.

• Proceedings of the IEEK Conference
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• 2006.06a
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• pp.189-190
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• 2006

본 논문에서는 유비쿼터스 사회로의 출발점인 '홈네트워크'를 구축하는데 있어서 가장 기본이 되는 홈서버와 센서간의 인증을 구현하는데 목적을 두었다. 홈 서버와 센서간에 통신을 할 때 해쉬함수 중 MD5를 통해 그룹키를 생성하고 그룹키를 조도센서에 적용하여 서버와 센서간의 인증이 이뤄지는 것을 확인하였다.

• Proceedings of the IEEK Conference
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• 2007.07a
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• pp.139-140
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• 2007

A purpose of this paper is to research a location estimation algorithm of node which considers outdoor environments. After analyzing existing range based location estimation algorithm and their performances, we proposed a suitable algorithm to outdoor environment.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.45 no.5
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• pp.1-11
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• 2008

Wireless Sensor Networks is applied to improvement of life convenience or service like U-City as well as environment pollution, tunnel and structural health monitoring, storm, and earthquake diagnostic system. To increase the usability of sensor data and applicability, mobile devices and their facilities allow the applications of sensor networks to give mobile users and actuators the results of event detection at anytime and anywhere. In this paper, we present MUSNEMO(Multi-sensor centric Ubiquitous Smart sensor NEtwork using Mobile devices) developed system for providing more efficient and valuable information services with a variety of mobile devices and network camera integrated to WSN. Our system is performed based on IEEE 802.15.4 protocol stack. To validate system usability, we built sensor network environments where were equipped with five application sensors such magnetic, photodiode, microphone, motion and vibration. We also built and tested proposed MUSNEMO to provide a novel model for event detection systems with mobile framework.

• Journal of The Institute of Information and Telecommunication Facilities Engineering
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• v.5 no.1
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• pp.13-24
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• 2006

This paper proposes a wireless management system for a pet dog using wireless sensor network. The developed intelligent wireless management system is compose of a central control system, auto-feeder, miniguidance robot, and wireless sensing devices. The developed system uses three types of sensed data such as light, temperature, md sounds from a pet dog and surrounded environment respectively. The presented design method using these data provides an efficient way to controlling and monitoring the pet dog. The implemented system can be used as a design framework of portable device for the pet management.

• Journal of the Korean Operations Research and Management Science Society
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• v.22 no.3
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• pp.23-36
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• 1997

In the design of telecommunication network, the network configuration using hubbing topology is useful for designing and managing the network efficiently : i. e. all of central offices (COs) are grouped into clusters. Each cluster has one hub consisting of large-scale transmission facilities like digital cross-connect systems and ATMs. In clustering process, the community of interest and geographical factor should be considered. However, there exists a tradeoff between two factors. One is to minimize total link costs for geographical factor and the other is to maximize the total intra-cluster traffics for community of interest. Hence, this can be solved by multiobjective linear programming techniques. In this paper, the problem under considerations is formulated as two p-median subproblems taking into considerations total costs and total intra-traffics, respectively. Then we propose the algorithm to solve the problem based on the concept of cost-traffic tradeoff. The algorithm enables to identify efficient cost-traffic tradeoff pairs. An illustration is also presented.

• Journal of The Institute of Information and Telecommunication Facilities Engineering
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• v.7 no.1
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• pp.1-13
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• 2007

This paper proposes a wireless management system for a pet dog using wireless sensor network. The developed intelligent wireless management system is compose of a central control system, auto-feeder, mini-guidance robot, and wireless sensing devices. The developed system uses three types of sensed data such as light, temperature, and sounds from a pet dog and surrounded environment respectively. The presented design method using these data provides an efficient way to controlling and monitoring the pet dog. The implemented system can be used as a design framework of portable device for the pet management.