• 한국정보통신설비학회:학술대회논문집
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• 2007.08a
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• pp.323-326
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• 2007

Mobility Anchor Points are used for the mobility management in HMIPv6 networks. Currently a mobile node selects the MAP farthest away from itself as a new MAP among available candidates when it undertakes a macro handoff. With this technique, however, the traffic tends to be concentrated at a MAP with the largest domain size and the communication cost increases due to the distance between the mobile node and the MAP. In this work, we proposed a cost effective MAP selection scheme. When leaving the current MAP domain. the mobile node calculates the optimum MAP domain size to minimize the local mobility cost at the new MAP domain considering mobile node's velocity and packet transmission rate. The mobile node then selects a MAP domain of size close to the optimum domain size calculated among the candidate MAP domains. In this way, it is possible for the mobile node to select an optimal MAP adaptively taking the network and node states into account, thus reducing the communication cost.

• The Journal of Korean Institute of Communications and Information Sciences
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• v.30 no.5B
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• pp.324-329
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• 2005

In the traditional telephone services, the settlement method for usage of facilities has been systematically and reasonably arranged based on the cost. Through the advanced technology, the telecommunication services such as the convergence of voice-data, wire-wireless, communication-broadcasting, etc are offering. So, new settlement method in the broadband convergence network (BCN) should be necessary. This paper suggests inter-companies settlement method in the broadband network using interconnection bandwidth and transmission distance factor. By reflecting the facility cost weight on each BCN level, the cost settlement for various services can be easily done. As the settlement model for BCN, the inter-companies interconnection and settlement can be normalized by interconnection bandwidth and transmission distance factors.

• Journal of the Optical Society of Korea
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• v.2 no.2
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• pp.80-82
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• 1998

A new fiber coupling scheme using thermally over-expanded core(TOEC) fiber was proposed and demonstrated. In the coupling experiment between 1.3${\mu}{\textrm}{m}$ FP-LD and the proposed TOEC fiber with a tapered hemispherical microlens. superior performances such as a long working distance, a high coupling efficiency, and large misalignment tolerances were verified experimentally.

• 제어로봇시스템학회:학술대회논문집
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• 2003.10a
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• pp.1638-1642
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• 2003

In this paper, we have analyzed the power spectra and evaluate the performance of DTMF receiver by using the quick Fourier transform(QFT) algorithm. The economical signals detection of dual-tone multifrequency(DTMF) receiver is an important factor when developing cost-effective telecommunication equipment. In experimental results, it shows that reducing memory waste and can process the real-time.

• Journal of the Korean Institute of Telematics and Electronics B
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• v.29B no.11
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• pp.65-72
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• 1992

The economical detection of dual-tone multifrequency(DTMF) signals is a important when developing cost-effective telecommunication equipment. This paper propose that the modified M-channel Goertzel algorithm can reduces the real-time processing and memory waste. By using this M. G. algorithm, it will compare and evaluate to the performance of the digital DTMF receivers using the G. A.

• 한국정보통신설비학회:학술대회논문집
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• 2007.08a
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• pp.211-214
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• 2007

Development of IT and electronics industries has make our life more convenient, yet at the cost of radio communication noise, malfunctioning of electronic appliance and risks against human health all resulting from EMI. Many states are tightening their EMI (Electro Magnetic Interference) regulations around the world and the EMI regulatory measures are likely to increase in terms of targets and types. Against this backdrop, this paper aims to introduce fundamental and adequate EMI countermeasures encompassing product production cycle from design to production stage.

• Proceedings of the Korean Operations and Management Science Society Conference
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• 2003.11a
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• pp.309-312
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• 2003

최근 통신시장의 급격한 변화로 요금 및 접속료 산정에 원가정보가 되는 회계분리의 규제 및 기준이 역사적 원가회계에서 현행원가회계 개념으로 바뀌고 있으며 이에 따라 많은 나라에서 현행원가 회계정보 시스템을 준비하고 있다. 하지만 우리나라의 경우 이에 대한 연구가 미흡한 실정이다. 따라서 본 고에서는 원가회계 및 회계분리의 개념들을 살펴보고 해외사례를 통해 최근의 동향을 살펴봄으로써 향후 우리나라가 회계분리 규칙 및 기준을 제개정할 때 고려해야할 개선방안을 제시하고자 한다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.9 no.7
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• pp.1524-1528
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• 2005

In this paper, we analyses of a traffic for authentication signaling in third generation mobile sensor network. In universal mobile telecommunication system, authentication functions are utilized to identify and authentication a mobile station and validate the service request network services. The authenticating parties are the authentication the serving general packet radio service support node access the authentication center to obtain the authentication with the mobile station. In this paper, we propose that the automatic cost-effective solution size of the authentication vector array.

• Journal of the Korean Institute of Telematics and Electronics S
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• v.34S no.10
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• pp.26-32
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• 1997

The economical detection of dulal-tone multifrequency(DTMF) signals is an important factor when developing cost-effective telecommunication equipment. Each channel have independently a DTMF receiver, and it informs the detected signal to processors of the TDX. This paper proposes the linear prediction algorithm for the spectrum analysis. As a experimental resutls, it can obtain the improved performance to the DTMF receivers and reduce the real-time processing and memory waste.

• Electronics and Telecommunications Trends
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• v.13 no.2 s.50
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• pp.81-89
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• 1998

1996년의 미국 통신법 개정에 따라 FCC에서는 보편적 서비스에 대한 보조비용 산정방법을 개편하려는 노력이 연방합동위원회를 중심으로 추진되고 있다. 이에 따라 기본적인 통신서비스 비용 산정의 필요성이 제기되고 각 통신회사들을 중심으로 비용산정 모델을 개발하고 있다. 대표적인 모델로는 BCPM과 Hatfield 모델 등이 있는데, 본 고에서는 BCPM에서 사용한 기본적인 비용산정 방식에 대한 소개와 아울러 비용 모델들의 장단점을 분석한다.