• Journal of the Korea Institute of Information and Communication Engineering
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• v.14 no.11
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• pp.2379-2384
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• 2010

The reception quality of broadcasting in car radio system may become poor due to the noise such as week signal strength, multipath, Adjacent Channel and so on. To improve this, some european nations and US. serve RDS(Radio Data System) on FM radio, AF(Alternative Frequency) and PI(Programme Identification) code contained information in RDS data are used to switch to the broadcasting having the best reception quality. There are many techniques and studies of maintaining the best reception quality. But many previous techniques are no longer the best way because RF chips are improved every year and noise components can be distinguished in detail. So this research will suggest the best switching technique to maintain the best reception quality.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2010.05a
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• pp.127-130
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• 2010

The reception quality of broadcasting in car radio system may become poor due to the noise such as week signal strength, multipath, Adjacent Channel and so on. To improve this, some european nations and U.S. serve RDS(Radio Data System) on FM radio. AF(Alternative Frequency) and PI(Programme Identification) code contained information in RDS data are used to switch to the broadcasting having the best reception quality. There are many techniques and studies of maintaining the best reception quality. But many previous techniques are no longer the best way because RF chips are improved every year and noise components can be distinguished in detail. So this research will suggest the best switching technique to maintain the best reception quality.

• Proceedings of the Korean Information Science Society Conference
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• 2005.11a
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• pp.112-114
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• 2005

In today's hyper-competitive business environment, Radio Frequency Identification (RFID) technology is expected to enhance the operation efficiency of supplying chain management in both manufactures and retail industries. However, the widespread deployment of RFID tags may create new threats to user privacy, due to the powerful tracking capability of the tags. Many authentication protocols for RFID have been proposed. They are helpful preventing passersby being scanned to determine what articles they are carrying. However, most of them would not prevent the bigger physical tracking problem of RFID, especially when being tracked by the 'constellation' of products they carry. We proposed this RFID scheme to prevent these tracking problems.

• Journal of the Korean Society of Manufacturing Technology Engineers
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• v.21 no.2
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• pp.297-304
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• 2012

Recently RFID (Radio Frequency Identification) technology advances in wireless communication technologies are bringing new challenges. But RFID tag packaging technology has been lagging compared to the demand, so this technology is being required to improve reliability. In this paper, reliability comparison among 11 types of most commonly used epoxy molding in electrical/electronic components packaging has been made through analysis of confidentiality using a humidity sensor. Consequently, the variation of moisture penetration time causes has been verified by the changes in molding thickness for 3 types of epoxy, and from the result, the best experimental results were observed in terms of confidentiality. Moreover we have been confirmed the relationship between confidentiality, the molding thickness, and thermal property of epoxy through thermal analysis.

• Journal of the Korea Computer Industry Society
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• v.5 no.8
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• pp.819-828
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• 2004

Recently, while research for the ubiquitous networking and ubiqutous computing is gone with activity, RFID(Radio Frequency IDentification) that recognize movement of things and take position advantage of RFID echnology in ubiquitous environment are required. In this paper, we propose and design a system that can taking customer's position in large size mart and analyzing customer's shopping movement to manage customer and merchandise of most suitable.

• Proceedings of the Korean Society of Precision Engineering Conference
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• 2005.06a
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• pp.1478-1482
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• 2005

Since it is a very issue that figures out a current position of mobile robots, various methods have been proposed until nowadays. This paper proposes the sensor model of RFID(Radio Frequency Identification) and position estimation algorithm for mobile robots. We designed the sensor model of RFID in experimenting repeatedly. The sensor model of RFID in this case is that of stochastics according to sensing rate. Based on this stochastic sensor model, we designed the algorithm which estimates distance and direction of RFID tag. Therefore we made sure that RFID tag is used as landmark.

• Proceedings of the Korea Institutes of Information Security and Cryptology Conference
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• 2006.06a
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• pp.761-764
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• 2006

무선 주파수 인식 (RFID : Radio Frequency Identification) 시스템은 유비쿼터스 시스템 환경에서 중요한 기술로 주목 받게 될 것이다. 최근에는 이런 RFID 시스템과 모바일 시스템이 결합하여 새로운 모바일 RFID 시스템이 소개되었다. 모바일 RFID (Mobile Radio Frequency Identification) 시스템은 모바일 기기에 RFID 시스템이 접목된 것으로 RFID 리더가 모바일 기기 안에 내장된 것으로 모바일 기기를 가진 사람이라면 누구든지 손쉽게 태그가 내장된 상품의 정보를 읽을 수 있다. 이러한 모바일 RFID 리더의 특성으로 인해 태그가 내장된 물품을 소유하고 있는 개인의 프라이버시 침해가 발생한다. 본 논문에서는 간단한 연산과 해쉬함수를 사용하여 모바일 RFID 시스템 환경에 적합한 프라이버시 보호 기법을 제안한다.

• Journal of the Korea Institute of Military Science and Technology
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• v.10 no.4
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• pp.105-115
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• 2007

This study identifies technical barriers and trends on Radio Frequency Identification(RFID) applications for military force, and investigates technical requirements for the RFID implementation on military information systems, based on the preliminary research results from the introductory RFID applications on Ammunition Information System(AIS). We first obtain technical requirements using the Quality Function Deployment(QFD) methods, and identify the areas for research and developments. Furthermore, based on the survey results from military experts and users, we provide the potential application areas for military RFID implementation. Conversely, a technology and research roadmap for RFID in the military system is developed.

• Journal of the Korean Society for Railway
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• v.4 no.4
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• pp.155-161
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• 2001

In this paper, the method is suggested to prevent data collision or damage on RFID(Radio Frequency Identification) system, in case a reader reading multi-tag simultaneously, using binary-search algorithm and Time-domain anti-collision procedure at reader and tag, respectively. The RFID system is designed that Reader enable to communicate with Tag on 13.56MHz bandwidth which is ISM(Industrial Science Medical) bandwidth, antennas of Tag part are designed using MCRF335 Chip. When RF communication is achieved between reader and tag, in case that data is transmitted to reader pass through multiple tags simultaneously, a study on the anti-collision method for the situation that the data collision occurs is performed.

• Journal of the Korea Society for Simulation
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• v.14 no.4
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• pp.43-53
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• 2005

유비쿼터스 컴퓨팅은 무수히 많은 센서들이 관련 데이터 처리 시스템들과 또는 센서들 간의 정보 공유를 통해 서비스를 제공하면서 특정한 장치나 위치에 구애받지 않고 사용자들이 서비스를 이용할 수 있도록 해 준다. 이 논문에서는 유비쿼터스 환경하에서 현재 가장 활발하게 활용되고 있는 RFID(Radio Frequency IDentification) 시스템이 지니는 문제점을 정의하고 이를 극복할 수 있는 새로운 RFID 시스템 구조를 제안한다. 현재의 RFID 시스템은 특정 분야에만 한정하여 단순히 미리 주어진 태그의 식별자를 통해 대상을 식별하는 응용만으로 그 활용성이 제한되어 있다. 이 논문에서는 이러한 제한된 현재의 RFID 시스템의 문제점을 해결하고 유비쿼터스 환경에 적합한 활용성을 극대화할 수 있는 MDR(Metadata registry) 기반의 RFID 시스템 구조를 제안한다. 제안된 시스템은 특정 응용 분야에 종속되지 않고 다양한 분야와의 원활한 연계성을 제공한다. 또한 새로운 정보의 의미를 동적으로 처리할 수 있기 때문에 보다 넓은 응용 범위를 제공한다.