• Proceedings of the KAIS Fall Conference
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• 2006.05a
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• pp.437-441
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• 2006

본 논문에서는 RFID 위치추적엔진과 지능형 에이전트를 이용한 선호상품 추천 기법을 이용하여 RFID기반 위치추적을 이용한 실시간 선호 상품 추천 시스템을 제안한다. 매장안에서 RFID 태그가 부착된 스마트 카트를 이용하여 고객의 위치를 실시간으로 파악하여 각 구역별 쇼핑시간과 개별 고객의 구매 히스토리 분석 및 이동 구역 예측을 통해 실시간으로 쇼핑 매장에서 각 고객의 선호상품을 추천한다.

• Information and Communications Magazine
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• v.24 no.8
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• pp.7-13
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• 2007

유비쿼터스 사회 실현의 핵심 기술인 RFID/USN 기술은 우리 정부의 USN구축 기본계획과u-IT839기술개발 정책에 따라 국산화, 기술 고도화 및 핵심 원천기술 개발을 전략적으로 추진하여 그 성과가 나타나고 있다. RFID/USN 기술은 가장 기본적인 사물의 식별 단계로부터, 이력 추적, 상태정보의 모니터링, 실시간 감시 및 제어, 자율형 서비스로 진화함에 따라 전통적인 RFID 및 무선센서네트워크에서 출발하여 궁극적으로 다양한 응용서비스를 지원하는 USN기술로 발전될 것이다. 향후 RFID 기술 분야는 상태정보처리 및 위치 추적 등 복합 기능과 성능 고도화로 발전되고 Item단위까지 적용하기 위한 새로운 리더, 초저가의 Printed 태그 및 불법 복제 방지 등의 새로운 기술이 개발될 전망이다. 센서네트워크 분야에서는 기존의 IEEE802.15.4와 ZigBee를 뛰어넘어 저전력, 고신뢰성, 확장성, 이동성 등을 지원하기 위해 효율적인 무선전송, 초경량의 노드, 네트워킹, Cross-layer최적화, 데이터 융합 등의 핵심기술 이 요구되고 USN 미들웨어 기술은 다양한 USN응용 서비스를 위해 공통 S/W 플랫폼을 제공하고 다양한 센서네트워크로부터 수집한 정보를 가공하여 서비스간 연계 통합하는 플랫폼으로 발전될 전망이다.

• Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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• 2015.10a
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• pp.648-650
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• 2015

In this research, we investigate an influence of a reader antenna location in Passive UHF RFID system based Object localization. When the localization system uses stationary RFID reader system, the performances of the system are significantly varied depending on the deployed antenna conditions due to its external environment such as reflection by the ground and obstacles. In this research we deeply study the RF conditions and differentiation with various antenna location. According to the empirical results, the localization system shows the best performance, where the reader antenna locates 1.5m from the target area of interest.

• KIPS Transactions on Computer and Communication Systems
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• v.3 no.10
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• pp.329-336
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• 2014

Pipe spool is the most important element of plant equipment in plant construction site. Currently, the plant construction site manage the pipe spool location and usage history by handwriting. Frequently, the pipe spool is moved to unpredictable places by field workers in many construction sites and in cases like this, the pipe stool is replaced with another similar pipe spool. Since it's hard to determine the exact location of some of the pipe spools, it takes unnecessary time and labour to find the missing pipe spools, which proves that stock management is not under control. The purpose of our system is to make the identification of real-time location of the field pipes possible by attaching UHF RFID tags to the pipe spool, which will be used to connect with UHF RFID reader and antenna on vehicles. A field test conducted by the proposed system resulted in the success rate of 98% and the missing 2% was recuperated by hands-on correction, which proved that stock management through the proposed method can be 100% effective. The proposed system is expected to reduce labour costs and make stock control of assets possible, as well as applicable to similar stock management environments.

• Annual Conference of KIPS
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• 2005.11a
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• pp.549-552
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• 2005

RFID/ USN은 IPv6 및 BcN과 더불어 미래 유비쿼터스 사회의 기반 인프라로서 고려되고 있으며, 이를 적용하기 위한 다양한 연구가 진행되고 있다. 특히 물류시스템에서 물류의 생산, 이동, 상태 관리 등에 사용되고 있다. 본 논문에서는 물류 보관 창고를 중심으로 입고된 제품의 최적 상태를 유지하고 이를 제어할 수 있는 능동형 창고 상태 관리 시스템을 설계하고자 한다.

• Proceedings of the Korea Society for Industrial Systems Conference
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• 2006.05a
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• pp.407-410
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• 2006

최근 들어 반도체의 기술적인 성장과 네트워크의 발전으로 유비쿼터스 컴퓨팅 환경이 대두되고 있으며 이에 따라 RFID라는 신기술이 등장과 응용에 관한 연구가 활발히 진행되고 있다. 이에 본 논문에서는 기존 RFID 시스템에서 유선망을 사용한 데이터 전송으로 인하여 발생될 수 있는 공간 및 이동성의 제약을 극복하기위하여 저가의 무선전송모듈을 적용하여 휴대형 상품정보제공 시스템을 개발하였다. 무선전송 모듈은 900MHz 대역의 Texas Instruments 사의 TRF6901 chipset을 이용하였고, 이를 제어하는 MPU는 TI사의 MSP430F149로 설계하였다. 본 논문에서 개발한 시스템은 도서관리, 출입통제 시스템등에 범용적으로 적용될 수 있을 뿐 아니라 핸드 헬드형 RFID 시스템에 혁신적인 기대 효과를 예상할 수 있다.

• KIPS Transactions on Software and Data Engineering
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• v.2 no.5
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• pp.311-318
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• 2013

Recently, there have been many studies on RFID-based SCM. Yet, studies of synchronizing errors caused by tracking logistics information in supply chain, and activating & monitoring RFID infra is still insufficient. Also, there is no case of developing the intelligent SCM system enabling total monitoring and controlling RFID Infra by applying these technologies. Logistics information synchronization based Smart SCM model is intelligent supply chain service model to monitor the status of the RFID equipments in supply chain and the synchronization of the logistics process in each logistics point through one integrated view, as well as to react instantly by providing the information to help the various decision makings, when the emergency occurs. By adopting global logistics standard, RFID related standard specification, EPCIS standard, and SSI middleware platform, this model provides the domestic standard specification.

• Journal of the Korea Institute of Information Security & Cryptology
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• v.16 no.4
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• pp.3-12
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• 2006

RFID (Radio Frequency Identification) system is expected to play a critical role providing widespread services in the ubiquitous period. However, widespread use of RFID tags may create new threats to the privacy of individuals such as information leakage and traceability. It is difficult to solve the privacy problems because a tag has the limited computing power that is not the adequate resource to support the general encryption. Although the scheme of [2] protects the consumer privacy using an external agent, a tag should compute exponential operation needed high cost. We propose Self Re-Encryption Protocol (SREP) which provides song privacy without assisting of any external agent. Our SREP is well suitable to low-cost RFID system since it only needs multiplication and exclusive-or operation.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.12 no.3
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• pp.461-468
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• 2008

RFID technology is one of the core technologies for ubiquitous computing, and many research activities have been going on in this research area currently. Related with these researches, mobile RFID network services using mobile devices having a built-in RFID reader and mobile networks have been launched in Korea, for the first time in the world. In this paper, we propose a method to coulect ALE middleware suggested by EPCglobal and existing mobile RFID network services. Especially, a RFID code conversion method is proposed to process mobile RFID code systems within ALE middleware systems. Using the proposed method, application developers and(or) content business industries can acquire the information they want, which is filtered and refined in real-time or periodically, from mobile RFID users. So, they can Provide customized services to users by using the user preference information. In this war, the ALE middleware system can be easily extended to process mobile RFID code effectively.

• Journal of the Korea Society of Computer and Information
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• v.12 no.6
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• pp.297-306
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• 2007

Bar-code based airway logistics systems have many problems like freight loss and data management error due to semiskilled air-cargo process and individual information system. To solve these problems, this paper analyzed how to process an air-cargo practically and designed and implemented the RFID-based airway logistics system. This system has an information service system which manages data from RFID systems in realtime and provides a communication interface for data sharing. And, this system precesses data queries from capture applications and access applications to provide various services to users such as the freight track and trace service. Also, this system includes a H/H reader agent to integrate existing bar-cord systems. It allows us to realize automation and information-oriented air-cargo process and achieve improvement of air-cargo services with reduction of freight loss and management error.