• Journal of the Korea Academia-Industrial cooperation Society
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• v.11 no.10
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• pp.3859-3865
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• 2010

Modeling a virtual reader and tags, the emulator system is realized by using a commercial signal generation device to make signal, a data collection equipment, and DSP board. By using a Virtual UHF RFID (860 ~ 960 [MHz]) reader/tags module, a developed RFID reader, protocol of tag, and properties of RF support to provide the way how to verify the suitability to international standards (ISO 18000-6 Type C, EPCglobal C1G2). In this paper, to implement a proposed model reader and tag model, Visual DSP is applied by using DSP board, composing the system's signal generators, signal analyzers and performance verification, the target readers or tags, RFID emulator control computesr and control programs.

• Journal of the Institute of Electronics Engineers of Korea TC
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• v.46 no.11
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• pp.12-17
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• 2009

This paper presents a tag emulator for a UHF band RFID system. The tag emulator supports the 1800-6C and EPC global class 1 generation 2 standards. The transmitted signal from a reader is generated using the PIE coding and ASK modulation methods. Signals of a tag are from the FM0 coding and ASK modulation methods. The ARM7 processor carries out the overall control of the system and signal analysis of incoming data. The verification of the tag emulator employs the application platform implemented in C++. Users can define parameter values for protocol during the application run. The tag emulator presented in this paper allows evaluating various design alternatives of the target RFID system in real applications.

• Proceedings of the KIEE Conference
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• 2008.04a
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• pp.41-42
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• 2008

무선방식으로 원격에서의 인식으로 정보교환을 가능하게 하는 RFID(Radio Frequency IDentification) 시스템은 태그 내의 배터리 유무에 따라 수동형과 능동형으로 구분된다. 수동형 태그는 판독기로부터 받은 RF 신호를 에너지로 이용하기 때문에 인식거리가 짧으며, 가격이 싸고 반영구적으로 사용할 수 있는 장점이 있다. 반면에, 능동형 태그는 금속재질에 취약한 수동형의 단점을 극복하는 동시에 인식거리가 길고, 인식률이 좋은 장점이 있다. 따라서 항만물류나 국방 분야에서 능동형 RFID 시스템에 대한 개발이 점차 확대되고 있다. 하지만 동일한 표준으로 개발된 제품의 서로 간에 인식이 불가능한 사례가 보고되고 있으며, 국제적으로 정확한 평가방법 및 장치가 정립되지 않아 개발된 제품들 간의 상호 운용성 및 표준 적합성 평가에 대한 어려움이 존재한다. 본 논문에서는 능동형 RFID 시스템의 적합성 평가를 위한 에뮬레이터의 하드웨어 및 소프트웨어를 설계하고 제작하였다. 설계된 장치는 Matlab의 Simulink를 통한 시뮬레이션으로 성능을 분석하였고, 실제 능동형 RFID 태그의 표준적합성 평가를 통해 에뮬레이터의 적용 가능성을 검증하였다.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.19 no.5
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• pp.1235-1242
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• 2015

In global shipping logistics, it is important for users to keep track of the location of their continuously moving cargos. Analyzing the GPS data stream coming from the tag which is attached to the cargo, we are able to keep track of the cargo location in terms of going into or out of a certain logistics area using the information of the spatial relationship change between the tag and the logistics area. In this paper, we propose a simulation system for measuring the precision and false alarm rate of the cargo location tracking algorithm which generates spatial events over the global logistics areas. Due to the difficulty of experiment with a real tag, we developed a tag emulator to create a virtual tag which operates exactly like a real tag. We show the cargo location tracking system works correctly with the tag emulator which communicates with it using the same protocol as the real tag.

• Journal of KIISE:Computing Practices and Letters
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• v.16 no.8
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• pp.842-852
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• 2010

RFID applications use tags to identify objects, but recent applications tend to include diverse sensor devices such as light, temperature, and humidity sensors as well. RFID tag information is usually processed via the event driven model. However sensor devices are usually accessed via the functional call model. Therefore application developers have to deal with mixed data access models and device dependent interface functions. In this paper, we propose a sensor reader emulator that provides a consistent access interface to sensor devices regardless of the types of devices. SRE provides a more efficient way of developing RFID applications by providing a single application programmer's view to RFID tags and sensor devices. In applications where tags are fixed to a place, SRE can replace expensive sensor tags and sensor readers with inexpensive sensor devices reducing the total cost while providing the same functionality.

• Journal of the Institute of Electronics Engineers of Korea CI
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• v.45 no.5
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• pp.201-208
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• 2008

An active RFID system has the advantages of a long identification distance and a good identification rate as well as overcoming the passive RFID's drawback such as the lowering of identification rate on metal materials. So, the development of an active RFID system has been gradually increasing in harbor logistics and the national defense area. On the other hand, some identification failures between products developed under the same standards have been reported, and there are difficulties in evaluating the interoperability between developed Products and standard conformance test because an accurate evaluation method and equipment has not been established at the international level. Motivated by these, this study presents a realization of the hardware and software of emulator to evaluate the standard conformance of an active RFID system, Performance of the designed system are then analyzed by means of simulations of Matlab/Simulink, and the applicability of the emulator is verified by evaluating the standard conformance of a real active RFID tag.