• Proceedings of the Korea Contents Association Conference
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• 2008.05a
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• pp.579-582
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• 2008

Since there are a lot of researches regarding RFID nowadays, the idea of RFID Middleware has great popular appeal to improve the efficiency of most use the data from RFID Readers. Even though, there are many RFID Middleware products and solutions in the developing processing, there are unsatisfied researches to manage RFID equipments effectively. In this paper, highly recommends a solution to support various RFID Readers from ALE-complient RFID Middleware in an efficient path of constructing Middleware Connection Information and data protocol form various RFID Readers as an ontology metadata. Therefore, not only reuses of RFID Reader Ontology, but also, by adding the ontology regarding additional RFID Reader and protocol data as a Middleware in a near future, it is able to extend to be treated easily.

• Journal of the Korea Institute of Information and Communication Engineering
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• v.12 no.1
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• pp.130-136
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• 2008

This paper describes a low-power high-performance analog front-end block for $UHF(860{\sim}960MHz)$ band RFID tag chips. It satisfies ISO/IEC 18000-6 type C(EPCgolbal class1. generation2.) and includes a memory block for test. For reducing power consumption, it operates with a internally generated power supply of 1V. An ASK demodulator using a current-mode schmitt trigger is proposed and designed. The proposed demodulator has an error rate as low as 0.014%. It is designed using a 0.18um CMOS technology. The simulation results show that the designed circuit can operate properly with an input as low as $0.2V_{peak}$ and consumes $2.63{\mu}A$. The chip size is $0.12mm^2$

• Journal of the Korea Institute of Information and Communication Engineering
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• v.12 no.3
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• pp.452-460
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• 2008

ALE-complient RFID middleware system receives EPC code data from reader devices and converts the data into URN format data internally. After filtering and grouping, the system sends the resulting URN code to application and(or) users. Meanwhile, not only the types of EPC code are very diverse, but also another new kinds of EPC code can be emerged in the future. Therefore, a method to process all kinds of EPC code effectively is required by RFID middleware. In this paper, a method to process various kinds of EPC code acquired from RFID reader devices in ALE-complient RFID middleware is proposed. Especially, we propose an approach using ontology technology to process not only existing EPC code but also newly defined code in the future. That is, we build an ontology of conversion rules for each EPC data type to effectively convert EPC data into URL format data. In this case, we can easily extend RFID middleware to process a new EPC code data by adding a conversion rule ontology for the code.