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A Reprocessing Model for Complete Execution of RFID Access Operations on Tag Memory

Journal of Computer Science & Technology 2012年第1期27卷 213-224页

作者： wooseok ryu Bonghee Hong Joonho Kwon Ge Yu Department of Computer Engineering Pusan National UniversityBusan 609-735Korea Institute of Logistics Information Technology Pusan National UniversityBusan 609-735Korea School of Information Science and Engineering Northeastern UniversityShenyang 110004China

This paper investigates the problem of inconsistent states of radio frequency identification （RFID） tag data caused by incomplete execution of read/write operations during access to RFID tag memory. Passive RFID tags require RF communication to access memory data. This study is motivated by the volatility of RF communication, where instability is caused by intermittent connections and uncertain communication. If a given tag disappears from the communication area of the reader during the reading or writing of tag data, the operation is incomplete, resulting in an inconsistent state of tag data. To avoid this inconsistency, it is necessary to ensure that any operations on tag memory are completed. In this paper, we propose an asynchronous reprocessing model for finalizing any incomplete execution of read/write operations to remove inconsistent states. The basic idea is to resume incomplete operations autonomously by detecting a tag＇s re-observation from any reader. To achieve this, we present a concurrency control mechanism based on continuous query processing that enables the suspended tag operations to be re-executed. The performance study shows that our model improves the number of successful operations considerably in addition to suppressing inconsistent data access completely.

关键词： asynchronous reprocessing concurrency control continuous query RFID tag access operation

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