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Implementation of an Efficient Slotted CSMA/CA Anti-collision Protocol for Active RFID System
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 Title & Authors
Implementation of an Efficient Slotted CSMA/CA Anti-collision Protocol for Active RFID System
Joo, Jin-Hoon; Chung, Sang-Hwa;
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Tag collection is one of the major concerns in radio frequency identification(RFID) system. All tags in RFID reader's transmission range send response message back to the reader in response to collection request message on the given rf channel. When multiple tags respond simultaneously, tag-collision may occur. Tag-collision problem is one of the most important issues in active RFID performance. To mitigate this problem, frame slotted ALOHA(FSA) anti-collision protocol is widely used in active RFID system. Several studies show that the maximum system efficiency of FSA anti-collision protocol is 36.8%. In this paper, we propose an efficient slotted CSMA/CA protocol to improve tag collection performance. We compare our protocol to the FSA anti-collision protocol. For the experiment, an 433MHz active RFID system is implemented, which is composed of an RFID reader and multiple tags. We evaluated the tag collection performance using one RFID reader and 40 tags in the real test bed. The experimental result shows that proposed protocol improves the tag collection time, round and collision probability by 18%, 37.4% and 77.8%, respectively.
Active RFID;Slotted CSMA/CA;ISO/IEC 18000-7 Mode2;Tag collection;
 Cited by
고속 태그 수집을 위한 개선된 능동형 RFID 시스템용 프레임 Slotted ALOHA 알고리즘 구현,김지태;강병권;이강원;

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