Anti-collision protocol development for passive RFID tags

Authors:
Nowshad Amin;Puah Weng Lin
Affiliations:
Dept. of Electrical, Electronics and System Engineering, Faculty of Engineering, Solar Energy Research Institute, National University of Malaysia, Selangor, Malaysia;Dept. of Electrical, Electronics and System Engineering, Faculty of Engineering, Solar Energy Research Institute, National University of Malaysia, Selangor, Malaysia
Venue:
AIC'07 Proceedings of the 7th Conference on 7th WSEAS International Conference on Applied Informatics and Communications - Volume 7
Year:
2007

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Abstract

Tag identification is an important measure in RFID systems with applications for monitoring and tracking. A RFID reader recognizes tags through communication over a shared wireless channel. When multiple tags transmit their IDs simultaneously, the signals collide and this collision disturbs a reader's identification process. Collision problem can be divided into reader collision and tag collision. Tag collision is taken into account in this study since most of the applications involve tag collision problem. Therefore, an anti-collision protocol is developed to solve this issue. This study focuses on the most widely used passive tag, as it is simple and cheaper. Here, a circuit has been proposed that can implement the anti-collision protocol for passive tags, and its functionality has also been investigated. Among several anti-collision protocols, the Binary Tree Protocol is chosen and a circuit based on Binary Tree Protocol has been constructed using SIMUAID simulator. In Binary Tree Protocol, the tag ID with lowest bit has the priority to be identified first. The circuit is able to successfully solve the anti-collision problem in RFID system to recognize the tag's ID.