Collision-tolerable Tag Identification for Passive RFID
Date Issued
2008
Date
2008
Author(s)
Hsu, Hsiung-Hsuan
Abstract
Development of Radio Frequency Identification (RFID) is changing our life style. Better efficiency and less time can be achieved due to the fast reading speed and convenience of RFID. Recently, barcode is substituted by RFID in the applications of the management of large amount of products and people. Therefore, the identification technique of multiple tags becomes more significant.n order to enhance the identification speed of multiple tags, there are many problems to be solved. In this thesis, the solution of collision, which impacts identification speed most, is proposed. Instead of avoiding collisions which most researches focus on, the identification of collision signals is another feasible method. The samples of collision signals are used to compare with later collision signals for identification. Hence, the probabilities of one-tag and two-tag successful identification are 60% and 35% respectively in case of two tags collision.esides, improved anti-collision algorithms are presented. Up to 50% time reduction of multiple tags identification can be achieved among these methods. In Framed Slotted ALOHA system, better tag estimation methods are proposed. Most suitable frame size can be acquired by acute tag estimation and further increases system efficiency by 20%.
Subjects
RFID
packet correct rate（PCR）
anti-collision
binary tree algorithm
binary search algorithm
framed slotted ALOHA
tag estimation
Kalman filter
Type
thesis
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