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Research and Implementation of UHF RFID reader anti-collision algorithm

Author: YangKun
Tutor: LengPeng
School: University of Electronic Science and Technology
Course: Communication and Information System
Keywords: Time slot Aloha Binary tree search RFID Imperfect competition
CLC: TP391.44
Type: Master's thesis
Year: 2010
Downloads: 287
Quote: 1
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Abstract


Radio Frequency Identification (RFID) is a non-contact automatic identification technology , has the recognition distance , penetration ability , multi- object recognition , etc. , and is now widely used in automation, transportation , control, management , products, services and certificates security and other fields , has become one of the hot technologies of the Internet of Things . The range of memory when the role of the reader in the multiple tags at the same time two or more tags to return information to the reader , conflict , and the results will lead to transmission failure . Therefore the need for anti-collision algorithm , to avoid or reduce the collision , and to improve the efficiency of the RFID tag read . RFID anti-collision algorithm is mainly concentrated in the Aloha slot anti-collision algorithm and binary tree search anti-collision algorithm . Aloha timeslot anti-collision algorithm is a label can not always be identified phenomenon ; binary tree search algorithm for this problem can be avoided , but when large number of tags to identify long cycle , affect the efficiency of the RFID reader . This paper is divided into two parts , the first part of the main networking test widely used Intel R1000 UHF reader , the reader inherent algorithm based on ISO / IEC 18000-6C standard algorithm , but did not fully implement this standard. The paper analyzed the inherent defects of the algorithm and simulation NS2 standard algorithm , the inherent algorithm improved method . The second part is based on the ISO / IEC 18000-6C UHF RFID standards , imperfect competition, anti-collision algorithm ( SPC: Slot -based Partial Competitive Anti - collision Algorithm ) proposed a new time slot , the algorithm first dynamic binary tree search technology to introduce the competitive collision avoidance mechanism , and adding special treatment strategy of idle slots and collision slots . The article also establish multiple tag reads simulation models , analysis and comparison of a the Dynamic binary tree search algorithm , multi-tag read performance of the ISO / IEC 18000 - 6C standard algorithms and SPC algorithm three algorithms , simulation results show that the SPC algorithm based on the ns-2 platform recognition time approximately 30% and 20 % shorter than the the dynamic binary tree search algorithm , and 18000-6C standard algorithm , the recognition rate increased by approximately 35% than the 18000-6C algorithm has a good value .

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CLC: > Industrial Technology > Automation technology,computer technology > Computing technology,computer technology > Computer applications > Information processing (information processing) > Pattern Recognition and devices > Optical pattern recognition devices
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