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Studies on Anti-collision Algorithms Used in UHF RFID

Author: LuoChunQing
Tutor: LiBaoShan
School: Inner Mongolia University of Science and Technology
Course: Applied Computer Technology
Keywords: Reader Label Aloha Random number Throughput
CLC: TP391.44
Type: Master's thesis
Year: 2010
Downloads: 151
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Abstract


RFID technology (Radio Frequency Identification, RFID) is a technology, the rise in the eighties is by way of the radio to identify the target with no contact , strong anti-jamming capability , can simultaneously identify multiple targets and rewrite data etc., are now widely used in various industries . This paper introduces a knowledge of the characteristics , research direction , principles of physics , communications technology and related standards for radio frequency identification , and highlights a key technology of radio frequency identification application : anti-collision algorithm and on the frame gap Aloha algorithm , dynamic frame slotted Aloha algorithm , algorithm simulation analysis based on the grouping dynamic frame slotted Aloha algorithm and binary tree search algorithm . Papers from the dynamic frame slot algorithm is proposed based on random numbers to send dynamic frame slotted Aloha algorithm, the algorithm requires the label increase in the original structure on the basis of a random number , it is common to generate a random number of time slots random number generator generates one such random number is then sent to the reader, this specific number of bits after the algorithm generates eight - bit binary number to obtain a specific format , and its logic operation , the label in the received request to the random number to the reader command Tags to select the same time slot and the random number format separated jointly with the original time slot random number for locating tags , reduced from the angle of the probability of the collision of the label , thereby enhancing the recognition efficiency . Thesis, Visual C 6.0 for dynamic frame slotted Aloha algorithm , program simulation based on dynamic packet frame slots the Aloha algorithm as well as based on a random number sent dynamic frame slotted Aloha algorithm , and a comparative analysis , the results showed that based on random the number of transmission dynamic frame slotted Aloha algorithm performance is better than the previous two algorithms . Finally, the chapter also describes label UHF RFID system performance estimation algorithms, random number generation algorithm and interference , and the UHF RFID systems should pay attention to several matters : prior to installation or use of the UHF RFID system application environment ; choose the right anti - collision algorithm ; should avoid human interference ; reasonable to adjust the number of overlapping labels and label receiving surface angle .

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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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