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RFID data cleaning treatment strategies and algorithms

Author: Xiong
Tutor: XuGuiPing
School: Huazhong University of Science and Technology
Course: Computer technology
Keywords: Radio frequency identification technology Atomic events Raw data cleaning RF technology security Load Balancing
CLC: TP391.44
Type: Master's thesis
Year: 2011
Downloads: 245
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Abstract


In recent years, the concept of things as well as RFID radio frequency identification technology proposed Wal-Mart supply chain management in the successful use of such previously used only for military field RFID technology , by virtue of its low cost , small size and other characteristics more and more without touching use in the production automation , access control, road toll , cargo tracking and other civilian areas . However, due to various environmental and RF technology itself some of the features , RFID identification tag reader Various errors occur when identification phenomenon: a positive reading, a negative reading, label redundancy, redundant reader , here are some factors that will constrain further development of RFID technology . Several of these dirty data , respectively corresponding algorithm to be cleaned. Because RFID has unlimited original data stream , and therefore the algorithm used in the cleaning of sliding window . Wherein the removal of substantially eliminating active read noise in the original data stream , the algorithm of the statistical number of tags in the sliding window to determine whether the label is noise ; remove negative reading is achieved by the time smoothing purpose, time smoothing operation means time dimension less leakage reading the label ; removing redundant label is the label tag data stream adjacent interval is greater than a certain threshold ; go reader redundancy is spatially smoothed data on the label , that combine multiple reader label tag output stream and time scale while maintaining orderly . Smoothing algorithm for sliding time window setting difficult problem , we propose a browser-based deployment structure set window size , the method has the advantage of having frequent changes affecting the size of the sliding window system performance . In the RFID system security protection, the system uses a security level based access control policies . For cleaning system performance by dynamically adjusting a cleaning task cleaning service node to reduce the load on a single server node cleaning pressure , to achieve a better stability of the system and efficiency requirements. System through simulation experiments show that dynamic load balancing strategy using cleaning effectively improve the operating efficiency of the cleaning process .

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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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