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RFID complex event processing and real-time query optimization strategy

Author: WangZhongQiang
Tutor: XuGuiPing
School: Huazhong University of Science and Technology
Course: Computer Software and Theory
Keywords: Radio frequency identification technology Complex Event Query Optimization Event Monitoring
CLC: TP391.44
Type: Master's thesis
Year: 2011
Downloads: 40
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Abstract


As one of the key technologies of the system of things , RFID ( radio frequency identification technology ) has been widely used in various fields. However, due to having massive RFID data , timeliness , and data semantics implied inaccuracies and other characteristics, the direct use of existing traditional database technology and data stream processing technology has been difficult to meet the upper application for efficient real-time RFID data processing requirements, specifically for the characteristics of RFID data using event processing technology has been increasingly recognized by the industry . For the characteristics of RFID data , combined with the existing RFID event processing technology, introduce self-developed real-time event processing system RTx-RFID. RTx-RFID system uses an event -centric data processing technology, according to the function of the system is divided into three levels: complex event processing layer, the basic event processing layer , the raw data cleaning layer . Among them, the complex event processing layer using SQL-like query language to provide users with the event expressed complete semantic query interface . System provides six kinds of event operations and the use of a query tree intermediate representation to achieve the event query requests into Petri nets event monitoring model, system monitoring model based on Petri nets for RFID event monitoring. In the complex event processing layer on the static and dynamic event query optimization , through the adjustment of the query tree complete rewrite of the event algebraic expressions and queries in the existing share point model library Find subquery sharing. On the other hand , the system through the establishment of query cost model for each event operations assessment to determine the optimum operation of the implementation plan. Existing complex event processing tend to focus on physical optimization query processing , and did not discuss the logical structure of the query , the system logically designed several strategies to optimize the query .

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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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