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http://dx.doi.org/10.9708/jksci.2013.18.1.137

A study on the event processing methods for ubiquitous sensor network  

Cho, Yang-Hyun (Dept. of Computer Science & Engineering, Sahmyook University)
Park, Yong-Min (Dept. of Medical Information System, Sahmyook College)
Kim, Hyeon-Gyu (Dept. of Computer Science & Engineering, Sahmyook University)
Publication Information
Journal of the Korea Society of Computer and Information / v.18, no.1, 2013 , pp. 137-147 More about this Journal
Abstract
The RFID(Radio Frequency Identification) and the WSN(Wireless Sensor Network) have technical similarities and mutual effects, they have been recognized to be studied separately, and sufficient studies have not been conducted on the technical integration of the RFID and the WSN. Therefore, EPC global which realized the issue proposed the EPC(Electronic Produce Code) Sensor Network to efficiently integrate and interoperate the RFID and WSN technologies based on the international standard EPC global network. The proposed EPC Sensor Network technology uses the Complex Event Processing method in the middleware to integrate data occurring through the RFID and the WSN in a single environment and to interoperate the events based on the EPC global network. However, as the EPC Sensor Network technology continuously performs its operation even in the case that the minimum conditions are not to be met to find complex events in the middleware, its operation cost rises. Therefore, to address the problems of the existing system, we defined the minimum conditions of the complex events to detect unnecessary complex events in the middleware, and proposed an algorithm that can extract complex events only when the minimum conditions are to be met. To examine the minimum conditions, a index and a query index are used to extract complex events. To evaluate the performance of the proposed methods, In the case of the method of extracting complex events based on a bitmap index, we used the existing extraction method and NS2 simulation to evaluate its performance and thus to show its good performance in terms of the number of operation and the processing time for the complex events.
Keywords
ubiquitous; USN; RFID; WSN; EPCglobal Network;
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