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In an integration system of RFID and Wireless Sensor Network (WSN), RFID is used to identify objects while WSN can provide context environment information of these objects. Thus, it increases system intelligent in pervasive computing. This paper proposes the EPC Sensor Network (ESN) architecture as an integration system of RFID and WSN. This ESN architecture is based on EPCglobal architecture, the de facto international standard for RFID. The core of ESN is the middleware part which is also implemented in the work. In this paper, Complex Event Processing (CEP) technology is used in the ESN middleware which can handle large volume of events from distributed RFID and sensor readers in real time.
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