Research And Developing On The Integration Technology Of RFID And Wireless Sensor Network

Radio Frequency Identification (RFID) is an automatically untouchable technology. It use radio frequency signal to acquire data by identifying target automatically. Wireless Sensor Network (WSN) is a self-organized network system of many sensor node with wireless communication way. It can realize gathering quantification, handling fusion and transportation of data. RFID and WSN have unlike technical features. WSN can monitor information all around while be lack of identifying object. The strong identifying ability of RFID can just compensate this defect. RFID is bad of anti-jamming, and effective read distance of passive RFID is less than 10 meters usually while WSN has 100 meters. If RFID can take advantage of this character, the application domain of RFID will expand largely. The integration of RFID and WSN will promote their application tremendously.Nowadays the integration researches of RFID and WSN mainly focus on such aspects as RFID tag with integrated sensor, integrated system architecture and integrated application. But the researches on integrated system architecture are only abstract design and the researches on integrated data management are not found yet. This paper mainly does deep researches on integrated system architecture and data management.Firstly facing the integrated application of RFID and WSN, this paper designs an integrated system architecture. This architecture has three layers, including application layer, middleware layer and sensor layer. Especially in the sensor layer, RFID and WSN integrate by fusing RFID readers into the wireless sensor network. Secondly, for the sake of solving the data management issues of RFID and WSN integration, this paper design a rule-based relative data module of integration of RFID data and sensor data. This data module is an extendible ER module of RFID data. By adding new status factors, it can not only express the relation dynamically and statically, but also fuses various sensing information into the data module. By using SQL data flow searching language and designing rules, the data management of RFID and WSN integration can be efficiently supported. Lastly, this paper designs the data management system of objects'trace and monitor facing world EXPO by combining the public RFID information service platform and RFID middleware.