Recently there are getting more and more systems and applications using RFID. There is a necessity of a framework for them. This paper presents a Java-based framework that offers a set of general services to support various RFID systems for different purposes and application scenarios. The framework emphasizes on the semantic data binding for contextual information mapping between real and cyber spaces. The Java interface classes are provided to support general communications among a RFID, a reader and an application. Real and cyber spaces are synchronized via dynamic and real-time mapping from symbolic strings or IDs to the semantic XML data representations that are more effectively and efficiently useable by RFID applications. In this paper, the architecture and functional modules of the Java-based RFID service framework are explained in detail.
One of the substantial issues in ubiquitous computing is the automatic processing of information from real world objects and enabling their interactions in the background. This scenario requires a framework on which such information processing and object interaction can be supported. This article presents our research progress in developing a framework based on the object-oriented design approach and the use of a push web server. With the concept of object abstraction, an object can hide its internal structure from the outside world, which can make the object secure. Moreover, object interaction can be conducted via message exchanges, which makes the interface simple and standardized and the heterogeneous objects can be easily handled as well. Instead of using the traditional pull web server, a push web server, i.e., Comet, which runs on top of HTTP protocol is used to exchange messages. To this, object interactions can be operated smoothly and seamlessly in real time with shorter delay.
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