Proceedings of the 2 nd International Conference on Emerging Databases (EDB2010) A Dual Data Processing System Using Sensor Integrated RFID Middleware Md. Kafil Uddin College of Computer Sci. & Information Systems Najran University,Najran-1988 Kingdom of Saudi Arabia (KSA) mdkafil@gmail.com Mahbubur Rahman Dept. of Logistics Information Techonology Pusan National University Busan 609-735, Republic of Korea mahbubcsedu@pusan.ac.kr Goo Kim Department of Computer Engineering Pusan National University Busan 609-735, Republic of Korea daekeun7@pusan.ac.kr BongHee Hong Department of Computer Engineering Pusan National University Busan 609-735, Republic of Korea bhhong@pusan.ac.kr Abstract— Recently sensor technology has drawn greater attention in ubiquitous computing by deploying huge amount of sensor tags in supply chain, harbor logistics, healthcare management etc. Sensor tags are capable to provide the sensing information of the product and item with its identification at the same time. The dual data generated from a sensor tag is RFID data and Sensing data. RFID Readers are used to read RFID- Sensing (RFID and Sensing) information from the sensor tag. Therefore, a dual data processing system is required to manipulate and process all the tag data from the sensor tag. In this paper, we introduce a sensor integrated RFID middleware system for ubiquitous computing. It is an efficient system capable to process dual data (Sensor data and RFID data) stored in the tag memory. Keywords- RFID;Dual data; Sensor tag; Middleware I. INTRODUCTION The evolution of sensor technology and Radio Frequency Identification (RFID) research makes possible integration [1,2] of RFID data and Sensing data using same RF tag, called Sensor Tag [3,4]. Sensor tags are, in general, characterized by RF identification, user memory and sensing information. RF capable sensor tags having user memory store sensing data to its memory and transfer that data to the reader when it is in reader interrogation area. While comparing EPCglobal [5] tag class structures [6], active tags enable a greater communication range, can be applied to metal objects, and allow easy addition of sensing modules [7, 8]. Therefore, active RFID tag can be used as senor tag [9], enabling simultaneous id and sensing data transmission using same RF infrastructure. A large number of such tags can be deployed in cold chain management [10,11], supply chain management systems and harbor logistics systems where huge amount of sensing data is generated. Consequently, sensor tag is suitable for continuously monitoring temperature-sensitive perishables, controlling product temperature and humidity, elimination of container damage due to huge inside pressure, and automatic tracking of product location. Thus, it is possible to create a physically linked world in which every item is numbered, identified, cataloged and tracked with various sensing information. However, to provide proper system services using sensor tags, it is necessary to control and efficiently manage tags carrying id and sensing information. Although Sensor Tag is used to acquire integrated RFID- Sensing information, the technology used in its management and control is still in its infancy. Still there is no global standard provided for RFID-Sensing data collections. In most RFID applications, heterogeneous tags such as RFID tag (only id data) and active sensor tag (RFID-sensing data) from various vendors are used and RFID reader must be able to retrieve data from these heterogeneous tags. Therefore, compatibility and interoperability become a major system concern in using Sensor Tag. Also, sensor tag must continuously store sensing information in its tag memory. But limited memory and battery power is big a challenge in system deployment. Moreover, system suffers from bulk air load while transmission of sensing data in tag memory takes place. However, faster tag collection is possible using active RFID System [12], still controlling sensor tag modes and states is important for saving tag battery power and sensing values in tag memory. We develop an efficient Sensor integrated RFID Middleware based on EPCglobal Architecture Framework [13]. Our state-of-the-art system architecture follows standard active air interface ISO/IEC 18000-7 [14] to manage and control sensor tag, tag modes and states to store battery power with sensing information. It provides several APIs for receiving sensing queries, managing tags and readers, monitoring sensing values, reporting alarms and notifications to the users. It also provides four service types that together form core service module for an efficient dual data processing system. In this paper, we focus on the development of efficient Sensor integrated RFID Middleware using existing standards. We analyze all the necessary standards and background technologies involved with active RFID systems, existing management architectures and related application scenarios to extract all the system requirements. The main contribution of this paper is to design efficient system architecture for sensor tag that incorporates all the management requirements to process dual data (RFID data and Sensor data) with compatibility and global interoperability of the system. The structure of this paper is as follows. Section 2 describes lists of related works. Section 3 analyzes sensor tag application scenarios and active air interface standards to extract system requirements with some unique services. In section 4,