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Radio frequency identification (RFID) is an automatic identification technology which identifies physical objects individually according to their unique identifiers (ID) recorded in each RFID tag. Many business processes require the integrity verification of a group of objects in addition to individual object identification. This paper proposes(More)
Incorporation of heterogeneous wireless sensor and actuator networks (WS&AN) is an essential challenge of web based Internet of Things (IoT) architectures. We propose to use UPnP and end-to-end HTTP communication using CoAP to bridge WS&AN and IoT system. UPnP enables automatic discovery of sensor devices which directly connect to a WS&AN via a gateway.(More)
When a multitude of RFID tags are in the interrogating field, an anti-collision technology must be used. In literatures, the reading performance was mainly investigated on the error-free communication links between reader and tags. In the practical situations, particularly where a number of readers and other wireless devices share the same frequency band,(More)
Readability of passive RFID fundamentally depends on the tag empowering. The minimum required power, usually referred to as sensitivity, depends on the chip and antenna manufacturing. The sensitivity affects the readability but it is not the sole determinant of readability. The readability of RFID comprises a number of factors, particularly in the UHF band.(More)
The Internet of Things is a concept of connecting small real space physical objects to the Internet using sensor network, RFID, and other forms of wireless network technologies. In this paper, we present an EPC (Electronic Product Code) based Internet of Things (IoT) architecture. The key concept of the architecture is EPC network over heterogeneous access(More)
This paper proposes an Electronic Product Code (EPC) based supply chain visibility system framework which interworks with Electronic Data Interchange (EDI) system which manages its orders and inventory with non-EPC stock keeping units (SKU) and their quantity. The feature of the framework is the cascadable packing/shipping management, which enables regional(More)
This paper proposes a device and capability discovery protocol with integrated Universal Plug and Play (UPnP) and Object Naming Service (ONS). The protocol automatically establishes a list of available devices - sensors, actuators and electronic apparatus - in our home. Since each device is identified with a globally unique Electronic Product Code (EPC) in(More)
Consider a situation where one desires to retrieve sensor data from an arbitrary environment via a moving interrogator. Maintenance of street lights and electric apparatus in conduits for example. The fundamental problems with this system have been 1)the trade-off relation between power consumption by sensor and the data retrieval rate for the interrogator,(More)
Wireless and battery-less health monitoring of machinery and structures have been a dream in mechanical engineering. Particularly, simultaneous data collection from multiple sensors is required to detect failure or malfunction before it becomes fatal problem. In this paper, a concept of simultaneous data collection from multiple sensor RF tags with multiple(More)