Read bulk data from computational RFIDs

Without the need of local energy supply, computational RFID (CRFID) sensors are emerging as important platforms enabling a variety of sensing and computing applications. Nevertheless, the data throughput of CRFIDs is very low. This paper aims at efficiently transferring bulk data from CRFIDs to commodity RFID readers. We first investigate the problem of low data throughput of CRFIDs. We then propose several simple yet effective techniques to allow CRFIDs to meet stringent timing requirement of commodity RFID readers and achieve efficient data transfer. We implement a prototype system based on the WISP CRFIDs and commercial off-the-self RFID reader. The experiment results show that our approach provides better compatibility with EPCglobal C1G2 compliant RFID devices and works perfectly with the commodity RFID readers.