Abstract
This chapter presents a brief introduction to Radio-Frequency Identification (RFID) technology and outlines a few of the data management challenges. RFID technology enables sensors to efficiently and inexpensively track merchandise and other objects. The vast amount of data resulting from the proliferation of RFID readers and tags poses some interesting challenges for data management. RFID tags may derive the energy to operate either from an on-tag battery or by scavenging power from the electromagnetic radiation emitted by tag readers. Further, the tags may respond to signals from a reader by either passively reflecting or actively transmitting a signal. RFID tags and readers have been categorized into five classes based on their capabilities. Devices in the higher classes are generally larger, more expensive, and more capable than those in lower ones. The simplest RFID tag stores only a 96-bit identifier called the Electronic Product Code (EPC). Such tags typically operate on the UHF band and are popular in retail and distribution environments due to their low cost.
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