What is Passive Tag

Radio frequency identification (RFID) technology uses radio frequency signals to identify tagged objects. RFID is an important technology used by the internet of things (IoT)-based applications. It enables communication between the primary devices used in RFID system, the reader, and the tags. The tags share a common communication channel. Therefore, if more than one tag tries to send information simultaneously, the reader cannot differentiate these signals in the case of radio signal interference. This phenomenon is known as tag collision problem. The problem of tag collision is one of the significant disadvantages of fast tagged-object identification in industrial information systems. This chapter describes four binary search algorithms to avoid tag collision and presents a performance measurement mechanism for RFID application systems. Finally, simulation-based experimental results on the performance of these algorithms are presented.