-Security of data is a major issue in RFID environment as RFID is a wireless Radio frequency devices used in the wireless network. The data reads by the tag is send to reader which is then stored at the server, but security is an important concern during the transmission of data from tag to reader. Although there are various security and authentication techniques implemented for the security of...

Ultra-wideband (UWB) technology is foreseen as a promising solution to overcome the limits of ultra-high frequency (UHF) techniques toward the development of green radio frequency identification (RFID) systems with low energy consumption and localization capabilities. While UWB techniques have been already employed for active tags, passive tags solutions are more appealing also due to their low...

Radio Frequency Identification (RFID) has become widespread thanks to its important advantages over traditional identification technologies, like barcodes. Compared to this technology, RFID is, in fact, able to cover larger distance and does not require line-of-sight, that represent important improvements in the considered field of application. An RFID system is formed by a set of n tags, that ...

The concept of a common control model for all tag readers is targeted towards a single interface for all embedded tag reader control and interface programs. We discovered that as we developed a wide range of tag readers certain functionality was common to all of them. We are attempting to develop a standard set of possible control commands that an external agent would need to be able to control...

In a Radio Frequency Identification (RFID) System, collision between tags is one of the core problems that we must consider about. In general, a collision will occur when more than one tag communicates with the reader simultaneously, reducing the system efficiency. To solve this, dynamic frame slotted ALOHA (DFSA) is widely adopted nowadays, and as a variant of DFSA algorithm, Q-algorithm is ac...

High-frequency backscatter radio systems operate in the backscatter channel, a channel whose envelope probability density function (PDF) and bit-error-rate (BER) performance are strongly affected by the relationship between small-scale fading in the reader-to-tag and tag-to-reader propagation links – i.e., link correlation. This paper shows that backscatter radio systems using co-located reader...

This thesis presents HiQ, a hierarchical, online learning algorithm that finds dynamic solutions to the Reader Collision Problem in RFID systems. When the transmissions from one reader interfere with the operation of another reader, a reader collision occurs. ̊ The objective of the Reader Collision Problem is to minimize the reader collisions experienced by RFID readers while using the minimum n...

 Our major contribution in this field is to clarify the differences between two RFID privacy notions: one based on the indistinguishability of two tags (denoted as ind-privacy), and the other based on the unpredictability of the output of a protocol (denoted as unp-privacy). It is proven that ind-privacy is weaker than unp-privacy. Moreover, the minimal (necessary and sufficient) condition on ...

This paper proposes a novel method to suppress tag collision in the ISO 18000-6 type B protocol which is one of the standard protocols of UHF RFID systems. The anti-collision performance in terms of the total identification time is improved by reducing the length of bits and the number of transmission commands required for multi-tag identification in the ISO 18000-6 type B protocol. Simulation ...

A novel design concept of a compact printable orientation independent chipless RFID tag is presented. The tag consists of a circular patch loaded with multiple slot ring resonators. This symmetric frequency domain based tag has the advantage to be read from any orientation with the reader antennas. The tag can be read in close proximity by chipless RFID tag reader with waveguide(s) and also can...