scholarly journals An Efficient Q -Algorithm for RFID Tag Anticollision

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Lingyun Zhao ◽  
Lukun Wang ◽  
Shan Du
Keyword(s):  
Large Scale ◽  
Item Information ◽  
Rfid Tags ◽  
Uhf Rfid ◽  
Tag Identification ◽  
Rfid Tag ◽  
Iot Applications ◽  
Rfid System ◽  
Collision Problem ◽  
Radiofrequency Identification

In large-scale Internet of Things (IoT) applications, tags are attached to items, and users use a radiofrequency identification (RFID) reader to quickly identify tags and obtain the corresponding item information. Since multiple tags share the same channel to communicate with the reader, when they respond simultaneously, tag collision will occur, and the reader cannot successfully obtain the information from the tag. To cope with the tag collision problem, ultrahigh frequency (UHF) RFID standard EPC G1 Gen2 specifies an anticollision protocol to identify a large number of RFID tags in an efficient way. The Q -algorithm has attracted much more attention as the efficiency of an EPC C1 Gen2-based RFID system can be significantly improved by only a slight adjustment to the algorithm. In this paper, we propose a novel Q -algorithm for RFID tag identification, namely, HTEQ, which optimizes the time efficiency of an EPC C1 Gen2-based RFID system to the utmost limit. Extensive simulations verify that our proposed HTEQ is exceptionally expeditious compared to other algorithms, which promises it to be competitive in large-scale IoT environments.

scholarly journals Experimental Study on Inkjet-Printed Passive UHF RFID Tags on Versatile Paper-Based Substrates

2016 ◽  
Vol 2016 ◽  
pp. 1-8 ◽  
Author(s):  
Han He ◽  
Lauri Sydänheimo ◽  
Johanna Virkki ◽  
Leena Ukkonen
Keyword(s):  
Substrate Material ◽  
Optimal Number ◽  
Rfid Tags ◽  
Uhf Rfid ◽  
Rfid Tag ◽  
Passive Uhf Rfid ◽  
Wireless Applications ◽  
Efficient Manufacturing ◽  
Nanoparticle Ink ◽  
Pattern Resolution

We present the possibilities and challenges of passive UHF RFID tag antennas manufactured by inkjet printing silver nanoparticle ink on versatile paper-based substrates. The most efficient manufacturing parameters, such as the pattern resolution, were determined and the optimal number of printed layers was evaluated for each substrate material. Next, inkjet-printed passive UHF RFID tags were fabricated on each substrate with the optimized parameters and number of layers. According to our measurements, the tags on different paper substrates showed peak read ranges of 4–6.5 meters and the tags on different cardboard substrates exhibited peak read ranges of 2–6 meters. Based on their wireless performance, these inkjet-printed paper-based passive UHF RFID tags are sufficient for many future wireless applications and comparable to tags fabricated on more traditional substrates, such as polyimide.

scholarly journals A Fast Hybrid Strategy-Based RFID Tag Identification Protocol

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Xinyan Wang
Keyword(s):  
Rfid Technology ◽  
Identification Performance ◽  
Total Response ◽  
Tag Identification ◽  
Hybrid Strategy ◽  
Rfid Tag ◽  
Rfid Systems ◽  
Radiofrequency Identification ◽  
Critical Problems ◽  
Transmission And Reflection

Tag collision is one of the critical problems in radiofrequency identification (RFID) technology which can be widely used to identify objects using tag attachment automatically. Through the transmission and reflection of wireless radiofrequency signals, noncontact identification is realized. However, when multiple tags respond to the reader simultaneously, a collision occurs, significantly degrading the identification performance of RFID systems. To tackle the tag collisions, we propose a fast hybrid strategy-based RFID anticollision (FHS-RAC) protocol. Based on the conventional query tree algorithm, the proposed FHS-RAC makes full use of collision bits and the total response bits to achieve the faster tag identification. Extensive simulations and experiments verify the feasibility and effectiveness of our proposed scheme.

scholarly journals Design of Nested H slot Passive UHF RFID Tag

2020 ◽  
Vol 10 (1) ◽  
pp. 346-349
Keyword(s):  
High Frequency ◽  
Microstrip Antenna ◽  
Rfid Tags ◽  
Uhf Rfid ◽  
Antenna Structure ◽  
Rfid Tag ◽  
Passive Uhf Rfid ◽  
Related Information ◽  
Distance Communication ◽  
Passive Rfid

RFID is a short distance communication system which comprises of a RFID tag, a RFID reader and a personal computer with desired software that can maintain the related information. These RFID tags can be of active or passive types. This paper focuses on design, simulation and fabrication of passive ultra-high frequency RFID tag (microchip and an antenna) which resonates at the frequency 866 MHz in the Industrial Scientific Medical Band. The nested H-slot inverted-F microstrip antenna structure is used for the design of passive RFID tag. It examines the specific tag geometry and its characteristics to optimize the PIFA antenna and in turn RFID tag’s performance.

Adaptive Framework for Collisions in RFID Tag Identification

2008 ◽  
Vol 07 (01) ◽  
pp. 9-14 ◽  
Author(s):  
Selwyn Piramuthu
Keyword(s):  
Supply Chain ◽  
Radio Frequency Identification ◽  
Rfid Tags ◽  
Tag Identification ◽  
Seamless Integration ◽  
Essential Information ◽  
Rfid Tag ◽  
Frequency Identification ◽  
Pass Through ◽  
Aloha Protocol

Radio Frequency Identification (RFID) is promising, as a technique, to enable tracking of essential information about objects as they pass through supply chains. Information thus tracked can be utilised to efficiently operate the supply chain. Effective management of the supply chain translates to huge competitive advantage for the firms involved. Among several issues that impede seamless integration of RFID tags in a supply chain, one of the problems encountered while reading RFID tags is that of collision, which occurs when multiple tags transmit data to the same receiver slot. Data loss due to collision necessitates re-transmission of lost data. We consider this problem when Framed Slotted ALOHA protocol is used. Using machine learning, we adaptively configure the number of slots per frame to reduce the number of collisions while improving throughput.

Implementation of a RFID-based System for Library Management

2015 ◽  
Vol 6 (3) ◽  
pp. 1-10 ◽  
Author(s):  
Kiyotaka Fujisaki
Keyword(s):  
Resonant Frequency ◽  
Data Exchange ◽  
Electromagnetic Coupling ◽  
Rfid Tags ◽  
Communication Performance ◽  
Rfid Tag ◽  
Library Management ◽  
Rfid System ◽  
Library Catalogue

Using electromagnetic coupling, an RFID tag can get power supplier by a reader and communicate with it for data exchange. Because the RFID system enables non-contact communication, various services and applications including the management of a library catalogue are possible. However, the system is affected easily by neighboring environment and the resonant frequency, thus the communication performance is degraded. In this paper, is used 13.56MHz RFID system for the management of the library. We evaluate the influence that papers or other RFID tags give to the resonant frequency of an RFID tag.

scholarly journals Stretchable Textile Yarn Based on UHF RFID Helical Tag

Textiles ◽  
2021 ◽  
Vol 1 (3) ◽  
pp. 547-557
Author(s):  
Sofia Benouakta ◽  
Florin Doru Hutu ◽  
Yvan Duroc
Keyword(s):  
Radio Frequency Identification ◽  
Textile Yarn ◽  
Radiative Properties ◽  
Rfid Tags ◽  
Uhf Rfid ◽  
Rfid Tag ◽  
Half Wave ◽  
Present Solution ◽  
Frequency Identification ◽  
Helical Geometry

In the context of wearable technology, several techniques have been used for the fabrication of radio frequency identification (RFID) tags such as 3D printing, inkjet printing, and even embroidery. In contrast to these methods where the tag is attached to the object by using sewing or simple sticking, the E-Thread® technology is a novel assembling method allowing for the integration of the RFID tag into a textile yarn and thus makes it embeddable into the object at the fabrication stage. The current E-Thread® yarn uses a RFID tag in which the antenna is a straight half-wave dipole that makes the solution vulnerable to mechanical strains (i.e., elongation). In this paper, we propose an alternative to the current RFID yarn solution with the use of an antenna having a helical geometry that answers to the mechanical issues and keeps quite similar electrical and radiative properties with respect to the present solution. The RFID helical tag was designed and simulated taking into consideration the constraints of the manufacturing process. The helical RFID tag was then fabricated using the E-Thread® technology and experimental characterization showed that the obtained structure exhibited good performance with 10.6 m of read range in the ultra high frequency (UHF) RFID band and 10% of tolerance in terms of elongation.

RFID Tag Collision Problem in Supply Chain Management

2019 ◽  
Vol 11 (3) ◽  
pp. 1-12
Author(s):  
Kamalendu Pal
Keyword(s):  
Supply Chain ◽  
Search Algorithm ◽  
Binary Search ◽  
Rfid Technology ◽  
Tag Identification ◽  
Chain Management ◽  
Rfid Tag ◽  
Identification Process ◽  
Collision Problem ◽  
Binary Search Algorithm

The use of Radio Frequency Identification (RFID) technology has attracted a huge attention from the supply chain business community. This is due to the use of RFID technology wide range of applications in the fields of logistics and supply chain management. This paper presents a brief overview of a simple industrial RFID system and then describe the basic concept of tag collision problem. Despite many useful applications, the RFID tag collision creates a major problem for fast tag identification process. There are different algorithmic solutions available to overcome tag collision problem in industrial supply chains. Based on binary search algorithm (BSA) of dynamic and backtracking, two variations of binary anti-collision search algorithms for tag identification processes are described in this paper. Simulation-based experimental results on the performance of these algorithms are evaluated when handling multiple RFID tags simultaneously. The backtracking binary search algorithm has obvious advantages in terms of tag identification process compared to the other two algorithms.

scholarly journals Double Loop Inductive Feed Patch Antenna Design for Antimetal UHF RFID Tag

2019 ◽  
Vol 2019 ◽  
pp. 1-8 ◽  
Author(s):  
Lingfei Mo ◽  
Chenyang Li
Keyword(s):  
Patch Antenna ◽  
Impedance Matching ◽  
Microstrip Antennas ◽  
Antenna Design ◽  
Rfid Tags ◽  
Manufacturing Cost ◽  
Planar Antenna ◽  
Double Loop ◽  
Uhf Rfid ◽  
Rfid Tag

Planar UHF RFID antimetal tag can be widely used for the metallic products or packages with metal material inside. A double loop inductive feed planar patch antenna is proposed for UHF RFID tag mounted on metallic objects. Compared to conventional microstrip antennas or PIFA antennas used for UHF RFID tags, the double loop inductive feed patch antenna has a planar structure, with no short via or short wall, which could decrease the manufacturing cost of the tags. The double loop inductive feed structure also increases the radiation performance of the planar antenna. Moreover, the double loop inductive feed structure makes the impedance of the patch antenna be tuned easily for conjugate impedance matching.

RFID Tag Anti-Collision Protocols

2012 ◽  
pp. 133-154 ◽  
Author(s):  
Ching-Nung Yang ◽  
Jyun-Yan He ◽  
Yu-Ching Kun
Keyword(s):  
Radio Frequency ◽  
Large Volume ◽  
Radio Frequency Identification ◽  
Binary Tree ◽  
Radio Frequency Field ◽  
Rfid Tag ◽  
Rfid System ◽  
Collision Problem ◽  
Query Tree ◽  
Frequency Identification

A tag collision problem (or missed reads) in Radio Frequency Identification (RFID) system happens when multiple tags respond to a reader simultaneously. At this time, the reader cannot differentiate these tags correctly. This problem is often seen whenever a large volume of RFID tags are read together in the same radio frequency field. Tag collisions will degrade identification efficiency, and this unreliable identification will compromise the usefulness of RFID system. This chapter introduces tag collision problem and discusses tag anti-collision protocols, including ALOHA-based protocol, Binary Tree (BT) protocol, and Query Tree (QT) protocol. To date, most tag anti-collision protocols are QT protocols. Thus, in this chapter, the authors briefly describe some elegant researches on QT protocols, and also introduce their recent research results on QT protocols.

scholarly journals A Miniaturized Meandered Dipole UHF RFID Tag Antenna for Flexible Application

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Xiuwei Xuan ◽  
Lianrong Lv ◽  
Kun Li
Keyword(s):  
Large Scale ◽  
Experimental Studies ◽  
Dipole Antenna ◽  
Threshold Power ◽  
Uhf Rfid ◽  
Minimum Threshold ◽  
Rfid Tag ◽  
Resonance Frequencies ◽  
Simulation Results ◽  
Flexible Application

A miniaturized meandered dipole antenna for UHF RFID tag is proposed. Different resonance frequencies and impedance can be achieved by adjusting the number of the meanders, which can help to reduce the size of the antenna. Due to the radiation patches, the input impedance of the antenna can be flexibly tuned in a large scale. The proposed antenna is printed on polyethylene (PET) substrate with a total volume of 48 mm × 13.7 mm × 0.5 mm. Modeling and simulation results show that the reflection coefficient of the antenna is less than −15 dB at 860–960 MHz. Experimental studies demonstrate that the minimum threshold power of the antenna is between 23 and 26 dBm and the measured read range is 3-4 m.

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