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3rd IEEE International Conference on Network Infrastructure and Digital Content. (IC-NIDC)

作者： Wang, Huiyang You, Xiangdong Cui, Yinghua Beijing Univ Posts & Telecommun Sch Informat & Commun Engn Beijing 100876 Peoples R China Beijing Informat Sci & Technol Univ Sch optoelectron & telecommunicat Engn Beijing 100101 Peoples R China

ISBN: (纸本)9781467322010;9781467322034

RFID is an essential technology in the Internet of things. Because it is a contactless, low power, and low cost wireless communication technology. During the process of tag identification, an efficient anti-collision algorithm will remarkably contribute to the RFID system in terms of accelerating identification speed. In this paper, a stack-like anti-collision algorithm is proposed, which is based on ISO 18000-6C. It can solve the problem of q value fluctuation to some degree and improve the system efficiency.

关键词： Anti-collision q-algorithm RFID

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An improved q-algorithm based on EPC Class 1 Generation 2 protocol 17

An improved Q-algorithm based on EPC Class 1 Generation 2 pr...

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2nd International Conference on Intelligent Information Processing (IIP)

作者： Peng, Lin Zeng, Yanhan Liu, Hanyu Tan, Hong-zhou Guangzhou Univ Sch Phys & Elect Engn Guangzhou Guangdong Peoples R China SYSU CMU Shunde Int Joint Res Inst Guangzhou Guangdong Peoples R China

ISBN: (纸本)9781450352871

In this paper, an improved q-algorithm based on Dynamic Framed Slotted Aloha (DFSA) used in EPC Class 1 Generation 2 (C1G2) protocol is proposed. In the proposed anti-collision algorithm, the total number of frames and the unnecessary sending of queryAdjust commands are reduced in the recognition process by calculating the optimal threshold for adjusting q. Besides, the identification efficiency and speed are improved by utilizing the Binary Selection (B-S) with Collision Processing Threshold (CPT) strategy and Prediction Bit (PB), respectively. Simulation results show that the improved q-algorithm costs less time slots and the system throughput fluctuates around 47% which is at least 20% higher than EPC C1G2.

关键词： UHF RFID anti-collision algorithm EPC C1G2 q-algorithm

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A STACK-LIKE OPTIMAL q-algorithm FOR THE ISO 18000-6C IN RFID SYSTEM

A STACK-LIKE OPTIMAL Q-ALGORITHM FOR THE ISO 18000-6C IN RFI...

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The 3rd IEEE International Conference on Network Infrastructure and Digital Content (2012年第三届IEEE网络基础设施与数字内容国际会议(IEEE IC-NIDC2012))

作者： Xiangdong You Huiyang Wang Yinghua Cui School of Information and Communication Engineering Beijing University of Posts and Telecommunicatio School of optoelectronics and telecommunication engineering Beijing Information Science and Technolo

RFID is an essential technology in the lnternet of *** it is a contacttess,low power,and low cost wireless communication *** the process of tag identification,an efficient anti-collision algorithm will remarkably contribute to the RFID system in terms of accelerating identification *** this paper,a stack-like anti-collision algorithm is proposed,which is based on ISO *** can solve the problem of q value fluctuation to some degree and improve the system efficiency.

关键词： Anti-collision q-algorithm RFID

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A STACK-LIKE OPTIMAL q-algorithm FOR THE ISO 18000-6C IN RFID SYSTEM

A STACK-LIKE OPTIMAL Q-ALGORITHM FOR THE ISO 18000-6C IN RFI...

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2012 3rd IEEE International Conference on Network Infrastructure and Digital Content

作者： Huiyang Wang 1,Xiangdong You 1,Yinghua Cui 2 1 School of Information and Communication Engineering,Beijing University of Posts and Telecommunications,Beijing 100876,China 2 School of optoelectronics and telecommunication engineering,Beijing Information Science and Technology University,Beijing 100101,China

RFID is an essential technology in the Internet of *** it is a contactless,low power,and low cost wireless communication *** the process of tag identification,an efficient anti-collision algorithm will remarkably contribute to the RFID system in terms of accelerating identification *** this paper,a stack-like anti-collision algorithm is proposed,which is based on ISO *** can solve the problem of q value fluctuation to some degree and improve the system efficiency.

关键词： Anti-collision q-algorithm RFID

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An RFID anti-collision q-value algorithm research

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INTERNATIONAL JOURNAL OF RF TECHNOLOGIES-RESEARCH AND APPLICATIONS 2019年第1-2期10卷 27-37页

作者： Chen, Zhongping Hunan Vocat Coll Engn Changsha 410151 Hunan Peoples R China

RFID technology is an important technology of the Internet of Things. The key to realizing large-scale applications is to improve the efficiency of the system. For this reason, a novel RFID anti-collision q-value algorithm is proposed, which changes the q-rounding of the original q-value algorithm to 2q rounding, so that the adjusted frame length is closer to the theoretical optimal value, thereby the convergence is effectively reduced. Slot utilization of time is improved. By comparison, the actual throughput of the improved algorithm remains at a high level (average is 0.311 3), the total number of time slots is reduced by 26.7% when it is compared with the original q-value algorithm.

关键词： Internet of things Radio Frequency Identification(RFID) anti-collision algorithm EPC-C1G2 q-algorithm

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A Non -integral-q algorithm for RFID System in Anti-collision 2

A Non -integral-Q Algorithm for RFID System in Anti-collisio...

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2nd International Conference on Control, Automation and Robotics (ICCAR)

作者： Zhu, Boyuan Wang, Jue Zeng, Guigen Nanjing Univ Posts & Telecommun Sch Telecommun & Informat Engn Nanjing Jiangsu Peoples R China

ISBN: (纸本)9781467398596

RFID technology is one of four basic technologies in the Internet of Things. In order to realize its intensive and large-scale uses, the key point is to increase the identification speed of tags. The conventional algorithm only uses integral q which decreases the efficiency dramatically. In order to decrease the convergence time and rise the slot efficiency, this article proposes a novel anti-collision algorithm based on non integral q-a key parameter determining the frame length. By turning the rounding q in the conventional q-algorithm into rounding 2(q), the frame length can get closer to its optimal value. Monte-Carlo simulation result shows that the improved algorithm can keep the throughout rate in a relatively high level (about 0.31) and decrease the total number of time-slots by about 30%.

关键词： RFID anti-collision algorithm EPC-CIG2 q-algorithm

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q-frame-collision-counter: a novel and dynamic approach to RFID Gen 2's q algorithm

Q-frame-collision-counter: a novel and dynamic approach to R...

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IEEE International Conference on RFID Technology and Applications (RFID-TA)

作者： Khanna, Nikita Uysal, Ismail Univ S Florida Elect Engn Tampa FL 33620 USA

ISBN: (纸本)9781479979905

Radio frequency identification (RFID) systems are increasingly used for a wide range of applications from supply chain management to healthcare. In a typical RFID system, a reader (interrogator) communicates with multiple tags (transponders) for information exchange. If multiple tags try to communicate with the reader at the same time, a collision occurs leading to failed communications. As RFID usage in high tag density environments, such as in apparel industry, becomes more prevalent, addressing the collision problem takes priority. In this paper, we propose a dynamic modification to the existing q-algorithm used as part of the industry standard EPC Class 1 Generation 2 (Gen 2) protocol for passive RFID systems to improve system efficiency and reduce the number of collisions. Using radar cross section scatter plots, the number of tags in a given time slot is estimated and a q-Frame-Collision-Counter (qFCC) is used to make an informed adjustment to the next frame size instead of simply adding a parametric constant to the q parameter. Contrary to most of the existing proposals in the literature for improved collision algorithms, this approach does not require any change in the existing standard Gen 2 protocol timings and/or command structure. In fact, all Gen 2 compliant commercial tags can be directly used with the proposed modification which still provides an efficiency gain of up to 7.5% compared to the existing standard and a more robust performance throughout the Gen 2 parameter spectrum such as q and C.

关键词： RFID Gen 2 q-algorithm qFCC algorithm Anti-Collision Aloha

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A Novel Multidimensional q-Selection with Random Tree for an Anti-Collision algorithm in RFID Systems

A Novel Multidimensional Q-Selection with Random Tree for an...

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9th International Conference on Intelligent Information Hiding and Multimedia Signal Processing (IIH-MSP)

作者： Jin, Xiaofang Zhu, Yun Jin, Libiao Liu, Mengxuan Bai, Yu Commun Univ China Sch Informat Engn Beijing Peoples R China Beijing Univ Chem Technol Sch Automat Beijing Peoples R China

ISBN: (纸本)9780769551203

A reader should identify tags quickly and accurately, so an anti-collision algorithm is an important part in a RFID system. q-algorithm is a hot topic in anti-collision algorithms. In EPC Global Class-1 Gen-2, parameter q is adopted to adjust the frame sizes dynamically;in ISO/IEC 18000-6 Type C, q-algorithm with a parameter C makes reduction of equipment loss by lessening adjustments of q, but it compromises to the system efficiency. In this paper, a Multidimensional q-Selection with Random Tree algorithm (MqRT) is proposed. It is a hybrid method of q-algorithm and deterministic algorithm and can lessen unnecessary adjustments of q and raise system efficiency. The simulation results show that this algorithm can achieve some improved performances than other previous algorithms.

关键词： RFID System Anti-Collision algorithm q-algorithm Multidimensional q-Selection Random Tree algorithm

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An efficient RFID anticollision algorithm using early adjustment of frame length

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INTERNATIONAL JOURNAL OF COMMUNICATION SYSTEMS 2016年第18期29卷 2568-2579页

作者： Chen, Wen-Tzu Natl Cheng Kung Univ Inst Telecommun Management Tainan Taiwan

This paper proposes a radio frequency identification (RFID) anticollision algorithm to enhance the read performance of the EPCglobal UHF Class-1 Generation-2 standard. Our algorithm is based on the mechanism of early adjustment of frame length, as well as dynamic framed slotted ALOHA. To reduce computation complexity, the proposed algorithm adopts a simple rule for a reader to determine when and how the early adjustment starts. Furthermore, the proposed method resorts to at most three examinations of whether the early adjustment should start in each read round. As compared with the algorithms of examining at every time slot, the proposed method can significantly reduce the number of examinations. The normalized throughput of our method can reach a value of up to 34.6%. The advantage of low computation complexity comes at the expense of only 1.4% degradation of throughput. Therefore, it is suitable for most RFID readers built with a capability-limited microprocessor. Copyright (C) 2015 John Wiley & Sons, Ltd.

关键词： RFID EPCglobal q-algorithm DFSA early adjustment

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An Optimized NS2 Module for UHF Passive RFID Systems

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JOURNAL OF ELECTRONIC TESTING-THEORY AND APPLICATIONS 2019年第1期35卷 45-58页

作者： Benfraj, Rahma Beroulle, Vincent Fourty, Nicolas Meddeb, Aref Univ Grenoble Alpes Inst Engn LCIS Grenoble INP F-26000 Valence France Univ Tunis El Manar Natl Engn Sch Tunis Tunis Tunisia Univ Sousse NOCCS Natl Engn Sch Sousse Sousse Tunisia

Radio Frequency Identification (RFID) technology has the potential to dramatically improve numerous industrial practices. However, it still faces many challenges, including tag collisions and reliability, which may limit its use in many application scenarios. In UHF RFID systems, many collisions happen due to the numerous tag responses generated by the inventory process. Also, given the low cost and low performance of UHF RFID tags combined with harsh environments, RFID communications must deal with high Bit-Error-Rate (BER). As a matter of fact, the extra identification delays added by these collisions and communication errors can bring to a waste of bandwidth and more time inventory. The efficiency of tag identification is related to the performance of the anti-collision algorithm. To evaluate this performance, an UHF RFID module has already been developed in the NS2 simulator. This NS2 RFID module implements an RFID system based on the anti-collision q-algorithm (q-Algo) of the EPC Global Protocol Class-1 Generation-2 Standard. In this paper, first, we propose an optimization of this NS2 RFID module by implementing and validating a more realistic version of the q-Algo. Secondly, we add to this module some fault injection capabilities to evaluate with NS2 the UHF RFID system robustness in presence of communication errors. Finally, we show how this NS2 UHF RFID module is much more realistic for the timing evaluation in presence of communication errors.

关键词： UHF RFID q-algorithm Fault injection NS2

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