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 ...
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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.
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 an...
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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.
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 cont...
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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.
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 cont...
详细信息
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.
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 algo...
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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.
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 algo...
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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%.
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 mult...
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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.
With the rapid advancement of information technology, RFID (Radio Frequency Identification), as a non-contact automatic identification technology, has garnered widespread application and attention globally due to its ...
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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, paramet...
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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.
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 ...
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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.
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