Radio Frequency Identification (RFID) is an emerging wireless technology with highly promising applications in the future pervasive computing scenario. In an RFID system, the anti-collision algorithm is one of the pri...
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ISBN:
(纸本)9780769528472
Radio Frequency Identification (RFID) is an emerging wireless technology with highly promising applications in the future pervasive computing scenario. In an RFID system, the anti-collision algorithm is one of the primary mechanisms to address the issue of multi-object identification. This paper firstly introduces the basics of the anti-collision algorithm in RFID system. Then, Field Programmable Gate Array (FPGA) implementation for the algorithm is presented in detail for the sake of avoiding the disadvantage of pure software-based development. In particular, the Manchester coder and decoder for the RFID system have been realized and simulated by using FPGA simulator. The performance of the anti-collision algorithm is evaluated with respect to the metrics the largest number of identified tags per reading, the identification speed and the algorithm efficiency. The methodology and also the result are helpful for designing, deploying and implementing a practical RFID system.
There are two basic approaches to solve the tag collision: deterministic collision resolution and stochastic collision resolution. These resolutions are all in the assumption that the number of the tags in the area do...
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ISBN:
(纸本)9781424415304
There are two basic approaches to solve the tag collision: deterministic collision resolution and stochastic collision resolution. These resolutions are all in the assumption that the number of the tags in the area doesn't change. This algorithm gets over this disadvantage;the tags can enter into the reader's area in the dynamic mode at any moment. According t the reader's identified result each time, the tags can modify their responsive probability in the incremental or degressive mode. This bi-directional operation considers the impartiality of identification. This algorithm adopts Markov chain, and provides the analysis of the efficiency in the situation that tags appear in different patterns.
There are two basic approaches to solve the tag collision: deterministic collision resolution and stochastic collision resolution. These resolutions are all in the assumption that the number of the tags in the area do...
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ISBN:
(纸本)9781424415304;1424415306
There are two basic approaches to solve the tag collision: deterministic collision resolution and stochastic collision resolution. These resolutions are all in the assumption that the number of the tags in the area doesn’t change. This algorithm gets over this disadvantage;the tags can enter into the reader’s area in the dynamic mode at any moment. According to the reader’s identified result each time, the tags can modify their responsive probability in the incremental or degressive mode. This bi-directional operation considers the impartiality of identification. This algorithm adopts Markov chain, and provides the analysis of the efficiency in the situation that tags appear in different patterns.
This paper presents a case study to apply the RFID (Radio Frequency Identification) technology to dynamically track miscellaneous logistics information of the shipping containers to improve the container transportatio...
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ISBN:
(纸本)9780769541105
This paper presents a case study to apply the RFID (Radio Frequency Identification) technology to dynamically track miscellaneous logistics information of the shipping containers to improve the container transportation management and digitalization level. The system architecture and configuration of the RFID system are illustrated and the requirements of the container RFID system are characterized. The hardware circuit of the electronic tags in an active RFID system is designed. The tags designed are of small volume and low power consumption with an identification sensitive distance up to 20m. The anti-collision mechanism for the electronic tags is discussed and an adaptive anti-collision algorithm based on the slotted ALOHA algorithm is proposed. The proposed algorithm proves that it is effective to improve the message channel utilization rate and the tag identification rate.
This paper presents a case study to apply the RFID (Radio Frequency Identification)technology to dynamically track miscellaneous logistics information of the shipping containers to improve the container transportation...
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This paper presents a case study to apply the RFID (Radio Frequency Identification)technology to dynamically track miscellaneous logistics information of the shipping containers to improve the container transportation management and digitalization *** system architecture and configuration of the RFID system are illustrated and the requirements of the container RFID system are characterized. The hardware circuit of the electronic tags in an active RFID system is *** tags designed are of small volume and low power consumption with an identification sensitive distance up to *** anti-collision mechanism for the electronic tags is discussed and an adaptive anti-collision algorithm based on the slotted ALOHA algorithm is proposed. The proposed algorithm proves that it is effective to improve the message channel utilization rate and the tag identification rate.
The 900 MHz UHF passive RFID systems have drawn attraction because they have long access distance and rapid identification speed. One of the most representative international standards is EPCglobal Class1 Generation2 ...
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ISBN:
(纸本)9789898111623
The 900 MHz UHF passive RFID systems have drawn attraction because they have long access distance and rapid identification speed. One of the most representative international standards is EPCglobal Class1 Generation2 (EPCglobal Gen2). RN16 which is used in the EPCglobal Gen2 standard assists a reader to detect tag collision rapidly, but it may be removed because it does not have information of products. In this paper, we propose an algorithm to replace RN16 with CRC-16 to reduce the identification time. We show that CRC-16 has similar characteristics of RN16 and our proposed scheme reduces the number of bits required for one tag identification.
A design method of low power anti-collision RFID system is presented in this paper. The system power consumption is effectively reduced by circuit design and work mode selecting. An improved anti-collision algorithm i...
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ISBN:
(纸本)9781424425020
A design method of low power anti-collision RFID system is presented in this paper. The system power consumption is effectively reduced by circuit design and work mode selecting. An improved anti-collision algorithm is used in the system, reducing both the tag collision probability and the power consumption. The design method has been used in a 433MHz RFID system, enhancing the identification efficiency and reducing the system power consumption successfully.
This paper analyses the practical faults existing in Enhanced Dynamic Frame Slotted ALOHA (EDFSA) algorithms, and discusses the strategy to improve the efficiency of anti-collision algorithm in RFID system. EDFSA algo...
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ISBN:
(纸本)9781424410347
This paper analyses the practical faults existing in Enhanced Dynamic Frame Slotted ALOHA (EDFSA) algorithms, and discusses the strategy to improve the efficiency of anti-collision algorithm in RFID system. EDFSA algorithm divides the tags into a number of groups and allows only one group of tags to respond when the number of tags is much larger than optimal efficiency tags. However the efficiency of the system can still be improved. We propose a new anti-collision algorithm called by the name of Variant Enhanced Dynamic Frame Slotted ALOHA algorithm (VEDFSA) to improve the efficiency of the system that can solve the problem above by dynamic divide tags into groups during the anti-collision solving procedure.
RFID system is widely used in many fields, such as industry automation, commercial automation and traffic control system. Tag collision, causing the RFID reader can not identify the tag data, is a serious problem as s...
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RFID system is widely used in many fields, such as industry automation, commercial automation and traffic control system. Tag collision, causing the RFID reader can not identify the tag data, is a serious problem as several tags use the same communication channel simultaneously. Framed slotted ALOHA algorithm is normally used to solve the RFID collision problem. It is simple and shows good performance when the tags number is small. But it requires an exponentially increasing number of slots with the tags number increasing. An improved anti-collision algorithm is proposed in this paper, which combines the tags frequencies division technique, the frequency poll hopping technique to the frame slotted ALOHA algorithm. The proposed algorithm has a lower collision probability and needs fewer slots with a tag identification efficiency improved significantly. The proposed algorithm has been used in 433 MHz RFID system and reduces the tag collision probability efficiently.
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