Abstract
As a perception enabling technology of the Internet of Things, RFID can quickly identify target objects. The tag‐to‐tag collision problem seriously affects the identification performance of the RFID system, which causes the reader to be unable to accurately identify any tag within the specific time. The mainstream anticollision algorithms are limited by the performance bottleneck under the standard framework. In this paper, we analyze the features and merits of three kinds of algorithms in detail and propose a new algorithm architecture for RFID anticollision. Through the extensive experimental results comparison, we prove that the new architecture is effective to improve the performance of DFSA algorithms. Finally, we summarize the future research trends in the RFID anticollision algorithms.
Highlights
Radio Frequency Identification (RFID) [1,2,3] technology is an emerging backscatter communication technology [4], which uses radio frequency signals to carry out information exchange in the wireless channel and realizes the noncontact identification between objects
We propose a new algorithm architecture in which the system throughput can break through the bottleneck of existing dynamic framed slotted Aloha (DFSA) algorithms
Taking into account factors such as RFID equipment cost and implementation complexity, currently, in RFID readers, multitag conflict avoidance technologies based on time division multiplexing are mainly used, which mainly include three types of methods based on Aloha, binary splitting, and query tree
Summary
Radio Frequency Identification (RFID) [1,2,3] technology is an emerging backscatter communication technology [4], which uses radio frequency signals to carry out information exchange in the wireless channel and realizes the noncontact identification between objects. Wireless Communications and Mobile Computing of algorithm is to use bit tracking technology [20, 21] to lock the specific location of ID information collisions, so that the reader can adjust the query prefix in time to successfully identify subsequent tags. In order to maximize the multitag recognition performance of the RFID system, many researchers have merged the advantages of different types of algorithms and proposed a series of hybrid anticollision algorithms. Compared with traditional anticollision algorithm, the above algorithms have been significantly improved in tag recognition performance, but at the same time, they caused some problems, such as high hardware cost, compatibility with existing RFID standards, and other issues. Different from the traditional DFSA algorithms, the proposed new method can separately cope with each collision slot with the independent small-size frame. The future research trends of anticollision algorithms are summarized
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