Missing tag uncertainty parallel detection method of anonymous multi-group radio frequency identification system
A technology of a radio frequency identification system and a detection method, which is applied in the field of radio frequency identification system and non-deterministic parallel detection of lost tags, can solve the problems of low detection efficiency and low utilization rate of time slots, and achieve the effect of reducing detection time and improving detection efficiency.
Inactive Publication Date: 2017-08-11
CHINA UNIV OF PETROLEUM (EAST CHINA) +1
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[0005] Aiming at the above-mentioned deficiencies in the prior art, such as low detection efficiency and low time slot utilization rate, the present invention provides a non-deterministic parallel detection method for lost tags in an anonymous multi-group radio frequency identification system, which can improve the time slot utilization rate, Improving the detection speed of lost tags can effectively protect the privacy of tag ID information, and at the same time meet the detection reliability requirements of each group, and is more suitable for large-scale anonymous multi-group radio frequency identification systems
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[0043] Example: see figure 1 , the read head first determines the round r of detection. For the k-th round of detection, in the initial stage, the read head first determines the frame length f of the current round of detection k , and generate a random number seed R for this round of detection k . In order to determine the detection r and the frame length f during each round of detection, the read head first estimates the total number m of missing tags in the anonymous multi-group RFID system described above. After estimating the number of missing labels, use Indicates that the read head can use the formula (1) to calculate r and f.
[0044] Since the read head is able to obtain the ID of each tag, it can predict the state of each slot of the current frame, such as figure 1 Shown is the expected frame state. Read head with VS k Indicates the set vector of the kth round, including f k elements, each element records the state of the corresponding time slot, namely: se...
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The present invention relates to a missing tag uncertainty parallel detection method of an anonymous multi-group radio frequency identification system. The method comprises: a reader calculates an optimal detection turn r and the frame length fk of a current k turn under the condition that the detection reliability degree of an anonymous multi-group radio frequency identification system is satisfied; the reader predicts the state of each time slot, detects the actual state of each time slot and determines whether a corresponding group has missing tags or not through comparison of the discrimination between the prediction state and the actual state; and if the reader detects that all the groups have missing tags, the reader stops detection, or else, the reader completes the execution of the remaining r-k turn, and completes the missing tag parallel detection of the whole anonymous multi-group radio frequency identification system. The missing tag uncertainty parallel detection method of the anonymous multi-group radio frequency identification system can realize parallel missing tag detection of multi-group tags to effectively protect tag privacy and effectively reduce the detection time and improve the detection efficiency on the premise of ensuring the detection reliability degree required by the anonymous multi-group radio frequency identification system.
Description
technical field [0001] The invention belongs to the technical field of radio frequency identification and the Internet of Things, and relates to a radio frequency identification system, in particular to a non-deterministic parallel detection method for lost tags of an anonymous multi-group radio frequency identification system. Background technique [0002] Radio Frequency Identification (English: Radio Frequency Identification, referred to as: RFID) system usually consists of a background server, one or more reading heads (English: Reader) and a large number of tags (English: Tag), the reading head can communicate with the radio frequency through the wireless channel Tags within transmission range communicate one-to-one. The background server pre-stores the ID of each tag, and can exchange information with the reading head through wired or wireless methods. In order to solve the data packet conflict in the radio frequency identification system, the Framed Slotted Aloha (Fr...
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Login to View More IPC IPC(8): G06K7/10G06K17/00
CPCG06K7/10039G06K17/0029
Inventor 陈鸿龙丁鑫旺付金楠林凯刘璐石乐义
Owner CHINA UNIV OF PETROLEUM (EAST CHINA)