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Method for estimating number of radio frequency tags based on geometric distribution

A radio frequency tag and geometric distribution technology, applied in the field of radio frequency identification, can solve problems such as poor scalability and large time delay

Active Publication Date: 2013-10-02
无锡赛睿科技有限公司
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Problems solved by technology

In the field of traditional tag identification, the unique identifier of each tag can be collected one by one, and then an accurate estimate of the number of tags can be obtained through the statistics of the management software, but this method often brings a large time delay. Poor scalability in RFID management systems

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  • Method for estimating number of radio frequency tags based on geometric distribution
  • Method for estimating number of radio frequency tags based on geometric distribution
  • Method for estimating number of radio frequency tags based on geometric distribution

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Embodiment Construction

[0028] The present invention will be further described below in conjunction with drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only parts related to the present invention are shown in the drawings but not all content.

[0029] Such as figure 1 and figure 2 As shown, now combine figure 1 and figure 2 The theoretical basis of the present invention will be described.

[0030] The tag number estimation system includes several readers and a set of tags to be estimated. The readers are controlled by time synchronization technology, which can realize the synchronous sending of multi-reader instructions and the synchronous integration of reply results. Coverage of different subsets of tags can be repeated between readers. The tag internally stores a unique identifier a...

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Abstract

The invention discloses a method for estimating the number of radio frequency tags based on geometric distribution, which comprises the following steps: A, a plurality of readers are controlled by utilizing time synchronization technology, and meanwhile wireless signals are simultaneously transmitted to a to-be-estimated tag collection within the scope of reading. B, after a tag receives the wireless signals, a corresponding time slot reply reader is determined. C, the reader generates the estimation vector and performs analysis and calculation to the estimation vector, so that the estimation value of the number of tags in the to-be-estimated tag collection is obtained. According to the method, the accurate estimation of the number of tags can be obtained by using only few time slots, so that the requirements of the mobile network environment and other scenes sensitive to time are satisfied, and meanwhile, when the estimation of the number of tags is performed, strict and non-redundant partition performed to the to-be-estimated tag collection is not required, that is, tag sub-collection which is covered with each reader can be overlapped for a part or not be overlapped, the final estimation accuracy is not affected, and the method is suitable for actual situations better.

Description

technical field [0001] The invention relates to the technical field of radio frequency identification, in particular to a method for estimating the number of radio frequency tags based on geometric distribution. Background technique [0002] Radio Frequency Identification (RFID) technology has been widely used in wireless positioning, object tracking and dynamic monitoring and other fields. A typical radio frequency identification system usually includes a radio frequency reader (referred to as a reader), a radio frequency tag (referred to as a tag), and middleware and background software. The reader activates the tag by transmitting a radio frequency signal and waits for a reply from the tag. There is usually a certain storage function in the label to save data such as unique identifiers. Middleware and background software are mainly responsible for the management functions of radio frequency tags, such as tag query, authentication, revocation, key distribution, etc. [...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G06K7/00
Inventor 龚伟刘克斌刘云浩李向阳
Owner 无锡赛睿科技有限公司
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