RFID tag information sampling method

Abstract

The invention provides an RFID tag information sampling method, relates to the technical field of Internet of Things network information, and solves the problem of tag information sampling in an RFIDsystem by designing a protocol PS between an RFID reader and tags in a tag overall set S. The protocol PS disclosed by the invention comprises two stages, the states of the tags are determined in thetwo stages respectively, that is, PS-1 adopts a first random seed to calculate a hash function to randomly extract K labels from N different tags of the tag overall set S to form a label information sampling subset T, and the probability that any subset with K labels in the label overall set S is selected as T is equal; in the PS-2 stage, a second random seed calculation hash function is combinedwith the characteristics of the RFID reader to determine the state change of the tags under multiple rounds of communication rounds, so that any tag in the tag information sampling subset T is informed of the unique sequence to report the tag information to the RFID reader.

Description

technical field [0001] The invention relates to the technical field of Internet of Things network information, in particular to an RFID tag information sampling method. Background technique [0002] Over the past decade, radio frequency identification (RFID) technology has been widely used to track moving objects, manage supply chains, and control warehouse inventory. Conceptually, the RFID system in these applications consists of three components, including RFID tags, RFID readers, and back-end servers. [0003] Among them, each RFID tag has a unique 96-bit or 128-bit ID, stored in its chip, attached to different physical objects, and used as the unique identifier of these objects. The tag also carries tag information, which may be attribute data of the tag object or sensor data (such as environmental data). In many applications, RFID tags can monitor the state of tagged objects or surrounding environmental conditions by adding sensors. Each RFID reader is deployed at a ...

AI Technical Summary

Problems solved by technology

[0007] In order to design a protocol with low communication cost and effectively solve the problem of tag information sampling, there are two technical problems; first, in order to obtain a clear communication cost, it is necessary to analyze the basic Information sampling problem, the process is very complex, it is necessary to convert the protocol of the label information sampling problem into an encoding process of any label information sampling subset representing the label population

In the existing technology, there is no communication cost lower bound that can directly depend on the application

Secondly, we need to design a protocol and be able to prove the effectiveness of the protocol. This process is also difficult to implement, because the user cannot pre-set a sample subset of tag information with K tags, and it is also necessary to ensure that the total set of tags S with Each subset of label information samples of K labels has an equal probability of being selected

At the same time, each label in the sampling subset T must be quickly informed of the label information in a unique order in {1,2,...,K}, which is more difficult

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