Fast identifying method of tag type in radio frequency identification system

Abstract

The invention discloses a fast identifying method of tag type in a radio frequency identification system. The method comprises the following steps: A. setting all possible sets of the tag type as a universal set N which comprises N elements, setting the types of tags to be identified as a set T which comprises t tags, and setting the probability of identification errors of tag types as is an element of a set; B. judging whether the radio frequency identification system is limited by length of time slot frames or not; and C. sequentially finding corresponding Xi=0 for each time slot in Z, then removing the Xi from the set N, and finally obtaining the rest element set which is the type set T of the tags to be identified, wherein the set of zero time slots is marked as Z, Xi=1 represents that i belongs to T, and Xi=0 represents that i is not belongs to T. According to the fast identifying method, the identifying speed is ensured by high probability, so that the method is a tag type identifying method suitable for large-scale radio frequency identification system, and has the characteristics of high robustness, strong expandability, small delay and the like.

Description

technical field [0001] The invention relates to the technical field of radio frequency identification, in particular to a method for quickly identifying label categories in a radio frequency identification system. Background technique [0002] Radio Frequency Identification (RFID) technology has been widely used in electronic passports, supply chain management, retail goods and books, and item tracking. Usually a radio frequency tag (Tag) contains a unique identifier (ID), which contains information such as the tag manufacturer, commodity producer and commodity category (such as ISBN code). Traditional radio frequency identification technology is usually used to find or collect information on all IDs in a tag collection. However, with the large-scale application of radio frequency identification systems, the number of tags has increased dramatically. In many cases, people are only interested in the categories of commodities. If the information of commodity categories is kno...

AI Technical Summary

Problems solved by technology

However, directly applying the above-mentioned tag ID recognition algorithms to identify commodity categories will bring high delays and cannot meet the application requirements of large-scale radio frequency identification systems.

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