Method for recognizing electronic label by RFID system and RFID system

Abstract

The invention discloses a method for identifying an electronic label in an RFID system, and the RFID system. The method expresses the mathematical expectation value c1' of a timeslot number with electronic label response within the timeslot according to the probability theory of the electronic label for choosing the timeslot, and the mathematical expectation value c0' of an empty timeslot number without the electronic label response within the timeslot; the total number of the responding labels is estimated according to that c<k> equals to N minus c0' and c1'; then n', the number of the electronic labels which are not identified is estimated; later, the length of a frame which is set in the next response process is close to n', the number of the electronic labels. In the invention, the n', the number of the electronic labels to be identified is estimated according to the probability theory of the electronic label for choosing the timeslot, thus ensuring that the length of the frame set in the following responding process is close to the n', the number of the labels to be identified, as far as possible and the efficiency of identifying the electronic labels by the system reaches the maximum, and meanwhile, the timeslot number needed in the process of identifying the electronic labels is also the least. The method of the invention is easy to realize and has relatively high identifying efficiency (close to the theoretical max) especially under the condition of multiple electronic labels.

Description

technical field [0001] The invention relates to the technical field of radio frequency identification, in particular to a method for identifying an electronic tag by an RFID system and an RFID system. Background technique [0002] Radio Frequency Identification (RFID, Radio Frequency Identification) is a wireless non-contact automatic identification technology that uses radio frequency communication to achieve rapid application development in recent years, and its application requirements in shopping malls, logistics, transportation, military and other fields are increasing. For example: the multinational company Wal-Mart has decided that every product sold in its supermarkets must use RFID to realize automatic vending management; my country's Guangzhou-Shenzhen high-speed railway tickets have successfully adopted RFID technology. The first generation of RFID has been used for several years, but its application scale is limited due to its short range, large size of electroni...

AI Technical Summary

Problems solved by technology

[0009] The invention provides a method for identifying electronic tags by an RFID system and an RFID system, which can accurately estimate the number of electronic tags, effectively use frame resources and improve the efficiency of identifying electronic tags, and better solve the problem of identifying multiple electronic tags. Conflicts in Electronic Tags

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