Communication method based on radio frequency identification system, apparatus and system thereof

Abstract

A radio frequency identification system based communication method, apparatus and system are disclosed, which are used for implementing bi-directional communication between an electronic tag and a reader in the radio frequency identification system, saving battery power consumption in an active electronic tag, and guaranteeing communication stability between the electronic tag and the reader. Wherein, the method includes: receiving data frames sent by the reader in the current checking period, analyzing the data frames and extracting frame sequence numbers from preset fields, calculating waiting time required for the current checking period to enter into a channel idle state based on the extracted frame sequence numbers, selecting one timeslot from timeslots included in the current checking period when determining the reader is in the channel idle state, and transmitting messages to the reader based on the selected timeslot.

Description

technical field [0001] The present invention relates to the field of radio frequency identification, in particular to a communication method, device and system based on a radio frequency identification system. Background technique [0002] At present, application systems centered on radio frequency identification (Radio Frequency Identification, RFID) technology are widely used in the field of intelligent transportation. RFID technology uses radio frequency signals based on spatial coupling transmission characteristics to realize automatic identification of objects in a non-contact manner. An RFID system generally includes two parts: a reader and an electronic tag, and the reader is a device for reading the information of the electronic tag. The reader sends and receives data in units of counting cycle, that is, one counting cycle includes two stages of sending data and receiving data. According to different application scenarios, the number of sending data frames and the n...

AI Technical Summary

Problems solved by technology

This method is not suitable for active electronic tags. First, the detection of RSSI requires the radio frequency circuit of the electronic tag to be in the radio frequency receiving state all the time, which consumes a lot of energy for the electronic tag battery; secondly, the detection of RSSI is easily affected by the external environment. Interference will affect the accuracy of the detection results and reduce the stability of RFID system communication

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