Communication method based on radio frequency identification system

Abstract

The invention discloses a communication method, a device and a system based on radio frequency identification system. The communication method, device and system are used for achieving both-way communication between an electronic tag and a reader in the radio frequency identification system, saving battery energy consumption of an active electronic tag, and guaranteeing communication stability between the electronic tag and the reader. The method includes steps of receiving data frames sent by the reader during a current inventory cycle, analyzing the data frames and extracting a frame number from a pre-set field, calculating a required waiting time of the current inventory cycle entering a channel idle state based on the extracted frame number, choosing a slot time from slot times contained in the current inventory cycle while determining the reader is in the channel idle state, and sending a message to the reader based on the chosen slot time. The invention discloses a communication device based on radio frequency identification system and a communication system based on radio frequency identification at the same time.

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 (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. The RFID system generally includes two parts: a reader and an electronic tag, where the reader is a device that reads the information of the electronic tag. The reader uses the inventory cycle as the unit to send and receive data, that is, an inventory cycle includes two stages: sending data and receiving data. According to different application scenarios, the number of sent data frames and the number of time slots included ...

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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