Radio frequency recognition reading method and answering method

Abstract

The invention relates to a radio frequency identification reading method and responding method, especially suitable for advancing the anticollision performance of the radio frequency identification technique, wherein the reading method includes: transmitting the inquiry order including the orthotropic cycle code; generating a group of orthotropic de-spread code to de-spread the received answeringsignal to obtain the answering mark; transmitting the affirming order; transmitting the re-inquiry or inquiry adjusting order and going on receiving the answering signal. The answering method includes: receiving the inquiry order including the orthotropic cycle code; de-spreading and modulating the answering marks to generate the answering signals according to the orthotropic cycle code to generate the orthotropic spread spectrum code; transmitting the answering signal; waiting for receiving the acknowledge order to enter the acknowledge state or receiving the inquiry adjustment order to execute the next identifying step. The invention adopts the method combining the code division and time division, recognizes a plurality of answering signals at the same time slot, and effectively preventsthe collision interference, reduces the recognizing answer time consumption, realizes the safe, reliable and high efficient radio frequency identification.

Description

technical field [0001] The invention relates to a radio frequency identification reading method and a response method, and is especially suitable for a radio frequency identification reading method and a response method capable of improving the anti-collision performance of the radio frequency identification technology. Background technique [0002] Radio Frequency Identification (Radio Frequency Identification, hereinafter referred to as RFID) technology is a technology that uses radio backscatter transmission to realize non-contact automatic identification (Auto-ID) of objects. In recent years, it has been widely used in many business fields, such as production process management, supply chain management, logistics and transportation, distribution, retail, transportation control and other systems. Under this development trend, the goal of RFID technology is to expand the amount of data provided by transponders and provide information on individuals, animals, objects and go...

AI Technical Summary

Problems solved by technology

When the number of transponders to be read is large, the response time of these technologies is relatively long and the real-time performance is poor

For the case where the number of items is large and the reading time is limited, the RFID anti-collision method simply using tree search or collision random backoff technology cannot meet the requirements.

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