Radio frequency identification (RFID) electronic tag random frequency hopping method

Abstract

The invention discloses a radio frequency identification (RFID) electronic tag random frequency hopping method on the basis of a radio frequency identification system and an implementation method of the radio frequency identification system for enabling electronic tags to randomly select channels, wherein the radio frequency identification system comprises a host computer, a low-frequency exciter, the electronic tags and a controller. The low-frequency exciter awakes the electronic tags entering an excitation area of the low-frequency exciter, and transmits a frequency hopping table to the electronic tags; and the electronic tags which receive the frequency hopping table randomly select a communication channel to establish a communication link with a corresponding controller, so that data are transmitted to the host computer through the controller, or the data from the host computer are received through the controller. According to the method, the communication channel of the electronic tags is randomly selected to avoid channel collision, and the retention time of the transmitted data on a single communication channel is short, so that the data are difficult to capture and resolve, and the safety of the data is ensured; besides, compared with a frequency multiplexing RFID system in the prior art, more electronic tags can be accommodated in the radio-frequency identification system, so that the utilization ratio and the redundancy rate of the channel are improved.

Description

technical field [0001] The invention relates to a radio frequency identification system and its communication method, in particular to a radio frequency identification system working on more than one communication channel and a method for selecting and establishing a communication channel. Background technique [0002] The radio frequency identification system based on Radio Frequency Identification technology is referred to as the RFID system, which uses radio technology to establish a wireless communication link between the reader and the electronic tag, so as to realize information query, identity confirmation, condition retrieval and other identification functions. According to different implementation methods, the RFID systems can be divided into two categories: active RFID systems and passive RFID systems. There is no battery on the electronic tag of the passive RFID system, and all the power required for its work is obtained by converting the received electromagne...

AI Technical Summary

Problems solved by technology

However, due to the fixed communication channel and weak data security, it is not competent in areas with high security requirements; and in order to maintain smooth communication, it is necessary to ensure that all allocated communication channels are maintained normally, even if the electronic tag does not need to be connected with the control It is also necessary to maintain the status of the communication channel assigned to the electronic tag when communicating with the device, resulting in low channel redundancy and low channel utilization

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