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发明公开
CN106503600A 一种基于时序的RFID主动防冲突方法 有权

一种基于时序的RFID主动防冲突方法
摘要：
本发明提供一种基于时序的RFID主动防冲突方法，该方法采用RFID卡自动发送方式，RFID读写器在成功接收到一个RFID卡的响应命令ATQC后，可以选择发送WTRD命令，使所有卡片进入Ready状态，停止其他卡片的发送，然后选中刚才接到响应命令ATQC代表的那张RFID卡进行操作，也可以不发送WTRD命令，继续接收卡片数据，完成对射频场内所有卡的寻卡；在RFID读写器读多张RFID卡时RFID读写器只存储有效的ATQC，而且RFID读写器在发送读卡REQC命令后，在接收到有效的相应命令ATQC前都不需要再发送命令了，节约了发送命令的时间，同时也节约了发送和接收的数据量节约了存储空间。
摘要（英）：

The invention provides a time sequence based RFID active anti-collision method. The method employs an RFID card self-transmitting mode. When an RFID reader and writer successfully receives a responding instruction ATQC of an RFID card, a WTRD instruction can be chosen and sent to enable all cards to enter a Ready state. Then, the transmission to other cards is aborted and the RFID card is chosen and operated which just received the corresponding instruction ATQC. In the method, it is also possible not to send any WTRD instruction, and continue to receive card data so as to complete the search of all cards in a radio frequency field. When the RFID reader and writer reads a plurality of RFID cards, the RFID reader and writer only saves the valid ATQC, and after the RFID reader and writer sends the REQC instruction, it does not have to send more instructions after it receives the valid corresponding ATQC instruction. Therefore, the time to send instructions can be saved; the received and sent data amount is saved; and the saving space is also saved.

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