Wi-Fi Wi-Fi Wi-Fi METHOD OF MULTI TAG ACCESS IN WI-FI BACKSCATTER WI-FI BACKSCATTER READER AND WI-FI BACKSCATTER SYSTEM USING IT

摘要

The present invention provides a method for accessing a multi tag in a Wi-Fi backscatter system. In the Wi-Fi backscatter system provided by the present invention, the multi-tag access method is a multi-access method in which a reader accesses a plurality of tags, wherein the unique ID assigned to the tag is transmitted to a plurality of stages in a predetermined bit unit. Distinguishing; Sending, by the reader, a plurality of group call signals to the plurality of tags, the plurality of group call signals including a partial ID corresponding to at least one of the plurality of stages; And receiving, by the reader, a response signal including the ID of the tag from a tag including the partial ID among the plurality of tags.