Multiple read method and system for a set of tags bearing distinct ID codes

In a system for reading a dynamic set of tags via a polling device, wherein each of said tags includes a distinct binary ID code, the tags and the polling device each comprising means for signal transmitting/receiving (1, 2, 14, 15, 16, 17), means for electronic sequencing (5, 18), and means for storing (13, 22), said polling device further comprising:

• a first tag counter (19) to provide a counting of a total number of tags of the dynamic set of tags present during a read sequence;
• a first bit position counter (21) to provide a weight corresponding to a bit position of the distinct binary ID code;
• a pointer (23) pointing to a distinct binary ID code in a list of distinct binary ID codes provided in the polling device;
• and
• said tag further comprising:
• a second bit position counter (8) to provide a weight corresponding to a bit position of the distinct binary ID code;
• a sequence number counter (10) to provide an incrementation upon an occurrence of a new higher code indicating the presence of a tag of the dynamic set of tags;
• a sequence number decounter (12) to provide a decrementation during a position search sequence of the bits of the distinct binary ID code;
• a sequence number register (11) to provide storage of a sequence number of the tag of the dynamic set of tags as calculated during said read sequence;
• a second tag counter (6) to provide a counting of a total number of tags of the dynamic set of tags present during said read sequence;
• and
• a first read latch (9) to provide a tag lock upon completion of a determination of the distinct binary ID code of a tag.