Enhanced identification system

摘要

A method and an identification system used for communicating between a reader and a plurality of transponders are disclosed. The reader has a transmitter for transmitting a signal and each transponder includes a receiver for receiving the reader signal and a transmitter for generating a transponder signal. When the reader recognises a transponder signal from one of the transponders it immediately issues a mute instruction, muting all other active transponders and passing control to the said transponder, without the need for a specifically timed acknowledgement to the said controlling transponder. The reader may issue a single disable/wakeup instruction which disables the controlling transponder returning control to the reader and reactivated all muted (but not disabled) transponders.

主权项

1. A system comprising:
a reader; and a plurality of transponders; wherein the reader is configured to transmit a powering signal to the plurality of transponders, wherein each of the transponders is configured to transmit identifying data subsequent to receiving the power signal, wherein each of the transponders is configured to transmit the identifying data in response to the powering signal without a need for an instruction in the powering signal, wherein the reader is further configured to transmit a mute instruction muting all transponders except for a controlling transponder, wherein a coded instruction is included in the mute instruction, wherein the controlling transponder is configured to perform an operation in accordance with the coded instruction, and wherein the mute instruction comprises a modulation of the powering signal while the powering signal maintains a pre-selected frequency.