Conditional RFID

摘要

A RFID tag includes logic to compare information in a received signal with conditional response criteria, and to respond to the received signal with an RFID only if the information satisfies the conditional response criteria.

主权项

1. A device comprising:
an RFID tag, the RFID tag comprising an RF transceiver configured to receive signals from an RFID reader device; logic to operate the RF transceiver to respond to a received signal from the RFID reader device with a unique radio frequency id (RFID) in a signal directed to the RFID reader device; logic to compare a location indication in the received signal from the RFID reader device with a location indication stored by the RFID tag, and to respond to the received signal from the RFID reader device with the RFID in a response signal directed specifically to the RFID reader device only if the location indication stored by the RFID tag is co-extensive with the location indication in the received signal from the RFID reader device; and logic to compare an operational state specified in the received signal with an operational state of the RFID tag, and to respond to the received signal from the RFID reader device with the RFID only if the operational state of the RFID tag matches the operational state specified in the received signal.