Patent ID: 8994501
Filing Date: 2015-03-31
Classification: G06K

Abstract:
1. A method for selectively reading radio frequency identification device (RFID) tags by an RFID reader, the method comprising: transmitting, by the RFID reader, an interrogation signal at each of a plurality of incremental power levels beginning with a lowest power level; receiving, in response to transmitting the interrogation signal for at least one of the power levels, at least one data signal from each RFID tag within a read zone of the RFID reader, wherein each of the data signals contains stored data corresponding to an identifier of the RFID tag responding to the transmission of the interrogation signal; selectively reading the stored data contained in the data signals received from the responding RFID tags; increasing power level of the transmitted interrogation signal, to no more than a highest power level, only if: returning to the receiving step if a highest power level has not been achieved.