RFID tags indicating availability of additional data to be read
AssigneeImpinj, Inc.
InventorsChristopher J. Diorio, Megan Marie Brewster, Rene Dominic Martinez
Life of this patent
Estimating the term…
Abstract
Communications between RFID tags and RFID readers often involve the RFID reader retrieving data from a memory bank of the RFID tag by transmitting a wireless command. The RFID tag can respond to the wireless command by first accessing its memory bank to determine if at least a portion of the requested data is available and if additional data are also available in the memory bank. If additional data are also available, the RFID tag responds to the wireless command by transmitting the requested data combined with an indication of an available amount of the additional data.
Claims20
A method for a radio frequency identification (RFID) integrated circuit (IC) to wirelessly send data, the method comprising:
- receiving, from an RFID reader, a wireless command requesting first data from a memory bank of the RFID IC;
- determining whether the first data are available;
- upon determining that at least a portion of the first data is available, determining whether additional data are also available from the memory bank;
- and
- upon determining that the additional data are also available, responding to the wireless command by wirelessly sending the available first data portion combined with an indication of an available amount of the additional data, without receiving any intervening commands between sending the first data portion and the indication.
A Radio Frequency Identification (RFID) integrated circuit (IC) comprising:
- a memory configured to store data and including one or more memory banks;
- a transceiver configured to receive commands and send replies;
- and
- a processing block coupled to the memory and the transceiver and configured to:
- receive, via the transceiver, a wireless command from an RFID reader requesting first data from a memory bank of the RFID IC;
- determine whether the first data are available;
- upon determining that at least a portion of the first data is available, determine whether additional data are also available from the memory bank;
- and
- upon determining that the additional data are also available, respond to the command by wirelessly sending, visa the transceiver, the available first data portion combined with an indication of an available amount of the additional data, without receiving any intervening commands between sending the first data portion and the indication.
Dependencies are inferred from the claim text.