Patent ID: 7562083

Claim:
An RFID reader configured to perform an inventorying of RFID tags, the RFID reader comprising: first and second antennas; a transmitter coupled to the first antenna; a receiver coupled to the second antenna; and a microprocessor configured to transmit to a tag a plurality of Huffman encoded commands including a first command having a first number of first bits and a second command having a second number of second bits, wherein the first number of the first bits of the first command of the plurality of encoded commands is greater than the second number of the second bits of the second command to improve bandwidth of the inventorying, wherein the first bits include third bits associated with a probability of reply by the tag, and wherein the first command is a first query command to query a subset of tags with a parameter, and the second command is a second query command to repeat querying the subset of tags with the parameter.