RFID huffman encoded commands
4 Assignments
0 Petitions
Accused Products
Abstract
Methods and Apparatuses for RFID with Huffman encoded commands are provided. Each command of a plurality of commands is Huffman encoded. A rarely used command of the plurality of commands has more command bits than another command of the plurality of commands. The plurality of commands includes QueryA, QueryB, QueryRep, ACK, and NAK.
108 Citations
134 Claims
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1-94. -94. (canceled)
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95. An RFID reader comprising:
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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, wherein a first command of the plurality of encoded commands rarely used relative to a second command has more command bits than the second command. - View Dependent Claims (96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107)
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108. An RFID tag comprising:
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an antenna, the antenna configured to receive RF energy to power operation of the tag; and
an integrated circuit coupled to the antenna, the integrated circuit comprising;
a receiver; and
a state machine configured to implement a command protocol, the command protocol including a plurality of Huffman encoded commands, wherein a rarely used command of the plurality of encoded commands has more command bits than another command of the plurality of encoded commands. - View Dependent Claims (109)
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110. An RFID tag comprising:
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an antenna, the antenna configured to receive RF energy to power operation of the tag; and
an integrated circuit coupled to the antenna, the integrated circuit comprising;
a receiver; and
logic configured to implement a command protocol, the command protocol including a plurality of Huffman encoded commands, wherein a rarely used command of the plurality of encoded commands has more command bits than another command of the plurality of encoded commands. - View Dependent Claims (111, 112, 113, 114, 115, 116)
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117. A method of operating an RFID reader, the method comprising:
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transmitting a first command of a plurality of Huffman encoded commands;
receiving a response from a tag; and
transmitting a second command of the plurality of Huffman encoded commands, the second command being rarely used relative to the first command, and the second command having more command bits than the first command. - View Dependent Claims (118, 119, 120, 121, 122, 123, 124, 125)
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- 126. A machine readable medium containing instructions which when executed on a data processing system causes the system to transmit a plurality of Huffman encoded commands, wherein a first command of the plurality of encoded commands rarely used relative to a second command has more command bits than the second command.
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132. An RFID reader comprising:
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an antenna;
a transmitter; and
a microprocessor configured to broadcast a plurality of commands with the antenna and transmitter, each command of the plurality of commands being Huffman encoded, whereby a rarely used command of the plurality of commands has more command bits than another command of the plurality of commands and command bits of any command is not a prefix for another command to comply with Huffman encoding. - View Dependent Claims (133, 134)
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Specification