RFID handshaking
4 Assignments
0 Petitions
Accused Products
Abstract
Methods and Apparatuses for RFID handshaking are provided. A first number is received by a reader from a tag. The first number is a random number. In response, a handshake command and a second number is transmitted to the tag by the reader. If the first number matches the second number, then handshaking is successful and tag data is received.
117 Citations
148 Claims
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1-94. -94. (canceled)
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95. A method for operating an RFID reader comprising:
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receiving a first number from a tag, the first number being a random number;
in response to the receiving, transmitting a handshake command and a second number to the tag; and
if the first number matches the second number, receiving tag identification data from the tag. - View Dependent Claims (96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115)
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116. A method for operating an RFID system comprising:
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receiving a first number from a tag, the first number being a random number;
transmitting a handshake command and a second number to the tag;
matching the first number and the second number for successful handshaking; and
after successful handshaking sending data from the tag to the reader. - View Dependent Claims (117, 118, 119, 120, 121, 122, 123, 124)
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125. A method for operating an RFID tag comprising:
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generating a random number;
transmitting the random number;
receiving a handshake command and a received number;
matching the random number with the received number; and
if the matching is successful, transmitting tag data. - View Dependent Claims (126, 127, 128, 129, 130, 131)
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132. A reader comprising:
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first and second antennas;
a transmitter coupled to the first antenna;
a receiver coupled to the second antenna, the receiver configured to receive a random number from a tag; and
a microprocessor configured for handshaking by transmitting a handshake command and the random number. - View Dependent Claims (133, 134, 135)
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136. A reader comprising:
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an antenna;
a receive/transmit switch coupled to the antenna;
a transmitter coupled to the switch;
a receiver coupled to the switch, the receiver configured to receive a random number from a tag;
a microprocessor configured for handshaking by transmitting a handshake command and the random number; and
a network interface coupled to the microprocessor through which the reader communicates with a processing system through a network. - View Dependent Claims (137, 138)
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139. 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 random bit generator to generate a random number;
a transmitter for transmitting the random number;
a receiver for receiving a handshake command and a received number; and
logic for matching the random number with the received number. - View Dependent Claims (140, 141, 142, 143, 144)
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145. An RFID system comprising:
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a reader, the reader comprising;
first and second antennas;
a transmitter coupled to the first antenna;
a receiver coupled to the second antenna, the receiver configured to receive a first number; and
a microprocessor configured for handshaking by transmitting a handshake command and a second number; and
a tag, the tag comprising;
a tag antenna, the tag antenna configured to receive RF energy to power operation of the tag; and
an integrated circuit coupled to the tag antenna, the integrated circuit comprising;
a random bit generator to generate the first number; and
a transmitter for transmitting the first number;
a receiver for receiving the handshake command and the second number; and
logic for matching the first number with the second number. - View Dependent Claims (146, 147, 148)
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Specification