Method and system for radio frequency identification tag using reduced set communication protocol
First Claim
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1. A method of decoding a signal received from a radio frequency identification (“
- RFID”
) reader, the method comprising;
receiving a signal from the RFID reader, the signal comprising a series of pulses;
measuring a time frame between receipt of two consecutive pulses, the measured time frame indicating receipt of a bit;
calculating a total pulse duration to receive a predetermined quantity of bits, the total pulse duration representing a sum of the measured time frames for the signal;
decoding a command, the decoding being based on the calculated total pulse duration to receive the predetermined total quantity of bits; and
each individual bit in the predetermined quantity of bits remaining un-decoded during the decoding of the command.
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Abstract
A method and tag for decoding a signal received from a radio frequency identification (“RFID”) reader. A signal is received from the RFID reader in which the signal has a series of pulses. A time frame between receipt of two consecutive pulses is measured to determine whether the pulses represent zero bits or one bits. A total pulse duration is calculated in which the total pulse duration represents a sum of the measured time frames for the signal. A command is decoded. The decoding is based on the total duration of the two pulses.
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Citations
20 Claims
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1. A method of decoding a signal received from a radio frequency identification (“
- RFID”
) reader, the method comprising;receiving a signal from the RFID reader, the signal comprising a series of pulses; measuring a time frame between receipt of two consecutive pulses, the measured time frame indicating receipt of a bit; calculating a total pulse duration to receive a predetermined quantity of bits, the total pulse duration representing a sum of the measured time frames for the signal; decoding a command, the decoding being based on the calculated total pulse duration to receive the predetermined total quantity of bits; and each individual bit in the predetermined quantity of bits remaining un-decoded during the decoding of the command. - View Dependent Claims (2, 3, 4, 5, 6, 7)
- RFID”
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8. A circuit for use in a radio frequency identification (“
- RFID”
) system, the circuit comprising;a receiver, the receiver arranged to receive a signal from an RFID reader, the signal comprising a series of pulses; and a decoder, the decoder configured to; measure a time frame between receipt of two consecutive pulses, the measured time frame indicating receipt of a bit; calculate a total pulse duration to receive a predetermined quantity of bits, the total pulse duration representing a sum of the measured time frames for the series of pulses; and decode the command, the decoding being based on the calculated total pulse duration to receive the predetermined total quantity of bits; and each individual bit in the predetermined quantity of bits remaining un-decoded during the decoding of the command. - View Dependent Claims (9, 10, 11, 12, 13, 14)
- RFID”
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15. A radio frequency identification (“
- RFID”
) tag, comprising;an antenna arranged to receive a pulse width modulated (“
PWM”
) signal, the PWM signal having a series of pulses; andan integrated circuit in communication with the antenna, the integrated circuit comprising; a receiver in communication with the antenna; and a decoder, the decoder operable to; measure a time frame between receipt of two consecutive pulses, the measured time frame indicating receipt of a bit; calculate a total pulse duration, the total pulse duration representing a sum of the measured time frames for the series of pulses; and decode the command, the decoding being based on the calculated total pulse duration to receive the predetermined total quantity of bits; and each individual bit in the predetermined total quantity of bits remaining un-decoded during the decoding of the command. - View Dependent Claims (16, 17, 18, 19, 20)
- RFID”
Specification