RFID INTERROGATOR DEVICE
First Claim
1. An RFID interrogator device, transmitting a command to an RFID tag and receiving response data from the RFID tag after a predetermined lapse of time, comprising:
- a time window setting section configured to set a time window at timing of receiving preamble data added to a head of response data transmitted from the RFID tag in response to the command;
an identifying data storage section configured to store preamble identifying data; and
decision means for comparing data received within the time window, with preamble identifying data stored in the identifying data storage section, thereby determining whether the data received is identical to the preamble data transmitted from the RFID tag.
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Accused Products
Abstract
An RFID interrogator device has a transmission section for transmitting a command to an RFID tag and a reception section for receiving an RF signal from the RFID tag and is configured to perform backscatter radio communication with the RFID tag. The RFID interrogator device comprises a time window setting section configured to set a time window at timing of receiving preamble data added to a head of response data transmitted from the RFID tag in response to the command, and an identifying data storage section storing preamble identifying data. The RFID interrogator device compares the data received within the time window, with preamble identifying data stored in the identifying data storage section, thereby determining whether the data received is identical to the preamble data transmitted from the RFID tag.
25 Citations
18 Claims
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1. An RFID interrogator device, transmitting a command to an RFID tag and receiving response data from the RFID tag after a predetermined lapse of time, comprising:
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a time window setting section configured to set a time window at timing of receiving preamble data added to a head of response data transmitted from the RFID tag in response to the command; an identifying data storage section configured to store preamble identifying data; and decision means for comparing data received within the time window, with preamble identifying data stored in the identifying data storage section, thereby determining whether the data received is identical to the preamble data transmitted from the RFID tag. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A radio communication method of an RFID interrogator device, transmitting a command to an RFID tag and receiving response data from the RFID tag after a predetermined lapse of time, comprising:
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setting a time window at timing of receiving preamble data added to a head of response data transmitted from the RFID tag in response to the command; setting the prescribed lower bits of preamble data as preamble identifying data; and comparing data received within the time window with the preamble identifying data, thereby determining whether the received data is identical to the preamble data transmitted from the RFID tag. - View Dependent Claims (15, 16, 17, 18)
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Specification