RF TAG READER AND WRITER
First Claim
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1. An RF tag reader and writer comprising:
- a communication unit configured to communicate with an RF tag as a target from which information is obtained and obtains the information held in the RF tag; and
a communication stability determination unit configured to determine that stable communication with a specific RF tag is being established when the same information is obtained over a predetermined plural number of times from the RF tag communicating with the communication unit.
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Abstract
The present invention relates to an RF tag reader and writer including: a communication unit which communicates with an RF tag as a target from which information is obtained and obtains the information held in the RF tag; and a communication stability determination unit which determines that stable communication with a specific RF tag is being established when the same information is obtained over a predetermined plural number of times from the RF tag communicating with the communication unit.
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Citations
20 Claims
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1. An RF tag reader and writer comprising:
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a communication unit configured to communicate with an RF tag as a target from which information is obtained and obtains the information held in the RF tag; and a communication stability determination unit configured to determine that stable communication with a specific RF tag is being established when the same information is obtained over a predetermined plural number of times from the RF tag communicating with the communication unit. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 18, 19, 20)
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9. An RF tag reader and writer comprising:
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a communication unit configured to include a response requesting unit configured to send a response request command to the RF tag, a response obtaining unit configured to obtain a response sent from the RF tag in accordance with the obtaining of the response request command, a tag information requesting unit configured to send a tag information request command, which requests the sending of the information held in the RF tag, to the RF tag which sent the response to be obtained, when the response requesting unit obtains the response within a predetermined time after the response requesting unit sent the response request command, and a tag information obtaining unit configured to obtain the information, which is sent from the RF tag which sent the response in accordance with the obtaining of the tag information request command, and which is held in the RF tag, the communication unit communicating with the RF tag in a slot ALOHA method; a communication stability determination unit configured to determine that stable communication with a specific RF tag is being established when the tag information obtaining unit obtains information held in the RF tag from the RF tag which sent the response; a tag writing unit configured to perform data writing on the RF tag, from which the response and the information held therein were obtained, when the communication stability determination unit determines that stable communication with a specific RF tag is being established; and an output adjusting unit configured to change the transmission output of the radio waves for the data writing by the tag writing unit with respect to the RF tag to be greater than the transmission output of the radio waves for the response request command by the response requesting unit with respect to the RF tag.
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10. An RF tag communication stability determination method comprising:
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communicating with an RF tag as a target from which information is obtained and thereby obtaining the information held in the RF tag; and determining that stable communication with a specific RF tag is being established when identical information is obtained from the RF tag, with which the communication was made, over a predetermined plural number of times. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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Specification