READER/WRITER, RADIO TAG, TRANSMISSION/RECEPTION SYSTEM AND TRANSMISSION/RECEPTION METHOD
First Claim
Patent Images
1. A reader/writer for transmitting/receiving a signal to/from a radio tag, the reader/writer comprising:
- a transmission unit configured to transmit, to an active-type radio tag to perform detection of a signal at a constant time interval by supplying power to a reception unit from a power supply unit for a time period, a signal including an instruction to temporarily extend the time period.
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Accused Products
Abstract
A transmission unit of a reader/writer transmits, to an active-type radio tag to perform detection of a signal at a constant time interval by supplying power to a reception unit from a power supply unit for a time period, a signal including an instruction to temporarily extend the time period.
13 Citations
22 Claims
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1. A reader/writer for transmitting/receiving a signal to/from a radio tag, the reader/writer comprising:
a transmission unit configured to transmit, to an active-type radio tag to perform detection of a signal at a constant time interval by supplying power to a reception unit from a power supply unit for a time period, a signal including an instruction to temporarily extend the time period. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A radio tag for transmitting/receiving a signal to/from a reader/writer, the radio tag comprising:
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a power supply unit; a reception unit configured to receive power supplied from the power supply unit for a time period and to detect a signal transmitted from the reader/writer at a constant time interval; and an extension unit configured to temporarily extend the time period, when the reception unit receives a signal including an instruction to temporarily extend the time period. - View Dependent Claims (11, 12, 13, 14, 15, 16, 17)
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18. A recording medium storing a program used in a computer that controls a reader/writer for receiving/transmitting a signal to/from a radio tag, the program making the computer to perform:
transmitting to an active-type radio tag to perform detection of a signal at a constant time interval by supplying power to a reception unit from a power supply unit for a time period, a signal including an instruction to temporarily extend the time period.
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19. A recording medium storing a program used in a computer that controls a radio tag comprising a reception unit to receive power supplied from a power supply unit for a time period and to detect a signal transmitted from a reader/writer at a constant time interval, the program making the computer to perform:
temporarily extending the time period when the reception unit receives a signal including an instruction to temporarily extend the time period.
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20. A transmission/reception system for transmitting/receiving a signal between a radio tag and a reader/writer, wherein
the radio tag comprises: -
a power supply unit; and a reception unit configured to receive power supplied from the power supply unit for a time period and to detect a signal transmitted from the reader/writer at a constant time interval, and the reader/writer comprises a transmission unit configured to transmit a signal including an instruction to temporarily extend the time period, and the radio tag comprises an extension unit configured to temporarily extend the time period when the reception unit receives the signal including the instruction to temporarily extend the time period transmitted from the transmission unit.
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21. A transmission/reception method for transmitting/receiving a signal between a radio tag and a reader/writer, the method comprising:
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supplying power from a power supply unit of a radio tag to a reception unit for a time period and performing detection of a signal transmitted from the reader/writer at a constant time interval; transmitting a signal including an instruction to temporarily extend the time period from the reader/writer to the radio tag; and temporarily extending the time period by the radio tag when the reception unit of the radio tag receives the signal including the instruction to temporarily extend the time period.
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22. A reader/writer for transmitting/receiving a signal to/from a plurality of radio tags, the reader/writer comprising:
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a first transmission unit configured to transmit, to a plurality of active-type radio tags to perform detection of a signal at a constant time interval by supplying power from a power supply unit to a reception unit for a time period, a signal including an instruction to temporarily extend the time period; a reception unit configured to receive a response signal to the signal transmitted by the first transmission unit from the plurality of radio tags; a time transmission unit configured to transmit, when the response signal is received by the reception unit, a signal including time information output from a clock unit and an instruction to set a time according to the time information simultaneously to the plurality of radio tags; and a second transmission unit configured to transmit, to a radio rag to which the signal is transmitted by the time transmission unit, a signal including an instruction to extend the time period and an acquisition request instruction for dividing and transmitting data stored in the radio tag in multiple times.
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Specification