WIRELESS TAG DEVICE, STORAGE MEDIUM STORING CONTROL PROGRAM FOR WIRELESS TAG DEVICE, AND CONTROL METHOD FOR WIRELESS TAG DEVICE
First Claim
1. A wireless tag device capable of communicating with an inquiry device, comprising:
- a local terminal storage unit storing local terminal identification information which can be discriminated from another wireless tag device;
a reception detection unit detecting a signal transmitted from the inquiry device or another wireless tag device;
an inquiry signal receiving unit receiving the inquiry signal detected by the reception detection unit if the inquiry signal is transmitted using a first frequency from the inquiry device;
a reply signal transmitting unit transmitting a reply signal in response to the inquiry signal using a second frequency different from the first frequency; and
a report signal transmitting unit transmitting a report signal including the local terminal identification information stored in the local terminal storage unit using a third frequency different from the second frequency if the inquiry signal transmitted from the inquiry device cannot be detected continuously in a specified time period in the reception detection unit.
1 Assignment
0 Petitions
Accused Products
Abstract
A wireless tag device can communicate with an inquiry device includes: a local terminal storage unit storing local terminal identification information which can be discriminated from another wireless tag device; a reception detection unit detecting a signal transmitted from the inquiry device or another wireless tag device; an inquiry signal receiving unit receiving the detected inquiry signal if the inquiry signal is transmitted using a first frequency from the inquiry device; a reply signal transmitting unit transmitting a reply signal in response to the inquiry signal using a second frequency different from the first frequency; and a report signal transmitting unit transmitting a report signal including the local terminal identification information stored in the local terminal storage unit using a third frequency different from the second frequency if the inquiry signal transmitted from the inquiry device cannot be detected continuously in a specified time period in the reception detection unit.
5 Citations
7 Claims
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1. A wireless tag device capable of communicating with an inquiry device, comprising:
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a local terminal storage unit storing local terminal identification information which can be discriminated from another wireless tag device; a reception detection unit detecting a signal transmitted from the inquiry device or another wireless tag device; an inquiry signal receiving unit receiving the inquiry signal detected by the reception detection unit if the inquiry signal is transmitted using a first frequency from the inquiry device; a reply signal transmitting unit transmitting a reply signal in response to the inquiry signal using a second frequency different from the first frequency; and a report signal transmitting unit transmitting a report signal including the local terminal identification information stored in the local terminal storage unit using a third frequency different from the second frequency if the inquiry signal transmitted from the inquiry device cannot be detected continuously in a specified time period in the reception detection unit. - View Dependent Claims (2, 3, 4, 5)
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6. A storage medium storing a control program used in a wireless tag device which is provided with a local terminal storage unit storing local terminal identification information which can be identified from another wireless tag device and can communicate with an inquiry device, the control program operates a wireless tag device as:
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a reception detection unit detecting a signal transmitted from the inquiry device or another wireless tag device; an inquiry signal receiving unit receiving an inquiry signal detected by the reception detection unit if the inquiry signal is transmitted using a first frequency from the inquiry device; a reply signal transmitting unit transmitting a reply signal in response to the inquiry signal using a second frequency different from the first frequency; and a report signal transmitting unit transmitting a report signal including the local terminal identification information stored in the local terminal storage unit using a third frequency different from the second frequency if the inquiry signal transmitted from the inquiry device cannot be detected continuously in a specified time period in the reception detection unit.
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7. A control method for a wireless tag device which is provided with a local terminal storage unit storing local terminal identification information which can be identified from another wireless tag device and can communicate with an inquiry device, comprising:
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detecting a signal transmitted from the inquiry device or another wireless tag device; receiving an inquiry signal detected by the reception detection unit if the detected signal is the inquiry signal which is transmitted using a first frequency from the inquiry device; transmitting a reply signal in response to the inquiry signal using a second frequency different from the first frequency; and transmitting a report signal including the local terminal identification information stored in the local terminal storage unit using a third frequency different from the second frequency if the inquiry signal transmitted from the inquiry device cannot be detected continuously in a specified time period.
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Specification