Communication apparatus and computer program product
First Claim
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1. A communication apparatus which is configured to read an RFID tag, the communication apparatus comprising:
- a communication section which performs communication in an ASK modulation format with an RFID tag; and
a control section which (i) when a user operates an operation section provided in a main body of the apparatus to cause the communication section to perform polling to search for the RFID tag, controls the communication section to search for the RFID tag in a state in which a modulation degree of the ASK modulation of the communication section is set to a first modulation degree larger than a second modulation degree set in advance and an electric current flowing to the communication section is made to be a first electric current amount smaller than a second electric current amount set in advance, and (ii) when the RFID tag is found by receiving response information from the RFID tag through the communication section, controls the communication section to communicate with the RFID tag in a state in which the modulation degree is set to the second modulation degree smaller than the first modulation degree and the electric current flowing to the communication section is made to be the second electric current amount larger than the first electric current amount,wherein the control section (i) controls the communication section to search for the RFID tag in a state in which the modulation degree is set to the first modulation degree and the electric current flowing to the communication section is made to be the first electric current amount when polling to search for the RFID tag is performed by the communication section, and (ii) controls the communication section to search for the RFID tag in a state in which the modulation degree is set to the second modulation degree and the electric current flowing to the communication section is made to be the second electric current, when the RFID tag cannot be found after the polling is performed a predetermined number of times.
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Abstract
Disclosed is a communication apparatus comprising: a communication section which performs communication in an ASK modulation format with an RFID tag; and a control section which sets a modulation degree of the ASK modulation of the communication section to a large degree when polling of the RFID tag is performed by the communication section and which sets the modulation degree to a small degree when response information is received from the RFID tag through the communication section.
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Citations
12 Claims
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1. A communication apparatus which is configured to read an RFID tag, the communication apparatus comprising:
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a communication section which performs communication in an ASK modulation format with an RFID tag; and a control section which (i) when a user operates an operation section provided in a main body of the apparatus to cause the communication section to perform polling to search for the RFID tag, controls the communication section to search for the RFID tag in a state in which a modulation degree of the ASK modulation of the communication section is set to a first modulation degree larger than a second modulation degree set in advance and an electric current flowing to the communication section is made to be a first electric current amount smaller than a second electric current amount set in advance, and (ii) when the RFID tag is found by receiving response information from the RFID tag through the communication section, controls the communication section to communicate with the RFID tag in a state in which the modulation degree is set to the second modulation degree smaller than the first modulation degree and the electric current flowing to the communication section is made to be the second electric current amount larger than the first electric current amount, wherein the control section (i) controls the communication section to search for the RFID tag in a state in which the modulation degree is set to the first modulation degree and the electric current flowing to the communication section is made to be the first electric current amount when polling to search for the RFID tag is performed by the communication section, and (ii) controls the communication section to search for the RFID tag in a state in which the modulation degree is set to the second modulation degree and the electric current flowing to the communication section is made to be the second electric current, when the RFID tag cannot be found after the polling is performed a predetermined number of times. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A non-transitory computer readable storage medium having stored thereon a computer program that is executable by a computer used in a communication apparatus which is configured to read an RFID tag, the program being executable by the computer to control the computer to function as:
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a communication section which performs communication in an ASK modulation format with an RFID tag; and a control section which (i) when a user operates an operation section provided in a main body of the apparatus to cause the communication section to perform polling to search for the RFID tag, controls the communication section to search for the RFID tag in a state in which a modulation degree of the ASK modulation of the communication section is set to a first modulation degree larger than a second modulation degree set in advance and an electric current flowing to the communication section is made to a first electric current amount smaller than a second electric current amount set in advance, and which (ii) when the RFID tag is found by receiving response information from the RFID tag through the communication section, controls the communication section to communicate with the RFID tag in a state in which the modulation degree is set to the second modulation degree smaller than the first modulation degree and an electric current flowing to the communication section is made to the second electric current amount larger than the first electric current amount, wherein the control section (i) controls the communication section to search for the RFID tag in a state in which the modulation degree is set to the first modulation degree and the electric current flowing to the communication section is made to be the first electric current amount when polling to search for the RFID tag is performed by the communication section, and (ii) controls the communication section to search for the RFID tag in a state in which the modulation degree is set to the second modulation degree and the electric current flowing to the communication section is made to be the second electric current, when the RFID tag cannot be found after the polling is performed a predetermined number of times.
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11. A communication apparatus which is configured to read an RFID tag, the communication apparatus comprising:
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a communication section which performs communication in an ASK modulation format with an RFID tag; a control section which (i) when a user operates an operation section provided in a main body of the apparatus to cause the communication section to perform polling to search for the RFID tag, controls the communication section to search for the RFID tag in a state in which a modulation degree of the ASK modulation of the communication section is set to a first modulation degree larger than a second modulation degree set in advance and an electric current flowing to the communication section is made to be a first electric current amount smaller than a second electric current amount set in advance, and (ii) when the RFID tag is found by receiving response information from the RFID tag through the communication section, controls the communication section to communicate with the RFID tag in a state in which the modulation degree is set to the second modulation degree smaller than the first modulation degree and the electric current flowing to the communication section is made to be the second electric current amount larger than the first electric current amount; a power source section which includes a cell; and a monitoring section which obtains a cell remaining amount of the power source section, wherein the modulation degree or a timing to set the modulation degree smaller during the polling is changed according to the cell remaining amount obtained from the monitoring section.
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12. A non-transitory computer readable storage medium having stored thereon a computer program that is executable by a computer used in a communication apparatus which is configured to read an RFID tag and which includes a power source section which includes a cell, and a monitoring section which obtains a cell remaining amount of the power source section, the program being executable by the computer to control the computer to function as:
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a communication section which performs communication in an ASK modulation format with an RFID tag; and a control section which (i) when a user operates an operation section provided in a main body of the apparatus to cause the communication section to perform polling to search for the RFID tag, controls the communication section to search for the RFID tag in a state in which a modulation degree of the ASK modulation of the communication section is set to a first modulation degree larger than a second modulation degree set in advance and an electric current flowing to the communication section is made to a first electric current amount smaller than a second electric current amount set in advance, and which (ii) when the RFID tag is found by receiving response information from the RFID tag through the communication section, controls the communication section to communicate with the RFID tag in a state in which the modulation degree is set to the second modulation degree smaller than the first modulation degree and an electric current flowing to the communication section is made to the second electric current amount larger than the first electric current amount; wherein the modulation degree or a timing to set the modulation degree smaller during the polling is changed according to the cell remaining amount obtained from the monitoring section.
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Specification