RFID system and RFID tag
First Claim
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1. An RFID system provided with a plurality of processes, the system comprising:
- an antenna unit to detect a electro-magnetic wave transmitted by an RFID tag and read and write to a storage area of the RFID tag, the storage area including a first area to store ID information and a second area to store process identification information and command information corresponding to the process identification information; and
a control unit including,a determination unit to determine whether or not the process identification information coincides with a number of its own process;
an extraction unit to extract the command information corresponding to the process identification information from the second area when the determination unit determines that the process identification information coincides with the number of its own process;
an execution unit to execute a process corresponding to the command information extracted by the extraction unit; and
a writing unit to write a return value obtained by executing the process corresponding to the command information into the storage area of the RFID tag,wherein the writing unit writes the return value obtained by executing a process corresponding to a first command information extracted by the extraction unit in a first process of the plurality of processes into the storage area of the RFID tag, andthe return value is read from the storage area of the RFID tag by the antenna unit in a second process after the first process and is used as a parameter for a process corresponding to second command information extracted by the extraction unit in the second process.
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Abstract
In an RFID system comprising a detection unit for detecting an RFID tag and a control unit for exercising the control concerning the RFID tag, a determination unit determines whether to access a second area of an RFID tag comprising storage area, comprising of a first area for storing ID information and the second area for storing command information. An extraction unit extracts command information from the second area when it is determined to access the second area. An execution unit performs a process corresponding to the command information extracted by the extraction unit.
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Citations
9 Claims
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1. An RFID system provided with a plurality of processes, the system comprising:
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an antenna unit to detect a electro-magnetic wave transmitted by an RFID tag and read and write to a storage area of the RFID tag, the storage area including a first area to store ID information and a second area to store process identification information and command information corresponding to the process identification information; and a control unit including, a determination unit to determine whether or not the process identification information coincides with a number of its own process; an extraction unit to extract the command information corresponding to the process identification information from the second area when the determination unit determines that the process identification information coincides with the number of its own process; an execution unit to execute a process corresponding to the command information extracted by the extraction unit; and a writing unit to write a return value obtained by executing the process corresponding to the command information into the storage area of the RFID tag, wherein the writing unit writes the return value obtained by executing a process corresponding to a first command information extracted by the extraction unit in a first process of the plurality of processes into the storage area of the RFID tag, and the return value is read from the storage area of the RFID tag by the antenna unit in a second process after the first process and is used as a parameter for a process corresponding to second command information extracted by the extraction unit in the second process. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A control method in an RFID system provided with a plurality of processes, the method comprising
detecting an RFID tag, the RFID tag including a storage area, the storage area including a first area to store ID information and a second area to store process identification information and command information corresponding to the process identification information; -
determining whether or not the process identification information coincides with a number of its own process; extracting command information corresponding to the process identification information from the second area when the determining determines that the process identification information coincides with the number of its own process; executing a process corresponding to the command information extracted by the extracting; writing a return value obtained by the executing the process corresponding to the command information into the storage area of the RFID tag, wherein the writing writes the return value obtained by executing a process corresponding to a first command information extracted by the extraction unit in a first process of the plurality of processes into the storage area of the RFID tag; and reading, from the storage area in a second process after the first process, the return value to be used as a parameter for a process corresponding to second command information extracted by the extraction unit in the second process.
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9. An RFID tag used in an RFID system provided with a plurality of processes, the RFID tag comprising
a storage area including a first area to store ID information and a second area to store process identification information and command information corresponding to the process identification information, wherein the RFID tag transmit a electro-magnetic wave which is detected by an antenna unit included in the RFID system, the antenna unit reading and writing the storage area of the RFID tag; - wherein
the process identification information is used to determine whether or not the process identification information coincides with a number of its own process by a determination unit included in the RFID system, wherein a process corresponding to the command information is executed by an execution unit included in the RFID system when the determination indicates that the process identification information coincides with the number of its own process, and wherein a return value obtained by executing a process corresponding to a first command information in a first process of the plurality of processes, the return value is written into the storage area of the RFID tag by a writing unit included in the RFID system, and the return value is read from the storage area by the antenna unit in a second process after the first process and is used as a parameter for a process corresponding to second command information in the second process.
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Specification