RFID system, communication device and computer-readable medium
First Claim
1. A communication device configured to perform non-contact communication with an IC tag, the communication device comprising:
- in a condition in which the communication device is configured as a master communication device, a command receiver that receives a command from a host control device that provides exclusive control over reading and writing of information from or to the IC tag, the host control device communicating only with the master communication device;
a first communication processing unit that communicates with the IC tag in order to one of;
read and write the information from and to the IC tag based on the command received by the command receiver of the master communication device;
an instruction output unit that outputs a communication instruction to another communication device configured as a slave communicaetion device in case where the first communication processing unit of the master communication device fails to one of read and write the information from and to the IC tag, the slave communication device being other than the IC tag, the communication instruction instructing the slave communication device to execute communication processing with the IC tag; and
a response processing unit that generates response information to the command received from the host control device;
(i) in a case where one of reading and writing of the tag information through the first communication processing unit of the master communication device succeeds, based on a first communication result of the one of reading and writing of the tag information through the first communication processing unit of the master communication device; and
(ii) in a case where one of reading and writing of the tag information through the first communication processing unit of the master communication device fails, based on a second communication result of one of reading and writing of the tag information through the slave communication device responsive to the communication instruction output by the instruction output unit of the master communication device.
1 Assignment
0 Petitions
Accused Products
Abstract
An RFID system capable of freely installing a plurality of communication devices and designing a desirable communication area, and a communication device configured to implement the system. In the RFID system, a first communication device configured to communicate with a control device includes a command receiver configured to receive a command from the control device, a first communication processing unit configured to perform communication with an IC tag in order to read/write tag information of the IC tag based on the received command, an instruction output unit configured to output a communication instruction to another communication device in response to a first communication result obtained by the first communication processing unit, and a response processing unit configured to generate response information to the control device based on the first communication result and a second communication result obtained by a second communication device.
8 Citations
14 Claims
-
1. A communication device configured to perform non-contact communication with an IC tag, the communication device comprising:
-
in a condition in which the communication device is configured as a master communication device, a command receiver that receives a command from a host control device that provides exclusive control over reading and writing of information from or to the IC tag, the host control device communicating only with the master communication device; a first communication processing unit that communicates with the IC tag in order to one of;
read and write the information from and to the IC tag based on the command received by the command receiver of the master communication device;an instruction output unit that outputs a communication instruction to another communication device configured as a slave communicaetion device in case where the first communication processing unit of the master communication device fails to one of read and write the information from and to the IC tag, the slave communication device being other than the IC tag, the communication instruction instructing the slave communication device to execute communication processing with the IC tag; and a response processing unit that generates response information to the command received from the host control device;
(i) in a case where one of reading and writing of the tag information through the first communication processing unit of the master communication device succeeds, based on a first communication result of the one of reading and writing of the tag information through the first communication processing unit of the master communication device; and
(ii) in a case where one of reading and writing of the tag information through the first communication processing unit of the master communication device fails, based on a second communication result of one of reading and writing of the tag information through the slave communication device responsive to the communication instruction output by the instruction output unit of the master communication device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 14)
-
-
12. An RFID system comprising:
-
an IC tag; a host control device that provides exclusive control over reading and writing of information from or to the IC tag; and first and second communication devices connected to the host control device, the first and second communication devices performing non-contact communication with the IC tag, the host control device communicating only with the first communication device in a condition in which the first device is configured as a master communication device, wherein the host control device comprises a transmitter that transmits a command to the first communication device, the first communication device comprises; a command receiver that receives the command from the host control device; a first communication processing unit that communicates with the IC tag in order to one of;
read and write tag information of the IC tag based on the command received by the command receiver;an instruction output unit configured to output a communication instruction to the second communication device configured as a slave communication device to instruct the slave communication device to execute communication processing with the IC tag, in a case where the first communication processing unit fails to one of;
read and write the information from and to the IC tag; anda response processing unit that generates response information to the host control device;
(i) in a case where the one of reading and writing of the tag information through the first communication processing unit of the master communication device succeeds, based on a first communication result of the one of reading and writing of the tag information through the first communication processing unit of the master communication device; and
(ii) in a case where the one of;
reading and writing of the tag information through the first communication processing unit of the master communication device fails, based on a second communication result of one of reading and writing of the tag information through the slave communication device responsive to the communication instruction, andthe host control device further comprises a receiver that receives the response information generated by the response processing unit of the first communication device.
-
-
13. A non-transitory computer-readable medium storing computer executable instructions that when executed by a computer of a master communication device, cause the computer to perform operations for non-contact communication with an IC tag, the operations comprising:
-
receiving by the master communication device a command from a host control device that provides exclusive control over reading and writing of information from or to the IC tag, the host control device communicating only with the master communication device; communicating with the IC tag in order to one of;
read and write tag information of the IC tag based on the received command;outputting a communication instruction to a slave communication device to instruct the slave communication device to execute communicating with the IC tag, in a case where the communicating in order to one of;
read and write the information from and to the IC tag by the master communication device fails; andgenerating response information to the host control device;
(i) in a case where one of reading and writing of the tag information by the master communication device succeeds, based on a first communication result of one of reading and writing of the tag information by the master communication device; and
(ii) in a case where the one of;
reading and writing of the tag information by the master communication device fails, based on a second communication result of one of reading and writing of the tag information by the slave communication device relative to the communication instruction.
-
Specification