System and method for allowing multiple RFID reader devices to read RFID tags without collision
First Claim
1. A method of operating an RFID (Radio Frequency Identification) system including multiple RFID readers, comprising:
- grouping RFID readers spaced apart by more than a spacing distance to avoid collision between RFID readers into a single group to determine at least one group;
classifying RFID readers included in each group into at least one sub-group based on a read time of each RFID reader; and
driving the RFID readers such that RFID readers belonging to at least two different sub-groups that do not collide with each other simultaneously operate;
wherein driving the RFID readers comprises;
allowing RFID readers belonging to a first group to start to operate;
detecting a first sub-group that finishes the operation thereof among sub-groups included in the first group;
determining a second sub-group which belongs to a second group different from the first group and includes RFID readers that collide with RFID readers belonging to the first sub-group; and
allowing the RFID readers belonging to the second sub-group to operate after the RFID readers belonging to the first sub-group finish the operations thereof.
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Accused Products
Abstract
Provided are an RFID operating system and an RFID system operating method for allowing multiple RFID readers to read tags without collision. The RFID system operating method includes the steps of grouping RFID readers spaced apart by more than a spacing distance capable of avoiding collision between RFID readers into a single group to determine at least one group, classifying RPM readers included in each group into at least one sub-group based on a read time of each RFID reader, and driving the RFID readers such that RPM readers belonging to at least two different sub-groups that do not collide with each other simultaneously operate. According to the present invention, switching is performed sub-group by sub-group to reduce the number of switching operations and sub-groups can simultaneously operate to decrease a read time.
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Citations
11 Claims
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1. A method of operating an RFID (Radio Frequency Identification) system including multiple RFID readers, comprising:
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grouping RFID readers spaced apart by more than a spacing distance to avoid collision between RFID readers into a single group to determine at least one group; classifying RFID readers included in each group into at least one sub-group based on a read time of each RFID reader; and driving the RFID readers such that RFID readers belonging to at least two different sub-groups that do not collide with each other simultaneously operate; wherein driving the RFID readers comprises; allowing RFID readers belonging to a first group to start to operate; detecting a first sub-group that finishes the operation thereof among sub-groups included in the first group; determining a second sub-group which belongs to a second group different from the first group and includes RFID readers that collide with RFID readers belonging to the first sub-group; and allowing the RFID readers belonging to the second sub-group to operate after the RFID readers belonging to the first sub-group finish the operations thereof. - View Dependent Claims (2, 3, 4, 5)
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6. A computer readable recording medium storing a program for executing a method of operating an RFID (Radio Frequency Identification) system including multiple RFID readers on a computer, comprising:
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grouping RFID readers spaced apart by more than a spacing distance to avoid collision between RFID readers into a single group to determine at least one group; classifying RFID readers included in each group into at least one sub-group based on a read time of each RFID reader; and driving the RFID readers such that RFID readers belonging to at least two different sub-groups that do not collide with each other simultaneously operate; wherein driving the RFID readers comprises; allowing RFID readers belonging to a first group to start to operate; detecting a first sub-group that finishes the operation thereof among sub-groups included in the first group; determining a second sub-group which belongs to a second group different from the first group and includes RFID readers that collide with RFID readers belonging to the first sub-group; and allowing the RFID readers belonging to the second sub-group to operate after the RFID readers belonging to the first sub-group finish the operations thereof.
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7. A system of operating an RFID system including multiple RFID readers, comprising:
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a grouping unit grouping RFID readers spaced apart by more than a spacing distance to avoid collision between RFID readers into a single group to determine at least one group; a classification unit classifying RFID readers included in each group into at least one sub-group based on a read time of each RFID reader; a driving unit driving the RFID readers such that RFID readers belonging to at least two different sub-groups that do not collide with each other simultaneously operate; and an identification unit detecting a first sub-group that finishes the operation thereof among sub-groups included in a first group and providing the detection result to the driving unit, wherein the driving unit determines a second sub-group which belongs to a second group different from the first group and includes RFID readers that collide with RFID readers belonging to the first sub-group and allows the RFID readers belonging to the second sub-group to operate after the RFID readers belonging to the first sub-group finish the operations thereof. - View Dependent Claims (8, 9, 10, 11)
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Specification