METHOD AND APPARATUS FOR COMMUNICATION BETWEEN READERS HAVING DUAL SENSITIVITY MODES
First Claim
1. A method for communication between a tag and a reader using dual sensitivity modes for avoiding conflict between the reader and the tag, comprising:
- initializing the reader to a normal sensitivity mode;
temporarily selecting a frequency channel by the reader;
checking whether or not other readers occupy the selected frequency channel;
repeatedly selecting another frequency channel if the other readers occupy the selected frequency channel;
switching to a reduced sensitivity mode if the other readers do not occupy the selected frequency channel; and
communicating by the reader with the tag in the reduced sensitivity mode.
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Accused Products
Abstract
Provided is a method for communication with between readers having dual sensitivity modes for avoiding conflict between readers arising from interference each other when simultaneously used in a limited space. The method for communication between a tag and a reader using dual sensitivity modes for avoiding conflict between the reader and the tag includes: initializing the reader to a normal sensitivity mode; temporarily selecting a frequency channel by the reader; checking whether or not a different reader uses the selected frequency channel; repeatedly selecting another frequency channel if the other readers occupy the selected frequency channel; switching to a reduced sensitivity mode if the other readers do not occupy the selected frequency channel; and communicating with the tag by the reader in the reduced sensitivity mode.
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Citations
6 Claims
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1. A method for communication between a tag and a reader using dual sensitivity modes for avoiding conflict between the reader and the tag, comprising:
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initializing the reader to a normal sensitivity mode; temporarily selecting a frequency channel by the reader; checking whether or not other readers occupy the selected frequency channel; repeatedly selecting another frequency channel if the other readers occupy the selected frequency channel; switching to a reduced sensitivity mode if the other readers do not occupy the selected frequency channel; and communicating by the reader with the tag in the reduced sensitivity mode. - View Dependent Claims (2, 3, 4)
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5. A reader apparatus having dual sensitivity modes for avoiding conflict among readers, comprising:
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a frequency channel selector which allows the reader to temporarily select a frequency channel; a channel scanner which checks whether or not other readers use the selected frequency channel; a sensitivity mode controller which sets the reader to a normal sensitivity mode at an initial mode and switches to a reduced sensitivity mode as a result of the checking of the channel scanner if the other readers do not occupy the selected frequency channel; and a communication unit which allows the reader to communicate with the tag in the reduced sensitivity mode. - View Dependent Claims (6)
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Specification