Mobile RFID reader and control method thereof
First Claim
1. A radio frequency identification (RFID) reader mountable to a wireless communication terminal, comprising:
- a reader controller for beginning a reader operation to communicate with a tag in response to a command of a terminal controller of the wireless communication terminal;
an anti-collision state machine for controlling collision among a plurality of tags, and transferring the result of communication with the tag to the reader controller;
a reader transmitter for generating a reader command message decided at the anti-collision state machine, and coding and modulating the generated reader command message;
a reader receiver for demodulating and decoding a tag signal received from tag, and reporting a tag response state to the anti-collision state machine; and
a channel controller for selecting a channel to use to communicate with a tag in response to a command of the reader controller.
1 Assignment
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Accused Products
Abstract
Provided are a mobile RFID reader and a control method thereof. The mobile RFID reader includes: a reader controller for beginning a reader operation to communicate with a tag in response to a command of a terminal controller of the wireless communication terminal; an anti-collision state machine for controlling collision among a plurality of tags, and transferring the result of communication with the tag to the reader controller; a reader transmitter for generating a reader command message decided at the anti-collision state machine, and coding and modulating the generated reader command message; a reader receiver for demodulating and decoding a tag signal received through an antenna, and reporting a tag response state to the anti-collision state machine; and a channel controller for selecting a channel to use to communicate with a tag in response to a command of the reader controller.
36 Citations
23 Claims
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1. A radio frequency identification (RFID) reader mountable to a wireless communication terminal, comprising:
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a reader controller for beginning a reader operation to communicate with a tag in response to a command of a terminal controller of the wireless communication terminal;
an anti-collision state machine for controlling collision among a plurality of tags, and transferring the result of communication with the tag to the reader controller;
a reader transmitter for generating a reader command message decided at the anti-collision state machine, and coding and modulating the generated reader command message;
a reader receiver for demodulating and decoding a tag signal received from tag, and reporting a tag response state to the anti-collision state machine; and
a channel controller for selecting a channel to use to communicate with a tag in response to a command of the reader controller. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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13. A method of controlling a radio frequency identification (RFID) reader mounted at a wireless communication terminal, comprising the steps of:
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a) selecting one of a Listen Before Talk (LBT) frequency occupying method and a Frequency Hopping Spread Spectrum (FHSS) frequency occupying method to use for communication with a tag;
b) selecting a channel to use for communicating with a tag according to the selected frequency occupying method;
c) obtaining tag information using the selected channel; and
d) receiving the obtained tag information in a reader controller. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20, 21, 22, 23)
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Specification