Near field radio frequency communication system
First Claim
1. A near field radio frequency communication system comprising:
- a master RFID/ubiquitous sensor network (USN) device comprising a plurality of antennas sequentially transmitting an energy signal and dividing a coverage area of the master RFID/USN device into a plurality of areas respectively corresponding to the plurality of antennas; and
a slave RFID/USN device comprising a voltage oscillation circuit for generating a first power using the transmitted energy signal, and a controller for detecting a power level of the first power for the energy signal and for transmitting information created based on the power level to the master RFID/USN device,wherein the master RFID/USN device receives the information from the slave RFID/USD device through one of the plurality of antennas, creates a first position information representing one of the divided areas corresponding to the one of the plurality of antennas, creates a second position information representing whether the slave RFID/USN device is positioned in the one of the divided areas and determined by the information,wherein a position of the slave RFID/USN device is determined by tag position information that is a combination of the first position information, the second position information, and tag coordinate information that is matched with reader coordinate information that is a coordinate information of the master RFID/USN device,wherein the information comprises a tag identification information and a tag information, or a waiting state information, and wherein the slave RFID/USN device operates in a wake-up mode by driving a power supply to transmit the tag identification information and the tag information if the power level of the first power exceeds a reference value, and operates in a sleep mode to transmit the waiting state information if the power level of the first power is less than or equal to the reference value, andwherein the master RFID/USN device creates the second position information representing that the slave RFID/USN device is positioned in the one of the divided areas when the tag identification information and the tag information are received, and creates the second position information representing that the slave RFID/USN device is positioned outside the one of the divided areas when the waiting state information is received.
1 Assignment
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Accused Products
Abstract
Disclosed is a near field radio frequency communication system. The near field radio frequency communication system comprising: a master RFID/USN device which comprises a plurality of antennas to sequentially shower an energy signal through the antennas; and a slave RFID/USN device which generates a first power using the energy signal, detects a power level of the first power, and transmits information created based on the power level to the master RFID/USN device, wherein the master RFID/USN device creates a first position information of the slave RFID/USN device related to a direction by determining an antenna used to communicate with the slave RFID/USN device, and a second position information of the slave RFID/USN device related to a distance using the information created based on the power level.
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Citations
12 Claims
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1. A near field radio frequency communication system comprising:
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a master RFID/ubiquitous sensor network (USN) device comprising a plurality of antennas sequentially transmitting an energy signal and dividing a coverage area of the master RFID/USN device into a plurality of areas respectively corresponding to the plurality of antennas; and a slave RFID/USN device comprising a voltage oscillation circuit for generating a first power using the transmitted energy signal, and a controller for detecting a power level of the first power for the energy signal and for transmitting information created based on the power level to the master RFID/USN device, wherein the master RFID/USN device receives the information from the slave RFID/USD device through one of the plurality of antennas, creates a first position information representing one of the divided areas corresponding to the one of the plurality of antennas, creates a second position information representing whether the slave RFID/USN device is positioned in the one of the divided areas and determined by the information, wherein a position of the slave RFID/USN device is determined by tag position information that is a combination of the first position information, the second position information, and tag coordinate information that is matched with reader coordinate information that is a coordinate information of the master RFID/USN device, wherein the information comprises a tag identification information and a tag information, or a waiting state information, and wherein the slave RFID/USN device operates in a wake-up mode by driving a power supply to transmit the tag identification information and the tag information if the power level of the first power exceeds a reference value, and operates in a sleep mode to transmit the waiting state information if the power level of the first power is less than or equal to the reference value, and wherein the master RFID/USN device creates the second position information representing that the slave RFID/USN device is positioned in the one of the divided areas when the tag identification information and the tag information are received, and creates the second position information representing that the slave RFID/USN device is positioned outside the one of the divided areas when the waiting state information is received. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12)
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Specification