Mitigating adjacent RFID reader interference
First Claim
1. A radio frequency identification (RFID) automatic vehicle identification (AVI) system configured to mitigate signal interference, the system comprising:
- a plurality of RFID readers, comprising a first RFID reader and a second RFID reader;
a plurality of antennas, wherein a first antenna is connected to the first RFID reader and a second antenna is connected to the second RFID reader;
wherein prior to the first RFID reader transmitting a signal through the first antenna, the first RFID reader samples a received radio frequency (RF) signal from the first antenna, and upon determining that the received RF signal meets predetermined strength and frequency criteria, the first RFID reader inhibits transmission of the signal through the first antenna.
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Accused Products
Abstract
A radio frequency identification (RFID) automatic vehicle identification (AVI) system configured to mitigate signal interference, the system comprising a plurality of RFID readers, comprising a first RFID reader and a second RFID reader; and a plurality of antennas, wherein a first antenna is connected to the first RFID reader and a second antenna is connected to the second RFID reader. Prior to the first RFID reader transmitting a signal through the first antenna, the first RFID reader samples a received radio frequency (RF) signal from the first antenna, and if the received RF signal meets predetermined strength and frequency criteria, the first RFID reader inhibits transmission of the signal through the first antenna.
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Citations
19 Claims
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1. A radio frequency identification (RFID) automatic vehicle identification (AVI) system configured to mitigate signal interference, the system comprising:
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a plurality of RFID readers, comprising a first RFID reader and a second RFID reader; a plurality of antennas, wherein a first antenna is connected to the first RFID reader and a second antenna is connected to the second RFID reader; wherein prior to the first RFID reader transmitting a signal through the first antenna, the first RFID reader samples a received radio frequency (RF) signal from the first antenna, and upon determining that the received RF signal meets predetermined strength and frequency criteria, the first RFID reader inhibits transmission of the signal through the first antenna. - View Dependent Claims (2, 3, 4)
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5. A radio frequency identification (RFID) automatic vehicle identification (AVI) system configured to mitigate signal interference, the system comprising:
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a plurality of RFID readers, wherein a first RFID reader is connected to a second adjacent RFID reader through an input/output (I/O) line; a plurality of antennas, wherein a first antenna is connected to the first RFID reader and a second antenna is connected to the second RFID reader; wherein prior to the first RFID reader transmitting a signal through the first antenna, the first RFID reader is configured to read a signal on an I/O port of the second RFID reader, and upon determining that the signal on the I/O port indicates that the second antenna is active, the first RFID reader inhibits transmission of the signal through the first antenna. - View Dependent Claims (6, 7, 8, 9, 10)
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11. A method of mitigating signal interference in a radio frequency identification (RFID) automatic vehicle identification (AVI) system comprising:
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providing a plurality of RFID readers, including a first RFID reader and a second RFID reader; providing a plurality of antennas, wherein a first antenna is connected to the first RFID reader and a second antenna is connected to the second RFID reader; sampling, with the first RFID reader, a received radio frequency (RF) signal through the first antenna, and responsive to determining that the received RF signal meets predetermined strength and frequency criteria, inhibiting, with the first RFID reader, transmission of a signal through the first antenna. - View Dependent Claims (12, 13, 14, 15)
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16. A method of mitigating signal interference in a radio frequency identification (RFID) automatic vehicle identification (AVI) system comprising:
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providing a plurality of RFID readers wherein a first RFID reader is connected to a second adjacent RFID reader through an input/output (I/O) line; providing a plurality of antennas, wherein a first antenna is connected to a first RFID reader and a second antenna is connected to a second RFID reader; wherein prior to the first RFID reader transmitting a signal through the first antenna, reading, with the first RFID reader, a signal on an I/O port of the second RFID reader; and responsive to determining that the signal on the I/O port is active for the second RFID reader, the first RFID reader inhibiting transmission of the signal through the first antenna. - View Dependent Claims (17, 18, 19)
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Specification