US 10,482,366 B2 · Mitigating adjacent RFID reader interference

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.

Claims20

Dependent claims

A radio frequency identification (RFID) system comprising:

a first RFID reader coupled to at least a first antenna and configured to transmit a first signal via the first antenna;
and
a second RFID reader coupled to a plurality of antennas and configured to transmit a second signal via at least one of the plurality of antennas, the second RFID reader configured to:
select a second antenna of the plurality of antennas for transmitting the second signal,
determine the first RFID reader is transmitting the first signal via the first antenna, and
in response to the determination, select a next antenna of the plurality of antennas to transmit the second signal.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

16/356,605Filed 18 Mar 2019 · continuation

Priority

13 Dec 2013

Published

US 2019/0213457 A111 Jul 2019

Granted

19 Nov 2019

Term ends

Not estimatedThe source records don’t support an estimate.

Classification5 codes

G06K 19/0724
The record carrier comprising an arrangement for non-contact communication, e.g. wireless communication circuits on transponder cards,…
G06K 7/10356
Using at least one antenna particularly designed for interrogating the wireless record carriers: using a plurality of antennas, e.g.…
H04B 5/77
Specially adapted for specific purposes: for interrogation
G06K
Graphical data reading

Family

Application61/915,674Us provisional application · filed 13 Dec 2013

Application61/935,394Us provisional application · filed 4 Feb 2014

PCT/US2014/069497Parent of this continuation · filed 10 Dec 2014

Application15/816,532Parent of this continuation · filed 17 Nov 2017

US 9,824,309 B2Parent of this continuation · filed 21 Nov 2017

US 2019/0213457 A1Pre-grant publication · published 11 Jul 2019

US 10,235,616 B2Parent of this continuation

Application15/102,905Parent of this continuation

US 2016/0307087 A1Published application

US 2018/0075333 A1Published application

US 10,482,366 B2This patent

From the US filing history. Foreign family members aren’t listed.

Mitigating adjacent RFID reader interference

Life of this patent

Mitigating adjacent RFID reader interference

Life of this patent

Abstract

Claims20