RFID readers and systems initializing after antenna switch and methods
First Claim
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1. A method for an RFID reader system employing antenna switching, comprising:
- causing a first signal for a first tag operation to be radiated through a first antenna;
turning off the first signal for a first reason, wherein the first tag operation includes a tag inventory operation;
determining whether the first reason is an antenna change from the first antenna to a second antenna;
if the first reason is the antenna change, causing a second signal to be radiated through the second antenna, for a second tag operation that does not continue the first tag operation, wherein the second tag operation includes restarting the tag inventory operation though the second antenna.
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Abstract
RFID readers, reader systems, and methods are provided for processing RFID tags through interruptions for antenna change or other reasons. If the reason for the interruption is an antenna change, the reader restarts processing the tags initializing any operational parameters. If the reason is other than an antenna change, the reader determines whether the operation is to be continued or to be restarted upon power up and proceeds accordingly.
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Citations
76 Claims
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1. A method for an RFID reader system employing antenna switching, comprising:
- causing a first signal for a first tag operation to be radiated through a first antenna;
turning off the first signal for a first reason, wherein the first tag operation includes a tag inventory operation;
determining whether the first reason is an antenna change from the first antenna to a second antenna;
if the first reason is the antenna change, causing a second signal to be radiated through the second antenna, for a second tag operation that does not continue the first tag operation, wherein the second tag operation includes restarting the tag inventory operation though the second antenna. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19)
- causing a first signal for a first tag operation to be radiated through a first antenna;
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20. An RFID reader system employing antenna switching, the system comprising:
at least a first antenna and a second antenna;
a signal processing circuit coupled to the first and second antenna configured to;
cause a first signal for a first tag operation to be radiated through a first antenna;
turn off the first signal for a first reason, wherein the first tag operation includes a tag inventory operation;
determine whether the first reason is an antenna change from the first antenna to a second antenna;
if the first reason is the antenna change, cause a second signal to be radiated through the second antenna, for a second tag operation that does not continue the first tag operation, wherein the second tag operation includes restarting the tag inventory operation though the second antenna.- View Dependent Claims (21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38)
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39. A Digital Signal Processing (DSP) chip for an RFID reader system coupled to at least a first antenna and a second antenna, the DSP chip comprising:
- circuitry configured to;
cause a first signal for a first tag operation to be radiated though a first antenna;
turn off the first signal for a first reason, wherein the first tag operation includes a tag inventory operation;
determine whether the first reason is an antenna change from the first antenna to a second antenna;
if the first reason is the antenna change, cause a second signal to be radiated through the second antenna, for a second tag operation that does not continue the first tag operation, wherein the second tag operation includes restarting the tag inventory operation though the second antenna. - View Dependent Claims (40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57)
- circuitry configured to;
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58. A non-transitory machine-readable storage medium with instructions encoded thereon for operating an RFID reader system coupled to at least a first antenna, the instructions such that, if executed by a machine that is reading them result in operations comprising:
causing a first signal for a first tag operation to be radiated through a first antenna;
turning off the first signal for a first reason, wherein the first tag operation includes a tag inventory operation;
determining whether the first reason is an antenna change from the first antenna to a second antenna;
if the first reason is the antenna change, causing a second signal to be radiated through the second antenna, for a second tag operation that does not continue the first tag operation, wherein the second tag operation includes restarting the tag inventory operation though the second antenna.- View Dependent Claims (59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76)
Specification