Radio frequency identification tag and a method of operating same
First Claim
1. An apparatus comprising a tag having circuitry that includes:
- a receiver section configured to receive wireless signpost signals that each include a signpost code;
a further section responsive to receipt of a signpost signal by said receiver section for determining whether the signpost that generated the received signpost signal is currently active; and
a transmitter section operable to transmit wireless tag signals that each include a tag code associated with said tag, said transmitter section responding to a determination by said further section that the signpost that generated the received signpost signal is currently active by including in at least one said tag signal an information portion that relates to the signpost that generated the received signpost signal, said transmitter section excluding from said tag signals information relating to signposts that are indicated to be inactive.
1 Assignment
0 Petitions
Accused Products
Abstract
A tag can transmit a tag signal, and responds to receipt of a wireless signpost signal by determining whether the signpost that generated the signal is currently active. When the signpost is respectively determined to be active and inactive, the tag respectively includes and excludes from the tag signal an information portion that relates to the signpost that generated the received signpost signal. In another configuration, a tag has first and second antennas, receives wireless signpost signals through at least one of the antennas, and responds to receipt of a signpost signal containing antenna select information by causing a selected one of the first and second antennas to be disabled and the other of the first and second antennas to receive wireless signpost signals.
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Citations
25 Claims
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1. An apparatus comprising a tag having circuitry that includes:
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a receiver section configured to receive wireless signpost signals that each include a signpost code; a further section responsive to receipt of a signpost signal by said receiver section for determining whether the signpost that generated the received signpost signal is currently active; and a transmitter section operable to transmit wireless tag signals that each include a tag code associated with said tag, said transmitter section responding to a determination by said further section that the signpost that generated the received signpost signal is currently active by including in at least one said tag signal an information portion that relates to the signpost that generated the received signpost signal, said transmitter section excluding from said tag signals information relating to signposts that are indicated to be inactive. - View Dependent Claims (2, 3, 4, 5)
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6. A method comprising:
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receiving in a receiver section of a tag wireless signpost signals that each include a signpost code; responding to receipt of a signpost signal by said receiver section by determining in a further section of said tag whether the signpost that generated the received signpost signal is currently active; and transmitting from a transmitter section of said tag wireless tag signals that each include a tag code associated with said tag, including responding to a determination by said further section that the signpost that generated the received signpost signal is currently active by causing said transmitter section to include in at least one said tag signal an information portion that relates to the signpost that generated the received signpost signal, and responding to a determination by said further section that the signpost that generated the received signpost signal is currently inactive by excluding from said tag signals information relating to inactive signposts. - View Dependent Claims (7, 8)
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- 9. An apparatus comprising a tag having circuitry that includes a receiver section having first and second antennas and configured to receive wireless signpost signals through at least one of said antennas, said receiver section being responsive to receipt of a signpost signal containing antenna select information for causing a selected one of said first and second antennas to be disabled and the other of said first and second antennas to receive wireless signpost signals.
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18. A method comprising:
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receiving in a receiver section of a tag wireless signpost signals through at least one of first and second antennas of said tag; and responding to receipt of a signpost signal containing antenna select information for causing said receiver section to disable a selected one of said first and second antennas and to use the other of said first and second antennas to receive wireless signpost signals. - View Dependent Claims (19, 20, 21, 22, 23, 24, 25)
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Specification