RFID tags adjusting to different regulatory environments, and RFID readers to so adjust them and methods
First Claim
1. An RFID reader for communicating with RFID tags, comprising:
- an interface receiving an input indicative of a present geography that is subject to an associated regulatory environment;
a lookup table storing a plurality of operating parameters for a corresponding plurality of geographies for determining, based on the input, an operating parameter suitable for the regulatory environment of the present geography; and
a controller transmitting a first configuration signal that configures the RFID tags to backscatter responses to the reader according to the operating parameter.
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Accused Products
Abstract
An RFID tag has an antenna to receive a configuration signal, and a circuit with a controller that can configure the RFID circuit responsive to the configuration signal. Configuring is such that the tag backscatters by impressing data either on the carrier frequency, or on a subcarrier in addition to the carrier signal, depending on the configuration signal. In the event of a subcarrier, the tag controller may optionally further determine a frequency of the subcarrier from the configuration signal. The tag may then be configured to backscatter differently, upon receiving a different configuration signal. A complementary reader transmits the configuration signal, thus imparting an operating parameter. The reader has an interface to receive an input indicative of a present geography, and a lookup table for determining an operating parameter based on the present geography. In one embodiment, the operating parameter is determined from regulations at that geographic location.
130 Citations
8 Claims
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1. An RFID reader for communicating with RFID tags, comprising:
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an interface receiving an input indicative of a present geography that is subject to an associated regulatory environment; a lookup table storing a plurality of operating parameters for a corresponding plurality of geographies for determining, based on the input, an operating parameter suitable for the regulatory environment of the present geography; and a controller transmitting a first configuration signal that configures the RFID tags to backscatter responses to the reader according to the operating parameter. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification