Radio frequency indentification device communications systems, wireless communication devices, wireless communication systems, backscatter communication methods, radio frequency identification device communication methods and a radio frequency identification device
First Claim
1. A radio frequency identification device communications system comprising:
- a reader configured to output a plurality of first wireless communication signals;
a radio frequency identification device configured to receive the first wireless communication signals and to output a plurality of second wireless communication signals; and
wherein the radio frequency identification device is configured to output some of the second wireless communication signals according to a first modulation frequency and responsive to the first wireless communication signals, and to output others of the second wireless communication signals according to a second modulation frequency different than the first modulation frequency and responsive to stimulus internal of the radio frequency identification device.
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Accused Products
Abstract
Radio frequency identification device communications systems, wireless communication devices, wireless communication systems, backscatter communications methods, radio frequency identification device communications methods and a wireless communication are provided. In one aspect, a radio frequency identification device communications system includes a reader configured to output a plurality of first wireless communication signals, a radio frequency identification device configured to receive the first wireless communication signals and to output a plurality of second wireless communication signals and wherein the radio frequency identification device is configured to output some of the second wireless communication signals according to a first modulation frequency and responsive to the first wireless communication signals, and to output others of the second wireless communication signals according to a second modulation frequency different than the first modulation frequency and responsive to stimulus internal of the radio frequency identification device.
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Citations
47 Claims
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1. A radio frequency identification device communications system comprising:
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a reader configured to output a plurality of first wireless communication signals;
a radio frequency identification device configured to receive the first wireless communication signals and to output a plurality of second wireless communication signals; and
wherein the radio frequency identification device is configured to output some of the second wireless communication signals according to a first modulation frequency and responsive to the first wireless communication signals, and to output others of the second wireless communication signals according to a second modulation frequency different than the first modulation frequency and responsive to stimulus internal of the radio frequency identification device. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A wireless communication device comprising:
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communication circuitry configured to process a plurality of first wireless communication signals from a reader and to control outputting of a plurality of second wireless communication signals to the reader using backscatter modulation; and
wherein the communication circuitry is further configured to synchronize communication of selected ones of the second wireless communication signals responsive to the first communication signals and to asynchronously communicate selected others of the second wireless communication signals. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23, 24, 25)
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26. A wireless communications system comprising:
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a reader configured to output a plurality of first wireless signals and to receive a plurality second wireless signals;
a plurality of communication devices configured to receive the first wireless signals and to output the second wireless signals using backscatter modulation; and
wherein the communication devices are individually configured to implement the backscatter modulation utilizing a plurality of different modulation frequencies. - View Dependent Claims (27)
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28. A radio frequency identification device comprising:
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an antenna configured to communicate wireless signals;
radio frequency identification device communication circuitry coupled with the antenna and configured to process a plurality of first wireless signals received from a reader and to control the outputting of a plurality of second wireless signals using the antenna to implement radio frequency identification device communications with the reader; and
wherein the radio frequency identification device communication circuitry is configured to utilize a first modulation frequency to control the outputting of a first one of the second wireless signals and a second modulation frequency different than the first modulation frequency to control the outputting of a second one of the second wireless signals.
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29. A backscatter communications method comprising:
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providing a reader and a communication device;
outputting a plurality of first wireless communication signals using the reader;
receiving the first wireless communication signals using the communication device; and
communicating a plurality of second wireless communication signals using the communication device, the communicating comprising;
first backscatter modulating using the communication device according to a first modulation frequency and responsive to receiving at least one of the first wireless communication signals; and
second backscatter modulating using the communication device according to a second modulation frequency different than the first modulation frequency and independent of the first wireless communication signals. - View Dependent Claims (30, 31, 32, 33, 34, 35, 36)
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37. A radio frequency identification device communications method comprising:
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providing a radio frequency identification device;
receiving a plurality of first wireless communication signals from a reader using the radio frequency identification device;
providing a stimulus unrelated to the first wireless communication signals; and
communicating a plurality of second wireless communication signals using the radio frequency identification device, wherein the communicating comprises communicating at least some of the second wireless communication signals responsive to the providing the stimulus. - View Dependent Claims (38, 39, 40, 41, 42, 43, 44, 45, 46)
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47. A radio frequency identification device communications method comprising:
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providing a reader;
providing a radio frequency identification device;
communicating a plurality of first wireless communication signals using the reader;
receiving the first wireless communication signals using the radio frequency identification device;
backscatter modulating using the radio frequency identification device and according to a first modulation frequency to communicate some of a plurality of second wireless communication signals responsive to the receiving the first wireless communication signals;
providing a stimulus unrelated to the first wireless communication signals;
backscatter modulating using the radio frequency identification device and according to a second modulation frequency different than the first modulation frequency to communicate others of the second wireless communication signals, wherein the backscatter modulating according to the second modulation frequency comprises backscatter modulating independent of the receiving the first wireless communication signals and responsive to the providing the stimulus;
receiving the some and the others of the second wireless communication signals using the reader; and
communicating a predefined one of the first wireless communication signals responsive to receiving at least one of the others of the second wireless communication signals.
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Specification