METHOD AND SYSTEM TO CONTROL AMBIENT RF ENERGY FOR WIRELESS DEVICES
First Claim
1. A method to control energy that is available for wireless power harvesting, the method comprising:
- determining to increase radio-frequency (RF) energy available to power a wireless tag incorporating wireless power harvesting; and
controlling the RF energy delivered to the wireless tag to provide tag energy, using one or more of;
a) increasing transmission RF power of one or more wireless communication devices,b) increasing a duty cycle associated with wireless transmissions of one or more wireless communication devices, andc) decreasing path loss of the power to the wireless tag.d) varying the frequency or channel of operatione) varying the power spectral density (PSD) of the transmitted signal,f) transmitting on a subset of antennas from among a plurality of antennas.
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Accused Products
Abstract
A method and apparatus is disclosed herein for controlling radio-frequency (RF) energy for wireless devices. In one embodiment, the method comprises determining to increase radio-frequency (RF) energy available to power a wireless tag and controlling the RF energy delivered to the wireless tag to provide tag energy, using one or more of: a) increasing transmission RF power of one or more wireless communication devices, b) increasing a duty cycle associated with wireless transmissions of one or more wireless communication devices, and c) decreasing path loss of the power to the wireless tag.
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Citations
20 Claims
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1. A method to control energy that is available for wireless power harvesting, the method comprising:
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determining to increase radio-frequency (RF) energy available to power a wireless tag incorporating wireless power harvesting; and controlling the RF energy delivered to the wireless tag to provide tag energy, using one or more of; a) increasing transmission RF power of one or more wireless communication devices, b) increasing a duty cycle associated with wireless transmissions of one or more wireless communication devices, and c) decreasing path loss of the power to the wireless tag. d) varying the frequency or channel of operation e) varying the power spectral density (PSD) of the transmitted signal, f) transmitting on a subset of antennas from among a plurality of antennas. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system to control energy that is available for powering wireless tags, the system comprising:
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a memory; and a processor coupled to the memory and operable to; determine to increase radio-frequency (RF) energy available to power a wireless tag, and control the RF energy delivered to the wireless tag to provide tag energy by using one or more of; a) increasing transmission RF power of one or more wireless communication devices, b) increasing a duty cycle associated with wireless transmissions of one or more wireless communication devices, and c) decreasing path loss of the power to the wireless tag. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. An article of manufacture having one or more computer readable storage media having instructions thereon which, when executed by a system, cause the system to perform a method comprising:
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determining to increase radio-frequency (RF) energy available to power a wireless tag; and controlling the RF energy delivered to the wireless tag to provide tag energy, using one or more of; a) increasing transmission RF power of one or more wireless communication devices, b) increasing a duty cycle associated with wireless transmissions of one or more wireless communication devices, and c) decreasing path loss of the power to the wireless tag.
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Specification