Power management of radio transceiver elements
First Claim
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1. A radio receiver, comprising:
- an RF front end for receiving an inbound radio frequency (RF) signal and a local oscillation and producing a baseband signal from the inbound RF signal and the local oscillation;
a baseband processing module for producing inbound data from the baseband signal;
a local oscillator for generating the local oscillation; and
a power control module for;
identifying a receiver inactivity time corresponding to a time period between received RF signals in an established communication link;
identifying one or more elements of at least one of the RF front end, baseband processing module and local oscillator that can be powered down and back up within the receiver inactivity time to reduce power consumption; and
identifying a restoration time for at least one element of the one or more elements, wherein the restoration time is a time at which the at least one element should automatically be powered on in order to achieve an operational mode steady state prior to the expiration of the receiver inactivity time.
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Abstract
A radio receiver includes a power control module for selectively powering down and powering up radio receiver elements in between known communication periods according to one aspect of the present invention. According to a second aspect of the invention, the radio receiver operates in a low power mode of operation and periodically “sniffs” to determine whether an access point has messages or communication signals to transmit to it.
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Citations
20 Claims
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1. A radio receiver, comprising:
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an RF front end for receiving an inbound radio frequency (RF) signal and a local oscillation and producing a baseband signal from the inbound RF signal and the local oscillation; a baseband processing module for producing inbound data from the baseband signal; a local oscillator for generating the local oscillation; and a power control module for; identifying a receiver inactivity time corresponding to a time period between received RF signals in an established communication link; identifying one or more elements of at least one of the RF front end, baseband processing module and local oscillator that can be powered down and back up within the receiver inactivity time to reduce power consumption; and identifying a restoration time for at least one element of the one or more elements, wherein the restoration time is a time at which the at least one element should automatically be powered on in order to achieve an operational mode steady state prior to the expiration of the receiver inactivity time. - View Dependent Claims (2, 3, 4, 5)
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6. A radio receiver, comprising:
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an RF front end for receiving an inbound radio frequency (RF) signal and a local oscillation and producing a baseband signal from the inbound RF signal and the local oscillation; a baseband processing module for producing inbound data from the baseband signal; a local oscillator for generating the local oscillation; and a power control module for; identifying a radio receiver element inactivity time for at least one radio receiver element of the RF front end, baseband processing module and local oscillator in an established communication link; powering down, based upon the determined radio receiver element inactivity time, the at least one radio receiver element; identifying a restoration time for the at least one radio receiver element, wherein the restoration time is a time at which the at least one radio receiver element should automatically be powered on in order to achieve an operational mode steady state prior to the expiration of the radio receiver element inactivity time; and powering the at least one radio receiver element to an operational mode based solely on the restoration time. - View Dependent Claims (7, 8, 9, 10, 11)
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12. A radio receiver, comprising:
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an RF front end for receiving an inbound radio frequency (RF) signal and a local oscillation and producing a baseband signal from the inbound RF signal and the local oscillation; a baseband processing module for producing inbound data from the baseband signal; a local oscillator for generating the local oscillation; and a power control module for; identifying a radio receiver element inactivity time for at least one radio receiver element of the RF front end, the baseband processing module and the local oscillator in an established communication link; identifying a restoration time for the at least one radio receiver element, wherein the restoration time is a time at which the at least one radio receiver element should automatically be powered on in order to achieve an operational mode steady state prior to the expiration of the radio receiver element inactivity time; determining whether to place the at least one radio receiver element into a power reduction mode based on the radio receiver element inactivity time; determining what type of a plurality of types of power reduction modes should be selected for the at least one radio receiver element if it is to be placed into the power reduction mode; placing the at least one radio receiver element into the selected power reduction mode; and powering the at least one radio receiver element to an operational mode based solely on the restoration time. - View Dependent Claims (13, 14, 15, 16, 17, 18, 19)
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20. A radio receiver, comprising:
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an RF front end for receiving an inbound radio frequency (RF) signal and a local oscillation and producing a baseband signal from the inbound RF signal and the local oscillation; a baseband processing module for producing inbound data from the baseband signal; a local oscillator for generating the local oscillation; and a power control module for; identifying one or more elements of the RF front end, the baseband processing module and the local oscillator that can be powered down and back up within a receiver inactivity time to reduce power consumption, wherein the receiver inactivity time is a time period between received RF signals in an established communication link; and powering at least one element of the one or more elements to an operational mode based only upon a restoration time, wherein the at least one element has reached a steady state of operation by the expiration of the receiver inactivity time, wherein the restoration time is a time at which the at least one element should automatically be powered on in order to achieve an operational mode steady state prior to the expiration of the receiver inactivity time.
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Specification