Reduced-power transmitting from a communications device
First Claim
1. A method for transmitting from a communications device, the method comprising:
- determining, by the communications device, a specific absorption rate (SAR) allowance comprising an amount of radio frequency (RF) energy that is allowed to be received by a user of the communications device within a time frame;
calculating, by the communications device, a current amount of RF energy (RFe) received by the user, the RFe comprising an integral of transmission power level over a time;
calculating, by the communications device, a percentage of the SAR allowance that the RFe comprises;
responsive to the percentage being above a first threshold that is less than the SAR allowance;
determining a first diminished transmission power level, by the communications device, based on the first threshold; and
transmitting, by the communications device, at the first diminished transmission power level; and
responsive to the percentage being above a second threshold that is less than the SAR allowance but greater than the first threshold;
determining, by the communications device, a second diminished transmission power level that is less than the first diminished transmission power level based on the second threshold; and
transmitting, by the communications device, at the second diminished transmission power.
2 Assignments
0 Petitions
Accused Products
Abstract
Aspects of the present disclosure teach decreasing, in a time-averaged regime, the amount of RF energy emitted by a communications device. Generally speaking, the network tells the communications device what power level it should transmit at. If, however, the device determines that it would exceed an emission standard by transmitting at the specified power level for as long as it needs to in order to carry out its transmission duties, then the device can instead decide to transmit at a lower power level. Alternatively (or in combination), the device can, instead of transmitting all the time while it has data to send, only transmit intermittently. In either case, the emitted electromagnetic energy, as averaged over a period of time, is reduced below the maximum allowed by the standard. Later, if possible and necessary, the device can again transmit at a higher power level or more frequently.
173 Citations
20 Claims
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1. A method for transmitting from a communications device, the method comprising:
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determining, by the communications device, a specific absorption rate (SAR) allowance comprising an amount of radio frequency (RF) energy that is allowed to be received by a user of the communications device within a time frame; calculating, by the communications device, a current amount of RF energy (RFe) received by the user, the RFe comprising an integral of transmission power level over a time; calculating, by the communications device, a percentage of the SAR allowance that the RFe comprises; responsive to the percentage being above a first threshold that is less than the SAR allowance; determining a first diminished transmission power level, by the communications device, based on the first threshold; and transmitting, by the communications device, at the first diminished transmission power level; and responsive to the percentage being above a second threshold that is less than the SAR allowance but greater than the first threshold; determining, by the communications device, a second diminished transmission power level that is less than the first diminished transmission power level based on the second threshold; and transmitting, by the communications device, at the second diminished transmission power. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A communications device, the communications device comprising:
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one or more processors; a communications interface; one or more computer-readable storage media comprising instructions that, when executed by the one or more processors, cause the communications device to perform operations comprising; determining a specific absorption rate (SAR) allowance comprising an amount of radio frequency (RF) energy that is allowed to be received by a user of the communications device within a time frame; calculating a current amount of RF energy (RFe) received by the user, the RFe comprising an integral of transmission power level over a time; calculating a percentage of the SAR allowance that the RFe comprises; responsive to the percentage being above a first threshold that is less than the SAR allowance; determining a first diminished transmission power level based on the first threshold; and transmitting at the first diminished transmission power level via the communications interface; and responsive to the percentage being above a second threshold that is less than the SAR allowance but greater than the first threshold; determining a second diminished transmission power level that is less than the first diminished transmission power based on the second threshold; and transmitting at the second diminished transmission power level. - View Dependent Claims (13, 14, 15, 16)
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17. One or more non-transitory computer-readable storage media comprising instructions, that, when executed by one or more processors, reduce an amount of radio frequency (RF) energy absorbed by a user of a communications device by:
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calculating a percentage of a specific absorption rate (SAR) allowance that a current amount of RF energy (RFe) received by the user comprises, the SAR allowance comprising an amount of radio frequency (RF) energy that is allowed to be received by the user of the communications device within a time frame, the RFe comprising a an integral of transmission power level for a time; responsive to the percentage being above a first threshold that is less than the SAR allowance, transmitting at a first diminished transmission power level determined by the first threshold effective to lower the RFe; and responsive to the percentage being above a second threshold that is higher than the first threshold but less than the SAR allowance, transmitting at a second diminished transmission power level determined by the second threshold effective to further lower the RFe. - View Dependent Claims (18, 19, 20)
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Specification