Specific absorption rate and maximum permitted exposure mitigation

Patent metadata

Field	Value
Publication number	US-12452801-B2
Application number	US-202017765344-A
Country	US
Kind code	B2
Filing date	Oct 1, 2020
Priority date	Oct 1, 2019
Publication date	Oct 21, 2025
Grant date	Oct 21, 2025

Abstract

Systems for performing radiation exposure monitoring that accommodate operating in multiple frequency bands are provided. A WTRU may be configured to monitor radiation exposure by determining an averaged power over an evaluation period. The radiation may be measured over a moving averaging window. The averaged measured power may be compared against SAR or MPE limits which may be defined in terms of normalized fractions or ratios in dB. The WTRU may be configured to measure for an averaged power periodically and/or in response to triggers.

First claim

What is claimed:

1. A wireless transmit receive unit (WTRU) comprising:
a processor configured at least to:
receive information indicating a power density value;
receive an indication of a threshold fraction of the power density value;
determine a duty cycle;
determine a measured power density associated with the duty cycle;
determine the measured power density satisfies the threshold fraction of the power density value;
generate a report associated with a determination that the measured power density satisfies the threshold fraction of the power density value; and
transmit the report.

2. The WTRU of claim 1 , wherein the power density value is a power density threshold value.

3. The WTRU of claim 1 , wherein the processor configured to determine the duty cycle is further configured to receive information indicating the duty cycle.

4. The WTRU of claim 1 , wherein the measured power density is associated with measurements taken over a period of time.

5. The WTRU of claim 1 , wherein the information indicating the power density value comprises information indicating a maximum permitted exposure (MPE).

6. The WTRU of claim 1 , wherein the report indicates an available power density.

7. The WTRU of claim 6 , wherein the available power density is indicated as a fraction of the power density value.

8. The WTRU of claim 1 , the processor is further configured to:
if the WTRU receives an acknowledgment before a time period elapses, apply a modified configuration.

9. The WTRU of claim 8 , wherein the modified configuration is received by the WTRU from a network device.

10. The WTRU of claim 8 , wherein the time period is measured from a time that the report is transmitted.

11. A method comprising:
receiving, by a wireless transmit and receive unit (WTRU), information indicating a power density value;
receiving, by the WTRU, an indication of a threshold fraction of the power density value;
determining, by the WTRU, a duty cycle;
determining, by the WTRU, a measured power density associated with the duty cycle;
determining, by the WTRU, that the measured power density satisfies the threshold fraction of the power density value;
generating, by the WTRU, a report associated with determining that the measured power density satisfies the threshold fraction of the power density value; and
transmitting, by the WTRU, the report.

12. The method of claim 11 , wherein the power density value is a power density threshold value.

13. The method of claim 11 , wherein determining the duty cycle comprises receiving information indicating the duty cycle.

14. The method of claim 11 , wherein the measured power density is associated with measurements taken over a period of time.

15. The method of claim 11 , wherein the information indicating the power density value comprises information indicating a maximum permitted exposure (MPE).

16. The method of claim 11 , wherein the report indicates an available power density.

17. The method of claim 16 , wherein the available power density is indicated as a fraction of the power density value.

18. The method of claim 11 , further comprising:
if the WTRU receives an acknowledgment before a time period elapses, applying a modified configuration.

Assignees

• Interdigital Patent Holdings Inc

Inventors

• Comsa Virgil
• Marinier Paul
• Haghighat Afshin
• Lee Moon-Il

Classifications

• H04B17/318

  Received signal strength · CPC title

• H04W52/365

  Power headroom reporting · CPC title

• H04W24/10

  Scheduling measurement reports {; Arrangements for measurement reports} · CPC title

• H04B17/24

  with feedback of measurements to the transmitter · CPC title

• H04W52/367 Primary

  Power values between minimum and maximum limits, e.g. dynamic range · CPC title