Systems and methods of exposure control with wireless links
Described embodiments provide systems and methods for adjusting a radio usage of a wireless link according to a time-averaged specific absorption rate (SAR). A first device configured to concurrently maintain a first wireless link with a second device and a second wireless link with an access point of a network may determine a proposed radio usage of the first wireless link and the second wireless link. The first device may determine a state of the first device according to the proposed radio usage and sensor information from at least one sensor of the first device. The first device may determine a time-averaged SAR of a user due to the first device, according to a defined time window and the determined state of the first device, to adjust the proposed radio usage of the first wireless link and the second wireless link to satisfy a threshold level of the time-averaged SAR.
1. A method comprising:
determining, by a first device configured to maintain a first wireless link with a second device and a second wireless link with an access point, a proposed radio usage of the first wireless link and the second wireless link;
determining, by the first device, a state of the first device according to the proposed radio usage; and
determining, by the first device, a time-averaged specific absorption rate (SAR) due to the first device according to the determined state of the first device, to adjust the proposed radio usage.
2. The method of claim 1 , comprising:
acquiring, by at least one sensor of the first device, sensor information, wherein the sensor information comprises at least one of: a proximity of the first device to a user, whether there is contact between the first device and the user, or a motion of the first device.
3. The method of claim 1 , comprising:
determining, by the first device, the proposed radio usage according to at least one of: a quality of the first wireless link, a quality of the second wireless link, a quality-of-service (QoS) of the first wireless link, a QoS of the second wireless link, a configuration of a traffic buffer of the first wireless link, a configuration of a traffic buffer of the second wireless link, a power headroom corresponding to the first wireless link, or a power headroom corresponding to the second wireless link.
4. The method of claim 1 , wherein the proposed radio usage comprises at least one of: a data rate, a radio-frequency emission level, a transmission power, a transmission schedule, a ranking or selection of radio devices, or use of one or more antennas, of the first device for at least the first wireless link or the second wireless link.
5. The method of claim 1 , comprising:
determining, by the first device, the state of the first device further according to at least one of: traffic information of the first wireless link, or traffic information of the second wireless link.
6. The method of claim 1 , comprising:
determining, by the first device, a proposed subset of antennas to use, according to sensor information and the proposed radio usage.
7. The method of claim 6 , comprising:
determining, by the first device, the state of the first device further according to the proposed subset of antennas to use.
8. The method of claim 1 , comprising:
operating, by the first device according to the adjusted radio usage, at least one radio device of the first device for the first wireless link.
9. The method of claim 8 , comprising:
operating, by the first device according to the adjusted radio usage, at least one radio device of the first device for the second wireless link, concurrent with the operating of the at least one radio device for the first wireless link.
10. A first device configured to maintain a first wireless link with a second device and a second wireless link with an access point, the first device comprising:
at least one processor configured to:
determine a proposed radio usage of the first wireless link and the second wireless link;
determine a state of the first device according to the proposed radio usage; and
determine a time-averaged specific absorption rate (SAR) due to the first device according to the determined state of the first device, to adjust the proposed radio usage.
11. The first device of claim 10 , comprising at least one sensor, the at least one sensor configured to acquire sensor information, wherein the sensor information comprises at least one of: a proximity of the first device to a user, whether there is contact between the first device and the user, or a motion of the first device.
12. The first device of claim 10 , wherein the at least one processor is configured to:
determine the proposed radio usage according to at least one of: a quality of the first wireless link, a quality of the second wireless link, a quality-of-service (QoS) of the first wireless link, a QoS of the second wireless link, a configuration of a traffic buffer of the first wireless link, a configuration of a traffic buffer of the second wireless link, a power headroom corresponding to the first wireless link, or a power headroom corresponding to the second wireless link.
13. The first device of claim 10 , wherein the proposed radio usage comprises at least one of: a data rate, a radio-frequency emission level, a transmission power, a transmission schedule, a ranking or selection of radio devices, or use of one or more antennas, of the first device for at least the first wireless link or the second wireless link.
14. The first device of claim 10 , wherein the at least one processor is configured to:
determine the state of the first device further according to at least one of: traffic information of the first wireless link, or traffic information of the second wireless link.
15. The first device of claim 10 , wherein the at least one processor is configured to:
determine a proposed subset of antennas to use, according to sensor information and the proposed radio usage.
16. The first device of claim 15 , wherein the at least one processor is configured to:
determine the state of the first device further according to the proposed subset of antennas to use.
17. The first device of claim 10 , wherein the at least one processor is configured to:
operate, according to the adjusted radio usage, at least one radio device of the first device for the first wireless link.
18. The first device of claim 17 , wherein the at least one processor is configured to:
operate, according to the adjusted radio usage, at least one radio device of the first device for the second wireless link, concurrent with the operating of the at least one radio device for the first wireless link.
19. A non-transitory computer readable medium storing instructions for causing at least one processor of a first device configured to maintain a first wireless link with a second device and a second wireless link with an access point, to:
determine a proposed radio usage of the first wireless link and the second wireless link;
determine a state of the first device according to the proposed radio usage; and
determine a time-averaged specific absorption rate (SAR) due to the first device according to the determined state of the first device, to adjust the proposed radio usage.
20. The non-transitory computer readable medium of claim 19 , wherein the instructions cause the at least one processor to:
determine the proposed radio usage according to at least one of: a quality of the first wireless link, a quality of the second wireless link, a quality-of-service (QoS) of the first wireless link, a QoS of the second wireless link, a configuration of a traffic buffer of the first wireless link, a configuration of a traffic buffer of the second wireless link, a power headroom corresponding to the first wireless link, or a power headroom corresponding to the second wireless link.