Wireless link control based on time averaged specific absorption rate and quality of service

1. A device comprising:

at least one communication interface;

a sensor configured to detect a proximity of a user; and

at least one processor coupled to the sensor, the at least one processor configured to:

determine a quality of service (QoS) indicating a target performance of a communication link of the at least one communication interface,

determine radio resource information of the at least one communication interface,

predict an amount of radiation exposure for a time period according to the QoS, the radio resource information, and the detected proximity of the user,

compare the predicted amount of radiation exposure for the time period against a time averaged threshold amount of radiation exposure, and

allocate radio resources to the at least one communication interface, according to the comparison by determining a first transmission power level to meet the target performance during a first time period of the time period and a second transmission power level during a second time period of the time period, the second transmission power level less than the time averaged threshold amount of radiation exposure.

2. The device of claim 1 , wherein the at least one processor is configured to:

allocate a first amount of radio resources to the at least one communication interface, if the predicted amount of radiation exposure is above the time averaged threshold amount of radiation exposure, and

allocate a second amount of radio resources higher than the first amount of radio resources, to the at least one communication interface, if the predicted amount of radiation exposure is less than the time averaged threshold amount of radiation exposure.

3. The device of claim 1 , wherein the at least one communication interface includes a first communication interface and a second communication interface, and the at least one processor is configured to:

increase a portion of the radio resources to allocate to the first communication interface to satisfy a first QoS of the first communication interface that is higher than a second QoS of the second communication interface, and

decrease a portion of the radio resources to allocate to the second communication interface.

4. The device of claim 1 , wherein the radio resource information includes at least one of: a power headroom, a power level of power source or a frequency band of the at least one communication interface.

5. The device of claim 1 , wherein the at least one communication interface includes a first communication interface and a second communication interface, and the at least one processor is configured to:

decrease a portion of the radio resources to allocate to the second communication interface, according to a power headroom indicated by the radio resource information, and

increase a portion of the radio resources to allocate to the first communication interface to satisfy a QoS of the first communication interface.

6. The device of claim 1 , wherein the sensor is configured to detect whether the device is in contact with the user.

7. The device of claim 6 , wherein the at least one processor is configured to:

predict the amount of radiation exposure for the time period to be a first amount, if the device is in contact with the user, and

predict the amount of radiation exposure for the time period to be a second amount that is less than the first amount, if the device is not in contact with the user.

8. The device of claim 1 , wherein the at least one processor is configured to allocate the radio resources to the at least one communication interface by:

determining the first transmission power level for the at least one communication interface to support the QoS during the first time period within the time period, and

determining the second transmission power level for the at least one communication interface less than the first transmission power level during the second time period within the time period, the amount of radiation exposure corresponding to a time average of i) the first transmission power level and ii) the second transmission power level.

9. The device of claim 1 , wherein the at least one processor is configured to:

determine, according to the QoS and the radio resource information, a device state of each of a first communication interface and a second communication interface of the at least one communication interface, and

allocate the radio resources to the first communication interface and the second communication interface, according to the determined device states.

10. A method comprising:

detecting, by a sensor, a proximity of a user;

determining, by at least one processor, a quality of service (QoS) indicating a target performance of a communication link of at least one communication interface;

determining, by the at least one processor, radio resource information of the at least one communication interface;

predicting, by the at least one processor, an amount of radiation exposure for a time period according to the QoS, the radio resource information, and the detected proximity of the user;

comparing, by the at least one processor, the predicted amount of radiation exposure for the time period against a time averaged threshold amount of radiation exposure; and

allocating, by the at least one processor, radio resources to the at least one communication interface, according to the comparison, the radio resources having a first transmission power level to meet the target performance during a first time period of the time period and a second transmission power level during a second time period of the time period, the second transmission power level less than the time averaged threshold amount of radiation exposure.

11. The method of claim 10 , further comprising:

allocating, by the at least one processor, a first amount of radio resources to the at least one communication interface, if the predicted amount of radiation exposure is above the time averaged threshold amount of radiation exposure; and

allocating, by the at least one processor, a second amount of radio resources higher than the first amount of radio resources, to the at least one communication interface, if the predicted amount of radiation exposure is less than the time averaged threshold amount of radiation exposure.

12. The method of claim 10 , wherein the at least one communication interface includes a first communication interface and a second communication interface, the method further comprising:

increasing, by the at least one processor, a portion of the radio resources to allocate to the first communication interface to satisfy a first QoS of the first communication interface that is higher than a second QoS of the second communication interface; and

decreasing, by the at least one processor, a portion of the radio resources to allocate to the second communication interface.

13. The method of claim 10 , wherein the radio resource information includes at least one of: a power headroom, a power level of power source or a frequency band of the at least one communication interface.

14. The method of claim 10 , wherein the at least one communication interface includes a first communication interface and a second communication interface, the method further comprising:

decreasing, by the at least one processor, a portion of the radio resources to allocate to the second communication interface, according to a power headroom indicated by the radio resource information; and

increasing, by the at least one processor, a portion of the radio resources to allocate to the first communication interface to satisfy a QoS of the first communication interface.

15. The method of claim 10 , wherein detecting the proximity of the user comprises detecting whether a device including the sensor is in contact with the user.

16. The method of claim 15 , further comprising:

predicting, by the at least one processor, the amount of radiation exposure for the time period to be a first amount, if the device is in contact with the user; and

predicting, by the at least one processor, the amount of radiation exposure for the time period to be a second amount that is less than the first amount, if the device is not in contact with the user.

17. The method of claim 10 , wherein allocating the radio resources to the at least one communication interface comprises:

determining, by the at least one processor, the first transmission power level for the at least one communication interface to support the QoS during the first time period within the time period, and

determining, by the at least one processor, the second transmission power level for the at least one communication interface less than the first transmission power level during the second time period within the time period, the amount of radiation exposure corresponding to a time average of i) the first transmission power level and ii) the second transmission power level.

18. The method of claim 10 , further comprising:

determining, by the at least one processor according to the QoS and the radio resource information, a device state of each of a first communication interface and a second communication interface of the at least one communication interface; and

allocating, by the at least one processor, the radio resources to the first communication interface and the second communication interfaces, according to the determined device states.

19. A non-transitory computer readable medium storing instructions for causing one or more processors to:

cause a sensor to detect a proximity of a user; and

determine a quality of service (QoS) indicating a target performance of a communication link of at least one communication interface;

determine radio resource information of the at least one communication interface;

predict an amount of radiation exposure for a time period according to the QoS, the radio resource information, and the detected proximity of the user;

compare the predicted amount of radiation exposure for the time period against a time averaged threshold amount of radiation exposure; and

allocate radio resources to the at least one communication interface, according to the comparison, the radio resources corresponding to a first transmission power level during a first portion of the time period and a second transmission power level during a second portion of the time period, the first transmission power level greater than the time averaged threshold amount of radiation exposure, the second transmission power level less than the time averaged threshold amount of radiation exposure.

20. The non-transitory computer readable medium of claim 19 , wherein the instructions cause the one or more processors to:

increase a portion of the radio resources to allocate to a first communication interface of the at least one communication interface, to satisfy a first QoS of the first communication interface that is higher than a second QoS of a second communication interface of the at least one communication interface; and

decrease a portion of the radio resources to allocate to the second communication interface.