Dynamic power reduction requests for wireless communications
Methods and systems for controlling uplink (UL) transmission power of a user equipment (UE) electronic device includes determining, using the UE electronic device, that a maximum power availability for a transmission between the UE and a wireless network node is not appropriate to current conditions. Based on the determination that maximum power availability is not appropriate the UE electronic device sends a request to the wireless network node to reduce power for communication with the wireless network node. Based on the request, the UE electronic device communicates at a reduced power level for communications with the wireless network node.
1. An electronic device, comprising:
one or more antennas configured to communicate with one or more wireless network nodes; and
memory storing instructions that, when executed by one or more processors, are configured to cause the one or more processors to:
encode maximum allowed transmit power (PCMAX) values to incorporate power reductions for a plurality of cells through which the electronic device connects to one or more wireless networks;
cause the one or more antennas to transmit the PCMAX values from the electronic device to respective cells of the plurality of cells using power headroom reports; and
cause the one or more antennas to communicate with a cell of the plurality of cells using a permissible power usage level corresponding to a respective power headroom report of the power headroom reports.
2. The electronic device of claim 1 , the PCMAX values comprising PCMAX values for a plurality of carrier frequencies for at least one of the cells of the plurality of cells.
3. The electronic device of claim 1 , the plurality of cells comprising Next Generation NodeB (gNB) nodes.
4. The electronic device of claim 1 , the PCMAX values being based at least in part on capabilities of the electronic device.
5. The electronic device of claim 4 , the capabilities being used to determine the power reductions prior to establishing communication with at least one of the plurality of cells.
6. The electronic device of claim 1 , the power reductions being based at least in part on battery usage or a temperature.
7. The electronic device of claim 1 , the power reductions being based at least in part on a human body entering into proximity of the electronic device and the human body being likely to be exposed to wireless signals above a maximum permissive exposure (MPE) limit unless transmission power is reduced.
8. The electronic device of claim 7 , the proximity comprising a determination that the human body is in a communication path between the electronic device and at least one of the plurality of cells.
9. The electronic device of claim 1 , the power reductions comprising reduced duty cycles for uplink communications between the electronic device and the plurality of cells.
10. The electronic device of claim 1 , the power reductions comprising a reduced peak power used in uplink communications between the electronic device and the plurality of cells.
11. A method, comprising:
encode, using one or more processors, a maximum allowed transmit power (PCMAX) values incorporating power reductions for a plurality of cells through which a user equipment device (UE) connects to one or more wireless networks;
transmit, using one or more antennas, PCMAX values from the UE to respective cells of the plurality of cells using power headroom reports; and
communicate, using the one or more antennas, with a cell of the plurality of cells using a permissible power usage level corresponding to a respective power headroom report of the power headroom reports.
12. The method of claim 11 , the power reductions comprising a maximum duty cycle restriction that restricts communications between the UE and the plurality of cells to less than or equal to a target duty cycle.
13. The method of claim 12 , the maximum duty cycle restriction specifying a maximum uplink duty cycle between the UE and the plurality of cells.
14. The method of claim 12 , applying a power back-off (P-MPR) when an allocated percentage of UL symbols exceed the maximum duty cycle restriction.
15. The method of claim 11 , the power reductions comprising a reduced peak power used in uplink communications between the UE and the plurality of cells.
16. The method of claim 11 , the PCMAX values comprising PCMAX values for a plurality of carrier frequencies for at least one of the cells of the plurality of cells.
17. The method of claim 16 , the PCMAX values being different for at least two carrier frequencies of the plurality of carrier frequencies.
18. The method of claim 11 , the power reductions being based at least in part on a human body entering into proximity of the UE and the human body being likely to be exposed to wireless signals above a maximum permissive exposure (MPE) limit unless transmission power is reduced.
19. The method of claim 18 , the proximity comprising a determination that the human body is in a communication path between the UE and at least one of the plurality of cells.
20. The method of claim 11 , the PCMAX values being different for at least two cells of the plurality of cells.