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. A cellular device, comprising:
processing circuitry; and
communication circuitry coupled to the processing circuitry and configured to:
request a power reduction to a cellular network node using a power back-off (P-MPR);
receive an allocation from the cellular network node;
during an allocated slot during the allocation, send a radio resource control (RRC) signal that includes the P-MPR;
in response to the RRC signal, receive an indication of how to reduce power; and
in response to receiving the indication, reduce power consumption according to the indication.
2. The cellular device of claim 1 , wherein the processing circuitry is configured to:
determine whether a timer has expired; and
when the timer has not expired, wait to request the power reduction until the timer expires.
3. The cellular device of claim 1 , wherein the request is based on a crossed threshold of a parameter of the cellular device.
4. The cellular device of claim 3 , wherein parameter of the cellular device comprises a temperature of the cellular device, available power of the cellular device, battery usage of the cellular device, or a combination thereof.
5. The cellular device of claim 3 , wherein the RRC signal includes assistance information detailing information about the cellular device.
6. The cellular device of claim 5 , wherein the assistance information comprises information about the parameter.
7. The cellular device of claim 5 , wherein the assistance information comprises information about a duty cycle of the cellular device, information about capability changes of the cellular device, or a combination thereof.
8. The cellular device of claim 5 , wherein the assistance information comprises information about the P-MPR.
9. A method, comprising:
encoding, using a processor of a cellular device, a power headroom report (PHR) MAC control element (CE) with assistance information detailing information about the cellular device;
requesting, from the cellular device, a power reduction to a cellular network node using the PHR MAC CE with the assistance information; and
communicating at a reduced power level for communications between the cellular network node and the cellular device based on a schedule of the cellular network node.
10. The method of claim 9 , wherein the assistance information comprises information about a parameter of the cellular device.
11. The method of claim 10 , wherein the parameter of the cellular device comprises a temperature of the cellular device, available power of the cellular device, battery usage of the cellular device, or a combination thereof.
12. The method of claim 9 , wherein the assistance information comprises information about a duty cycle of the cellular device, information about capability changes of the cellular device, or a combination thereof.
13. The method of claim 9 , wherein the PHR MAC CE comprises a single-entry PHR MAC CE that comprises a power headroom field that has a first encoded value that indicates a power level for the cellular device.
14. The method of claim 13 , wherein the single-entry PHR MAC CE comprises:
a maximum output power field that has a second encoded value that indicates a maximum output power level of the cellular device; and
an assistance information field that has a third encoded value that indicates the assistance information.
15. The method of claim 14 , wherein the second encoded value corresponds to a respective nominal transmit power level measured in dBs.
16. The method of claim 9 , wherein the PHR MAC CE comprises a multiple-entry PHR MAC CE that includes separate entries for power headroom and a maximum output power for a primary cell (Pcell) and one or more serving cells.
17. A user equipment (UE), comprising:
processing circuitry configured to encode a power headroom report (PHR) MAC control element (CE) with assistance information detailing information about the UE; and
communication circuitry coupled to the processing circuitry and configured to:
transmit, from the UE, a power reduction to a cellular network node using the PHR MAC CE with the assistance information; and
communicate at a reduced power level for communications between the cellular network node and the UE based on a schedule of the cellular network node.
18. The UE of claim 17 , wherein the PHR MAC CE comprises a single-entry PHR MAC CE that comprises:
a power headroom field that has a first encoded value that indicates a power level for the UE;
a maximum output power field that has a second encoded value that indicates a maximum output power level of the UE; and
an assistance information field that has a third encoded value that indicates the assistance information.
19. The UE of claim 17 , wherein the PHR MAC CE comprises a multiple-entry PHR MAC CE that includes separate entries for a power headroom and a maximum output power for a primary cell (Pcell) and one or more serving cells.
20. The UE of claim 17 , wherein the assistance information comprises information about a parameter of the UE, information about a duty cycle of the UE, information about capability changes of the UE, information about a power backoff (P-MPR), or a combination thereof, wherein the parameter of the UE comprises a temperature of the UE, available power of the UE, battery usage of the UE, or a combination thereof.