Power control for wireless communications
Wireless communications may be used to support transmission power control. A reference signal may be mapped to a power control parameter set. A message to schedule a transmission may be received that indicates the power control parameter set. A transmission power for the scheduled transmission may be determined based on the reference signal.
1. A method comprising:
based on a received medium access control (MAC) control element (CE) comprising a pathloss reference reference signal (RS) index indicating a reference signal, mapping, by a wireless device, the pathloss reference RS index to a power control parameter set;
receiving downlink control information (DCI) for scheduling transmission of an uplink signal, wherein the DCI comprises a sounding reference signal resource indicator (SRI) field indicating the power control parameter set; and
transmitting, based on the reference signal indicated by the pathloss reference RS index mapped to the power control parameter set, the uplink signal.
2. The method of claim 1 , further comprising:
receiving one or more messages comprising one or more configuration parameters indicating a plurality of power control parameter sets comprising the power control parameter set.
3. The method of claim 1 , further comprising:
based on the received MAC CE, mapping the reference signal to spatial relation information associated with a sounding reference signal (SRS) resource indicated by the SRI field.
4. The method of claim 1 , wherein the mapping comprises associating the pathloss reference RS index to the power control parameter set.
5. The method of claim 1 , further comprising:
receiving second DCI for scheduling transmission of a second uplink signal, wherein the second DCI comprises a second SRI field indicating the power control parameter set;
determining, based on a second pathloss reference RS index mapped to the power control parameter set, a second transmission power for a scheduled transmission of the second uplink signal; and
transmitting the second uplink signal using the second transmission power.
6. The method of claim 1 , wherein the transmission of the uplink signal comprises a physical uplink shared channel (PUSCH) transmission.
7. The method of claim 1 , further comprising:
determining, based on the reference signal, a transmission power for a scheduled transmission of the uplink signal, wherein the transmitting the uplink signal comprises transmitting the uplink signal using the transmission power.
8. The method of claim 1 , wherein the mapping comprises replacing a second pathloss reference RS index in the power control parameter set with the pathloss reference RS index.
9. The method of claim 1 , wherein the reference signal comprises one of a synchronization signal block (SSB) or channel state information reference signal (CSI-RS).
10. A wireless device comprising:
one or more processors; and
memory storing instructions that, when executed by the one or more processors, cause the wireless device to:
based on a received medium access control (MAC) control element (CE) comprising a pathloss reference signal (RS) index indicating a reference signal, map the pathloss reference RS index to a power control parameter set;
receive downlink control information (DCI) for scheduling transmission of an uplink signal, wherein the DCI comprises a sounding reference signal resource indicator (SRI) field indicating the power control parameter set; and
transmit, based on the reference signal indicated by the pathloss reference RS index mapped to the power control parameter set, the uplink signal.
11. The wireless device of claim 10 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:
receive one or more messages comprising one or more configuration parameters indicating a plurality of power control parameter sets comprising the power control parameter set.
12. The wireless device of claim 10 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:
based on the received MAC CE, map the reference signal to spatial relation information associated with a sounding reference signal (SRS) resource indicated by the SRI field.
13. The wireless device of claim 10 , wherein the instructions, when executed by the one or more processors, cause the wireless device to map the pathloss reference RS index by associating the reference signal to the power control parameter set.
14. The wireless device of claim 10 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:
receive second DCI for scheduling transmission of a second uplink signal, wherein the second DCI comprises a second SRI field indicating the power control parameter set;
determine, based on a second pathloss reference RS index mapped to the power control parameter set, a second transmission power for a scheduled transmission of the second uplink signal; and
transmit the second uplink signal using the second transmission power.
15. The wireless device of claim 10 , wherein the transmission of the uplink signal comprises a physical uplink shared channel (PUSCH) transmission.
16. The wireless device of claim 10 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:
determine, based on the reference signal, a transmission power for a scheduled transmission of the uplink signal; and
transmit the uplink signal by transmitting the uplink signal using the transmission power.
17. The wireless device of claim 10 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:
map the pathloss reference RS index to a power control parameter set by replacing a second pathloss reference RS index in the power parameter control set with the pathloss reference RS index.
18. A non-transitory computer-readable medium storing instructions that, when executed, cause a wireless device to:
based on a received medium access control (MAC) control element (CE) comprising a pathloss reference signal (RS) index indicating a reference signal, map the pathloss reference RS index to a power control parameter set;
receive downlink control information (DCI) for scheduling transmission of an uplink signal, wherein the DCI comprises a sounding reference signal resource indicator (SRI) field indicating the power control parameter set; and
transmit, based on the reference signal indicated by the pathloss reference RS index mapped to the power control parameter set, the uplink signal.
19. The non-transitory computer-readable medium of claim 18 , wherein the instructions, when executed, cause the wireless device to:
receive one or more messages comprising one or more configuration parameters indicating a plurality of power control parameter sets comprising the power control parameter set.
20. The non-transitory computer-readable medium of claim 18 , wherein the instructions, when executed, cause the wireless device to:
based on the received MAC CE, map the reference signal to spatial relation information associated with a sounding reference signal (SRS) resource indicated by the SRI field.
21. The non-transitory computer-readable medium of claim 18 , wherein the instructions, when executed, cause the wireless device to map the pathloss reference RS index by associating the reference signal to the power control parameter set.
22. The non-transitory computer-readable medium of claim 18 , wherein the instructions, when executed, cause the wireless device to:
receive second DCI for scheduling transmission of a second uplink signal, wherein the second DCI comprises a second SRI field indicating the power control parameter set;
determine, based on a second pathloss reference RS index mapped to the power control parameter set, a second transmission power for a scheduled transmission of the second uplink signal; and
transmit the second uplink signal using the second transmission power.
23. The non-transitory computer-readable medium of claim 18 , wherein the transmission of the uplink signal comprises a physical uplink shared channel (PUSCH) transmission.
24. The non-transitory computer-readable medium of claim 18 , wherein the instructions, when executed, cause the wireless device to:
determine, based on the reference signal, a transmission power for a scheduled transmission of the uplink signal; and
transmit the uplink signal by transmitting the uplink signal using the transmission power.