Method and device for power control in wireless communication

1 . A user equipment (UE) configured for wireless communications, the UE comprising:

a receiver;

a transmitter; and

a processor, wherein:

the receiver is configured to receive a first information block;

the receiver is further configured to receive a downlink control information (DCI), wherein a format of the DCI is based on the first information block, wherein the DCI comprises at least a first field and a second field;

the processor is configured to determine a target waveform, wherein the target waveform is from a plurality of candidate waveforms, wherein the target waveform is determined based on a value of the first field comprised in the DCI; and

the transmitter is configured to send a physical uplink shared channel (PUSCH) transmission, using the determined target waveform, and using a target power value, wherein

the target power value is equal to a smaller value between of a first upper limit value or a first power value, wherein a first parameter value is used to determine the first upper limit value, wherein the first parameter value is related to the target waveform, wherein a second parameter value is used to determine the first power value, and wherein the second parameter value is related to both a value of the second field comprised in the DCI and the target waveform.

2 . The UE of claim 1 , wherein the value of the second field comprised in the DCI is used to determine a bit per resource element (BPRE) value of the PUSCH transmission, wherein the first power value is linearly correlated with the second parameter value, and wherein a unit of the first power value is dBm, wherein a characteristic sub-parameter value and the BPRE value of the PUSCH transmission are both used to determine the second parameter value, wherein the characteristic sub-parameter value belongs to a first sub-parameter value set, wherein the first sub-parameter value set comprises at least one sub-parameter value, wherein the first sub-parameter value set is predefined or configured, and wherein the target waveform is used to determine the characteristic sub-parameter value from the first sub-parameter value set.

3 . The UE of claim 1 , wherein the DCI is used to determine a target offset value, wherein the target waveform is used to determine a power control adjustment state for the PUSCH transmission, wherein the target offset value belongs to a first offset value set, wherein the first offset value set comprises at least one offset value, wherein any offset value comprised in the first offset value set is for a power control adjustment state for the PUSCH transmission, and wherein a sum of all offset values comprised in the first offset value set is used to determine the second parameter value.

4 . The UE of claim 1 , wherein the PUSCH transmission carries a report, wherein the report is used to indicate a difference value between the first upper limit value and the target power value, and wherein the DCI is an earliest DCI after the report is triggered.

5 . The UE of claim 1 , wherein the DCI comprises a third field, wherein a target size is equal to a size of the third field comprised in the DCI, and wherein the target size is equal to a maximum candidate size among multiple candidate sizes corresponding to the plurality of candidate waveforms.

6 . The UE of claim 1 , wherein the receiver is further configured to receive a second information block, wherein the second information block is used to determine a reference waveform, wherein the reference waveform is one of the plurality of candidate waveforms, and wherein the reference waveform is a default waveform used for an uplink transmission when the first field is absent.

7 . The UE of claim 1 , wherein a modulation and coding scheme (MCS) used by the PUSCH transmission belongs to an MCS set, wherein the MCS set comprises multiple MCSs, wherein the DCI is used to determine an MCS used by the PUSCH transmission from the MCS set, and wherein the target waveform is used to determine the MCS set.

8 . A method for use in a user equipment (UE) configured for wireless communications, the method comprising:

receiving a first information block;

receiving a downlink control information (DCI), wherein a format of the DCI is based on the first information block, wherein the DCI comprises at least a first field and a second field;

determining a target waveform, wherein the target waveform is from a plurality of candidate waveforms, wherein the target waveform is determined based on a value of the first field comprised in the DCI; and

sending a physical uplink shared channel (PUSCH) transmission, using the determined target waveform, and using a target power value, wherein

the target power value is equal to a smaller value of a first upper limit value or a first power value, wherein a first parameter value is used to determine the first upper limit value, wherein the first parameter value is related to the target waveform, wherein a second parameter value is used to determine the first power value, and wherein the second parameter value is related to both a value of the second field comprised in the DCI and the target waveform.

9 . The method of claim 8 , wherein the value of the second field comprised in the DCI is used to determine a bit per resource element (BPRE) value of the PUSCH transmission, wherein the first power value is linearly correlated with the second parameter value, wherein a unit of the first power value is dBm, wherein a characteristic sub-parameter value and the BPRE value of the PUSCH transmission are both used to determine the second parameter value, wherein the characteristic sub-parameter value belongs to a first sub-parameter value set, wherein the first sub-parameter value set comprises at least one sub-parameter value, wherein the first sub-parameter value set is predefined or configured, and wherein the target waveform is used to determine the characteristic sub-parameter value from the first sub-parameter value set.

10 . The method of claim 8 , wherein the DCI is used to determine a target offset value, wherein the target waveform is used to determine a power control adjustment state for the PUSCH transmission, wherein the target offset value belongs to a first offset value set, wherein the first offset value set comprises at least one offset value, wherein any offset value comprised in the first offset value set is for a power control adjustment state for the PUSCH transmission, and wherein a sum of all offset values comprised in the first offset value set is used to determine the second parameter value.

11 . The method of claim 8 , wherein the PUSCH transmission carries a report, wherein the report is used to indicate a difference value between the first upper limit value and the target power value, and wherein the DCI is an earliest DCI after the first report is triggered.

12 . The method of claim 8 , wherein the DCI comprises a third field, wherein a target size is equal to a size of the third field comprised in the DCI, and wherein the target size is equal to a maximum candidate size among multiple candidate sizes corresponding to the plurality of candidate waveforms.

13 . The method of claim 8 , further comprising:

receiving a second information block, wherein the second information block is used to determine a reference waveform, wherein the reference waveform is one of the plurality of candidate waveforms, and wherein the reference waveform is a default waveform used for an uplink transmission when the first field is absent.

14 . The method of claim 8 , wherein a modulation and coding scheme (MCS) used by the PUSCH transmission belongs to an MCS set, wherein the MCS set comprises multiple MCSs, wherein the DCI is used to determine an MCS used by the PUSCH transmission from the MCS set, and wherein the target waveform is used to determine the MCS set.