Power control for wireless communications

1. A method comprising:

receiving, by a wireless device, one or more configuration parameters indicating a plurality of power control parameter sets for uplink transmission;

receiving downlink control information (DCI) scheduling transmission of a transport block, wherein the received DCI does not comprise a sounding reference signal resource indicator (SRI) field; and

based on the received DCI not comprising an SRI field, transmitting, using a transmission power, the transport block, wherein the transmission power is based on a pathloss reference signal associated with a default power control parameter set of the plurality of power control parameter sets.

2. The method of claim 1 , wherein each of the plurality of power control parameter sets is associated with at least one pathloss reference signal of a plurality of pathloss reference signals.

3. The method of claim 1 , further comprising:

receiving second DCI activating a configured uplink grant, wherein the second DCI does not comprise an SRI field;

determining, based on the second DCI not comprising an SRI field and based on the pathloss reference signal, a second transmission power of a second transport block for the configured uplink grant; and

transmitting the second transport block using the second transmission power.

4. The method of claim 1 , further comprising:

receiving a message activating at least one power control parameter set of the plurality of power control parameter sets, wherein the at least one power control parameter set comprises the default power control parameter set.

5. The method of claim 1 , wherein the received DCI is in one of DCI format 0_0 or DCI format 0_1.

6. The method of claim 1 , wherein the received DCI is in a format that does not comprise an SRI field.

7. The method of claim 1 , wherein the default power control parameter set is indicated by a lowest power control parameter set index of the plurality of power control parameter sets.

8. The method of claim 1 , wherein:

each power control parameter set of the plurality of power control parameter sets is indicated by a different index of a plurality of indices, and

the default power control parameter set is indicated by a first index of one of the plurality of the indices.

9. A method comprising:

sending, by a base station, one or more configuration parameters indicating a plurality of power control parameter sets for uplink transmission;

sending downlink control information (DCI) scheduling transmission of a transport block, wherein the DCI does not comprise a sounding reference signal resource indicator (SRI) field; and

receiving the transport block associated with a transmission power, wherein the transmission power is based on the DCI not comprising an SRI field and based on a pathloss reference signal associated with a default power control parameter set of the plurality of power control parameter sets.

10. The method of claim 9 , wherein each of the plurality of power control parameter sets is associated with at least one pathloss reference signal of a plurality of pathloss reference signals.

11. The method of claim 9 , further comprising:

sending second DCI activating a configured uplink grant, wherein the second DCI does not comprise an SRI field; and

receiving a second transport block for the configured uplink grant associated with a second transmission power, wherein the second transmission power is based on the second DCI not comprising an SRI field and based on the pathloss reference signal.

12. The method of claim 9 , further comprising:

sending a message activating at least one power control parameter set of the plurality of power control parameter sets, wherein the at least one power control parameter set comprises the default power control parameter set.

13. The method of claim 9 , wherein the DCI is in one of DCI format 0_0 or DCI format 0_1.

14. The method of claim 9 , wherein the DCI is in a format that does not comprise an SRI field.

15. The method of claim 9 , wherein the default power control parameter set is indicated by a lowest power control parameter set index of the plurality of power control parameter sets.

16. 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:

receive one or more configuration parameters indicating a plurality of power control parameter sets for uplink transmission;

receive downlink control information (DCI) scheduling transmission of a transport block, wherein the received DCI does not comprise a sounding reference signal resource indicator (SRI) field; and

based on the received DCI not comprising an SRI field, transmit, using a transmission power, the transport block, wherein the transmission power is based on a pathloss reference signal associated with a default power control parameter set of the plurality of power control parameter sets.

17. The wireless device of claim 16 , wherein each of the plurality of power control parameter sets is associated with at least one pathloss reference signal of a plurality of pathloss reference signals.

18. The wireless device of claim 16 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:

receive second DCI activating a configured uplink grant, wherein the second DCI does not comprise an SRI field;

determine, based on the second DCI not comprising an SRI field and based on the pathloss reference signal, a second transmission power of a second transport block for the configured uplink grant; and

transmit the second transport block using the second transmission power.

19. The wireless device of claim 16 , wherein the instructions, when executed by the one or more processors, cause the wireless device to: receive a message activating at least one power control parameter set of the plurality of power control parameter sets, wherein the at least one power control parameter set comprises the default power control parameter set.

20. The wireless device of claim 16 , wherein the received DCI is in one of DCI format 0_0 or DCI format 0_1.

21. The wireless device of claim 16 , wherein the received DCI is in a format that does not comprise an SRI field.

22. The wireless device of claim 16 , wherein the default power control parameter set is indicated by a lowest power control parameter set index of the plurality of power control parameter sets.

23. A base station comprising:

one or more processors; and

memory storing instructions that, when executed by the one or more processors, cause the base station to:

send one or more configuration parameters indicating a plurality of power control parameter sets for uplink transmission;

send downlink control information (DCI) scheduling transmission of a transport block, wherein the DCI does not comprise a sounding reference signal resource indicator (SRI) field; and

receive the transport block associated with a transmission power, wherein the transmission power is based on the DCI not comprising an SRI field and based on a pathloss reference signal associated with a default power control parameter set of the plurality of power control parameter sets.

24. The base station of claim 23 , wherein each of the plurality of power control parameter sets is associated with at least one pathloss reference signal of a plurality of pathloss reference signals.

25. The base station of claim 23 , wherein the instructions, when executed by the one or more processors, cause the base station to:

send second DCI activating a configured uplink grant, wherein the second DCI does not comprise an SRI field; and

receive a second transport block for the configured uplink grant associated with a second transmission power, wherein the second transmission power is based on the second DCI not comprising an SRI field and based on the pathloss reference signal.

26. The base station of claim 23 , wherein the instructions, when executed by the one or more processors, cause the base station to:

send a message activating at least one power control parameter set of the plurality of power control parameter sets, wherein the at least one power control parameter set comprises the default power control parameter set.

27. The base station of claim 23 , wherein the DCI is in one of DCI format 0_0 or DCI format 0_1.

28. The base station of claim 23 , wherein the DCI is in a format that does not comprise an SRI field.

29. The base station of claim 23 , wherein the default power control parameter set is indicated by a lowest power control parameter set index of the plurality of power control parameter sets.