Wireless communications for uplink preemption

1. A method comprising:

receiving, by a wireless device, a request for at least one capability parameter of the wireless device;

sending, based on the request, a capability parameter indicating that cancelation of uplink transmission is supported; and

after sending the capability parameter, receiving downlink control information (DCI) comprising one or more uplink cancelation indicators that indicate at least one of:

stopping uplink transmission; or

canceling scheduled uplink transmission.

2. The method of claim 1 , wherein the one or more uplink cancelation indicators further indicate at least one uplink resource is preempted for another wireless device.

3. The method of claim 1 , wherein the DCI further comprises one or more uplink suspension indicators that indicate suspending uplink transmission.

4. The method of claim 1 , further comprising:

receiving a radio resource control (RRC) message comprising a configuration of uplink cancelation indication of a DCI format associated with uplink cancelation, wherein the configuration of uplink cancelation indication indicates an association between each uplink cancelation indicator of the DCI and a cell of a plurality of cells, and

wherein the one or more uplink cancelation indicators comprises:

a first uplink cancelation indicator associated with a first cell of the plurality of cells; and

a second uplink cancelation indicator associated with a second cell of the plurality of cells.

5. The method of claim 1 , wherein:

the receiving the request comprises receiving the request from a base station via a first radio resource control (RRC) message;

the sending the capability parameter comprises sending the capability parameter to the base station via a second RRC message; and

the receiving the DCI comprises receiving the DCI from the base station.

6. The method of claim 1 , further comprising:

sending, via an uplink shared channel, a first portion of uplink data; and

based on the DCI, not sending a second portion of the uplink data.

7. The method of claim 1 , further comprising:

sending, based on the request, a second capability parameter indicating that downlink preemption is supported;

receiving second DCI that indicates downlink preemption of at least one downlink resource; and

skipping, based on the second DCI, reception of a first downlink message via the at least one downlink resource.

8. The method of claim 1 , further comprising:

receiving a radio resource control (RRC) message comprising:

a radio network temporary identifier (RNTI) associated with uplink cancelation; and

a configuration of uplink cancelation indication of a DCI format associated with uplink cancelation;

determining, based on the RNTI associated with uplink cancelation, that the DCI indicates uplink cancelation; and

skipping, based on the determining that the DCI indicates uplink cancelation, transmission of a first uplink message via at least one uplink resource.

9. The method of claim 1 , further comprising:

sending, based on the request, a second capability parameter indicating that downlink preemption is not supported, and

receiving, after sending the capability parameter and the second capability parameter, a control message comprising a first radio network temporary identifier (RNTI) for reception of an uplink cancelation indication, wherein the control message does not comprise a second RNTI for reception of a downlink preemption indication, and wherein the control message indicates at least one control channel parameter, for receiving the DCI, comprising at least one of:

a control resource set; or

a search space.

10. The method of claim 1 , further comprising:

receiving, via a first downlink radio resource of a downlink shared channel, a first data packet;

receiving, via a second downlink radio resource of the downlink shared channel, a second data packet;

puncturing, based on second DCI indicating that the first downlink radio resource is preempted, the first data packet; and

decoding, based on the second downlink radio resource being not preempted, the second data packet.

11. A method comprising:

sending, by a base station, a request for at least one capability parameter of a wireless device;

receiving, based on the request, a capability parameter indicating that cancelation of uplink transmission is supported; and

after receiving the capability parameter, sending downlink control information (DCI) comprising one or more uplink cancelation indicators that indicate at least one of:

stopping uplink transmission; or

canceling scheduled uplink transmission.

12. The method of claim 11 , wherein the one or more uplink cancelation indicators further indicate at least one uplink resource is preempted for another wireless device.

13. The method of claim 11 , wherein the DCI further comprises one or more uplink suspension indicators that indicate suspending uplink transmission.

14. The method of claim 11 , further comprising:

sending a radio resource control (RRC) message comprising a configuration of uplink cancelation indication of a DCI format associated with uplink cancelation, wherein the configuration of uplink cancelation indication indicates an association between each uplink cancelation indicator of the DCI and a cell of a plurality of cells, and

wherein the one or more uplink cancelation indicators comprises:

a first uplink cancelation indicator associated with a first cell of the plurality of cells; and

a second uplink cancelation indicator associated with a second cell of the plurality of cells.

15. The method of claim 11 , wherein:

the sending the request comprises sending the request to the wireless device via a first radio resource control (RRC) message;

the receiving the capability parameter comprises receiving the capability parameter from the wireless device via a second RRC message; and

the sending the DCI comprises sending the DCI to the wireless device.

16. The method of claim 11 , further comprising:

receiving, via an uplink shared channel, a first portion of uplink data; and

based on the DCI, determining to skip reception of a second portion of the uplink data.

17. The method of claim 11 , further comprising:

receiving, based on the request, a second capability parameter indicating that downlink preemption is supported;

sending second DCI that indicates downlink preemption of at least one downlink resource; and

skipping, based on the second DCI, transmission of a first downlink message via the at least one downlink resource.

18. The method of claim 11 , further comprising:

sending a radio resource control (RRC) message comprising:

a radio network temporary identifier (RNTI) associated with uplink cancelation; and

a configuration of uplink cancelation indication of a DCI format associated with uplink cancelation;

scrambling, based on the RNTI associated with uplink cancelation, the DCI; and

skipping reception of a first uplink message via at least one uplink resource.

19. The method of claim 11 , further comprising:

receiving, based on the request, a second capability parameter indicating that downlink preemption is not supported, and

sending, after receiving the capability parameter and the second capability parameter, a control message comprising a first radio network temporary identifier (RNTI) for reception of an uplink cancelation indication, wherein the control message does not comprise a second RNTI for reception of a downlink preemption indication, and wherein the control message indicates at least one control channel parameter, for receiving the DCI, comprising at least one of:

a control resource set; or

a search space.

20. The method of claim 11 , further comprising:

based on one or more uplink suspension indicators of the DCI, delaying a scheduled reception of a second message.