Wireless communications for uplink preemption and downlink preemption

1. A method comprising:

sending, by a wireless device, a capability message comprising:

a first capability parameter indicating that downlink preemption is supported; and

a second capability parameter indicating that uplink preemption is supported;

receiving a control message comprising:

based on the first capability parameter, a first radio network temporary identifier (RNTI) for reception of a downlink preemption indication; and

based on the second capability parameter, a second RNTI for reception of an uplink preemption indication; and

receiving, based on the first RNTI or the second RNTI, downlink control information (DCI) indicating a preemption indication for at least one of a downlink preemption or an uplink preemption.

2. The method of claim 1 , further comprising:

determining, based on the first RNTI or the second RNTI, whether the preemption indication is for a downlink preemption or an uplink preemption; and

based on determining that the preemption indication is for an uplink preemption;

canceling a scheduled transmission of a second message; and

sending a third message.

3. The method of claim 1 , further comprising:

receiving, by the wireless device, a capability request comprising a request for radio access capability parameters,

wherein the sending the capability message is based on the capability request, and wherein the radio access capability parameters comprise the first capability parameter and the second capability parameter.

4. The method of claim 1 , wherein the preemption indication comprises a first downlink preemption indication, and wherein the DCI comprises cyclic redundancy check bits that are scrambled with the first RNTI.

5. The method of claim 1 , wherein the preemption indication comprises a first uplink preemption indication, and wherein the DCI comprises cyclic redundancy check bits that are scrambled with the second RNTI.

6. The method of claim 1 , further comprising monitoring a downlink control channel for a first downlink preemption indication based on:

the first RNTI; and

at least one of:

a downlink radio resource;

a control resource set;

a search space; or

a periodicity.

7. The method of claim 1 , further comprising:

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

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

puncturing, based on the preemption indication indicating the first downlink radio resource is preempted, the first portion of the data packet; and

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

8. A method comprising:

sending, by a wireless device, a capability message comprising at least one indication indicating whether the wireless device supports downlink preemption and whether the wireless device supports uplink preemption;

receiving, by the wireless device and after sending the capability message, a first message comprising at least one of:

a first radio network temporary identifier (RNTI) for reception of a downlink preemption indication; or

a second RNTI for reception of an uplink preemption indication;

receiving downlink control information (DCI) indicating a preemption indication for at least one of a downlink preemption or an uplink preemption;

determining, based on the first RNTI or the second RNTI, whether the preemption indication is for a downlink preemption or an uplink preemption; and

determining, based on the determining whether the preemption indication is for a downlink preemption or an uplink preemption, that a downlink resource or an uplink resource is preempted.

9. The method of claim 8 , wherein the at least one indication indicating whether the wireless device supports downlink preemption and whether the wireless device supports uplink preemption comprises:

a first capability parameter indicating that downlink preemption is supported; and

a second capability parameter indicating that uplink preemption is supported.

10. The method of claim 9 , further comprising:

receiving, by the wireless device, a capability request comprising a request for radio access capability parameters,

wherein the sending the capability message is based on the capability request, and wherein the radio access capability parameters comprise the first capability parameter and the second capability parameter.

11. The method of claim 8 , further comprising puncturing at least a portion of a data packet associated with the downlink resource, wherein the DCI is received based on the first RNTI.

12. The method of claim 8 , further comprising:

determining, for a second message, one or more uplink resources previously configured for a third message; and

sending, via the one or more uplink resources, the second message,

wherein the DCI is received based on the second RNTI.

13. The method of claim 12 , wherein the third message is an enhanced mobile broadband (eMBB) message, and wherein the second message is an ultra reliable low latency (URLLC) message.

14. A method comprising:

receiving, by a wireless device, a capability request message comprising a request for radio access capability parameters;

sending, based on the capability request message, a capability response message comprising the radio access capability parameters, wherein the radio access capability parameters comprise:

a first capability parameter indicating that downlink preemption is supported; and

a second capability parameter indicating that uplink preemption is supported; and

receiving a control message comprising:

based on the first capability parameter, a first radio network temporary identifier (RNTI) for reception of a downlink preemption indication; and

based on the second capability parameter, a second RNTI for reception of an uplink preemption indication.

15. The method of claim 14 , further comprising:

receiving, based on the first RNTI or the second RNTI, downlink control information (DCI) indicating a preemption indication for at least one of a downlink preemption or an uplink preemption.

16. The method of claim 14 , further comprising:

determining, based on the first RNTI or the second RNTI, whether a first preemption indication is for a downlink preemption or an uplink preemption; and

based on determining that the first preemption indication is for an uplink preemption;

canceling a scheduled transmission of a second messageh; and

sending a third message.

17. The method of claim 14 , further comprising:

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

based on a first uplink preemption indication indicating a second uplink radio resource is preempted, determining not to send a second portion of the uplink data packet.

18. The method of claim 14 , wherein:

the receiving the capability request message comprises receiving the capability request message from a base station;

the sending the capability response message comprises sending the capability response message to the base station; and

the receiving the control message comprises receiving the control message from the base station.

19. The method of claim 1 , wherein:

the sending the capability message comprises sending the capability message to a base station; and

the receiving the control message comprises receiving the control message from the base station.

20. The method of claim 8 , wherein:

the sending the capability message comprises sending the capability message to a base station; and

the receiving the first message comprises receiving the first message from the base station.

21. The method of claim 8 , wherein the at least one indication indicating whether the wireless device supports downlink preemption and whether the wireless device supports uplink preemption comprises a capability parameter indicating that downlink preemption is supported; and

wherein the at least one indication indicating whether the wireless device supports downlink preemption and whether the wireless device supports uplink preemption indicates that uplink preemption is not supported.

22. The method of claim 21 , wherein the first message comprises the first RNTI and does not comprise the second RNTI.

23. The method of claim 8 , wherein the at least one indication indicating whether the wireless device supports downlink preemption and whether the wireless device supports uplink preemption comprises a capability parameter indicating that uplink preemption is supported; and

wherein the at least one indication indicating whether the wireless device supports downlink preemption and whether the wireless device supports uplink preemption indicates that downlink preemption is not supported.

24. The method of claim 23 , wherein the first message comprises the second RNTI and does not comprise the first RNTI.