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 uplink preemption is supported; and

after sending the capability parameter indicating that uplink preemption is supported, receiving downlink control information (DCI) that indicates uplink preemption of at least one uplink resource.

2. The method of claim 1 , wherein:

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

the sending the capability parameter comprises sending the capability parameter to the base station; and

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

3. The method of claim 1 , further comprising:

receiving DCI that indicates downlink preemption of at least one downlink resource.

4. The method of claim 1 , further comprising:

based on the DCI:

canceling a scheduled transmission of a second message; and

sending a third message.

5. 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.

6. The method of claim 1 , further comprising:

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

7. The method of claim 1 , further comprising:

determining, based on a radio network temporary identifier (RNTI) associated with uplink preemption, that the DCI indicates uplink preemption; and

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

8. 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 preemption 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.

9. The method of claim 1 , further comprising:

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

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

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 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 uplink preemption is supported; and

after receiving the capability parameter indicating that uplink preemption is supported, sending downlink control information (DCI) that indicates uplink preemption of at least one uplink resource.

12. The method of claim 11 , wherein:

the sending the request comprises sending the request to the wireless device;

the receiving the capability parameter comprises receiving the capability parameter from the wireless device; and

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

13. The method of claim 11 , further comprising:

sending DCI that indicates downlink preemption of at least one downlink resource.

14. The method of claim 11 , further comprising:

based on the DCI:

canceling a scheduled reception of a second message; and

receiving a third message.

15. 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.

16. The method of claim 11 , further comprising:

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

17. The method of claim 11 , further comprising:

scrambling, based on a radio network temporary identifier (RNTI) associated with uplink preemption, the DCI; and

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

18. 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 preemption 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.

19. The method of claim 11 , further comprising:

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

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

20. The method of claim 11 , further comprising:

based on the DCI, delaying a scheduled reception of a second message.

21. 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 a request for at least one capability parameter of the wireless device;

send, based on the request, a capability parameter indicating that uplink preemption is supported; and

after sending the capability parameter indicating that uplink preemption is supported, receive downlink control information (DCI) that indicates uplink preemption of at least one uplink resource.

22. The wireless device of claim 21 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:

receive the request by receiving the request from a base station;

send the capability parameter by sending the capability parameter to the base station; and

receive the DCI by receiving the DCI from the base station.

23. The wireless device of claim 21 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:

receive DCI that indicates downlink preemption of at least one downlink resource.

24. The wireless device of claim 21 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:

based on the DCI:

cancel a scheduled transmission of a second message; and

send a third message.

25. The wireless device of claim 21 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:

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

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

26. The wireless device of claim 21 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:

send, based on the request, a second capability parameter indicating that downlink preemption is supported.

27. The wireless device of claim 21 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:

determine, based on a radio network temporary identifier (RNTI) associated with uplink preemption, that the DCI indicates uplink preemption; and

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

28. The wireless device of claim 21 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:

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

receive, 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 preemption 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.

29. The wireless device of claim 21 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:

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

skip, based on the DCI that indicates downlink preemption, reception of a first downlink message via the at least one downlink resource.

30. The wireless device of claim 21 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:

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

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

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

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

31. 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 a request for at least one capability parameter of a wireless device;

receive, based on the request, a capability parameter indicating that uplink preemption is supported; and

after receiving the capability parameter indicating that uplink preemption is supported, send downlink control information (DCI) that indicates uplink preemption of at least one uplink resource.

32. The base station of claim 31 , wherein the instructions, when executed by the one or more processors, cause the base station to:

send the request by sending the request to the wireless device;

receive the capability parameter by receiving the capability parameter from the wireless device; and

send the DCI by sending the DCI to the wireless device.

33. The base station of claim 31 , wherein the instructions, when executed by the one or more processors, cause the base station to:

send DCI that indicates downlink preemption of at least one downlink resource.

34. The base station of claim 31 , wherein the instructions, when executed by the one or more processors, cause the base station to:

based on the DCI:

cancel a scheduled reception of a second message; and

receive a third message.

35. The base station of claim 31 , wherein the instructions, when executed by the one or more processors, cause the base station to:

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

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

36. The base station of claim 31 , wherein the instructions, when executed by the one or more processors, cause the base station to:

receive, based on the request, a second capability parameter indicating that downlink preemption is supported.

37. The base station of claim 31 , wherein the instructions, when executed by the one or more processors, cause the base station to:

scramble, based on a radio network temporary identifier (RNTI) associated with uplink preemption, the DCI; and

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

38. The base station of claim 31 , wherein the instructions, when executed by the one or more processors, cause the base station to:

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

send, 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 preemption 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.

39. The base station of claim 31 , wherein the instructions, when executed by the one or more processors, cause the base station to:

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

skip, based on the DCI that indicates downlink preemption, transmission of a first downlink message via the at least one downlink resource.

40. The base station of claim 31 , wherein the instructions, when executed by the one or more processors, cause the base station to:

based on the DCI, delay a scheduled reception of a second message.

41. A non-transitory computer-readable medium storing instructions that, when executed, configure a wireless device to:

receive a request for at least one capability parameter of the wireless device;

send, based on the request, a capability parameter indicating that uplink preemption is supported; and

after sending the capability parameter indicating that uplink preemption is supported, receive downlink control information (DCI) that indicates uplink preemption of at least one uplink resource.

42. The non-transitory computer-readable medium of claim 41 , wherein the instructions, when executed, further configure the wireless device to:

receive the request by receiving the request from a base station;

send the capability parameter by sending the capability parameter to the base station; and

receive the DCI by receiving the DCI from the base station.

43. The non-transitory computer-readable medium of claim 41 , wherein the instructions, when executed, further configure the wireless device to:

receive DCI that indicates downlink preemption of at least one downlink resource.

44. The non-transitory computer-readable medium of claim 41 , wherein the instructions, when executed, further configure the wireless device to:

based on the DCI:

cancel a scheduled transmission of a second message; and

send a third message.

45. The non-transitory computer-readable medium of claim 41 , wherein the instructions, when executed, further configure the wireless device to:

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

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

46. The non-transitory computer-readable medium of claim 41 , wherein the instructions, when executed, further configure the wireless device to:

send, based on the request, a second capability parameter indicating that downlink preemption is supported.

47. The non-transitory computer-readable medium of claim 41 , wherein the instructions, when executed, further configure the wireless device to:

determine, based on a radio network temporary identifier (RNTI) associated with uplink preemption, that the DCI indicates uplink preemption; and

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

48. The non-transitory computer-readable medium of claim 41 , wherein the instructions, when executed, further configure the wireless device to:

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

receive, 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 preemption 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.

49. The non-transitory computer-readable medium of claim 41 , wherein the instructions, when executed, further configure the wireless device to:

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

skip, based on the DCI that indicates downlink preemption, reception of a first downlink message via the at least one downlink resource.

50. The non-transitory computer-readable medium of claim 41 , wherein the instructions, when executed, further configure the wireless device to:

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

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

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

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

51. A non-transitory computer-readable medium storing instructions that, when executed, configure a base station to:

send a request for at least one capability parameter of a wireless device;

receive, based on the request, a capability parameter indicating that uplink preemption is supported; and

after receiving the capability parameter indicating that uplink preemption is supported, send downlink control information (DCI) that indicates uplink preemption of at least one uplink resource.

52. The non-transitory computer-readable medium of claim 51 , wherein the instructions, when executed, further configure the base station to:

send the request by sending the request to the wireless device;

receive the capability parameter by receiving the capability parameter from the wireless device; and

send the DCI by sending the DCI to the wireless device.

53. The non-transitory computer-readable medium of claim 51 , wherein the instructions, when executed, further configure the base station to:

send DCI that indicates downlink preemption of at least one downlink resource.

54. The non-transitory computer-readable medium of claim 51 , wherein the instructions, when executed, further configure the base station to:

based on the DCI:

cancel a scheduled reception of a second message; and

receive a third message.

55. The non-transitory computer-readable medium of claim 51 , wherein the instructions, when executed, further configure the base station to:

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

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

56. The non-transitory computer-readable medium of claim 51 , wherein the instructions, when executed, further configure the base station to:

receive, based on the request, a second capability parameter indicating that downlink preemption is supported.

57. The non-transitory computer-readable medium of claim 51 , wherein the instructions, when executed, further configure the base station to:

scramble, based on a radio network temporary identifier (RNTI) associated with uplink preemption, the DCI; and

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

58. The non-transitory computer-readable medium of claim 51 , wherein the instructions, when executed, further configure the base station to:

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

send, 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 preemption 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.

59. The non-transitory computer-readable medium of claim 51 , wherein the instructions, when executed, further configure the base station to:

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

skip, based on the DCI that indicates downlink preemption, transmission of a first downlink message via the at least one downlink resource.

60. The non-transitory computer-readable medium of claim 51 , wherein the instructions, when executed, further configure the base station to:

based on the DCI, delay a scheduled reception of a second message.

61. A system comprising:

a base station; and

a wireless device;

wherein the base station is configured to:

send a request for at least one capability parameter of the wireless device; and

wherein the wireless device is configured to:

send, based on the request, a capability parameter indicating that uplink preemption is supported; and

after sending the capability parameter indicating that uplink preemption is supported, receive downlink control information (DCI) that indicates uplink preemption of at least one uplink resource.

62. The system of claim 61 , wherein the wireless device is further configured to:

receive the request by receiving the request from the base station;

send the capability parameter by sending the capability parameter to the base station; and

receive the DCI by receiving the DCI from the base station.

63. The system of claim 61 , wherein the wireless device is further configured to:

receive DCI that indicates downlink preemption of at least one downlink resource.

64. The system of claim 61 , wherein the wireless device is further configured to:

based on the DCI:

cancel a scheduled transmission of a second message; and

send a third message.

65. The system of claim 61 , wherein the wireless device is further configured to:

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

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

66. The system of claim 61 , wherein the wireless device is further configured to:

send, based on the request, a second capability parameter indicating that downlink preemption is supported.

67. The system of claim 61 , wherein the wireless device is further configured to:

determine, based on a radio network temporary identifier (RNTI) associated with uplink preemption, that the DCI indicates uplink preemption; and

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

68. The system of claim 61 , wherein the wireless device is further configured to:

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

receive, 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 preemption 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.

69. The system of claim 61 , wherein the wireless device is further configured to:

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

skip, based on the DCI that indicates downlink preemption, reception of a first downlink message via the at least one downlink resource.

70. The system of claim 61 , wherein the wireless device is further configured to:

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

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

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

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

71. The system of claim 61 , wherein the base station is further configured to:

based on the DCI, delay a scheduled reception of a second message.