Activation of grant-free transmission

1. 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, from a base station, at least one radio resource control message comprising one or more configuration parameters of a cell, wherein the one or more configuration parameters indicate grant-free uplink radio resources associated with the cell;

receive, after receiving the at least one radio resource control message, a medium access control (MAC) control element (CE) indicating an activation of the cell;

based on receiving the MAC CE, activate the cell;

based on receiving the MAC CE, activate the grant-free uplink radio resources; and

send, via the grant-free uplink radio resources, one or more data packets.

2. The wireless device of claim 1 , wherein the instructions, when executed by the one or more processors, cause the wireless device to send the one or more data packets to the base station.

3. The wireless device of claim 1 , wherein the cell comprises a secondary cell.

4. The wireless device of claim 1 , wherein the one or more configuration parameters further indicate at least one of:

demodulation reference signal configuration parameters;

a radio network temporary identifier; or

a preamble identifier.

5. The wireless device of claim 1 , wherein the instructions, when executed by the one or more processors, cause the wireless device to send the one or more data packets according to a modulation and coding scheme, wherein the one or more configuration parameters comprise the modulation and coding scheme.

6. The wireless device of claim 1 , wherein the instructions, when executed by the one or more processors, cause the wireless device to send, based on a quantity of permitted repeat transmissions, the one or more data packets, wherein the one or more configuration parameters comprise the quantity of permitted repeat transmissions for the one or more data packets.

7. The wireless device of claim 1 , wherein the one or more configuration parameters further comprise at least one of:

an indication that the grant-free uplink radio resources associated with the cell are activated based on receiving the at least one radio resource control message; or

an indication that the grant-free uplink radio resources associated with the cell are activated based on receiving a control signal from the base station.

8. The wireless device of claim 7 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:

receive, via a downlink control channel, the control signal; and

activate the grant-free uplink radio resources by activating the grant-free uplink radio resources based on receiving the control signal.

9. The wireless device of claim 7 , wherein the control signal is scrambled by a radio network temporary identifier.

10. The wireless device of claim 7 , wherein the instructions, when executed by the one or more processors, cause the wireless device to send, based on receiving the control signal, an acknowledgement.

11. The wireless device of claim 1 , wherein the instructions, when executed by the one or more processors, cause the wireless device to receive a response message associated with the one or more data packets, wherein the response message comprises downlink control information.

12. The wireless device of claim 1 , wherein the instructions, when executed by the one or more processors, cause the wireless device to:

determine an expiry of a time alignment timer of a cell group comprising the cell;

clear, based on the expiry of the time alignment timer, the grant-free uplink radio resources;

receive a timing advance command associated with the cell group;

re-activate, based on receiving the timing advance command, the grant-free uplink radio resources; and

send, via the re-activated grant-free uplink radio resources, one or more second data packets.

13. 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, from a base station, at least one radio resource control message comprising one or more configuration parameters of a cell, wherein the one or more configuration parameters indicate grant-free uplink radio resources associated with the cell;

activate, based on receiving the at least one radio resource control message, the grant-free uplink radio resources;

determine an expiry of a time alignment timer of a cell group comprising the cell;

clear, based on the expiry of the time alignment timer, the grant-free uplink radio resources;

receive a timing advance command associated with the cell group;

re-activate, based on receiving the timing advance command, the grant-free uplink radio resources; and

send, via the re-activated grant-free uplink radio resources, one or more data packets.

14. The wireless device of claim 13 , wherein the one or more configuration parameters further indicate at least one of:

demodulation reference signal configuration parameters;

a radio network temporary identifier; or

a preamble identifier.

15. The wireless device of claim 13 , wherein the instructions, when executed by the one or more processors, cause the wireless device to send the one or more data packets according to a modulation and coding scheme, wherein the one or more configuration parameters comprise the modulation and coding scheme.

16. The wireless device of claim 13 , wherein the instructions, when executed by the one or more processors, cause the wireless device to send, based on a quantity of permitted repeat transmissions, the one or more data packets, wherein the one or more configuration parameters comprise the quantity of permitted repeat transmissions for the one or more data packets.

17. The wireless device of claim 13 , wherein the instructions, when executed by the one or more processors, cause the wireless device to receive a response message associated with the one or more data packets, wherein the response message comprises downlink control information.

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

receive, from a base station, at least one radio resource control message comprising one or more configuration parameters of a cell, wherein the one or more configuration parameters indicate grant-free uplink radio resources associated with the cell;

receive, after receiving the at least one radio resource control message, a medium access control (MAC) control element (CE) indicating an activation of the cell;

based on receiving the MAC CE, activate the cell;

based on receiving the MAC CE, activate the grant-free uplink radio resources; and

send, via the grant-free uplink radio resources, one or more data packets.

19. The non-transitory computer-readable medium of claim 18 , wherein the instructions, when executed, configure the wireless device to send the one or more data packets to the base station.

20. The non-transitory computer-readable medium of claim 18 , wherein the cell comprises a secondary cell.

21. The non-transitory computer-readable medium of claim 18 , wherein the one or more configuration parameters further indicate at least one of:

demodulation reference signal configuration parameters;

a radio network temporary identifier; or

a preamble identifier.

22. The non-transitory computer-readable medium of claim 18 , wherein the instructions, when executed, configure the wireless device to send the one or more data packets according to a modulation and coding scheme, wherein the one or more configuration parameters comprise the modulation and coding scheme.

23. The non-transitory computer-readable medium of claim 18 , wherein the instructions, when executed, configure the wireless device to send, based on a quantity of permitted repeat transmissions, the one or more data packets, wherein the one or more configuration parameters comprise the quantity of permitted repeat transmissions for the one or more data packets.

24. The non-transitory computer-readable medium of claim 18 , wherein the one or more configuration parameters further comprise at least one of:

an indication that the grant-free uplink radio resources associated with the cell are activated based on receiving the at least one radio resource control message; or

an indication that the grant-free uplink radio resources associated with the cell are activated based on receiving a control signal from the base station.

25. The non-transitory computer-readable medium of claim 24 , wherein the instructions, when executed, configure the wireless device to:

receive, via a downlink control channel, the control signal; and

activate the grant-free uplink radio resources by activating the grant-free uplink radio resources based on receiving the control signal.

26. The non-transitory computer-readable medium of claim 24 , wherein the control signal is scrambled by a radio network temporary identifier.

27. The non-transitory computer-readable medium of claim 24 , wherein the instructions, when executed, configure the wireless device to send, based on receiving the control signal, an acknowledgement.

28. The non-transitory computer-readable medium of claim 18 , wherein the instructions, when executed, configure the wireless device to receive a response message associated with the one or more data packets, wherein the response message comprises downlink control information.

29. The non-transitory computer-readable medium of claim 18 , wherein the instructions, when executed, configure the wireless device to:

determine an expiry of a time alignment timer of a cell group comprising the cell;

clear, based on the expiry of the time alignment timer, the grant-free uplink radio resources;

receive a timing advance command associated with the cell group;

re-activate, based on receiving the timing advance command, the grant-free uplink radio resources; and

send, via the re-activated grant-free uplink radio resources, one or more second data packets.

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

receive, from a base station, at least one radio resource control message comprising one or more configuration parameters of a cell, wherein the one or more configuration parameters indicate grant-free uplink radio resources associated with the cell;

activate, based on receiving the at least one radio resource control message, the grant-free uplink radio resources;

determine an expiry of a time alignment timer of a cell group comprising the cell;

clear, based on the expiry of the time alignment timer, the grant-free uplink radio resources;

receive a timing advance command associated with the cell group;

re-activate, based on receiving the timing advance command, the grant-free uplink radio resources; and

send, via the re-activated grant-free uplink radio resources, one or more data packets.

31. The non-transitory computer-readable medium of claim 30 , wherein the one or more configuration parameters further indicate at least one of:

demodulation reference signal configuration parameters;

a radio network temporary identifier; or

a preamble identifier.

32. The non-transitory computer-readable medium of claim 30 , wherein the instructions, when executed, configure the wireless device to send the one or more data packets according to a modulation and coding scheme, wherein the one or more configuration parameters comprise the modulation and coding scheme.

33. The non-transitory computer-readable medium of claim 30 , wherein the instructions, when executed, configure the wireless device to send, based on a quantity of permitted repeat transmissions, the one or more data packets, wherein the one or more configuration parameters comprise the quantity of permitted repeat transmissions for the one or more data packets.

34. The non-transitory computer-readable medium of claim 30 , wherein the instructions, when executed, configure the wireless device to receive a response message associated with the one or more data packets, wherein the response message comprises downlink control information.

35. A system comprising:

a wireless device; and

a base station;

wherein the wireless device is configured to:

receive, from the base station, at least one radio resource control message comprising one or more configuration parameters of a cell, wherein the one or more configuration parameters indicate grant-free uplink radio resources associated with the cell;

receive, after receiving the at least one radio resource control message, a medium access control (MAC) control element (CE) indicating an activation of the cell;

based on receiving the MAC CE, activate the cell;

based on receiving the MAC CE, activate the grant-free uplink radio resources; and

send, via the grant-free uplink radio resources, one or more data packets;

wherein the base station is configured to:

send, to the wireless device, the at least one radio resource control message comprising the one or more configuration parameters;

send, after sending the at least one radio resource control message, a medium access control (MAC) control element (CE) indicating an activation of the cell; and

receive, via the grant-free uplink radio resources, the one or more data packets.

36. The system of claim 35 , wherein the cell comprises a secondary cell.

37. The system of claim 35 , wherein the one or more configuration parameters further indicate at least one of:

demodulation reference signal configuration parameters;

a radio network temporary identifier; or

a preamble identifier.

38. The system of claim 35 , wherein the wireless device is configured to send the one or more data packets according to a modulation and coding scheme, wherein the one or more configuration parameters comprise the modulation and coding scheme.

39. The system of claim 35 , wherein the wireless device is configured to send, based on a quantity of permitted repeat transmissions, the one or more data packets, wherein the one or more configuration parameters comprise the quantity of permitted repeat transmissions for the one or more data packets.

40. The system of claim 35 , wherein the one or more configuration parameters further comprise at least one of:

an indication that the grant-free uplink radio resources associated with the cell are activated based on receiving the at least one radio resource control message; or

an indication that the grant-free uplink radio resources associated with the cell are activated based on receiving a control signal from the base station.

41. The system of claim 40 , wherein the wireless device is configured to:

receive, via a downlink control channel, the control signal; and

activate the grant-free uplink radio resources by activating the grant-free uplink radio resources based on receiving the control signal.

42. The system of claim 40 , wherein the control signal is scrambled by a radio network temporary identifier.

43. The system of claim 40 , wherein the wireless device is configured to send, based on receiving the control signal, an acknowledgement.

44. The system of claim 35 , wherein the wireless device is configured to receive a response message associated with the one or more data packets, wherein the response message comprises downlink control information.

45. The system of claim 35 , wherein the wireless device is configured to:

determine an expiry of a time alignment timer of a cell group comprising the cell;

clear, based on the expiry of the time alignment timer, the grant-free uplink radio resources;

receive a timing advance command associated with the cell group;

re-activate, based on receiving the timing advance command, the grant-free uplink radio resources; and

send, via the re-activated grant-free uplink radio resources, one or more second data packets.

46. A system comprising:

a wireless device; and

a base station,

wherein the wireless device is configured to:

receive, from the base station, at least one radio resource control message comprising one or more configuration parameters of a cell, wherein the one or more configuration parameters indicate grant-free uplink radio resources associated with the cell;

activate, based on receiving the at least one radio resource control message, the grant-free uplink radio resources;

determine an expiry of a time alignment timer of a cell group comprising the cell;

clear, based on the expiry of the time alignment timer, the grant-free uplink radio resources;

re-activate, based on receiving a timing advance command, the grant-free uplink radio resources; and

send, via the re-activated grant-free uplink radio resources, one or more data packets; and

wherein the base station is configured to:

send, to the wireless device, the at least one radio resource control message;

send, to the wireless device, the timing advance command; and

receive, via the grant-free uplink radio resources, the one or more data packets.

47. The system of claim 46 , wherein the one or more configuration parameters further indicate at least one of:

demodulation reference signal configuration parameters;

a radio network temporary identifier; or

a preamble identifier.

48. The system of claim 46 , wherein the wireless device is configured to send the one or more data packets according to a modulation and coding scheme, wherein the one or more configuration parameters comprise the modulation and coding scheme.

49. The system of claim 46 , wherein the wireless device is configured to send, based on a quantity of permitted repeat transmissions, the one or more data packets, wherein the one or more configuration parameters comprise the quantity of permitted repeat transmissions for the one or more data packets.

50. The system of claim 46 , wherein the wireless device is configured to receive a response message associated with the one or more data packets, wherein the response message comprises downlink control information.