Uplink resource configuration

1. A method comprising:

sending, by a base station distributed unit to a base station central unit, configuration parameters of at least one periodic radio resource for packet transmissions of a wireless device in a radio resource control, RRC, inactive or RRC idle state; and

receiving, by the base station distributed unit from the base station central unit, a wireless device context release message comprising:

an RRC release message; and

an indication that the base station distributed unit maintains the at least one periodic radio resource after the wireless device transitions to the RRC idle state or the RRC inactive state;

maintaining, in the RRC inactive or RRC idle state of the wireless device, the configuration parameters of the at least one periodic radio resource;

receiving, by the base station distributed unit from the wireless device in the RRC inactive or RRC idle state, one or more transport blocks via the at least one periodic radio resource.

2. The method of claim 1 , further comprising sending, by the base station distributed unit to the wireless device, one or more RRC messages comprising the configuration parameters of the at least one periodic radio resource and the RRC release message.

3. The method of claim 1 , further comprising, by the base station distributed unit during the RRC inactive or RRC idle of the wireless device, releasing or suspending one or more access-stratum contexts of the wireless device.

4. The method of claim 1 , further comprising maintaining, by the base station distributed unit before receiving the wireless device context release message, the configuration parameters of the at least one periodic resource.

5. The method of claim 1 , wherein the wireless device context message indicates that the base station distributed unit releases or suspends one or more access-stratum contexts of the wireless device.

6. The method of claim 5 , further comprising sending the configuration parameters to the wireless device is-based on the receiving the wireless device context message.

7. The method of claim 1 , further comprising sending, by the base station distributed unit to the base station central unit, one or more data packets of the one or more transport blocks.

8. The method of claim 1 , wherein the one or more transport blocks are associated with at least one RRC message for a small data transmission procedure.

9. The method of claim 8 , further comprising sending, by the base station distributed unit to the base station central unit, the at least one RRC message for the small data transmission procedure.

10. The method of claim 1 , wherein the configuration parameters of the at least one periodic resource are sent to the wireless device in one or more RRC messages.

11. A base station distributed unit comprising: one or more processors; and memory storing instructions that, when executed by the one or more processors, cause the base station distributed unit to:

send, to a base station central unit, configuration parameters of at least one periodic radio resource for packet transmissions of a wireless device in a radio resource control, RRC, inactive or RRC idle state; and

receive, from the base station central unit, a wireless device context release message comprising:

an RRC release message; and

an indication that the base station distributed unit maintains the at least one periodic radio resource after the wireless device transitions to the RRC idle state or the RRC inactive state;

maintain, in the RRC inactive or RRC idle state of the wireless device, the configuration parameters of the at least one periodic radio resource;

receive, from the wireless device in the RRC inactive or RRC idle state, one or more transport blocks via the at least one periodic radio resource.

12. The base station distributed unit of claim 11 , wherein the instructions further cause the base station distributed unit to send to the wireless device, one or more RRC messages comprising the configuration parameters of the at least one periodic radio resource and an RRC release message.

13. The base station distributed unit of claim 11 , wherein the instructions further cause the base station distributed unit to release or suspend, during the RRC inactive or RRC idle of the wireless device, one or more access-stratum contexts of the wireless device.

14. The base station distributed unit of claim 11 , wherein the instructions further cause the base station distributed unit to maintain, during the RRC inactive or RRC idle of the wireless device, the configuration parameters of the at least one periodic resource.

15. The base station distributed unit of claim 11 , wherein the wireless device context message indicates that the base station distributed unit releases or suspends one or more access-stratum contexts of the wireless device.

16. The base station distributed unit of claim 15 , wherein the sending the configuration parameters to the wireless device is based on the receiving the wireless device context message.

17. The base station distributed unit of claim 11 , wherein the instructions further cause the base station distributed unit to send, to the base station central unit, one or more data packets of the one or more transport blocks.

18. The base station distributed unit of claim 11 , wherein the one or more transport blocks are associated with at least one RRC message for a small data transmission procedure.

19. The base station distributed unit of claim 18 , wherein the instructions further cause the base station distributed unit to send, the at least one RRC message for the small data transmission procedure.

20. A system, comprising:

a base station distributed unit comprising: one or more processors and memory storing instructions that, when executed by the one or more processors, cause the base station distributed unit to:

send, to a base station central unit, configuration parameters of at least one periodic radio resource for packet transmissions of a wireless device in a radio resource control, RRC, inactive or RRC idle state; and

receive, from the base station central unit, a wireless device context release message comprising:

an RRC release message; and

an indication that the base station distributed unit maintains the at least one periodic radio resource after the wireless device transitions to the RRC idle state or the RRC inactive state;

maintain, in the RRC inactive or RRC idle state of the wireless device, the configuration parameters of the at least one periodic radio resource;

receive, from the wireless device in the RRC inactive or RRC idle state, one or more transport blocks via the at least one periodic radio resource; and

the base station central unit, wherein the base station central unit comprises: one or more processors and memory storing instructions that, when executed by the one or more processors, cause the base station central unit to:

receive, from the base station distributed unit, the configuration parameters

send, to the base station distributed unit, the wireless device context release message; and

receive, from the base station distributed unit, one or more data packets of the one or more transport blocks received via the at least one periodic radio resource.