| CPC H04W 76/30 (2018.02) [H04W 28/0278 (2013.01); H04W 80/02 (2013.01)] | 20 Claims |

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1. A method comprising:
receiving, by a base station central unit (CU) from a wireless device via a base station distributed unit (DU) a radio resource control (RRC) request message associated with a small data transmission (SDT) procedure of the wireless device;
receiving, by the base station CU from the base station DU, assistance information indicating whether a subsequent SDT is expected for the SDT procedure; and
transmitting, to the wireless device and after a SDT of the SDT procedure, an RRC release message.
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