Subband Full Duplex Configuration Exchange in Split Radio Access Network

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 central unit (CU) of a base station, one or more radio resource control (RRC) messages comprising an information element (IE) which indicates a serving cell configuration, wherein:
• the serving cell configuration comprises a first subband full duplex (SBFD) configuration to be used in a cell;
• the first SBFD configuration indicates:
• a frequency of an uplink subband of one or more SBFD symbols;
• a bandwidth of the uplink subband of the one or more SBFD symbols;
• a frequency of a downlink subband of the one or more SBFD symbols;
• and
• a bandwidth of the downlink subband of the one or more SBFD symbols;
• the first SBFD configuration is indicated by a F1 setup request message;
• and
• a second SBFD configuration indicated by a gNB-CU configuration update message is based on the first SBFD configuration;
• and
• based on the first SBFD configuration, communicate with the base station.