Serving base station update in subsequent cell switch

A first base station comprising:

• one or more processors;
• and
• memory storing instructions that, when executed by the one or more processors, cause the first base station to:
• receive, from a second base station, a first message comprising an identifier identifying a wireless device within a third base station;
• transmit, to the second base station, a handover success message indicating a candidate cell;
• receive, from the wireless device, a radio resource control (RRC) reconfiguration complete message;
• and
• transmit, to the third base station, a second message comprising the identifier.

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:
• transmit, to a second base station, a measurement report message;
• receive, from the second base station, a first radio resource control (RRC) reconfiguration message comprising a layer 1/layer 2 triggered mobility (LTM) configuration, wherein the LTM configuration comprises an LTM candidate configuration of a first candidate cell for an LTM;
• receive, from the second base station, a cell switch command indicating the first candidate cell;
• apply the LTM candidate configuration;
• transmit, to a first base station of the first candidate cell, an RRC reconfiguration complete message;
• and
• execute a subsequent LTM procedure for a second candidate cell, wherein a connection for the wireless device is established by a message comprising a first identifier identifying the wireless device, within the first base station.