Target Base Station Initiated Layer 1/Layer 2 Triggered Mobility Cancelation

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 base station, a measurement report message;
• receive, from the 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 candidate cell for an LTM;
• an identifier of the LTM candidate configuration;
• and
• a cell identifier of the candidate cell;
• after receiving the first RRC reconfiguration message:
• store the LTM candidate configuration of the candidate cell for the LTM;
• and
• transmit, to the base station, an RRC reconfiguration complete message;
• transmit, to the base station, a layer 1 measurement report;
• and
• receive, from the base station, a second RRC reconfiguration message indicating to release the LTM candidate configuration of the candidate cell, wherein a cancelling of the LTM is indicated by an LTM cancel message comprising:
• the identifier of the candidate cell;
• and
• a cause value indicating a reason for the cancelling of the LTM of the candidate cell.

A non-transitory computer-readable medium comprising instructions that, when executed by one or more processors of a wireless device, cause the wireless device to:

• transmit, to a base station, a measurement report message;
• receive, from the 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 candidate cell for an LTM;
• an identifier of the LTM candidate configuration;
• and
• a cell identifier of the candidate cell;
• after receiving the first RRC reconfiguration message:
• store the LTM candidate configuration of the candidate cell for the LTM;
• and
• transmit, after receiving the first RRC reconfiguration message and to the base station, an RRC reconfiguration complete message;
• transmit, to the base station, a layer 1 measurement report;
• and
• receive, from the base station, a second RRC reconfiguration message indicating to release the LTM candidate configuration of the candidate cell, wherein a cancelling of the LTM is indicated by an LTM cancel message comprising:
• the identifier of the candidate cell;
• and
• a cause value indicating a reason for the cancelling of the LTM of the candidate cell.