Conditional Handover Configurations of Beams of a Cell

A method comprising:

• receiving, by a wireless device from a base station, at least one radio resource control (RRC) configuration message comprising an execution condition for a handover to a cell, wherein the at least one RRC configuration message comprises a plurality of parameters indicating:
• a channel state information-reference signal (CSI-RS) of the cell;
• a radio resource associated with the CSI-RS;
• and
• a preamble index indicating a preamble for a random access to the cell;
• and
• wherein the execution condition comprises the CSI-RS of the cell becoming better than a first value and a reference signal of a primary cell of the wireless device becoming worse than a second value;
• measuring the CSI-RS via the radio resource of the cell;
• determining that the execution condition for the handover to the cell is met based on measuring the CSI-RS of the cell;
• based on the determining, sending, via the cell, the preamble for the random access;
• and
• after completing the random access, sending an RRC reconfiguration complete message associated with executing the handover to the 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:

• receive, from a base station, at least one radio resource control (RRC) configuration message comprising an execution condition for a handover to a cell, wherein the at least one RRC configuration message comprises a plurality of parameters indicating:
• a channel state information-reference signal (CSI-RS) of the cell;
• a radio resource associated with the CSI-RS;
• and
• a preamble index indicating a preamble for a random access to the cell;
• and
• wherein the execution condition comprises the CSI-RS of the cell becoming better than a first value and a reference signal of a primary cell of the wireless device becoming worse than a second value;
• measure the CSI-RS via the radio resource of the cell;
• determine that the execution condition for the handover to the cell is met based on measuring the CSI-RS of the cell;
• based on the determining, send, via the cell, the preamble for the random access;
• and
• after completing the random access, send an RRC reconfiguration complete message associated with executing the handover to the cell.