Patent ID: 11864038
Assignee: SAMSUNG ELECTRONICS CO., LTD.
Field: Digital communication (Electrical engineering)
Classification: CPC H | IPC H

Claim 6:
7. A method by a source base station, the method comprising:
receiving, on a serving cell from a terminal, a measurement report message including beam measurement information associated with a target cell, in response to a measurement reporting;
obtaining, from a target base station, a radio resource control (RRC) reconfiguration message of the target cell to perform a handover; and
transmitting, on the serving cell to the terminal, a handover command message including resource configuration of channel state information reference signals (CSI-RSs) associated with the target cell for an initial access beam alignment, based on the obtained RRC reconfiguration message of the target cell,
wherein a random access preamble transmitted from the terminal to the target cell corresponds to a CSI-RS which is selected from the CSI-RSs by measuring a subset of the CSI-RSs transmitted on the target cell, the selected CSI-RS corresponding to a best beam of the target cell.