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

Claim 0:
1. A method of performing initial beam alignment during a random access procedure by a terminal, the method comprising:
transmitting, on a serving cell, a measurement report message including beam measurement information associated with a target cell, in response to a measurement reporting event triggered;
receiving, on a serving cell, a handover command message including a resource configuration of channel state information reference signals (CSI-RSs) associated with the target cell for an initial access beam alignment;
performing downlink (DL) synchronization with the target cell based on synchronization signal (SS) blocks; and
transmitting, on the target cell, a random access preamble corresponding 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.