Triggering csi measurement reporting for mobility

A base station (BS), comprising:

• a processor;
• and
• a transceiver operably coupled with the processor, the transceiver configured to:
• transmit, in a first signaling related to a candidate cell, one or more channel state information (CSI) report configurations for CSI acquisition, wherein:
• the first signaling indicates presence or absence of an indicator for the candidate cell, and
• when the indicator is absent, a first target CSI report configuration is based on the one or more CSI report configurations;
• and
• when the indicator is present, transmit, in a second signaling, information indicating a second target CSI report configuration,
• wherein one or more CSI reference signal (CSI-RS) resources for the candidate cell for CSI acquisition are based on the first or second target CSI report configuration.

A method performed by a user equipment (UE), the method comprising:

• receiving, in a first signaling related to a candidate cell, one or more channel state information (CSI) report configurations for CSI acquisition, wherein the first signaling indicates presence or absence of an indicator for the candidate cell;
• determining, based on the first signaling, presence or absence of the indicator;
• when the indicator is absent, determining a first target CSI report configuration based on the one or more CSI report configurations;
• when the indicator is present, receiving, in a second signaling, information indicating a second target CSI report configuration;
• and
• determining, based on the first or second target CSI report configuration, one or more CSI reference signal (CSI-RS) resources for the candidate cell for CSI acquisition.