Methods for activating pre-configured cell configurations using medium access control (mac) control elements (ce)

A wireless transmit/receive unit (WTRU) comprising a processor and a memory, the processor configured to:

• receive a radio resource control (RRC) message comprising configuration information, the configuration information comprising one or more preconfigured candidate cell configurations, wherein each of the preconfigured candidate cell configurations comprises a special cell (SpCell) configuration, one or more secondary cell (SCell) configurations, and a candidate cell index;
• receive a medium access control (MAC) control element (CE), wherein the MAC CE comprises a target configuration identifier (ID), and an indication of one or more transmission configuration indicator (TCI) states wherein the target configuration ID indicates a target SpCell associated with both of the one or more preconfigured candidate cell configurations and a candidate cell index, and the indication of one or more TCI states is associated with the target SpCell;
• initiate a handover to the target SpCell based on the target configuration ID;
• and
• activate the one or more TCI states associated with the target SpCell.

A method implemented by a wireless transmit/receive unit (WTRU), the method comprising:

• receiving a radio resource control (RRC) message comprising candidate configuration information, the configuration information comprising one or more preconfigured candidate cell configurations, wherein each of the preconfigured candidate cell configurations comprises a special cell (SpCell) configuration, one or more secondary cell (SCell) configurations, and a candidate cell index;
• receiving a medium access control (MAC) control element (CE), wherein the MAC CE comprises a target configuration identifier (ID) and an indication of one or more transmission configuration indicator (TCI) states, wherein the target configuration ID indicates a target SpCell associated with both of the one or more preconfigured candidate cell configurations and a candidate cell index, and the indication of one or more TCI states is associated with the target SpCell;
• initiating a handover to the target SpCell based on the target configuration ID;
• and
• activating the one or more TCI states associated with the target SpCell.