Method and apparatus for layer1/layer2 triggered mobility (ltm) operations

A User Equipment (UE) for performing a Layer1/Layer2 Triggered Mobility (LTM) operation, the UE comprising:

• at least one processor;
• and
• at least one non-transitory computer-readable medium coupled to the at least one processor and storing one or more computer-executable instructions that, when executed by the at least one processor, cause the UE to:
• receive, from a source cell, a target Transmission Configuration Indicator (TCI) state configuration corresponding to a target cell;
• receive, from the source cell, an LTM cell switch command via a first Medium Access Control (MAC) Control Element (CE), the LTM cell switch command indicating the target cell;
• switch from the source cell to the target cell;
• and
• apply a TCI state in the target cell, wherein:
• the TCI state is associated with the target TCI state configuration,
• the LTM cell switch command indicates the TCI state among a first set of TCI states in a case that the UE receives an LTM TCI state activation command,
• the LTM cell switch command indicates the TCI state among a second set of TCI states and activates the TCI state in a case that the UE does not receive the LTM TCI state activation command, and
• the first set of TCI states is a subset of the second set of TCI states.

A Base Station (BS) for configuring a Layer1/Layer2 Triggered Mobility (LTM) operation, the BS comprising:

• at least one processor;
• and
• at least one non-transitory computer-readable medium coupled to the at least one processor and storing one or more computer-executable instructions that, when executed by the at least one processor, cause the BS to:
• transmit, via a source cell, to a user equipment (UE), a target Transmission Configuration Indicator (TCI) state configuration corresponding to a target cell;
• and
• transmit, via the source cell, to the UE, an LTM cell switch command via a first Medium Access Control (MAC) Control Element (CE), the LTM cell switch command indicating the target cell and enabling the UE to switch from the source cell to the target cell and to apply a TCI state in the target cell, wherein:
• the TCI state is associated with the target TCI state configuration,
• the LTM cell switch command indicates the TCI state among a first set of TCI states in a case that the UE receives an LTM TCI state activation command,
• the LTM cell switch command indicates the TCI state among a second set of TCI states and activates the TCI state in a case that the UE does not receive the LTM TCI state activation command, and
• the first set of TCI states is a subset of the second set of TCI states.