User equipment and method for activating PUCCH spatial relation

A user equipment (UE), comprising:

• at least one processor;
• and
• at least one memory coupled to the at least one processor and storing computer-executable instructions that when executed by the at least one processor, cause the UE to:
• receive, from a base station (BS), a medium access control (MAC) control element (CE) comprising at least a first field and a second field, the first field indicating an identifier (ID) of a specific physical uplink control channel (PUCCH) spatial relation to be activated or deactivated, and the second field indicating an ID of a specific PUCCH resource;
• apply the MAC CE to all PUCCH resources in a specific PUCCH group that includes the specific PUCCH resource in a case that the MAC CE is identified by a first logical channel ID (LCID);
• and
• apply the MAC CE to the specific PUCCH resource in a case that the MAC CE is identified by a second LCID.