receiving a Physical Downlink Control Channel (PDCCH) signal, wherein the PDCCH signal indicates or provides information of a Physical Cell Identity (PCI);

determining to perform a first random access procedure on a first Transmission/Reception Point (TRP), based on the PDCCH signal, to obtain or derive a first Time Alignment (TA) information associated with the first TRP, wherein the first TRP is associated with the PCI different from PCIs of serving cells of the UE; and

performing multi-TRP operation on the first TRP associated with the first TA information and a second TRP associated with a second TA information, wherein the second TRP is a TRP of a serving cell of the UE, and wherein different sets of N_TA and/or N_{TA offset} are maintained or configured for the first TA information and the second TA information.