Method and apparatus for handling lcp restrictions and harq process number

A base station (BS) comprising:

• a transceiver;
• one or more non-transitory computer-readable media containing computer-executable instructions embodied therein;
• and
• at least one processor coupled to the transceiver and the one or more non-transitory computer-readable media, the at least one processor configured to execute the computer-executable instructions, and the computer-executable instructions causing the BS to:
• transmit, to a user equipment (UE) via the transceiver, a radio resource control (RRC) message comprising a Packet Data Convergence Protocol (PDCP) configuration for a PDCP entity, the PDCP entity configured for being associated with more than two Radio Link Control (RLC) entities for Combine-Duplication, the Combine-Duplication comprising a combination of Carrier Aggregation Duplication (CA-Duplication) and Dual Connectivity Duplication (DC-Duplication) for the PDCP entity, wherein at least two RLC entities among the more than two RLC entities are associated with one of a master MAC entity (M-MAC) for a Master Cell Group (MCG) and a secondary MAC entity (S-MAC) for a Secondary Cell Group (SCG);
• and
• send, to the UE via the transceiver, activation of a PDCP Combine-Duplication.