A User Equipment (UE) includes one or more non-transitory computer-readable media having computer-executable instructions embodied thereon and at least one processor coupled to the one or more non-transitory computer-readable media. The at least one processor is configured to execute the computer-executable instructions to: receive, from a base station, a Radio Resource Control (RRC) message to configure one or more logical channels; receive, from the base station, an allocation of a first radio resource for uplink transmission; receive, from the base station, a priority indicator to determine whether a first priority order or a second priority order is used in a first logical channel prioritization (LCP) procedure; and apply the first LCP procedure on the one or more logical channels to generate a first Medium Access Control (MAC) Protocol Data Unit (PDU) to be transmitted on the first radio resource.