A method for use in a scalable New Radio (NR) cell system comprises, at a gNB: configuring a physical transmission and reception point (TRP) in a New Radio (NR) cell as a high power gNB's distribution unit (DU) operating on a first component carrier (CC) layer; configuring the remaining physical TRPs in the NR cell as low power gNB's DUs operating on one or multiple second CC layers; further configuring the carrier bandwidths on the first CC layer and second CC layers to comprise multiple bandwidth parts (BWPs); via high layer signaling, configuring one or more advanced UEs in services or requesting services with a set of indexed BWPs and a configurable “initial BWP” for active BWP switching operation; and via high layer signaling, configuring one or more advanced UEs in services or requesting services with two or more sets of indexed BWPs for active BWPs aggregation operation.