h-ConfigCommon (O) cyclicPrefix (O) downlinkBWP-ToAddModLis (O) firstActiveDownlinkBWRId (O) bwp-InactivityTimer BWP-DownlinkDedicated defaultDownlinkBWRId (O) uplinkConfig (O) pdcch-Config (O) pdsch-Config (O) sps-Config (O) radioLinkMonitoringConfig (O) UplinkConfig BWP-Uplink BWP-UplinkCommon bwp-ld genericParameters locationAndBandwidth initialUplinkBWP (O) bwp-Common (O) rach-ConfigCommon (O) subcarrierSpacing uplinkBWP-ToReleaseList (O) bwp-Dedicated (O) pusch-ConfigCommon (O) cyclicPrefix (O) uplinkBWP-ToAddModList (O) pucch-ConfigCommon (O) firstActiveUplinkBWRId (O) BWP-UplinkDedicated pucch-Config (O) pusch-Config (O) configuredGrantConfig (O) sps-Config (O) beamFailureRecoveryConfig (O) FIGURE 2-24 BWP-associated configuration information elements. BWP, bandwidth part. Frequency SSB Initial Cell Search Initial Active DL BWP Initial Active DL BWP Initial Active UL BWP Initial Active DL BWP Post RRC Initial Active UL BWP Connected Default DL BWP Active DL BWP Default UL BWP Active UL BWP FIGURE 2-25 BWP configuration and operation. BWP, bandwidth part. Chapter 2 System components, requirements, and interfaces 69 application, leading, for example, to unnecessary energy consumption caused by high sam- ple rates and DSP processing requirements as well as inefficient RF utilization. With bandwidth adaptation (BA), the receive and transmit bandwidth of a UE need not be as large as the bandwidth of the cell and can be adjusted: the width can be ordered to change (e.g., to shrink during period of low activity to save power); the location can move in the frequency domain (e.g., to increase scheduling flexibility); and the SCS can be ordered to change (e.g., to allow different services). A subset of the total cell bandwidth of a cell is referred to as a Bandwidth part (BWP) and BA is achieved by configuring the UE with BWP (s) and telling the UE which of the configured BWPs is currently the active one. Each BWP can have unique numerology (e.g., SCS) and width (frequency). For example, as shown (copied from 38.300