 gNB can allocate downlink resources for the initial HARQ transmissions to the UEs configured with SPS. In that case, the RRC signaling defines the periodicity of the configured downlink assignments while PDCCH addressed to CS-RNTI can either sig- nal and activate the configured downlink assignment or deactivate it, that is, a PDCCH addressed to CS-RNTI indicates that the downlink assignment can be implicitly reused according to the periodicity defined by the RRC signaling until it is deactivated [8]. The dynamically allocated downlink reception overrides the configured downlink assign- ment in the same serving cell, if they overlap in time. When carrier aggregation or band- width adaptation is configured, one configured downlink assignment can be signaled per 212 Chapter 2 serving cell or per BWP, respectively. In each serving cell, the gNB can only configure one active downlink assignment for a UE at a time; however, it can simulta- neously configure multiple active downlink assignments on different serving cells. Activation and deactivation of configured downlink assignments are independent among the serving cells [8]. In the uplink, the gNB can dynamically allocate resources to the active UEs and identify them by their C-RNTI on PDCCH(s). A UE always monitors the PDCCH(s) in order to find possible grants for uplink transmission according to its configured DRX cycles. When carrier aggregation is configured, the same C-RNTI applies to all serving cells. In addi- tion, the gNB can allocate uplink resources for the initial HARQ transmissions to the UEs with the configured grants (alternatively known as semi-persistent scheduling). Two types of configured uplink grants are specified in NR. In Type 1 configured grant the RRC sig- naling directly provides the configured uplink grant (including the periodicity), whereas in Type 2 configured grant, the RRC signaling defines the periodicity of the configured uplink grant, while PDCCH addressed to CS-RNTI can either signal and activate the con- figured uplink grant or d