tion is based on the count of reselections, it does not give the exact speed, but just a rough estimate of UE movement; nevertheless, this provides a means for the network to control UE reselection behavior in accordance with the UE movement by making the UE modify Qhyst and/or Treselection based on the UE mobility state. Different from E-UTRA, the speed-dependent scaling method is not applied in the RRC_CONNECTED state for connected mode mobility parameters. 7.7.5 RRC Connection Control and Mobility 7.7.5.1 RRC Connection Control Connection control can be considered as the primary task of RRC: Ensuring that the UE is connected to the network and is able to transmit and receive data. Thus, RRC 7 5G Radio Protocols Network Reception of system information (cell reselection and initial access parameters) ETWS/CMAS notification Connection establishment request Connection setup NAS information transfer Initial security activation UE capability enquiry UE capability reporting Connection reconfiguration (user plane and DRB configuration) Connection reconfiguration (lower layer parameters) Connection reconfiguration (measurement and gap configuration) Connection reconfiguration (serving cell management for CA/DC) Connection reconfiguration (RRC context transfer + handover with security key change) Connection release Figure 7.21 Example of RRC connection control tasks during lifetime of an RRC connection. connection control is used for setting up, modifying, and releasing the configured UE RRC state and the corresponding parameters in each RRC state via broadcast or dedi- cated signaling. The mobility procedures (which are further detailed in Section 7.7.5.3) are also accomplished using the umbrella of RRC connection control procedures, by reusing the RRC connection modification procedure. These basic tasks of connection control are illustrated in a sequence diagram in Figure 7.21 (showing most connection control actions, depicted in an exemplary manner to show how they could occur during the lifetime of a single connecti