 is applica- ble within an area referred to as SI area, which consists of one or several cells and is identi- fied by systemInformationAreaID. For a UE in RRC_CONNECTED state, the network can provide SI through dedicated signaling using the RRCReconfiguration message, for exam- ple, if the UE has an active BWP with no common search space configured to monitor SI or paging. For PSCell and SCells, the network provides the required SI by dedicated signal- ing, that is, within an RRCReconfiguration message. Nevertheless, the UE acquires the MIB of the PSCell in order to obtain the SFN timing of the SCG which may be different from that of MCG. Upon change of the relevant SI for SCell, NG-RAN releases and adds the concerned SCell. The physical layer imposes a limit on the maximum size of a SIB. The maximum SIB1 or SI message size is 2976 bits [14]. We will explain in Chapter 3 that the PDCCH (physical downlink control channel) monitor- ing occasions for SI message are determined based on the search space indicated by searchSpaceOtherSystemInformation parameter, if the latter parameter is not set to zero. The PDCCH monitoring occasions for SI message, which are not overlapping with uplink symbols (determined according to tdd-UL-DL-ConfigurationCommon) are sequentially num- bered from one in the SI-window. The PDCCH monitoring occasion(s) [xN + K for SI mes- sage in SI-window correspond to the Kth transmitted synchronization signal block [see Chapter 3 for description], where = 0, X - 1, K = 2, number actual transmitted synchronization signal blocks determined according to ssb- PositionsInBurst in SIB1 and X = Number of PDCCH monitoring occasions in SI - window/N] [14]. 2.3.3 User Equipment States and State Transitions The operation of the RRC sublayer is guided by a state machine which defines the states that a UE may be present in at any time during its operation in the network. Apart from RRC_CONNECTED and RRC_IDLE states, which are similar to those of LTE, the NR has introduced a new RRC state referred to as RRC_INAC