ng). The CORESET is defined: - in the frequency domain by a number of resource blocks; - in the time domain by a number of symbols; - by the number of REGs present; - by the level of aggregation L corresponding to the number of CCEs allocated to the PDCCH. The configuration of the CORESET (ControlResourceSET IE) is transmitted to the mobile UE via RRC messages. 7.2.1. Configuration of CORESET#0 Each CORESET is located in a carrier part named BWP. When the mobile switches on, it searches for the initial BWP band and listens to DCI messages carried by the PDCCH channel in the CORESET. CORESET#0 is associated with the initial BWP band configured from broadcast signals. The MIB broadcast message contains: - the SFN (System Frame Number); - the numerology (subCarrierSpacingCommon) of the initial BWP; 5G-NR Radio Interface - Bandwidth Part - the shift in the frequency domain between the position of the SSB block and the start of the resource grid (ssb-SubcarrierOffset) in the number of sub-carriers; - the position of the first reference signal DM-RS (dmrs-TypeA-Position); - the bandwidth of the control space of the PDCCH channel (pdcch- ConfigSIB1); - the state of the cell (prohibited or not: CellBarred); - authorization of intra-band cell re-selection (intraFreqReselection). MIB: Structure of data SFN: Frame Number SubCarrierSpacingCommon: cs15or60, ssc30or120 ssb-SubcarrierOffset: integer between 0 and 15 dmrs-TypeA-Position pdcch-ConfigSIBI: 8 bits: MSB I LSB cellBarred Index of the table (13-11 to 13-14 TS 38.213) to specify the occasion of PDCCH monitoring intraFreqReselection Index of the table (13-1 to 13-10 TS 38.213) to configure CORESET Figure 7.3. Data structure of MIB. MSB: Most Significant Bit, LSB: Least Significant Bit The initial BWP is a configuration common to all UE mobiles which camp in the cell. It is possible to limit access to the cell. The value subCarrierSpacingCommon takes as its value: - 15 kHz in the FR1 band or 60 kHz in the FR2 band (Scs15or60); - 30 kHz in the FR1 band or 120 kHz in the F