NR MIB

Case :

• UE Powered ON
• Cell Search (PSS and SSS) and PBCH decode to get MIB
• Decode and store the MIB -> we will focus more on MIB itself 
• check if cellBarred= barred,  stop here   cellBarred != barred, move to next to process further information
• Decode SIB1 using parameters provided by MIB and store the results
• As SIB1 indicate no demand SI, decode other System Information (SIBs)

The MIB includes the system information transmitted on BCH(TE->UE).

    -> RLC TM 

    -> BCCH -> BCH->PBCH 

    ->  the MIB is always transmitted on the BCH with a periodicity of 80 ms and repetitions made within 80 ms (TS 38.212 [17], clause 7.1) and it includes parameters that are needed to acquire SIB1 from the cell. The first transmission of the MIB is scheduled in subframes as defined in TS 38.213 [13], clause 4.1 and repetitions are scheduled according to the period of SSB;

As per Spec:38.331

MIB ::=                             SEQUENCE {

    systemFrameNumber                   BIT STRING (SIZE (6)),
    subCarrierSpacingCommon             ENUMERATED {scs15or60, scs30or120},
    ssb-SubcarrierOffset                INTEGER (0..15),
    dmrs-TypeA-Position                 ENUMERATED {pos2, pos3},
    pdcch-ConfigSIB1                    PDCCH-ConfigSIB1,
    cellBarred                          ENUMERATED {barred, notBarred},
    intraFreqReselection                ENUMERATED {allowed, notAllowed},
    spare                               BIT STRING (SIZE (1))
}