System Information (SI) is divided into the *MIB* and a number of SIBs and posSIBs where:
System Information (SI) is divided into the *MIB* and a **number** of SIBs and posSIBs where:
- 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;
- 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 $`\textcolor{red}{\text{subframes}}`$ as defined in TS 38.213 \[13\], clause 4.1 and repetitions are scheduled according to the period of SSB;
**NOTE** 1: If the period of SSB is larger than 80 ms, the MIB is transmitted with the same periodicity as that of SSB.
**NOTE** 1: If the periodss of than 80 ms, the MIB is transmitted with the same periodicity as that of SSB.
$`\textcolor{red}{\text{\~~3\~~}}`$
- the *SIB1* is transmitted on the DL-SCH with a periodicity of 160 ms and variable transmission repetition periodicity within 160 ms as specified in TS 38.213 \[13\], clause 13. The default transmission repetition periodicity of *SIB1* is 20 ms but the actual transmission repetition periodicity is up to network implementation. For SSB and CORESET multiplexing pattern 1, *SIB1* repetition transmission period is 20 ms. For SSB and CORESET multiplexing pattern 2/3, *SIB1* transmission repetition period is the same as the SSB period (TS 38.213 \[13\], clause 13). *SIB1* includes information regarding the availability and scheduling (e.g. mapping of SIBs to SI message, periodicity, SI-window size) of other SIBs with an indication whether one or more SIBs are only provided on-demand and, in that case, the configuration needed by the UE to perform the SI request. *SIB1* is cell-specific SIB;
