the same content within a modification period. For the minimum SI delivery, part of mini- mum SI is transmitted in PBCH. The remaining minimum SI (RMSI) is transmitted in the downlink shared channel. The initial BWP information is signaled by PBCH which con- tains the CORESET and PDSCH information for mapping the RMSI. Fig. 4.8 shows the process for transmission of various components of system information. Unlike LTE sys- tem where the minimum SI and a group of SI blocks were broadcast periodically, NR lim- its the amount of SI that is periodically broadcast and instead relies on less-frequent and on-demand transmission of the non-essential SI. The MIB message (in ASN.1 format), which is carried in PBCH, consists of the following components [13]: MIB : : = SEQUENCE { systemFrameNumber BIT STRING (SIZE (6) ) , subCarrierSpacingCommon ENUMERATED {scs15or60, scs30or120}, ssb-SubcarrierOffset INTEGER (0..15), (Continued) 434 Chapter 4 (Continued) dmrs-TypeA-Position ENUMERATED {pos2, pos3}, pdcch-ConfigSIB1 cellBarred ENUMERATED {barred, notBarred}, intraFregReselection ENUMERATED {allowed, notAllowed}, spareBIT STRING (SIZE (1)) PDCCH-ConfigSIB1 : : = SEQUENCE { controlResourceSetZero Control ResourceSetZero, searchSpaceZero SearchSpaceZero In the MIB message which is mapped to BCH logical channel, subCarrierSpacingCommon parameter indicates the subcarrier spacing for SIB1, Msg2/4 for the initial access and the SI messages where values 15 and 30 kHz are applicable to sub-6 GHz and values 60 and 120 kHz are applicable to carrier frequencies above 6 GHz; ssb-subcarrierOffset is the frequency-domain offset between SSB and the overall resource block grid in number of sub- carriers; dmrs-TypeA-Position indicates the position of the first downlink DM-RS; and pdcch-ConfigSIBI determines the bandwidth of PDCCH/SIB1 or the size of the CORESET containing common search space for PDCCH. In other words, the first field of pdcch- ConfigSIB1 determines the common CORESET corresponding to the initial downlink BWP and the second fie