一、解MIB和SIB1

1、MIB包含信息：

systemFrameNumber	The 6 most significant bit (MSB) of the 10-bit System Frame Number. The 4 LSB of the SFN are conveyed in the PBCH transport block as part of channel coding (i.e. outside the MIB encoding). 系统帧号高六位，低四位在MIB的payload里面传输。
subCarrierSpacingCommon	Subcarrier spacing for SIB1, Msg.2/4 for initial access and broadcast SI-messages. If the UE acquires this MIB on a carrier frequency <6GHz, the value scs15or60 corresponds to 15 Khz and the value scs30or120 corresponds to 30 kHz. If the UE acquires this MIB on a carrier frequency >6GHz, the value scs15or60 corresponds to 60 Khz and the value scs30or120 corresponds to 120 kHz. SIB1、Msg2/4、SIB广播的子载波间隔，对于频率小于6GHz的载频，scs15or60表示15kHz，scs30or120 表示60kHz；对于频率大于6GHz的载频，scs15or60表示60kHz，scs30or120 表示120kHz；
ssb-SubcarrierOffset	Corresponds to kSSB (see TS 38.213 [13]), which is the frequency domain offset between SSB and the overall resource block grid in number of subcarriers. (See 38.211). The value range of this field may be extended by an additional most significant bit encoded within PBCH as specified in 38.213 [13]. This field may indicate that this beam does not provide SIB1 and that there is hence no common CORESET (see TS 38.213 [13], section 13). In this case, the field pdcch-ConfigSIB1 may indicate the frequency positions where the UE may (not) find a SS/PBCH with a control resource set and search space for SIB1 (see 38.213 [13], section 13). Kssb的低4比特由高层参数ssb-SubcarrierOffset给出，指示了SSB与CRB之间的子载波偏移。
dmrs-TypeA-Position	Position of (first) DM-RS for downlink (see 38.211, section 7.4.1.1.1) and uplink (see 38.211, section 6.4.1.1.3). 第一个DM-RS的位置。
pdcch-ConfigSIB1	See TS 38.213 [13]. Determines a common ControlResourceSet (CORESET) a common search space and necessary PDCCH parameters. If the field ssb-SubcarrierOffset indicates that SIB1 is not present, the field pdcch-ConfigSIB1 indicate the frequency positions where the UE may find SS/PBCH block with SIB1 or the frequency range where the network does not provide SS/PBCH block with SIB1 (see TS 38.213 [13], section 13). 确定公共CORESET公共搜索空间以及需要的PDCCH参数，如果ssb-SubcarrierOffset指示没有SIB1，则pdcch-ConfigSIB1指示UE搜索SSB和SIB1的频域位置，或者不提供SSB和SIB1的频域范围
controlResourceSetZero	Corresponds to the 4 MSB RMSI-PDCCH-Config in TS 38.213 [13], section 13. Determines a common ControlResourceSet (CORESET) of initial DL BWP. RMSI-PDCCH-Config的高四位配置，指示初始下行BWP的公共CORESET
searchSpaceZero	Corresponds to 4 LSB of RMSI-PDCCH-Config in TS 38.213 [13], section 13. Determines a common search space of initial DL BWP RMSI-PDCCH-Config的低四位配置，指示初始下行BWP的公共搜索空间。
cellBarred	barred means the cell is barred, as defined in TS 38.304 [20]. 小区禁止指示
intraFreqReselection	Controls cell selection/reselection to intra-frequency cells when the highest ranked cell is barred, or treated as barred by the UE, as specified in TS 38.304 [20}. 小区禁止时同频小区重选